Merge pull request 'lcd1602_v2' (#12) from lcd1602_v2 into dev

Reviewed-on: #12

.gitignore

@@ -0,0 +1,9 @@
+hdlc1.c
+hdlc1.h
+hdlc_frame.c
+hdlc_frame.h
+main1.c
+uart.c
+uart.h
+
+!./hdlc

.idea/.gitignore

@@ -1,8 +0,0 @@
-# Default ignored files
-/shelf/
-/workspace.xml
-# Editor-based HTTP Client requests
-/httpRequests/
-# Datasource local storage ignored files
-/dataSources/
-/dataSources.local.xml

.idea/modules.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/Display_Avr_3.iml" filepath="$PROJECT_DIR$/.idea/Display_Avr_3.iml" />
-    </modules>
-  </component>
-</project>

.idea/vcs.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
-  </component>
-</project>

Disp1602.cpp

@@ -0,0 +1,87 @@
+#include <Wire.h>
+
+#include <LiquidCrystal_I2C.h>
+
+LiquidCrystal_I2C lcd(0x27, 16, 2);
+
+struct DisplayData {
+  char topLine[64];
+  int value1;
+  int value2;
+  int value3;
+};
+
+struct TextCounter {
+  unsigned long startTime;
+  int incrementValue;
+};
+
+TextCounter textCounter;
+
+void setup() {
+  lcd.begin(16, 2);
+  textCounter.startTime = millis(); // Запоминаем время запуска программы
+}
+
+void loop() {
+  unsigned long currentTime = millis(); // Текущее время
+
+  // Проверяем, прошло ли 500 мс с момента последнего увеличения incrementValue
+  if (currentTime - textCounter.startTime >= 500) {
+    textCounter.incrementValue++; // Увеличиваем incrementValue на 1
+    textCounter.startTime = currentTime; // Обновляем время
+  }
+
+  DisplayData displayData;
+  strncpy(displayData.topLine, "we are responsible for those who have been tame ", sizeof(displayData.topLine) - 1);
+  displayData.topLine[sizeof(displayData.topLine) - 1] = '\0';
+  displayData.value1 = 500;
+  displayData.value2 = 800;
+  displayData.value3 = 855;
+
+  // Буферы для заполнения данных
+  char buffer1[17];
+  char buffer2[17];
+
+  // Заполнение буфера 1
+  fillBuffer1(displayData.topLine, buffer1, sizeof(buffer1), textCounter.incrementValue);
+
+  // Заполнение буфера 2
+  fillBuffer2(displayData.value1, displayData.value2, displayData.value3, buffer2, sizeof(buffer2));
+
+  // Создание массива для вывода на дисплей
+  char displayArray[32];
+  strncpy(displayArray, buffer1, 16); // Копирование первых 16 символов из buffer1 в displayArray
+  strncpy(displayArray + 16, buffer2, 16); // Копирование первых 16 символов из buffer2 в displayArray, начиная с позиции 16
+
+  // Вывод данных на экран
+  lcd.setCursor(0, 0);
+  lcd.print(displayArray);
+
+  lcd.setCursor(0, 1);
+  lcd.print(displayArray + 16); // Вывод второй половины displayArray
+}
+
+void fillBuffer1(const char * source, char * buffer, size_t bufferSize, int incrementValue) {
+  int startIndex = incrementValue % strlen(source); // Определяем начальный индекс на основе incrementValue
+  int endIndex = startIndex + 16;
+
+  if (endIndex > strlen(source)) {
+    // Если endIndex превышает длину строки source, переносим его на начало строки
+    endIndex = endIndex - strlen(source);
+
+    // Копируем символы с конца строки source
+    strncpy(buffer, source + startIndex, strlen(source) - startIndex);
+
+    // Копируем оставшиеся символы с начала строки source
+    strncat(buffer, source, endIndex);
+  } else {
+    strncpy(buffer, source + startIndex, endIndex - startIndex);
+  }
+
+  buffer[endIndex - startIndex] = '\0'; // Установка нулевого символа в конце буфера
+}
+
+void fillBuffer2(int value1, int value2, int value3, char * buffer, size_t bufferSize) {
+  snprintf(buffer, bufferSize, "%d.%d.%d", value1, value2, value3);
+}

UART/circular_buf.c

@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "circular_buf.h"
+
+
+void initialize_buffer(struct circular_buffer* cb) {
+	cb->buf_head = 0;
+	cb->buf_tail = 0;
+}
+// Проверка, пустой ли буфер
+int buffer_empty(const struct circular_buffer* cb) {
+	return cb->buf_head == cb->buf_tail;
+}
+// Проверка, заполнен ли буфер
+int buffer_full(const struct circular_buffer* cb) {
+	return (cb->buf_tail + 1) % BUFFER_SIZE == cb->buf_head; //проверяем следующее число, если оно будет совпадать с индексом головы то будет false, при совпадении вывод true
+}
+// Запись в буфер
+void write_buffer(struct circular_buffer* cb, int value) {
+	if (buffer_full(cb)) { // проверяем, заполнен ли буфер
+		return;
+	}
+	cb->buffer[cb->buf_tail] = value;// записываем значение в элемент массива в хвост
+	cb->buf_tail = (cb->buf_tail + 1) % BUFFER_SIZE;// присваивается cb->buf_tail, обновляется его значение на следующий индекс в буфере
+}
+// Чтение элемента
+int read_buffer(struct circular_buffer* cb) {
+	if (buffer_empty(cb)) { // проверка на пустоту
+		return -1;// -1  как индикатор в случае ошибки
+	}
+	int value = cb->buffer[cb->buf_head]; // чтение по индексу головы
+	cb->buf_head = (cb->buf_head + 1) % BUFFER_SIZE; // увеличиваем индекс на 1
+	return value;
+}
+
+

UART/circular_buf.h

@@ -0,0 +1,18 @@
+#ifndef CIRCULAR_BUFFER_H
+#define CIRCULAR_BUFFER_H
+
+#define BUFFER_SIZE 32
+
+struct circular_buffer{
+	unsigned char buffer[BUFFER_SIZE];
+	unsigned char buf_head;
+	unsigned char buf_tail;
+};
+
+void initialize_buffer(struct circular_buffer* cb);
+int buffer_empty(const struct circular_buffer* cb);
+int buffer_full(const struct circular_buffer* cb);
+void write_buffer(struct circular_buffer* cb, int value);
+int read_buffer(struct circular_buffer* cb);
+
+#endif /* CIRCULAR_BUFFER_H */

UART/timer.c

@@ -0,0 +1,21 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+static volatile unsigned long timerMillis = 0;
+
+void timerInit() {
+	TCCR1B |= (1 << WGM12) | (1 << CS11) | (1 << CS10);
+	OCR1A = 250;
+	TIMSK1 |= (1 << OCIE1A);
+	sei();
+}
+
+unsigned long millis() {
+	unsigned long ms;
+	ms = timerMillis;
+	return ms;
+}
+
+ISR(TIMER1_COMPA_vect) {
+	timerMillis++;
+}

UART/timer.h

@@ -0,0 +1,7 @@
+#ifndef TIMER_H
+#define TIMER_H
+
+void timerInit();
+unsigned long millis();
+
+#endif // TIMER_H

UART/uart.c

@@ -0,0 +1,64 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <stdint.h>
+#include <string.h>
+#include "timer.h"
+#include "circular_buf.h"
+#include "uart.h"
+
+void UART_init(void) {
+	UCSR0B = (1 << RXEN0) | (1 << TXEN0) | (1 << RXCIE0) | (1 << UDRIE0); // прерывание по приему и опустошению буфера передачи
+	UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);
+	UBRR0H = 0;
+	UBRR0L = 103;
+}
+
+void UART_send(uint8_t* data, size_t length) {
+	for (size_t i = 0; i < length; i++) {
+		if (!buffer_full(&usartTxBuffer)) {
+			write_buffer(&usartTxBuffer, data[i]);
+			} else {
+			break; // если буфер передачи заполнен, то отправка прерывается
+		}
+	}
+	UCSR0B |= (1 << UDRIE0); // Включаем прерывание по опустошению буфера
+}
+
+// Получение данных из буфера
+int UART_receive(uint8_t* data, size_t length) {
+	char overflow=0; // Флаг переполнения, который устанавливается, если превышен размер массива 
+	uint32_t byteCount=0; // Счетчик байтов, принятых из буфера приема
+	uint32_t timeout_ms = 4; // Таймаут в миллисекундах для общего времени приема данных
+	uint32_t start_time = millis();
+	//Цикл приема данных с таймаутом
+	while(1)
+	{
+		// Пока буфер приема не пуст и не истек таймаут общего времени,  
+		// функция продолжает читать байты из буфера и сохранять их в массив data.
+		while (!buffer_empty(&usartRxBuffer)) {
+			int  reader = read_buffer(&usartRxBuffer);//прием и запись символа в переменную
+			if(byteCount<=length){
+				data[byteCount] = reader; // запись в массив с индексом byteCount
+			}
+			else{
+				overflow=1;
+			}
+			byteCount++;
+
+			start_time = millis();
+		}
+		if ((millis() - start_time) > timeout_ms) { // если превышение времени в 4 ms
+			break;
+		}
+		
+	}
+	return overflow?-1:byteCount; // возвращает количество успешно принятых байт или -1
+}
+
+// прерывание по завершению приема
+ISR(USART_RX_vect) {
+	uint8_t data = UDR0; // читаем из регистра UDR0
+	if (!buffer_full(&usartRxBuffer)) {
+		write_buffer(&usartRxBuffer, data);// записываем символ в буфер приема
+	}
+}

UART/uart.h

@@ -0,0 +1,18 @@
+#ifndef UART_H
+#define UART_H
+#include <stdint.h> 
+#include <stddef.h>
+#include "timer.h" 
+#include "circular_buf.h" 
+
+#define F_CPU 16000000
+
+struct circular_buffer usartRxBuffer;
+struct circular_buffer usartTxBuffer;
+
+void UART_init(void);
+void UART_send(uint8_t* data, size_t length);
+int UART_receive(uint8_t* data, size_t length);
+
+
+#endif /* UART_H */

