Updated .gitignore

.gitignore

@@ -3,4 +3,5 @@
 cmake-buid-debug
 
 # Executables
-*.exe
+*.exe
+Debug

calculator.c

@@ -1,187 +1,144 @@
-#include <stdio.h>
-#include <stdlib.h>
+#include "calculator.h"
 
-enum calculator_state {
-		NUMBER_FIRST,
-	NUMBER_SECOND,
-	RESULT
-};
-enum calculator_op {
-	NO_OP,
-	ADD,
-	SUB,
-	DIV,
-	MUL
-};
-struct calculator {
-	// 1 ÷èñëî
-	int num1;
-	// 2 ÷èñëî
-	int num2;
-	// 3 îïåðàöèÿ
-	enum calculator_op operation;
-	// 4 ðåçóëüòàò
-	int result;
-	// 5 ñîñòîÿíèå àòîìàòà
-	enum calculator_state state;
-};
-
-
-
-int main() {
-	struct calculator calc;
-	calc.state = NUMBER_FIRST;
-	calc.operation = NO_OP;
-	calc.num1 = 0;
-	calc.num2 = 0;
-	calc.result = 0;
-	int input;
-	while (1) {
-		scanf("%d", &input);
-		switch (calc.state) {
-			case NUMBER_FIRST:
-			switch (input) {
-				case 0:
-				calc.num1 = (calc.num1 * 10) + 7;
+void handleCalc(struct calculator *calc, int input) {
+	switch (calc->state) {
+		case NUMBER_FIRST:
+		switch (input) {
+			case 0:
+				calc->num1 = (calc->num1 * 10) + 7;
 				break;
-				case 1:
-				calc.num1 = (calc.num1 * 10) + 8;
-				break;
-				case 2:
-				calc.num1 = (calc.num1 * 10) + 9;
-				break;
-				case 3:
-				calc.operation = DIV;
-				calc.state = NUMBER_SECOND;
-				break;
-				case 4:
-				calc.num1 = (calc.num1 * 10) + 4;
-				break;
-				case 5:
-				calc.num1 = (calc.num1 * 10) + 5;
-				break;
-				case 6:
-				calc.num1 = (calc.num1 * 10) + 6;
-				break;
-				case 7:
-				calc.operation = MUL;
-				calc.state = NUMBER_SECOND;
-				break;
-				case 8:
-				calc.num1 = (calc.num1 * 10) + 1;
-				break;
-				case 9:
-				calc.num1 = (calc.num1 * 10) + 2;
-				case 10:
-				calc.num1 = (calc.num1 * 10) + 3;
-				break;
-				case 11:
-				calc.operation = SUB;
-				calc.state = NUMBER_SECOND;
-				break;
-				case 12:
-				calc.num1 = 0;
-				break;
-				case 13:
-				calc.state = NUMBER_FIRST;
-				calc.operation = NO_OP;
-				calc.num1 = 0;
-				calc.num2 = 0;
-				calc.result = 0;
-				break;
-				case 14:
-				break;
-				case 15:
-				calc.operation = ADD;
-				calc.state = NUMBER_SECOND;
-				break;
-			}
-			printf("num1: %d | num2: %d | result: %d | operation: %d | state: %d", calc.num1, calc.num2, calc.result, calc.operation, calc.state);
+			case 1:
+			calc->num1 = (calc->num1 * 10) + 8;
 			break;
-
-			case NUMBER_SECOND:
-			switch (input) {
-				case 0:
-				calc.num2 = (calc.num2 * 10) + 7;
-				break;
-				case 1:
-				calc.num2 = (calc.num2 * 10) + 8;
-				break;
-				case 2:
-				calc.num2 = (calc.num2 * 10) + 9;
-				break;
-				case 3:
-				break;
-				case 4:
-				calc.num2 = (calc.num2 * 10) + 4;
-				break;
-				case 5:
-				calc.num2 = (calc.num2 * 10) + 5;
-				break;
-				case 6:
-				calc.num2 = (calc.num2 * 10) + 6;
-				break;
-				case 7:
-				break;
-				case 8:
-				calc.num2 = (calc.num2 * 10) + 1;
-				break;
-				case 9:
-				calc.num2 = (calc.num2 * 10) + 2;
-				case 10:
-				calc.num2 = (calc.num2 * 10) + 3;
-				break;
-				case 11:
-				break;
-				case 12:
-				calc.num2 = 0;
-				break;
-				case 13:
-				calc.state = NUMBER_FIRST;
-				calc.operation = NO_OP;
-				calc.num1 = 0;
-				calc.num2 = 0;
-				calc.result = 0;
-				break;
-				case 14:
-				switch (calc.operation) {
-					case ADD:
-					calc.result = calc.num1 + calc.num2;
-					calc.state = RESULT;
