diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..2d8ff23 --- /dev/null +++ b/.gitignore @@ -0,0 +1,9 @@ +hdlc1.c +hdlc1.h +hdlc_frame.c +hdlc_frame.h +main1.c +uart.c +uart.h + +!./hdlc \ No newline at end of file diff --git a/.idea/modules.xml b/.idea/modules.xml index 639da93..4922bfe 100644 --- a/.idea/modules.xml +++ b/.idea/modules.xml @@ -2,7 +2,7 @@ - + \ No newline at end of file diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..5aea8e2 --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,6 @@ +cmake_minimum_required(VERSION 3.25) +project(untitled1 C) + +set(CMAKE_C_STANDARD 11) + +add_executable(untitled1 hdlc/fcs.h hdlc/fcs.c hdlc/hdlc.h hdlc/hdlc.c hdlc/main.c hdlc/client.c) diff --git a/client.c b/client.c deleted file mode 100644 index a456c45..0000000 --- a/client.c +++ /dev/null @@ -1,125 +0,0 @@ -#include "client.h" - -#include -#include - -#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 - -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; -} \ No newline at end of file diff --git a/client.h b/client.h deleted file mode 100644 index 0a19d58..0000000 --- a/client.h +++ /dev/null @@ -1,24 +0,0 @@ -#ifndef CLIENT_H -#define CLIENT_H - -#include "hdlc_frame.h" -#include "uart_module.h" -#include -#include // Для использования size_t -#include - -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 diff --git a/hdlc/client.c b/hdlc/client.c new file mode 100644 index 0000000..cc9071f --- /dev/null +++ b/hdlc/client.c @@ -0,0 +1,115 @@ +#include "client.h" +#include "hdlc.h" +#include "stdio.h" +#include "stdbool.h" + +#define CONNECT_FRAME_PERIOD 200 +#define SIZE_DATA_BUFFER 64 +#define COUNT_BUFFERS 4 + +bool FLAG_FILL_BUFFER1 = false; +bool FLAG_FILL_BUFFER2 = false; +bool FLAG_FILL_BUFFER3 = false; +bool FLAG_FILL_BUFFER4 = false; + +#define ERR_INVALID_DATA_SIZE -1 +#define ERR_ALL_BUFFERS_FILL -2 + +struct Client hdlc_client; + +uint8_t buffer_data[COUNT_BUFFERS][SIZE_DATA_BUFFER]; + +struct Client init_hdlc_client(enum HDLCState *state){ + return hdlc_client; +} + +void connect(struct Client* client){ + client->state = CONNECTING; +} + +int send_data(struct Client* client, uint8_t* data, size_t data_len){ + if (data_len > 64){ + return ERR_INVALID_DATA_SIZE; + } + + if (!FLAG_FILL_BUFFER1){ + for(int i = 0; i < SIZE_DATA_BUFFER; i++){ + buffer_data[0][i] = data[i]; + } + + FLAG_FILL_BUFFER1 = true; + } else if (!FLAG_FILL_BUFFER2){ + for(int i = 0; i < SIZE_DATA_BUFFER; i++){ + buffer_data[1][i] = data[i]; + } + + FLAG_FILL_BUFFER2 = true; + } else if (!FLAG_FILL_BUFFER3){ + for(int i = 0; i < SIZE_DATA_BUFFER; i++){ + buffer_data[2][i] = data[i]; + } + + FLAG_FILL_BUFFER3 = true; + } if (!FLAG_FILL_BUFFER4){ + for(int i = 0; i < SIZE_DATA_BUFFER; i++){ + buffer_data[3][i] = data[i]; + } + + FLAG_FILL_BUFFER4 = true; + } else { + return ERR_ALL_BUFFERS_FILL; + } + + client->state = READY_STATE; +}; + +int get_frame(struct Client* client, uint8_t buffer[], size_t lenBuffer){ + hdlc_control_t control_send; + + switch (client->state) { + case CONNECTING: + if (client->connecting_frame_timeout <= 0){ + control_send.frame = HDLC_FRAME_ACK; + control_send.seq_no = 1; + + int ret = hdlc_frame_data(&control_send, NULL, 0, buffer, &lenBuffer); + if (ret < 0){ + printf("err in get_frame ACK: %d\n", ret); + } + + client->connecting_frame_timeout = CONNECT_FRAME_PERIOD; + } + break; + case READY_STATE: + control_send.frame = HDLC_FRAME_DATA; + control_send.seq_no = 1; + int ret = hdlc_frame_data(&control_send, buffer_data[0], SIZE_DATA_BUFFER, buffer, &lenBuffer); + if (ret < 0){ + printf("err in get_frame DATA: %d\n", ret); + } + break; + } + +// Yf + + return 0; +} + +int hdlc_get_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(&recv_control, buffer, len_buffer, recive, + &len_buffer); + if (ret < 0){ + printf("err in get_raw_data: %d\n", ret); + } + if (recv_control.frame == HDLC_FRAME_ACK){ + client->state = IDLE_STATE; + } + return 0; +} + +void hdlc_timeout_handler(struct Client* client, int delta_time){ + client->connecting_frame_timeout -= delta_time; +} \ No newline at end of file diff --git a/hdlc/client.h b/hdlc/client.h new file mode 100644 index 0000000..64b0ba6 --- /dev/null +++ b/hdlc/client.h @@ -0,0 +1,30 @@ +#ifndef CLIENT_H +#define CLIENT_H + +#include +#include + +enum HDLCState { + UNINITIALIZED_STATE = 0, // состояние до инцилизации + IDLE_STATE, // Состояние ожидания начала + READY_STATE, // Состояние принятия + CONNECTING, // состояние соединения + DISCONNECTING, // состояния отключения + RECIVED // состояние приема и отправки +}; + +struct Client{ + enum HDLCState state; + int connecting_frame_timeout; //-1 +}; + +//название функций +struct Client init_hdlc_client(enum HDLCState *state); +void connect(struct Client* client); +int send_data(struct Client* client, uint8_t* data, size_t data_len); +int get_frame(struct Client* client, uint8_t buffer[], size_t lenBuffer); +//принимает буффер с уарта +int hdlc_get_raw_data(struct Client* client, uint8_t buffer[], size_t len_buffer); +void hdlc_timeout_handler(struct Client* client, int delta_time); + +#endif //CLIENT_H diff --git a/hdlc/fcs.c b/hdlc/fcs.c new file mode 100644 index 0000000..6e29cf8 --- /dev/null +++ b/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]; +} \ No newline at end of file diff --git a/hdlc/fcs.h b/hdlc/fcs.h new file mode 100644 index 0000000..6673d40 --- /dev/null +++ b/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 \ No newline at end of file diff --git a/hdlc_frame.c b/hdlc_frame.c deleted file mode 100644 index e7965c6..0000000 --- a/hdlc_frame.c +++ /dev/null @@ -1,108 +0,0 @@ -#include "hdlc_frame.h" - -#include - -#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; -} diff --git a/hdlc_frame.h b/hdlc_frame.h index c12eaf5..23056f3 100644 --- a/hdlc_frame.h +++ b/hdlc_frame.h @@ -2,17 +2,19 @@ #define HDLC_FRAME_H #include +#include typedef struct { uint8_t address; uint8_t control; uint8_t* data; size_t data_length; + int timeout; } 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); +void create_frame(const HDLCFrame* frame, uint8_t* buffer); typedef struct { HDLCFrame base; @@ -31,8 +33,15 @@ typedef struct { const char* frame_type; } SFrame; +enum SFrameType{ + RR, + RNR, + REJ, + SREJ +}; + void init_SFrame(SFrame* frame, uint8_t address, uint8_t receive_sequence_number, uint8_t poll_final, - const char* frame_type); + enum SFrameType frame_type); typedef struct { HDLCFrame base; @@ -42,4 +51,6 @@ typedef struct { void init_UFrame(UFrame* frame, uint8_t address, uint8_t poll_final, const char* frame_type, uint8_t* data, size_t data_length); +bool validate_fcs(const uint8_t* frame, size_t length); + #endif diff --git a/main.c b/main.c deleted file mode 100644 index 93e2b83..0000000 --- a/main.c +++ /dev/null @@ -1,25 +0,0 @@ -#include -#include "config.h" -#include -#include -#include -#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); - } - - } -} \ No newline at end of file diff --git a/uart_module.c b/uart_module.c deleted file mode 100644 index c4cbc2a..0000000 --- a/uart_module.c +++ /dev/null @@ -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; -} \ No newline at end of file diff --git a/uart_module.h b/uart_module.h deleted file mode 100644 index 284a941..0000000 --- a/uart_module.h +++ /dev/null @@ -1,20 +0,0 @@ -#ifndef UART_HAL_H_ -#define UART_HAL_H_ - - -#include -#include "config.h" -#include -#include -#include - -#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_ */ \ No newline at end of file