client.c

@@ -1,125 +0,0 @@
-#include "client.h"
-
-#include <stdio.h>
-#include <fcntl.h>
-
-#define START_FLAG 0x7E
-#define END_FLAG 0x7E
-
-void init_Client(Client* client, bool test_is_valid, uint8_t address) {
-    client->TEST_IS_VALID = test_is_valid;
-    client->address = address;
-    client->_send_sequence_number = 0;
-    client->poll_final = 1;
-    client->_receive_sequence_number = 0;
-}
-
-
-void connect(Client* client) {
-    UFrame u_frame;
-    init_UFrame(&u_frame, client->address, client->poll_final, "BP", NULL, 0);
-
-    uint8_t result[256];
-    create_frame(&u_frame.base, result);
-
-
-    // Wait for acknowledgment frame
-    bool flag = true;
-    uint8_t data;
-    while(flag){
-        data = uart_read();
-        if (data > 0){
-            flag = false;
-        }
-    }
-
-    HDLCFrame frame;
-    init_HDLCFrame(&frame, 0, 0, &data + 3, 256 - 6);
-    if (validate(&data, 256)) {
-        return;
-    } else {
-        // Connection failed
-    }
-}
-
-void send(Client* client, uint8_t* data, size_t data_length) {
-    connect(client);
-
-    IFrame i_frame;
-    init_IFrame(&i_frame, client->address, client->_receive_sequence_number, client->poll_final, client->_send_sequence_number, data, data_length);
-
-    uint8_t result[256];
-    create_frame(&i_frame.base, result);
-
-    uart_send_byte(*i_frame.base.data);
-
-    client->_send_sequence_number++;
-}
-
-void receive_data(uint8_t* recivedData) {
-    bool flag = true;
-    while(flag){
-        *recivedData = uart_read();
-        if (recivedData > 0){
-            flag = false;
-        }
-    }
-}
-
-#include <stdbool.h>
-
-bool validate(const uint8_t* frame, size_t length) {
-    if (length < 4 || frame[0] != START_FLAG || frame[length - 1] != END_FLAG) {
-        // Invalid frame length or missing start/end flag
-        return false;
-    }
-
-    uint16_t received_fcs = (frame[length - 3] << 8) | frame[length - 2];
-    uint16_t calculated_fcs = 0xFFFF;
-
-    for (size_t i = 1; i < length - 3; i++) {
-        uint8_t byte = frame[i];
-        calculated_fcs = (calculated_fcs >> 8) ^ (calculated_fcs << 8) ^ byte;
-        calculated_fcs &= 0xFFFF;
-    }
-
-    return received_fcs == calculated_fcs;
-}
-
-int sendSerialData(const char* port, uint8_t* data, size_t length) {
-    int serial_port = open(port, O_RDWR);
-
-    if (serial_port < 0) {
-        perror("Error opening the serial port");
-        return -1;
-    }
-
-    ssize_t bytes_written = write(serial_port, data, length);
-
-    if (bytes_written < 0) {
-        perror("Error writing to the serial port");
-        return -1;
-    }
-
-    close(serial_port);
-    return bytes_written;
-}
-
-int receiveSerialData(const char* port, uint8_t* data, int length) {
-    int serial_port = open(port, O_RDWR); // Replace "port" with your serial port device
-
-    if (serial_port < 0) {
-        perror("Error opening the serial port");
-        return -1;
-    }
-
-    ssize_t bytes_read = read(serial_port, data, length);
-
-    if (bytes_read < 0) {
-        perror("Error reading from the serial port");
-        return -1;
-    }
-
-    close(serial_port);
-    return bytes_read;
-}

client.h

@@ -1,24 +0,0 @@
-#ifndef CLIENT_H
-#define CLIENT_H
-
-#include "hdlc_frame.h"
-#include "uart_module.h"
-#include <stdbool.h>
-#include <stddef.h> // Для использования size_t
-#include <stdint.h>
-
-typedef struct {
-    bool TEST_IS_VALID;
-    uint8_t address;
-    uint8_t _send_sequence_number;
-    uint8_t poll_final;
-    uint8_t _receive_sequence_number;
-} Client;
-
-void init_Client(Client* client, bool test_is_valid, uint8_t address);
-void connect(Client* client);
-void send(Client* client, uint8_t* data, size_t data_length);
-void receive_data(uint8_t* recivedData);
-bool validate(const uint8_t* frame, size_t length);
-
-#endif

display_functions.c

@@ -0,0 +1,64 @@
+#include "display_functions.h"
+#include <Wire.h>
+
+#define LCD_ADDRESS 0x27 // Адрес дисплея на шине I2C
+#define LCD_WIDTH 16     // Ширина дисплея в символах
+#define LCD_HEIGHT 2     // Высота дисплея в строках
+
+void lcd_send_command(uint8_t command) {
+    Wire.beginTransmission(LCD_ADDRESS);
+    i2c_send_byte(0x80); // Co = 0, Rs = 0 (управляющий байт)
+    i2c_send_byte(command);
+    Wire.endTransmission();
+}
+
+void lcd_send_data(uint8_t data) {
+    Wire.beginTransmission(LCD_ADDRESS);
+    i2c_send_byte(0xC0); // Co = 0, Rs = 1 (байт данных)
+    i2c_send_byte(data);
+    Wire.endTransmission();
+}
+
+void lcd_send_string(const char *str) {
+    while (*str) {
+        lcd_send_data(*str);
+        str++;
+    }
+}
+
+void lcd_clear() {
+    lcd_send_command(0x01); // Очистка дисплея
+    _delay_ms(2); // Небольшая пауза для завершения очистки
+}
+
+void lcd_init() {
+    Wire.begin();
+    lcd_send_command(0x38); // Установка интерфейса: 8 бит данных, 2 строки, 5x8 точек
+    lcd_send_command(0x08); // Отключение дисплея, курсора и мигания курсора
+    lcd_send_command(0x01); // Очистка дисплея
+    _delay_ms(2); // Небольшая пауза для завершения очистки
+    lcd_send_command(0x06); // Установка направления текста: курсор увеличивается, сдвиг дисплея
+    lcd_send_command(0x0C); // Включение дисплея без курсора и мигания курсора
+}
+
+void lcd_print_char(char c) {
+    lcd_send_data(c);
+}
+
+void lcd_print_string(const char *str) {
+    lcd_send_string(str);
+}
+
+void lcd_update(const DisplayData *displayData, const TextCounter *textCounter) {
+    lcd_clear(); // Очистка дисплея перед выводом новой информации
+
+    // Вывод данных на первую строку
+    lcd_send_command(0x80); // Установка курсора на начало первой строки
+    lcd_send_string(displayData->topLine);
+
+    // Вывод данных на вторую строку
+    lcd_send_command(0xC0); // Установка курсора на начало второй строки
+    char buffer[17];
+    snprintf(buffer, sizeof(buffer), "%d.%d.%d", displayData->value1, displayData->value2, displayData->value3);
+    lcd_send_string(buffer);
+}

display_functions.h

@@ -0,0 +1,24 @@
+#ifndef DISPLAY_FUNCTIONS_H
+#define DISPLAY_FUNCTIONS_H
+
+#include "i2c_functions.h"
+#include <stdint.h>
+
+struct DisplayData {
+  char topLine[64];
+  int value1;
+  int value2;
+  int value3;
+};
+
+struct TextCounter {
+  unsigned long startTime;
+  int incrementValue;
+};
+
+void lcd_init();
+void lcd_print_char(char c);
+void lcd_print_string(const char *str);
+void lcd_update(const DisplayData *displayData, const TextCounter *textCounter);
+
+#endif

hdlc/client.c

@@ -0,0 +1,123 @@
+#include "client.h"
+#include "hdlc.h"
+#include "stdio.h"
+
+#define ERR_INVALID_DATA_SIZE -1
+#define ERR_ALL_BUFFERS_FILL -2
+#define ERR_INVALID_PARAMS -3
+#define ERR_INVALID_STATE -4
+#define ERR_FRAME_TIME_OUT -5
+#define ERR_INVALID_SEQ_NUMBER_FRAME -6
+#define ERR_TIMEOUT_ANSWER -7
+
+#define SIZE_DATA_BUFFERS 64
+
+int connecting_frame_timeout_bf;
+
+void init_hdlc_client(struct Client* client, int connecting_frame_timeout){
+    client->state = IDLE_STATE;
+    client->connecting_frame_timeout = connecting_frame_timeout;
+    connecting_frame_timeout_bf = connecting_frame_timeout;
+
+    client->current_state_hdlc.control_escape = 0;
+    client->current_state_hdlc.fcs = FCS_INIT_VALUE;
+    client->current_state_hdlc.start_index = -1;
+    client->current_state_hdlc.end_index = -1;
+    client->current_state_hdlc.src_index = 0;
+    client->current_state_hdlc.dest_index = 0;
+}
+
+void connect(struct Client* client, hdlc_control_t* frame){
+    client->state = CONNECTING;
+
+    client->frameS.seq_no = 0;
+    client->frameS.frame = S_FRAME;
+
+    *frame = client->frameS;
+
+//    if (client->frame1.seq_no == -4){
+//        client->frame1.seq_no = 0;
+//        client->frame1.frame = S_FRAME;
+//
+//        *frame = client->frame1;
+//    } else if (client->frame1.seq_no == -4){
+//        client->frame1.seq_no = 0;
+//        client->frame1.frame = S_FRAME;
+//
+//        *frame = client->frame1;
+//    }
+}
+
+int send_data(struct Client* client, hdlc_control_t* frame, uint8_t* data, size_t data_len){
+    if (client->state != READY_STATE){
+        return ERR_INVALID_STATE;
+    }
+
+    client->state = RECIVING;
+
+    if (SIZE_DATA_BUFFERS < data_len){
+        return ERR_INVALID_DATA_SIZE;
+    }
+
+    client->frameI.seq_no = 0;
+    client->frameI.frame = I_FRAME;
+    client->data_i_frame = *data;
+    client->len_data_i_frame = data_len;
+
+    *frame = client->frameI;
+
+    client->state = RECIVING;
+};
+
+int hdlc_get_raw_frame(struct Client *client, hdlc_control_t* frame, uint8_t buffer[], size_t lenBuffer) {
+    if (frame->frame = S_FRAME){
+        int ret = hdlc_frame_data(frame, NULL, 0, buffer, &lenBuffer);
+        if (ret < 0){
+            printf("err in get_frame: %d\n", ret);
+        }
+    } else {
+        int ret = hdlc_frame_data(frame, &client->data_i_frame,
+                                  client->len_data_i_frame, buffer, &lenBuffer);
+        if (ret < 0){
+            printf("err in get_frame: %d\n", ret);
+        }
+    }
+
+    return 0;
+}
+
+int hdlc_decode_recived_raw_data(struct Client* client, uint8_t buffer[], size_t len_buffer){
+    hdlc_control_t recv_control;
+    uint8_t recive[len_buffer];
+
+    int ret = hdlc_get_data_with_state(&client->current_state_hdlc, &recv_control, buffer, len_buffer, recive,
+                            &len_buffer);
+
+    if (ret < 0) {
+        return ret;
+    }
+
+    switch (recv_control.frame) {
+        case S_FRAME:
+            client->state = READY_STATE;
+            break;
+        case I_FRAME:
+            break;
+        case S_FRAME_NACK:
+            client->state = DISCONNECTING;
+            client->frame_rej.seq_no = 0;
+            client->frame_rej.frame = S_FRAME_NACK;
+            break;
+    }
+
+    client->connecting_frame_timeout = connecting_frame_timeout_bf;
+    return 0;
+}
+
+int hdlc_timeout_handler(struct Client* client, int delta_time){
+    client->connecting_frame_timeout -= delta_time;
+
+    if (client->connecting_frame_timeout <= 0){
+        return ERR_FRAME_TIME_OUT;
+    }
+}

hdlc/client.h

@@ -0,0 +1,41 @@
+#ifndef CLIENT_H
+#define CLIENT_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "hdlc.h"
+
+enum HDLCState {
+    UNINITIALIZED_STATE = 0,  // состояние до инцилизации
+    IDLE_STATE, // Состояние ожидания начала
+    READY_STATE, // Состояние принятия
+    CONNECTING, // состояние соединения
+    DISCONNECTING, // состояния отключения
+    RECIVING // состояние приема и отправки
+};
+
+//
+
+struct Client{
+    enum HDLCState state;
+    int connecting_frame_timeout; //-1
+    hdlc_state_t current_state_hdlc;
+    hdlc_control_t frameS;
+    hdlc_control_t frameI;
+    uint8_t data_i_frame;
+    size_t len_data_i_frame;
+//    hdlc_control_t frame3;
+//    hdlc_control_t frame4;
+    hdlc_control_t frame_rej;
+};
+
+//название функций
+void init_hdlc_client(struct Client* client, int connecting_frame_timeout);
+void connect(struct Client* client, hdlc_control_t* frame);
+int send_data(struct Client* client, hdlc_control_t* frame, uint8_t* data, size_t data_len);
+int hdlc_get_raw_frame(struct Client *client, hdlc_control_t* frame, uint8_t buffer[], size_t lenBuffer);
+//принимает буффер с уарта
+int hdlc_decode_recived_raw_data(struct Client* client, uint8_t buffer[], size_t len_buffer);
+int hdlc_timeout_handler(struct Client* client, int delta_time);
+
+#endif //CLIENT_H

hdlc/fcs.c

@@ -0,0 +1,41 @@
+#include "fcs.h"
+
+/*
+ *    CRC-Type:     CRC16 CCIT
+ *    Polynomial:   0x1021 (x^16+x^12+x^5+1)
+ *    Lookup Table: Reflected
+ */
+static const unsigned short fcstab[256] = {
+        0x0000, 0x1189, 0x2312, 0x329b,
+        0x4624, 0x57ad, 0x6536, 0x74bf, 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c,
+        0xdbe5, 0xe97e, 0xf8f7, 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c,
+        0x75b7, 0x643e, 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff,
+        0xe876, 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
+        0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, 0x3183,
+        0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, 0xbdcb, 0xac42,
+        0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, 0x4204, 0x538d, 0x6116,
+        0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, 0xce4c, 0xdfc5, 0xed5e, 0xfcd7,
+        0x8868, 0x99e1, 0xab7a, 0xbaf3, 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1,
+        0x0528, 0x37b3, 0x263a, 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960,
+        0xbbfb, 0xaa72, 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630,
+        0x17b9, 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
+        0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, 0xffcf,
+        0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, 0x8408, 0x9581,
+        0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, 0x0840, 0x19c9, 0x2b52,
+        0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, 0x9489, 0x8500, 0xb79b, 0xa612,
+        0xd2ad, 0xc324, 0xf1bf, 0xe036, 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5,
+        0x4f6c, 0x7df7, 0x6c7e, 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7,
+        0xc03c, 0xd1b5, 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74,
+        0x5dfd, 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
+        0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, 0xc60c,
+        0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, 0x4a44, 0x5bcd,
+        0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, 0xd68d, 0xc704, 0xf59f,
+        0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, 0x5ac5, 0x4b4c, 0x79d7, 0x685e,
+        0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a,
+        0xb0a3, 0x8238, 0x93b1, 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb,
+        0x0e70, 0x1ff9, 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9,
+        0x8330, 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 };
+
+FCS_SIZE calc_fcs(FCS_SIZE fcs, unsigned char value) {
+    return (fcs >> 8) ^ fcstab[(fcs ^ value) & 0xff];
+}

hdlc/fcs.h

@@ -0,0 +1,18 @@
+#ifndef FCS_H
+#define FCS_H
+
+#define FCS_INIT_VALUE 0xFFFF /* FCS initialization value. */
+#define FCS_GOOD_VALUE 0xF0B8 /* FCS value for valid frames. */
+#define FCS_INVERT_MASK 0xFFFF /* Invert the FCS value accordingly to the specification */
+#define FCS_SIZE unsigned short
+
+/**
+ * Calculates a new FCS based on the current value and value of data.
+ *
+ * @param fcs Current FCS value
+ * @param value The value to be added
+ * @returns Calculated FCS value
+ */
+FCS_SIZE calc_fcs(FCS_SIZE fcs, unsigned char value);
+
+#endif

hdlc/hdlc.c

@@ -0,0 +1,261 @@
+#include "hdlc.h"
+
+// HDLC Control field bit positions
+#define HDLC_CONTROL_S_OR_U_FRAME_BIT 0
+#define HDLC_CONTROL_SEND_SEQ_NO_BIT 1
+#define HDLC_CONTROL_S_FRAME_TYPE_BIT 2
+#define HDLC_CONTROL_POLL_BIT 4
+#define HDLC_CONTROL_RECV_SEQ_NO_BIT 5
+
+// HDLC Control type definitions
+#define HDLC_CONTROL_TYPE_RECEIVE_READY 0
+#define HDLC_CONTROL_TYPE_RECEIVE_NOT_READY 1
+#define HDLC_CONTROL_TYPE_REJECT 2
+#define HDLC_CONTROL_TYPE_SELECTIVE_REJECT 3
+
+static hdlc_state_t hdlc_state = {
+        .control_escape = 0,
+        .fcs = FCS_INIT_VALUE,
+        .start_index = -1,
+        .end_index = -1,
+        .src_index = 0,
+        .dest_index = 0,
+};
+
+int hdlc_set_state(hdlc_state_t *state) {
+    if (!state) {
+        return -EINVAL;
+    }
+
+    hdlc_state = *state;
+    return 0;
+}
+
+
+int hdlc_get_state(hdlc_state_t *state) {
+    if (!state) {
+        return -EINVAL;
+    }
+
+    *state = hdlc_state;
+    return 0;
+}
+
+void hdlc_escape_value(char value, char *dest, int *dest_index) {
+    // Check and escape the value if needed
+    if ((value == HDLC_FLAG_SEQUENCE) || (value == HDLC_CONTROL_ESCAPE)) {
+        dest[(*dest_index)++] = HDLC_CONTROL_ESCAPE;
+        value ^= 0x20;
+    }
+
+    // Add the value to the destination buffer and increment destination index
+    dest[(*dest_index)++] = value;
+}
+
+hdlc_control_t hdlc_get_control_type(unsigned char control) {
+    hdlc_control_t value;
+
+    // Check if the frame is a S-frame (or U-frame)
+    if (control & (1 << HDLC_CONTROL_S_OR_U_FRAME_BIT)) {
+        // Check if S-frame type is a Receive Ready (ACK)
+        if (((control >> HDLC_CONTROL_S_FRAME_TYPE_BIT) & 0x3)
+            == HDLC_CONTROL_TYPE_RECEIVE_READY) {
+            value.frame = S_FRAME;
+        } else {
+            // Assume it is an NACK since Receive Not Ready, Selective Reject and U-frames are not supported
+            value.frame = S_FRAME_NACK;
+        }
+
+        // Add the receive sequence number from the S-frame (or U-frame)
+        value.seq_no = (control >> HDLC_CONTROL_RECV_SEQ_NO_BIT);
+    } else {
+        // It must be an I-frame so add the send sequence number (receive sequence number is not used)
+        value.frame = I_FRAME;
+        value.seq_no = (control >> HDLC_CONTROL_SEND_SEQ_NO_BIT);
+    }
+
+    return value;
+}
+
+unsigned char hdlc_frame_control_type(hdlc_control_t *control) {
+    unsigned char value = 0;
+
+    switch (control->frame) {
+        case I_FRAME:
+            // Create the HDLC I-frame control byte with Poll bit set
+            value |= (control->seq_no << HDLC_CONTROL_SEND_SEQ_NO_BIT);
+            value |= (1 << HDLC_CONTROL_POLL_BIT);
+            break;
+        case S_FRAME:
+            // Create the HDLC Receive Ready S-frame control byte with Poll bit cleared
+            value |= (control->seq_no << HDLC_CONTROL_RECV_SEQ_NO_BIT);
+            value |= (1 << HDLC_CONTROL_S_OR_U_FRAME_BIT);
+            break;
+        case S_FRAME_NACK:
+            // Create the HDLC Receive Ready S-frame control byte with Poll bit cleared
+            value |= (control->seq_no << HDLC_CONTROL_RECV_SEQ_NO_BIT);
+            value |= (HDLC_CONTROL_TYPE_REJECT << HDLC_CONTROL_S_FRAME_TYPE_BIT);
+            value |= (1 << HDLC_CONTROL_S_OR_U_FRAME_BIT);
+            break;
+    }
+
+    return value;
+}
+
+void hdlc_get_data_reset() {
+    hdlc_get_data_reset_with_state(&hdlc_state);
+}
+
+void hdlc_get_data_reset_with_state(hdlc_state_t *state) {
+    state->fcs = FCS_INIT_VALUE;
+    state->start_index = state->end_index = -1;
+    state->src_index = state->dest_index = 0;
+    state->control_escape = 0;
+}
+
+//int hdlc_get_data(hdlc_control_t *control, const char *src,
+//                    unsigned int src_len, char *dest, unsigned int *dest_len)
+int hdlc_get_data(hdlc_control_t *control, uint8_t *src,
+                  size_t src_len, uint8_t *dest, size_t *dest_len){
+    return hdlc_get_data_with_state(&hdlc_state, control, src, src_len, dest, dest_len);
+}
+
+//int hdlc_get_data_with_state(hdlc_state_t *state, hdlc_control_t *control, const char *src,
+//                               unsigned int src_len, char *dest, unsigned int *dest_len)
+int hdlc_get_data_with_state(hdlc_state_t *state, hdlc_control_t *control, uint8_t *src,
+                             size_t src_len, uint8_t *dest, size_t *dest_len){
+    int ret;
+    char value;
+    unsigned int i;
+
+    // Make sure that all parameters are valid
+    if (!state || !control || !src || !dest || !dest_len) {
+        return -EINVAL;
+    }
+
+    // Run through the data bytes
+    for (i = 0; i < src_len; i++) {
+        // First find the start flag sequence
+        if (state->start_index < 0) {
+            if (src[i] == HDLC_FLAG_SEQUENCE) {
+                // Check if an additional flag sequence byte is present
+                if ((i < (src_len - 1)) && (src[i + 1] == HDLC_FLAG_SEQUENCE)) {
+                    // Just loop again to silently discard it (accordingly to HDLC)
+                    continue;
+                }
+
+                state->start_index = state->src_index;
+            }
+        } else {
+            // Check for end flag sequence
+            if (src[i] == HDLC_FLAG_SEQUENCE) {
+                // Check if an additional flag sequence byte is present or earlier received
+                if (((i < (src_len - 1)) && (src[i + 1] == HDLC_FLAG_SEQUENCE))
+                    || ((state->start_index + 1) == state->src_index)) {
+                    // Just loop again to silently discard it (accordingly to HDLC)
+                    continue;
+                }
+
+                state->end_index = state->src_index;
+                break;
+            } else if (src[i] == HDLC_CONTROL_ESCAPE) {
+                state->control_escape = 1;
+            } else {
+                // Update the value based on any control escape received
+                if (state->control_escape) {
+                    state->control_escape = 0;
+                    value = src[i] ^ 0x20;
+                } else {
+                    value = src[i];
+                }
+
+                // Now update the FCS value
+                state->fcs = calc_fcs(state->fcs, value);
+
+                if (state->src_index == state->start_index + 2) {
+                    // Control field is the second byte after the start flag sequence
+                    *control = hdlc_get_control_type(value);
+                } else if (state->src_index > (state->start_index + 2)) {
+                    // Start adding the data values after the Control field to the buffer
+                    dest[state->dest_index++] = value;
+                }
+            }
+        }
+        state->src_index++;
+    }
+
+    // Check for invalid frame (no start or end flag sequence)
+    if ((state->start_index < 0) || (state->end_index < 0)) {
+        // Return no message and make sure destination length is 0
+        *dest_len = 0;
+        ret = -ENOMSG;
+    } else {
+        // A frame is at least 4 bytes in size and has a valid FCS value
+        if ((state->end_index < (state->start_index + 4))
+            || (state->fcs != FCS_GOOD_VALUE)) {
+            // Return FCS error and indicate that data up to end flag sequence in buffer should be discarded
+            *dest_len = i;
+            ret = -EIO;
+        } else {
+            // Return success and indicate that data up to end flag sequence in buffer should be discarded
+            *dest_len = state->dest_index - sizeof(state->fcs);
+            ret = i;
+        }
+
+        // Reset values for next frame
+        hdlc_get_data_reset_with_state(state);
+    }
+
+    return ret;
+}
+
+//int hdlc_frame_data(hdlc_control_t *control, const char *src,
+//                      unsigned int src_len, char *dest, unsigned int *dest_len)
+int hdlc_frame_data(hdlc_control_t *control, uint8_t *src,
+                    size_t src_len, uint8_t *dest, size_t *dest_len){
+    unsigned int i;
+    int dest_index = 0;
+    unsigned char value = 0;
+    FCS_SIZE fcs = FCS_INIT_VALUE;
+
+    // Make sure that all parameters are valid
+    if (!control || (!src && (src_len > 0)) || !dest || !dest_len) {
+        return -EINVAL;
+    }
+
+    // Start by adding the start flag sequence
+    dest[dest_index++] = HDLC_FLAG_SEQUENCE;
+
+    // Add the all-station address from HDLC (broadcast)
+    fcs = calc_fcs(fcs, HDLC_ALL_STATION_ADDR);
+    hdlc_escape_value(HDLC_ALL_STATION_ADDR, dest, &dest_index);
+
+    // Add the framed control field value
+    value = hdlc_frame_control_type(control);
+    fcs = calc_fcs(fcs, value);
+    hdlc_escape_value(value, dest, &dest_index);
+
+    // Only DATA frames should contain data
+    if (control->frame == I_FRAME) {
+        // Calculate FCS and escape data
+        for (i = 0; i < src_len; i++) {
+            fcs = calc_fcs(fcs, src[i]);
+            hdlc_escape_value(src[i], dest, &dest_index);
+        }
+    }
+
+    // Invert the FCS value accordingly to the specification
+    fcs ^= FCS_INVERT_MASK;
+
+    // Run through the FCS bytes and escape the values
+    for (i = 0; i < sizeof(fcs); i++) {
+        value = ((fcs >> (8 * i)) & 0xFF);
+        hdlc_escape_value(value, dest, &dest_index);
+    }
+
+    // Add end flag sequence and update length of frame
+    dest[dest_index++] = HDLC_FLAG_SEQUENCE;
+    *dest_len = dest_index;
+
+    return 0;
+}

hdlc/hdlc.h

@@ -0,0 +1,126 @@
+//
+// Created by 79513 on 15.12.2023.
+//
+
+#ifndef HDLC_H
+#define HDLC_H
+
+#include "fcs.h"
+#include <errno.h>
+#include "stdint.h"
+
+/** HDLC start/end flag sequence */
+#define HDLC_FLAG_SEQUENCE 0x7E
+
+/** HDLC control escape value */
+#define HDLC_CONTROL_ESCAPE 0x7D
+
+/** HDLC all station address */
+#define HDLC_ALL_STATION_ADDR 0xFF
+
+/** Supported HDLC frame types */
+typedef enum {
+    I_FRAME,
+    S_FRAME,
+    S_FRAME_NACK,
+} hdlc_frame_t;
+
+/** Control field information */
+typedef struct {
+    hdlc_frame_t frame;
+    unsigned char seq_no :3;
+} hdlc_control_t;
+
+/** Variables used in hdlc_get_data and hdlc_get_data_with_state
+ * to keep track of received buffers
+ */
+typedef struct {
+    char control_escape;
+    FCS_SIZE fcs;
+    int start_index;
+    int end_index;
+    int src_index;
+    int dest_index;
+} hdlc_state_t;
+
+/**
+ * Set the hdlc state
+ *
+ * @param[in] state The new hdlc state to be used
+ * @retval 0 Success
+ * @retval -EINVAL Invalid parameter
+ */
+int hdlc_set_state(hdlc_state_t *state);
+
+/**
+ * Get current hdlc state
+ *
+ * @param[out] state Current hdlc state
+ * @retval 0 Success
+ * @retval -EINVAL Invalid parameter
+ */
+int hdlc_get_state(hdlc_state_t *state);
+
+/**
+ * Retrieves data from specified buffer containing the HDLC frame. Frames can be
+ * parsed from multiple buffers e.g. when received via UART.
+ *
+ * @param[out] control Control field structure with frame type and sequence number
+ * @param[in] src Source buffer with frame
+ * @param[in] src_len Source buffer length
+ * @param[out] dest Destination buffer (should be able to contain max frame size)
+ * @param[out] dest_len Destination buffer length
+ * @retval >=0 Success (size of returned value should be discarded from source buffer)
+ * @retval -EINVAL Invalid parameter
+ * @retval -ENOMSG Invalid message
+ * @retval -EIO Invalid FCS (size of dest_len should be discarded from source buffer)
+ *
+ * @see hdlc_get_data_with_state
+ */
+int hdlc_get_data(hdlc_control_t *control, uint8_t *src,
+                    size_t src_len, uint8_t *dest, size_t *dest_len);
+
+/**
+ * Retrieves data from specified buffer containing the HDLC frame. Frames can be
+ * parsed from multiple buffers e.g. when received via UART.
+ *
+ * This function is a variation of @ref hdlc_get_data
+ * The difference is only in first argument: hdlc_state_t *state
+ * Data under that pointer is used to keep track of internal buffers.
+ *
+ * @see hdlc_get_data
+ */
+int hdlc_get_data_with_state(hdlc_state_t *state, hdlc_control_t *control, uint8_t *src,
+                             size_t src_len, uint8_t *dest, size_t *dest_len);
+
+/**
+ * Resets values used in yahdlc_get_data function to keep track of received buffers
+ */
+void hdlc_get_data_reset();
+
+/**
+ * This is a variation of @ref hdlc_get_data_reset
+ * Resets state values that are under the pointer provided as argument
+ *
+ * This function need to be called before the first call to hdlc_get_data_with_state
+ * when custom state storage is used.
+ *
+ * @see hdlc_get_data_reset
+ */
+void hdlc_get_data_reset_with_state(hdlc_state_t *state);
+
+/**
+ * Creates HDLC frame with specified data buffer.
+ *
+ * @param[in] control Control field structure with frame type and sequence number
+ * @param[in] src Source buffer with data
+ * @param[in] src_len Source buffer length
+ * @param[out] dest Destination buffer (should be bigger than source buffer)
+ * @param[out] dest_len Destination buffer length
+ * @retval 0 Success
+ * @retval -EINVAL Invalid parameter
+ */
+int hdlc_frame_data(hdlc_control_t *control, uint8_t *src,
+                      size_t src_len, uint8_t *dest, size_t *dest_len);
+
+#endif //HDLC_H

hdlc/main.c

@@ -0,0 +1,179 @@
+//#include "hdlc.h"
+#include "stdio.h"
+#include "client.h"
+#include <stdlib.h>
+#include <inttypes.h>
+
+int main(){
+    struct Client hdlc;
+    init_hdlc_client(&hdlc, 200);
+    hdlc_control_t frame;
+    connect(&hdlc, &frame);
+    uint8_t buffer_for_ex[25];
+    uint8_t fake_buffer[2];
+    hdlc_get_raw_frame(&hdlc, &frame, buffer_for_ex, sizeof(buffer_for_ex));
+
+    for (int i = 0; i < 200; i++){
+        int z = hdlc_timeout_handler(&hdlc, 1);
+        if (z < 0){
+            printf("%d\n", z);
+        }
+        hdlc_decode_recived_raw_data(&hdlc, fake_buffer, sizeof(fake_buffer));
+    }
+
+    hdlc_get_raw_frame(&hdlc, &frame, buffer_for_ex, sizeof(buffer_for_ex));
+    int i = hdlc_decode_recived_raw_data(&hdlc, buffer_for_ex, sizeof(buffer_for_ex));
+    printf("%d\n", i);
+
+    hdlc_control_t frame_data;
+    uint8_t data = 003;
+    send_data(&hdlc, &frame_data, &data, sizeof(data));
+    uint8_t buffer_for_ex_data[128];
+
+    hdlc_get_raw_frame(&hdlc, &frame_data, buffer_for_ex_data, sizeof(buffer_for_ex_data));
+
+    i = hdlc_decode_recived_raw_data(&hdlc, buffer_for_ex_data, sizeof(buffer_for_ex_data));
+    printf("%d\n", i);
+
+
+
+//    uint8_t send[64];
+//    uint8_t buffer[134];
+//    for (int i = 0; i < sizeof(send); i++) {
+//        send[i] = (uint8_t) (rand() % 0x70);
+//    }
+//    send_data(&hdlc, send, sizeof(send_data));
+//    //get_frame(&hdlc, buffer, sizeof(buffer), send_data, sizeof(send_data));
+//
+//    hdlc_get_raw_data(&hdlc, buffer, sizeof(buffer));
+
+    // test 1
+
+//    int ret;
+//    uint8_t frame_data[8], recv_data[8];
+//    size_t i, frame_length = 0, recv_length = 0;
+//    hdlc_control_t control_send, control_recv;
+
+//    // Run through the supported sequence numbers (3-bit)
+//    for (i = 0; i <= 7; i++) {
+//        // Initialize the control field structure with frame type and sequence number
+//        control_send.frame = HDLC_FRAME_ACK;
+//        control_send.seq_no = i;
+//
+//        // Create an empty frame with the control field information
+//        ret = hdlc_frame_data(&control_send, NULL, 0, frame_data, &frame_length);
+//
+//        // Get the data from the frame
+//        ret = hdlc_get_data(&control_recv, frame_data, frame_length, recv_data,
+//                              &recv_length);
+//
+//        // Result should be frame_length minus start flag to be discarded and no bytes received
+//        if(ret != (int )frame_length - 1){
+//            printf("err");
+//        }
+//    }
+//    if (recv_length != 0){
+//        printf("err2");
+//    }
+//
+//    if (control_send.frame != control_recv.frame){
+//        printf("err3");
+//    }
+//
+//    if (control_send.seq_no != control_recv.seq_no){
+//        printf("err4");
+//    }
+
+    // test 2
+
+    // Run through the supported sequence numbers (3-bit)
+//    for (i = 0; i <= 7; i++) {
+//        // Initialize the control field structure with frame type and sequence number
+//        control_send.frame = HDLC_FRAME_DATA;
+//        control_send.seq_no = i;
+//
+//        char* input = "311";
+//        uint8_t data = (uint8_t)atoi(input);
+//
+//        // Create an empty frame with the control field information
+//        ret = hdlc_frame_data(&control_send, &data, 3, frame_data, &frame_length);
+//        if (ret != 0){
+//            printf("err123\n");
+//        }
+//
+//        // Get the data from the frame
+//        ret = hdlc_get_data(&control_recv, frame_data, frame_length, recv_data,
+//                            &recv_length);
+//
+//        // Result should be frame_length minus start flag to be discarded and no bytes received
+//        if(ret != (int )frame_length - 1){
+//            printf("err333\n");
+//        }
+//        if (recv_length != 0){
+//            printf("err2\n");
+//        }
+//
+//        // Verify the control field information
+//        if (control_send.frame != control_recv.frame){
+//            printf("err3\n");
+//        }
+//
+//        if (control_send.seq_no != control_recv.seq_no){
+//            printf("err4\n");
+//        }
+//    }
+
+//    int ret;
+//    hdlc_control_t control;
+//    uint8_t send_data[512], frame_data[530], recv_data[530];
+//    size_t i, frame_length = 0, recv_length = 0, buf_length = 16;
+//
+//    // Initialize data to be send with random values (up to 0x70 to keep below the values to be escaped)
+//    for (i = 0; i < sizeof(send_data); i++) {
+//        send_data[i] = (uint8_t) (rand() % 0x70);
+//    }
+//
+//    // Initialize control field structure and create frame
+//    control.frame = HDLC_FRAME_DATA;
+//    ret = hdlc_frame_data(&control, send_data, sizeof(send_data), frame_data,
+//                            &frame_length);
+//
+//    // Check that frame length is maximum 2 bytes larger than data due to escape of FCS value
+//    if(frame_length >= ((sizeof(send_data) + 6) + 2)){
+//        printf("1");
+//    }
+//    if(ret != 0){
+//        printf("2");
+//    }
+//
+//    // Run though the different buffers (simulating decode of buffers from UART)
+//    for (i = 0; i <= sizeof(send_data); i += buf_length) {
+//        // Decode the data
+//        ret = hdlc_get_data(&control, &frame_data[i], buf_length, recv_data,
+//                              &recv_length);
+//
+//        printf("%zu: %s\n", i, recv_data);
+//
+//        if (i < sizeof(send_data)) {
+//            // All chunks until the last should return no message and zero length
+//            if (ret != -ENOMSG){
+//                printf("3");
+//            }
+//            if (recv_length != 0){
+//                printf("1231");
+//            }
+//        } else {
+//            if (ret > 7){
+//                printf("332");
+//            }
+//            if (recv_length != sizeof(send_data)){
+//                printf("88888");
+//            }
+//            // The last chunk should return max 6 frame bytes - 1 start flag sequence byte + 2 byte for the possible
+//            // escaped FCS = 7 bytes
+////            BOOST_CHECK(ret <= 7);
+////            BOOST_CHECK_EQUAL(recv_length, sizeof(send_data));
+//            //printf("5");
+//        }
+//    }
+}

hdlc_frame.c

@@ -1,108 +0,0 @@
-#include "hdlc_frame.h"
-
-#include <string.h>
-
-#define START_FLAG 0x7E
-#define END_FLAG 0x7E
-#define ESCAPE_FLAG 0x7D
-#define ESCAPE_XOR 0x20
-
-void init_HDLCFrame(HDLCFrame* frame, uint8_t address, uint8_t control, uint8_t* data, size_t data_length) {
-    frame->address = address;
-    frame->control = control;
-    frame->data = data;
-    frame->data_length = data_length;
-}
-
-uint16_t calculate_fcs(const HDLCFrame *frame, size_t i) {
-    uint16_t fcs = 0xFFFF;
-
-    uint8_t data_bytes[2 + frame->data_length];
-    data_bytes[0] = frame->address;
-    data_bytes[1] = frame->control;
-    memcpy(data_bytes + 2, frame->data, frame->data_length);
-
-    for (size_t i = 0; i < frame->data_length + 2; i++) {
-        uint8_t byte = data_bytes[i];
-        fcs = (fcs >> 8) ^ (fcs << 8) ^ byte;
-        fcs &= 0xFFFF;
-    }
-
-    return fcs;
-}
-
-void create_frame(const HDLCFrame* frame, uint8_t* result) {
-    size_t index = 0;
-
-    result[index++] = START_FLAG;
-    result[index++] = frame->address;
-    result[index++] = frame->control;
-
-    if (frame->data != NULL) {
-        for (size_t i = 0; i < frame->data_length; i++) {
-            uint8_t byte = frame->data[i];
-            if (byte == START_FLAG || byte == END_FLAG || byte == ESCAPE_FLAG) {
-                result[index++] = ESCAPE_FLAG;
-                result[index++] = byte ^ ESCAPE_XOR;
-            } else {
-                result[index++] = byte;
-            }
-        }
-    }
-
-    uint16_t fcs = calculate_fcs(frame, 0);
-    result[index++] = fcs & 0xFF;
-    result[index++] = (fcs >> 8) & 0xFF;
-    result[index++] = END_FLAG;
-}
-
-void init_IFrame(IFrame* frame, uint8_t address, uint8_t receive_sequence_number, uint8_t poll_final,
-                 uint8_t send_sequence_number, uint8_t* data, size_t data_length) {
-    init_HDLCFrame(&frame->base, address,
-                   ((receive_sequence_number & 0b111) << 6) | ((poll_final & 0b1) << 4) |
-                   ((send_sequence_number & 0b111) << 1) | 0,
-                   data, data_length);
-    frame->receive_sequence_number = receive_sequence_number;
-    frame->poll_final = poll_final;
-    frame->send_sequence_number = send_sequence_number;
-}
-
-void init_SFrame(SFrame* frame, uint8_t address, uint8_t receive_sequence_number, uint8_t poll_final,
-                 const char* frame_type) {
-    uint8_t frame_type_value;
-    if (strcmp(frame_type, "RR") == 0) {
-        frame_type_value = 0;
-    } else if (strcmp(frame_type, "RNR") == 0) {
-        frame_type_value = 1;
-    } else if (strcmp(frame_type, "REJ") == 0) {
-        frame_type_value = 2;
-    } else if (strcmp(frame_type, "SREJ") == 0) {
-        frame_type_value = 3;
-    } else {
-        // Handle error
-        return;
-    }
-
-    init_HDLCFrame(&frame->base, address,
-                   ((receive_sequence_number & 0b111) << 6) | ((poll_final & 0b1) << 5) |
-                   ((frame_type_value & 0b111) << 2) | 1,
-                   NULL, 0);
-    frame->receive_sequence_number = receive_sequence_number;
-    frame->poll_final = poll_final;
-    frame->frame_type = frame_type;
-}
-
-void init_UFrame(UFrame* frame, uint8_t address, uint8_t poll_final, const char* frame_type,
-                 uint8_t* data, size_t data_length) {
-    uint8_t frame_type_value;
-    if (strcmp(frame_type, "BP") == 0) {
-        frame_type_value = 63;
-    } else {
-        // Handle error
-        return;
-    }
-
-    init_HDLCFrame(&frame->base, address, (frame_type_value << 2) | 3, data, data_length);
-    frame->poll_final = poll_final;
-    frame->frame_type = frame_type;
-}

hdlc_frame.h

@@ -1,45 +0,0 @@
-#ifndef HDLC_FRAME_H
-#define HDLC_FRAME_H
-
-#include <stdint.h>
-
-typedef struct {
-    uint8_t address;
-    uint8_t control;
-    uint8_t* data;
-    size_t data_length;
-} HDLCFrame;
-
-void init_HDLCFrame(HDLCFrame* frame, uint8_t address, uint8_t control, uint8_t* data, size_t data_length);
-uint16_t calculate_fcs(const HDLCFrame *frame, size_t i);
-void create_frame(const HDLCFrame* frame, uint8_t* result);
-
-typedef struct {
-    HDLCFrame base;
-    uint8_t receive_sequence_number;
-    uint8_t poll_final;
-    uint8_t send_sequence_number;
-} IFrame;
-
-void init_IFrame(IFrame* frame, uint8_t address, uint8_t receive_sequence_number, uint8_t poll_final,
-                 uint8_t send_sequence_number, uint8_t* data, size_t data_length);
-
-typedef struct {
-    HDLCFrame base;
-    uint8_t receive_sequence_number;
-    uint8_t poll_final;
-    const char* frame_type;
-} SFrame;
-
-void init_SFrame(SFrame* frame, uint8_t address, uint8_t receive_sequence_number, uint8_t poll_final,
-                 const char* frame_type);
-
-typedef struct {
-    HDLCFrame base;
-    uint8_t poll_final;
-    const char* frame_type;
-} UFrame;
-
-void init_UFrame(UFrame* frame, uint8_t address, uint8_t poll_final, const char* frame_type, uint8_t* data, size_t data_length);
-
-#endif

i2c_functions.c

@@ -0,0 +1,24 @@
+#include "i2c_functions.h"
+#include <util/delay.h>
+
+// Здесь можно вставить код инициализации I2C, если требуется
+
+void i2c_delay() {
+    _delay_us(2);
+}
+
+void i2c_start() {
+    // Реализация отправки стартового условия I2C
+}
+
+void i2c_stop() {
+    // Реализация отправки стопового условия I2C
+}
+
+void i2c_send_byte(uint8_t data) {
+    // Реализация отправки одного байта данных по I2C
+}
+
+void i2c_send_bytes(const uint8_t *data, uint8_t length) {
+    // Реализация отправки массива данных (длиной length) по I2C
+}

i2c_functions.h

@@ -0,0 +1,12 @@
+#ifndef I2C_FUNCTIONS_H
+#define I2C_FUNCTIONS_H
+
+#include <stdint.h>
+
+void i2c_delay();
+void i2c_start();
+void i2c_stop();
+void i2c_send_byte(uint8_t data);
+void i2c_send_bytes(const uint8_t *data, uint8_t length);
+
+#endif

lcdpcf8574.cpp

@@ -0,0 +1,316 @@
+#include "MyLCD.h"
+
+// задержеки через асемблер
+#define lcd_e_delay()   __asm__ __volatile__( "rjmp 1f\n 1:" );
+#define lcd_e_toggle()  toggle_e()
+
+
+volatile uint8_t dataport = 0;
+
+static void toggle_e(void);
+
+// сама реализация задержек
+static inline void _delayFourCycles(unsigned int __count)
+{
+    if ( __count == 0 )    
+        __asm__ __volatile__( "rjmp 1f\n 1:" );    
+    else
+        __asm__ __volatile__ (
+    	    "1: sbiw %0,1" "\n\t"                  
+    	    "brne 1b"                              
+    	    : "=w" (__count)
+    	    : "0" (__count)
+    	   );
+}
+
+// тупа оборачиваем функцию в макрос
+#define delay(us)  _delayFourCycles( ( ( 1*(F_CPU/4000) )*us)/1000 )
+
+// переключение пина для начала записи команды
+static void toggle_e(void)
+{
+	pcf8574_setoutputpinhigh(LCD_PCF8574_DEVICEID, LCD_E_PIN);
+    lcd_e_delay();
+    pcf8574_setoutputpinlow(LCD_PCF8574_DEVICEID, LCD_E_PIN);
+}
+
+
+// отправка байта для контроллера LCD
+static void lcd_write(uint8_t data,uint8_t rs) 
+{
+	if (rs) //отправка данных (RS=1, RW=0)
+		dataport |= _BV(LCD_RS_PIN);
+	else // отпрака инструкций(RS=0, RW=0)
+		dataport &= ~_BV(LCD_RS_PIN);
+	dataport &= ~_BV(LCD_RW_PIN);
+	pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
+
+	// отправка старшего полубайта
+    dataport &= ~_BV(LCD_DATA3_PIN);
+    dataport &= ~_BV(LCD_DATA2_PIN);
+    dataport &= ~_BV(LCD_DATA1_PIN);
+    dataport &= ~_BV(LCD_DATA0_PIN);
+	if(data & 0x80) dataport |= _BV(LCD_DATA3_PIN);
+	if(data & 0x40) dataport |= _BV(LCD_DATA2_PIN);
+	if(data & 0x20) dataport |= _BV(LCD_DATA1_PIN);
+	if(data & 0x10) dataport |= _BV(LCD_DATA0_PIN);
+	pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
+	lcd_e_toggle();
+
+	// отправка младшего полубайта
+	dataport &= ~_BV(LCD_DATA3_PIN);
+	dataport &= ~_BV(LCD_DATA2_PIN);
+	dataport &= ~_BV(LCD_DATA1_PIN);
+	dataport &= ~_BV(LCD_DATA0_PIN);
+	if(data & 0x08) dataport |= _BV(LCD_DATA3_PIN);
+	if(data & 0x04) dataport |= _BV(LCD_DATA2_PIN);
+	if(data & 0x02) dataport |= _BV(LCD_DATA1_PIN);
+	if(data & 0x01) dataport |= _BV(LCD_DATA0_PIN);
+	pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
+	lcd_e_toggle();
+
+	// завершаем передачу
+	dataport |= _BV(LCD_DATA0_PIN);
+	dataport |= _BV(LCD_DATA1_PIN);
+	dataport |= _BV(LCD_DATA2_PIN);
+	dataport |= _BV(LCD_DATA3_PIN);
+	pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
+}
+
+// чтение байта
+static uint8_t lcd_read(uint8_t rs) 
+{
+    uint8_t data;
+
+    if (rs) // запись данных (RS=1, RW=0) 
+    	dataport |= _BV(LCD_RS_PIN);
+    else // запись инструкций (RS=0, RW=0)
+    	dataport &= ~_BV(LCD_RS_PIN);
+    dataport |= _BV(LCD_RW_PIN);
+    pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
+
+    pcf8574_setoutputpinhigh(LCD_PCF8574_DEVICEID, LCD_E_PIN);
+	lcd_e_delay();
+	// чтение страшего полубайта
+	data = pcf8574_getoutputpin(LCD_PCF8574_DEVICEID, LCD_DATA0_PIN) << 4;   
+	pcf8574_setoutputpinlow(LCD_PCF8574_DEVICEID, LCD_E_PIN);
+
+	lcd_e_delay();                  
+
+	pcf8574_setoutputpinhigh(LCD_PCF8574_DEVICEID, LCD_E_PIN);
+	lcd_e_delay();
+	// чтение младшего полубайта
+	data |= pcf8574_getoutputpin(LCD_PCF8574_DEVICEID, LCD_DATA0_PIN) &0x0F; 
+	pcf8574_setoutputpinlow(LCD_PCF8574_DEVICEID, LCD_E_PIN);
+
+    return data;
+}
+
+// ждем пока ЖК освободится
+static uint8_t lcd_waitbusy(void)
+
+{
+    register uint8_t c;
+    
+    // ждем
+    while ( (c=lcd_read(0)) & (1<<LCD_BUSY)) {}
+    // задержка
+    delay(2);
+	// получаем адрес
+    return (lcd_read(0)); 
+}
+
+
+// перемещение курсора по строкам
+static inline void lcd_newline(uint8_t pos)
+{
+    register uint8_t addressCounter;
+
+
+#if LCD_LINES==1
+    addressCounter = 0;
+#endif
+#if LCD_LINES==2
+    if ( pos < (LCD_START_LINE2) )
+        addressCounter = LCD_START_LINE2;
+    else
+        addressCounter = LCD_START_LINE1;
+#endif
+#if LCD_LINES==4
+    if ( pos < LCD_START_LINE3 )
+        addressCounter = LCD_START_LINE2;
+    else if ( (pos >= LCD_START_LINE2) && (pos < LCD_START_LINE4) )
+        addressCounter = LCD_START_LINE3;
+    else if ( (pos >= LCD_START_LINE3) && (pos < LCD_START_LINE2) )
+        addressCounter = LCD_START_LINE4;
+    else 
+        addressCounter = LCD_START_LINE1;
+#endif
+    lcd_command((1<<LCD_DDRAM)+addressCounter);
+}
+
+// служебная функция для отправки команд дисплею
+void lcd_command(uint8_t cmd)
+{
+    lcd_waitbusy();
+    lcd_write(cmd,0);
+}
+
+// отправка байта на дисплей
+void lcd_data(uint8_t data)
+{
+    lcd_waitbusy();
+    lcd_write(data,1);
+}
+
+// перемещение курсора по координатам
+void lcd_gotoxy(uint8_t x, uint8_t y)
+{
+#if LCD_LINES==1
+    lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x);
+#endif
+#if LCD_LINES==2
+    if ( y==0 ) 
+        lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x);
+    else
+        lcd_command((1<<LCD_DDRAM)+LCD_START_LINE2+x);
+#endif
+#if LCD_LINES==4
+    if ( y==0 )
+        lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x);
+    else if ( y==1)
+        lcd_command((1<<LCD_DDRAM)+LCD_START_LINE2+x);
+    else if ( y==2)
+        lcd_command((1<<LCD_DDRAM)+LCD_START_LINE3+x);
+    else
+        lcd_command((1<<LCD_DDRAM)+LCD_START_LINE4+x);
+#endif
+}
+
+// тырим координаты
+int lcd_getxy(void)
+{
+    return lcd_waitbusy();
+}
+
+// очистка дисплея
+void lcd_clrscr(void)
+{
+    lcd_command(1<<LCD_CLR);
+}
+
+// вкл и откл подсветки
+void lcd_led(uint8_t onoff)
+{
+	if(onoff)
+		dataport &= ~_BV(LCD_LED_PIN);
+	else
+		dataport |= _BV(LCD_LED_PIN);
+	pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
+}
+
+// курсов в начало координат
+void lcd_home(void)
+{
+    lcd_command(1<<LCD_HOME);
+}
+
+// отображение символа в текущей позиции курсора
+void lcd_putc(char c)
+{
+    uint8_t pos;
+
+    pos = lcd_waitbusy();
+    if (c=='\n')
+    {
+        lcd_newline(pos);
+    }
+    else
+    {
+#if LCD_WRAP_LINES==1
+#if LCD_LINES==1
+        if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) {
+            lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0);
+        }
+#elif LCD_LINES==2
+        if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) {
+            lcd_write((1<<LCD_DDRAM)+LCD_START_LINE2,0);    
+        }else if ( pos == LCD_START_LINE2+LCD_DISP_LENGTH ){
+            lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0);
+        }
+#elif LCD_LINES==4
+        if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) {
+            lcd_write((1<<LCD_DDRAM)+LCD_START_LINE2,0);    
+        }else if ( pos == LCD_START_LINE2+LCD_DISP_LENGTH ) {
+            lcd_write((1<<LCD_DDRAM)+LCD_START_LINE3,0);
+        }else if ( pos == LCD_START_LINE3+LCD_DISP_LENGTH ) {
+            lcd_write((1<<LCD_DDRAM)+LCD_START_LINE4,0);
+        }else if ( pos == LCD_START_LINE4+LCD_DISP_LENGTH ) {
+            lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0);
+        }
+#endif
+        lcd_waitbusy();
+#endif
+        lcd_write(c, 1);
+    }
+}
+
+// вывод строки на дисплей
+void lcd_puts(const char *s)
+{
+    register char c;
+
+    while ( (c = *s++) ) {
+        lcd_putc(c);
+    }
+}
+
+// вывод строки из памяти
+void lcd_puts_p(const char *progmem_s)
+{
+    register char c;
+
+    while ( (c = pgm_read_byte(progmem_s++)) ) {
+        lcd_putc(c);
+    }
+}
+
+// инициализация дисплея
+void lcd_init(uint8_t dispAttr)
+{
+	#if LCD_PCF8574_INIT == 1
+	//инициализация pcf
+	pcf8574_init();
+	#endif
+
+	dataport = 0;
+	pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
+
+    delay(16000);
+
+    // первоначальная запись на ЖК-дисплей — 8 бит
+    dataport |= _BV(LCD_DATA1_PIN);  // _BV(LCD_FUNCTION)>>4;
+    dataport |= _BV(LCD_DATA0_PIN);  // _BV(LCD_FUNCTION_8BIT)>>4;
+    pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
+
+	// дрючим дисплей чтобы он начал работать
+    lcd_e_toggle();
+    delay(4992);
+    lcd_e_toggle();      
+    delay(64);        
+    lcd_e_toggle();      
+    delay(64);          
+
+    // переходим в 4 битный режим
+    dataport &= ~_BV(LCD_DATA0_PIN);
+    pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
+    lcd_e_toggle();
+    delay(64); 
+    
+
+    lcd_command(LCD_FUNCTION_DEFAULT);      // настраиваем кол-во строк
+    lcd_command(LCD_DISP_OFF);              // вырубаем дисплей
+    lcd_clrscr();                           // чистим экран
+    lcd_command(LCD_MODE_DEFAULT);          // запускаемся в стандартном режиме
+    lcd_command(dispAttr);                  // отправляем настройки
+}

lcdpcf8574.h

@@ -0,0 +1,110 @@
+#ifndef LCD_H
+#define LCD_H
+
+#define LCD_PCF8574_INIT 1 //èíèöèàëèçàöèÿ pcf
+
+#define LCD_PCF8574_DEVICEID 0 //id óñò-âà
+#define LCD_FUNCTION_DEFAULT    LCD_FUNCTION_4BIT_2LINES 
+
+// óñòàíîâêà ðåæèìà ââîäà: âêëþ÷åíèå/âûêëþ÷åíèå ñìåùåíèÿ äèñïëåÿ, íàïðàâëåíèå ïåðåìåùåíèÿ êóðñîðà óìåíüøàòü/óâåëè÷èâàòü
+#define LCD_ENTRY_DEC            0x04   // ñìåùåíèå äèñïëåÿ âûêëþ÷åíî, êóðñîð ïåðåìåùàåòñÿ ïî íàêëîíó
+#define LCD_ENTRY_DEC_SHIFT      0x05   // âêëþ÷åíèå ñäâèãà äèñïëåÿ, ïåðåìåùåíèå êóðñîðà ïî íàêëîíó
+#define LCD_ENTRY_INC_           0x06   // ñìåùåíèå äèñïëåÿ âûêëþ÷åíî, âêë. ïåðåìåùåíèå êóðñîðà â íàïðàâëåíèè
+#define LCD_ENTRY_INC_SHIFT      0x07   // âêëþ÷åíèå ñìåùåíèÿ äèñïëåÿ, óâåëè÷åíèå íàïðàâëåíèÿ ïåðåìåùåíèÿ êóðñîðà
+
+// âêëþ÷åíèå/âûêëþ÷åíèå äèñïëåÿ, âêëþ÷åíèå/âûêëþ÷åíèå êóðñîðà, ìèãàþùèé ñèìâîë â ïîçèöèè êóðñîðà
+#define LCD_DISP_OFF             0x08   // äèñïëåé âûêëþ÷åí
+#define LCD_DISP_ON              0x0C   // äèñïëåé âêë, êóðñîð âûêë
+#define LCD_DISP_ON_BLINK        0x0D   // äèñïëåé âêë, êóðñîð âûêë, åñòü ìèãàþùèé ñèìâë
+#define LCD_DISP_ON_CURSOR       0x0E   // äèñïëåé âêë, êóðñîð âêë
+#define LCD_DISP_ON_CURSOR_BLINK 0x0F   // äèñïëåé âêë, êóðñîð âêë, åñòü ìèãàþùèé ñèìâë
+
+// ïåðåìåùåíèå êóðñîðà/ñìåùåíèå äèñïëåÿ
+#define LCD_MOVE_CURSOR_LEFT     0x10   // êóðñîð íàëåâî
+#define LCD_MOVE_CURSOR_RIGHT    0x14   // êóðñîð íàïðàâî
+#define LCD_MOVE_DISP_LEFT       0x18   // ñäâèã âëåâî
+#define LCD_MOVE_DISP_RIGHT      0x1C   // ñäâèã âïðàâî
+
+// íàáîð ôóíêöèé: óñòàíîâêà äëèíû äàííûõ èíòåðôåéñà è êîëè÷åñòâà ñòðîê îòîáðàæåíèÿ
+#define LCD_FUNCTION_4BIT_1LINE  0x20   // 4-áèòíûé èíòåðôåéñ, îäíà ñòðîêà, 5x7 òî÷åê
+#define LCD_FUNCTION_4BIT_2LINES 0x28   // 4-áèòíûé èíòåðôåéñ, äâóõñòðî÷íûé, 5x7 òî÷åê
+#define LCD_FUNCTION_8BIT_1LINE  0x30   // 8-áèòíûé èíòåðôåéñ, îäíà ñòðîêà, 5x7 òî÷åê
+#define LCD_FUNCTION_8BIT_2LINES 0x38   // 8-áèòíûé èíòåðôåéñ, äâóõñòðî÷íûé, 5x7 òî÷åê
+
+#define LCD_LINES           2	  // êîë-âî ñòðîê
+#define LCD_DISP_LENGTH    16     // êîë-âî ñèìâîëîâ â ñòðîêå
+#define LCD_LINE_LENGTH  0x40	  // âíóòðåííÿÿ äëèíà ñòðîêè äèñïëåÿ
+#define LCD_START_LINE1  0x00     // DDRM àäðåñ äëÿ 1 ñòðîêè
+#define LCD_START_LINE2  0x40     // DDRM àäðåñ äëÿ 2 ñòðîêè
+#define LCD_WRAP_LINES      1     // ïåðåíîñ ñòðîêè
+
+
+
+#define LCD_DATA0_PIN    4            // ïèí äëÿ äàííûõ
+#define LCD_DATA1_PIN    5            // ïèí äëÿ äàííûõ
+#define LCD_DATA2_PIN    6            // ïèí äëÿ äàííûõ
+#define LCD_DATA3_PIN    7            // ïèí äëÿ äàííûõ
+#define LCD_RS_PIN       0            // ïèí ëèíèè RS
+#define LCD_RW_PIN       1            // ïèí ëèíèè RW
+#define LCD_E_PIN        2            // ïèí ëèíèè òàêòèðîâàíèÿ
+#define LCD_LED_PIN      3            // ïèí ïîäñâåòêè
+
+
+// Ïîçèöèè áèòîâ ðåãèñòðà êîìàíä HD44780U.
+#define LCD_CLR               0      // îò÷èñòèòü äèñïëåé
+#define LCD_HOME              1      // âåðíóòü êóðñîð äîìîé
+#define LCD_ENTRY_MODE        2      // óñòàíîâêà ðåæèìà ââîäà
+#define LCD_ENTRY_INC         1      // èíêðåìåíò
+#define LCD_ENTRY_SHIFT       0      // âêë ñìåùåíèå
+#define LCD_ON                3      // âêë êóðñîðà
+#define LCD_ON_DISPLAY        2      // âûêë äèñïëåé
+#define LCD_ON_CURSOR         1      // âûêë êóðñîð
+#define LCD_ON_BLINK          0      // ìèãàíèå êóðñîðà
+#define LCD_MOVE              4      // ïåðåäâèæåíèå êóðñîðà
+#define LCD_MOVE_DISP         3      // ïåðåäâèæåíèå êóðñîðà
+#define LCD_MOVE_RIGHT        2      // ïåðåäâèæåíèå êóðñîðà íàïðàâî
+#define LCD_FUNCTION          5      // íàñòðîéêà ôóíêöèé
+#define LCD_FUNCTION_8BIT     4      // 8 áèòíûé ðåæèì
+#define LCD_FUNCTION_2LINES   3      // àêòèâàöèÿ ñòðîê
+#define LCD_FUNCTION_10DOTS   2      // øðèôòû
+#define LCD_CGRAM             6      // óñòàíîâêà àäðåñà CG RAM
+#define LCD_DDRAM             7      // óñòàíîâêà àäðåñà DD RAM
+#define LCD_BUSY              7      // äèñïëåé çàíÿò
+
+// ñòàíäàðòíûé ðåæèì
+#define LCD_MODE_DEFAULT     ((1<<LCD_ENTRY_MODE) | (1<<LCD_ENTRY_INC) )
+
+// èíèöèàëèçàöèÿ äèñïëåÿ
+void lcd_init(uint8_t dispAttr);
+
+// î÷èñòêà äèñïëåÿ
+void lcd_clrscr(void);
+
+// êóðñîâ â íà÷àëî êîîðäèíàò
+void lcd_home(void);
+
+// ïåðåìåùåíèå êóðñîðà ïî êîîðäèíàòàì
+void lcd_gotoxy(uint8_t x, uint8_t y);
+
+// âêë è îòêë ïîäñâåòêè
+void lcd_led(uint8_t onoff);
+
+// îòîáðàæåíèå ñèìâîëà â òåêóùåé ïîçèöèè êóðñîðà
+void lcd_putc(char c);
+
+// âûâîä ñòðîêè íà äèñïëåé
+void lcd_puts(const char *s);
+
+// âûâîä ñòðîêè èç ïàìÿòè
+void lcd_puts_p(const char *progmem_s);
+
+// ñëóæåáíàÿ ôóíêöèÿ äëÿ îòïðàâêè êîìàíä äèñïëåþ
+void lcd_command(uint8_t cmd);
+
+// îòïðàâêà áàéòà íà äèñïëåé
+void lcd_data(uint8_t data);
+
+// ìàêðîñû äëÿ àâòîìàòè÷åñêîãî ñîõðàíåíèÿ ñòðîêîâîé êîíñòàíòû â ïàìÿòè ïðîãðàììû
+#define lcd_puts_P(__s)         lcd_puts_p(PSTR(__s))
+
+#endif

main.c

@@ -1,25 +1,53 @@
-#include <stdint.h>
-#include "config.h"
-#include <avr/io.h>
-#include <util/delay.h>
-#include <avr/interrupt.h>
-#include "uart_hal.h"
-
-
-int main(void)
-{
-	//example
-	uint8_t data = 'A';
-
-	uart_init(9600,0);
-    uart_send_byte(data);
-	sei();
-    while (1) 
-    {
-		if(uart_read_count() > 0){
-			data = uart_read();
-			uart_send_byte(data);
-		}
-
-    }
-}
+#include <avr/io.h>
+#include <util/delay.h>
+#include "display_functions.h"
+
+// Основной код вашего проекта
+
+int main() {
+    // Настройка портов и другие инициализации
+
+    lcd_init(); // Инициализация дисплея
+
+    // Ваш код в функции setup()
+
+    while (1) {
+        unsigned long currentTime = millis(); // Текущее время
+        // Проверяем, прошло ли 500 мс с момента последнего увеличения incrementValue
+        if (currentTime - textCounter.startTime >= 500) {
+            textCounter.incrementValue++; // Увеличиваем incrementValue на 1
+            textCounter.startTime = currentTime; // Обновляем время
+        }
+        
+        DisplayData displayData;
+        strncpy(displayData.topLine, "we are responsible for those who have been tame ", sizeof(displayData.topLine) - 1);
+        displayData.topLine[sizeof(displayData.topLine) - 1] = '\0';
+        displayData.value1 = 500;
+        displayData.value2 = 800;
+        displayData.value3 = 855;
+        // Буферы для заполнения данных
+        char buffer1[17];
+        char buffer2[17];
+        // Заполнение буфера 1
+        fillBuffer1(displayData.topLine, buffer1, sizeof(buffer1), textCounter.incrementValue);
+        // Заполнение буфера 2
+        fillBuffer2(displayData.value1, displayData.value2, displayData.value3, buffer2, sizeof(buffer2));
+        // Создание массива для вывода на дисплей
+        char displayArray[32];
+        strncpy(displayArray, buffer1, 16); // Копирование первых 16 символов из buffer1 в displayArray
+        strncpy(displayArray + 16, buffer2, 16); // Копирование первых 16 символов из buffer2 в displayArray, начиная с позиции 16
+
+        // Вывод данных на экран
+        lcd.setCursor(0, 0);
+        lcd.print(displayArray);
+        lcd.setCursor(0, 1);
+        lcd.print(displayArray + 16); // Вывод второй половины displayArray
+
+        // Ваш код в функции loop() может быть здесь или в другом месте
+
+        // Обновление данных на дисплее
+        lcd_update(&displayData, &textCounter);
+    }
+
+    return 0;
+}

pcf8574.cpp

@@ -0,0 +1,115 @@
+#include "MyLCD.h"
+uint8_t pcf8574_pinstatus[PCF8574_MAXDEVICES];
+
+// инициализация pcf
+void pcf8574_init() {
+	#if PCF8574_I2CINIT == 1
+	// инитим i2c
+	i2c_init();
+	_delay_us(10);
+	#endif
+	uint8_t i = 0;
+	for(i=0; i<PCF8574_MAXDEVICES; i++)
+		pcf8574_pinstatus[i] = 0;
+
+}
+
+// получаем статус вывода
+int8_t pcf8574_getoutput(uint8_t deviceid) {
+	int8_t data = -1;
+	if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES)) {
+		data = pcf8574_pinstatus[deviceid];
+	}
+	return data;
+}
+
+// получаем статус пинов вывода
+int8_t pcf8574_getoutputpin(uint8_t deviceid, uint8_t pin) {
+	int8_t data = -1;
+	if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES) && (pin >= 0 && pin < PCF8574_MAXPINS)) {
+		data = pcf8574_pinstatus[deviceid];
+		data = (data >> pin) & 0b00000001;
+	}
+	return data;
+}
+
+// настройка вывода
+int8_t pcf8574_setoutput(uint8_t deviceid, uint8_t data) {
+	if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES)) {
+		pcf8574_pinstatus[deviceid] = data;
+		i2c_start(((PCF8574_ADDRBASE+deviceid)<<1) | I2C_WRITE);
+		i2c_write(data);
+		i2c_stop();
+		return 0;
+	}
+	return -1;
+}
+
+// установить выходные контакты, заменить фактический статус устройства из pinstart для i2c
+int8_t pcf8574_setoutputpins(uint8_t deviceid, uint8_t pinstart, uint8_t pinlength, int8_t data) {
+	if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES) && (pinstart - pinlength + 1 >= 0 && pinstart - pinlength + 1 >= 0 && pinstart < PCF8574_MAXPINS && pinstart > 0 && pinlength > 0)) {
+	    uint8_t b = 0;
+	    b = pcf8574_pinstatus[deviceid];
+	    uint8_t mask = ((1 << pinlength) - 1) << (pinstart - pinlength + 1);
+		data <<= (pinstart - pinlength + 1);
+		data &= mask;
+		b &= ~(mask);
+		b |= data;
+	    pcf8574_pinstatus[deviceid] = b;
+	    //рестартим
+		i2c_start(((PCF8574_ADDRBASE+deviceid)<<1) | I2C_WRITE);
+		i2c_write(b);
+		i2c_stop();
+		return 0;
+	}
+	return -1;
+}
+
+// настройка пинов вывода
+int8_t pcf8574_setoutputpin(uint8_t deviceid, uint8_t pin, uint8_t data) {
+	if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES) && (pin >= 0 && pin < PCF8574_MAXPINS)) {
+	    uint8_t b = 0;
+	    b = pcf8574_pinstatus[deviceid];
+	    b = (data != 0) ? (b | (1 << pin)) : (b & ~(1 << pin));
+	    pcf8574_pinstatus[deviceid] = b;
+	    //рестартим
+		i2c_start(((PCF8574_ADDRBASE+deviceid)<<1) | I2C_WRITE);
+		i2c_write(b);
+		i2c_stop();
+		return 0;
+	}
+	return -1;
+}
+
+// установка высокого уровня на выходных пинах
+int8_t pcf8574_setoutputpinhigh(uint8_t deviceid, uint8_t pin) {
+	return pcf8574_setoutputpin(deviceid, pin, 1);
+}
+
+// установка низкого уровня на выходных пинах
+int8_t pcf8574_setoutputpinlow(uint8_t deviceid, uint8_t pin) {
+	return pcf8574_setoutputpin(deviceid, pin, 0);
+}
+
+// получение входных данных
+int8_t pcf8574_getinput(uint8_t deviceid) {
+	int8_t data = -1;
+	if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES)) {
+		i2c_start(((PCF8574_ADDRBASE+deviceid)<<1) | I2C_READ);
+		data = ~i2c_readNak();
+		i2c_stop();
+	}
+	return data;
+}
+
+// получение входного контакта (высокий или низкий)
+int8_t pcf8574_getinputpin(uint8_t deviceid, uint8_t pin) {
+	int8_t data = -1;
+	if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES) && (pin >= 0 && pin < PCF8574_MAXPINS)) {
+		data = pcf8574_getinput(deviceid);
+		if(data != -1) {
+			data = (data >> pin) & 0b00000001;
+		}
+	}
+	return data;
+}

pcf8574.h

@@ -0,0 +1,21 @@
+#ifndef PCF8574_H_
+#define PCF8574_H_
+
+#define PCF8574_ADDRBASE (0x27) // àäðåñ óñò-âà
+
+#define PCF8574_I2CINIT 1 // èíèöèàëèçàöèÿ i2c
+
+#define PCF8574_MAXDEVICES 1 // ìàêñ êîë-âî óòðîéñòâ
+#define PCF8574_MAXPINS 8 // ìàêñ êîë-âî ïèíîâ
+
+void pcf8574_init();
+int8_t pcf8574_getoutput(uint8_t deviceid);
+int8_t pcf8574_getoutputpin(uint8_t deviceid, uint8_t pin);
+int8_t pcf8574_setoutput(uint8_t deviceid, uint8_t data);
+int8_t pcf8574_setoutputpins(uint8_t deviceid, uint8_t pinstart, uint8_t pinlength, int8_t data);
+int8_t pcf8574_setoutputpin(uint8_t deviceid, uint8_t pin, uint8_t data);
+int8_t pcf8574_setoutputpinhigh(uint8_t deviceid, uint8_t pin);
+int8_t pcf8574_setoutputpinlow(uint8_t deviceid, uint8_t pin);
+int8_t pcf8574_getinput(uint8_t deviceid);
+int8_t pcf8574_getinputpin(uint8_t deviceid, uint8_t pin);
+#endif

sketch_sep19a.ino

@@ -0,0 +1,83 @@
+#include "MyLCD.h"
+
+struct DisplayData {
+  char topLine[64];
+  int value1;
+  int value2;
+  int value3;
+};
+
+struct TextCounter {
+  unsigned long startTime;
+  int incrementValue;
+};
+
+TextCounter textCounter;
+
+void setup() {
+  lcd_init(LCD_DISP_ON_BLINK);       // инициализация дисплея
+  lcd_home();                        // домой курсор
+  lcd_led(0);                        // вкл подсветки
+  textCounter.startTime = millis();  // Запоминаем время запуска программы
+}
+
+void loop() {
+  unsigned long currentTime = millis();  // Текущее время
+  // Проверяем, прошло ли 500 мс с момента последнего увеличения incrementValue
+  if (currentTime - textCounter.startTime >= 500) {
+    textCounter.incrementValue++;         // Увеличиваем incrementValue на 1
+    textCounter.startTime = currentTime;  // Обновляем время
+  }
+
+  DisplayData displayData;
+  strncpy(displayData.topLine, "we are responsible for those who have been tame ", sizeof(displayData.topLine) - 1);
+  displayData.topLine[sizeof(displayData.topLine) - 1] = '\0';
+  displayData.value1 = 500;
+  displayData.value2 = 800;
+  displayData.value3 = 855;
+
+  // Буферы для заполнения данных
+  char buffer1[17];
+  char buffer2[17];
+
+  // Заполнение буфера 1
+  fillBuffer1(displayData.topLine, buffer1, sizeof(buffer1), textCounter.incrementValue);
+
+  // Заполнение буфера 2
+  fillBuffer2(displayData.value1, displayData.value2, displayData.value3, buffer2, sizeof(buffer2));
+
+  // Создание массива для вывода на дисплей
+  char displayArray[32];
+  strncpy(displayArray, buffer1, 16);       // Копирование первых 16 символов из buffer1 в displayArray
+  strncpy(displayArray + 16, buffer2, 16);  // Копирование первых 16 символов из buffer2 в displayArray, начиная с позиции 16
+
+  // Вывод данных на экран
+  lcd_gotoxy(0, 0);
+  lcd_puts(displayArray);
+
+  lcd_gotoxy(0, 1);
+  lcd_puts(displayArray + 16);  // Вывод второй половины displayArray
+}
+
+void fillBuffer1(const char* source, char* buffer, size_t bufferSize, int incrementValue) {
+  int startIndex = incrementValue % strlen(source);  // Определяем начальный индекс на основе incrementValue
+  int endIndex = startIndex + 16;
+
+  if (endIndex > strlen(source)) {
+    // Если endIndex превышает длину строки source, переносим его на начало строки
+    endIndex = endIndex - strlen(source);
+
+    // Копируем символы с конца строки source
+    strncpy(buffer, source + startIndex, strlen(source) - startIndex);
+
+    // Копируем оставшиеся символы с начала строки source
+    strncat(buffer, source, endIndex);
+  } else {
+    strncpy(buffer, source + startIndex, endIndex - startIndex);
+  }
+  buffer[endIndex - startIndex] = '\0';  // Установка нулевого символа в конце буфера
+}
+
+void fillBuffer2(int value1, int value2, int value3, char* buffer, size_t bufferSize) {
+  snprintf(buffer, bufferSize, "%d.%d.%d", value1, value2, value3);
+}

uart_module.c

@@ -1,82 +0,0 @@
-#include "uart_hal.h"
-
-volatile static uint8_t rx_buffer[RX_BUFFER_SIZE] = {0};
-volatile static uint16_t rx_count = 0;
-volatile static uint8_t uart_tx_busy = 1;
-// кольцевой буффер
-ISR(USART_RX_vect){
-	
-	volatile static uint16_t rx_write_pos = 0;
-	
-	rx_buffer[rx_write_pos] = UDR0;
-	rx_count++;
-	rx_write_pos++;
-	if(rx_write_pos >= RX_BUFFER_SIZE){
-		rx_write_pos = 0;
-	}
-	
-}
-
-
-ISR(USART_TX_vect){
-	uart_tx_busy = 1;
-}
-
-
-void uart_init(uint32_t baud,uint8_t high_speed){
-	
-	uint8_t speed = 16;
-	
-	if(high_speed != 0){
-		speed = 8;
-		UCSR0A |= 1 << U2X0;
-	}
-	
-	baud = (F_CPU/(speed*baud)) - 1;
-	
-	UBRR0H = (baud & 0x0F00) >> 8;
-	UBRR0L = (baud & 0x00FF);
-	
-	UCSR0B |= (1 << TXEN0) | (1 << RXEN0) | (1 << TXCIE0) | (1 << RXCIE0);
-	
-}
-
-
-void uart_send_byte(uint8_t c){
-	while(uart_tx_busy == 0);
-	uart_tx_busy = 0;
-	UDR0 = c;
-}
-
-void uart_send_array(uint8_t *c,uint16_t len){
-	for(uint16_t i = 0; i < len;i++){
-		uart_send_byte(c[i]);
-	}
-}
-
-void uart_send_string(uint8_t *c){
-	uint16_t i = 0;
-	do{
-		uart_send_byte(c[i]);
-		i++;
-		
-	}while(c[i] != '\0');
-	uart_send_byte(c[i]);
-}
-
-uint16_t uart_read_count(void){
-	return rx_count;
-}
-
-uint8_t uart_read(void){
-	static uint16_t rx_read_pos = 0;
-	uint8_t data = 0;
-	
-	data = rx_buffer[rx_read_pos];
-	rx_read_pos++;
-	rx_count--;
-	if(rx_read_pos >= RX_BUFFER_SIZE){
-		rx_read_pos = 0;
-	}
-	return data;
-}

uart_module.h

@@ -1,20 +0,0 @@
-#ifndef UART_HAL_H_
-#define UART_HAL_H_
-
-
-#include <stdint.h>
-#include "config.h"
-#include <avr/io.h>
-#include <util/delay.h>
-#include <avr/interrupt.h>
-
-#define RX_BUFFER_SIZE 128
-
-void uart_init(uint32_t baud,uint8_t high_speed);
-void uart_send_byte(uint8_t c);
-void uart_send_array(uint8_t *c,uint16_t len);
-void uart_send_string(uint8_t *c);
-uint16_t uart_read_count(void);
-uint8_t uart_read(void);
-
-#endif /* UART_HAL_H_ */

пример с библиотеками ардуино.txt

@@ -0,0 +1,55 @@
+#include <Wire.h>
+#include <LiquidCrystal_I2C.h>
+
+LiquidCrystal_I2C lcd(32, 16, 2);
+
+byte MasArray[32] = {
+  78, 69, 71, 82, 32, 77, 65, 78, 68, 65, 82, 73, 78, 33, 33, 33,
+  32, 32, 32, 32, 46, 32, 32, 32, 32, 46, 32, 32, 32, 46, 37, 33
+};
+
+char colum1[17];
+char colum2[17];
+
+unsigned long previousTime = 0;
+const unsigned long interval = 200;
+
+void delay_ms(unsigned long milliseconds) {
+  unsigned long startTime = millis();
+  while (millis() - startTime < milliseconds) {
+    // Wait until the specified time has passed
+  }
+}
+
+void setup() {
+  Serial.begin(9600);
+  lcd.init();
+  lcd.backlight();
+
+  for (int i = 0; i < 32; i++) {
+    if (i < 16) {
+      colum1[i] = (char)MasArray[i];
+    } else {
+      colum2[i - 16] = (char)MasArray[i];
+    }
+  }
+  colum1[16] = '\0';
+  colum2[16] = '\0';
+}
+
+void loop() {
+  unsigned long currentTime = millis();
+
+  if (currentTime - previousTime >= interval) {
+    previousTime = currentTime;
+
+    for (int i = 15; i > 0; i--) {
+      lcd.setCursor(i, 0);
+      lcd.print(colum1);
+      lcd.setCursor(0, 1);
+      lcd.print(colum2);
+      delay_ms(200); // Use the custom delay_ms() function instead of delay()
+      lcd.clear();
+    }
+  }
+}

типо с.txt

@@ -0,0 +1,93 @@
+#include <Wire.h>
+
+#define LCD_ADDRESS 0x27
+#define LCD_ROWS 2
+#define LCD_COLUMNS 16
+
+byte MasArray[32] = {
+78, 69, 71, 82, 32, 77, 65, 78, 68, 65, 82, 73, 78, 33, 33, 33,
+32, 32, 32, 32, 46, 32, 32, 32, 32, 46, 32, 32, 32, 46, 37, 33
+};
+
+char colum1[17];
+char colum2[17];
+
+unsigned long previousTime = 0;
+const unsigned long interval = 200;
+
+void delay_ms(unsigned long milliseconds) {
+unsigned long startTime = millis();
+while (millis() - startTime < milliseconds) {
+// Wait until the specified time has passed
+}
+}
+
+void lcdCommand(uint8_t command) {
+Wire.beginTransmission(LCD_ADDRESS);
+Wire.write(0x00);
+Wire.write(command);
+Wire.endTransmission();
+}
+
+void lcdWrite(uint8_t value) {
+Wire.beginTransmission(LCD_ADDRESS);
+Wire.write(0x40);
+Wire.write(value);
+Wire.endTransmission();
+}
+
+void lcdSetCursor(uint8_t row, uint8_t col) {
+uint8_t row_offsets[] = { 0x00, 0x40 };
+uint8_t offset = row_offsets[row] + col;
+lcdCommand(0x80 | offset);
+}
+
+void lcdClear() {
+lcdCommand(0x01); // Clear display
+delay_ms(2); // Delay for clear display command
+}
+
+void lcdInit() {
+Wire.begin();
+lcdCommand(0x38); // Function set: 8-bit mode, 2 lines, 5x8 font
+lcdCommand(0x0C); // Display control: Display ON, Cursor OFF, Blinking OFF
+lcdClear();
+}
+
+void lcdPrint(const char* str) {
+while (*str) {
+lcdWrite(*str++);
+}
+}
+
+void setup() {
+Serial.begin(9600);
+lcdInit();
+
+for (int i = 0; i < 32; i++) {
+if (i < 16) {
+colum1[i] = (char)MasArray[i];
+} else {
+colum2[i - 16] = (char)MasArray[i];
+}
+}
+colum1[16] = '\0';
+colum2[16] = '\0';
+}
+
+void loop() {
+unsigned long currentTime = millis();
+
+if (currentTime - previousTime >= interval) {
+previousTime = currentTime;
+
+for (int i = 15; i > 0; i--) {
+lcdSetCursor(i, 0);
+lcdPrint(colum1);
+lcdSetCursor(0, 1);
+lcdPrint(colum2);
+delay_ms(200); // Use the custom delay_ms() function instead of delay()
+lcdClear();
+}
+}
+}