-					break;
-					case SUB:
-					calc.result = calc.num1 - calc.num2;
-					calc.state = RESULT;
-					break;
-					case MUL:
-					calc.result = calc.num1 * calc.num2;
-					calc.state = RESULT;
-					break;
-					case DIV:
-					calc.result = calc.num1 / calc.num2;
-					calc.state = RESULT;
-					break;
-
-				}
-				break;
-				case 15:
-				break;
-			}
-			printf("num1: %d | num2: %d | result: %d | operation: %d | state: %d", calc.num1, calc.num2, calc.result, calc.operation, calc.state);
+			case 2:
+			calc->num1 = (calc->num1 * 10) + 9;
 			break;
-			case RESULT:
-			switch (input) {
-				case 14:
-				calc.state = NUMBER_FIRST;
-				calc.operation = NO_OP;
-				calc.num1 = 0;
-				calc.num2 = 0;
-				calc.result = 0;
-				printf("num1: %d | num2: %d | result: %d | operation: %d | state: %d", calc.num1, calc.num2, calc.result, calc.operation, calc.state);
-				break;
-			}
+			case 3:
+			calc->operation = DIV;
+			calc->state = NUMBER_SECOND;
+			break;
+			case 4:
+			calc->num1 = (calc->num1 * 10) + 4;
+			break;
+			case 5:
+			calc->num1 = (calc->num1 * 10) + 5;
+			break;
+			case 6:
+			calc->num1 = (calc->num1 * 10) + 6;
+			break;
+			case 7:
+			calc->operation = MUL;
+			calc->state = NUMBER_SECOND;
+			break;
+			case 8:
+			calc->num1 = (calc->num1 * 10) + 1;
+			break;
+			case 9:
+			calc->num1 = (calc->num1 * 10) + 2;
+			break;
+			case 10:
+			calc->num1 = (calc->num1 * 10) + 3;
+			break;
+			case 11:
+			calc->operation = SUB;
+			calc->state = NUMBER_SECOND;
+			break;
+			case 12:
+			calc->num1 = (calc->num1 * 10);
+			break;
+			case 13:
+			clearCalc(calc);
+			break;
+			case 14:
+			break;
+			case 15:
+			calc->operation = ADD;
+			calc->state = NUMBER_SECOND;
 			break;
-
 		}
+		break;
+		case NUMBER_SECOND:
+		switch (input) {
+			case 0:
+			calc->num2 = (calc->num2 * 10) + 7;
+			break;
+			case 1:
+			calc->num2 = (calc->num2 * 10) + 8;
+			break;
+			case 2:
+			calc->num2 = (calc->num2 * 10) + 9;
+			break;
+			case 3:
+			break;
+			case 4:
+			calc->num2 = (calc->num2 * 10) + 4;
+			break;
+			case 5:
+			calc->num2 = (calc->num2 * 10) + 5;
+			break;
+			case 6:
+			calc->num2 = (calc->num2 * 10) + 6;
+			break;
+			case 7:
+			break;
+			case 8:
+			calc->num2 = (calc->num2 * 10) + 1;
+			break;
+			case 9:
+			calc->num2 = (calc->num2 * 10) + 2;
+			break;
+			case 10:
+			calc->num2 = (calc->num2 * 10) + 3;
+			break;
+			case 11:
+			break;
+			case 12:
+			calc->num2 = (calc->num2 * 10);
+			break;
+			case 13:
+			clearCalc(calc);
+			break;
+			case 14:
+			switch (calc->operation) {
+				case ADD:
+				calc->result = calc->num1 + calc->num2;
+				calc->state = RESULT;
+				break;
+				case SUB:
+				calc->result = calc->num1 - calc->num2;
+				calc->state = RESULT;
+				break;
+				case MUL:
+				calc->result = calc->num1 * calc->num2;
+				calc->state = RESULT;
+				break;
+				case DIV:
+				calc->result = calc->num1 / calc->num2;
+				calc->state = RESULT;
+				break;
+			}
+			break;
+			case 15:
+			break;
+		}
+		break;
+		case RESULT:
+		switch (input) {
+			case 14:
+			clearCalc(calc);
+			break;
+			case 13:
+			clearCalc(calc);
+			break;
+		}
+		break;
 	}
+}
+
+void clearCalc(struct calculator *calc) {
+	calc->state = NUMBER_FIRST;
+	calc->operation = NO_OP;
+	calc->num1 = 0;
+	calc->num2 = 0;
+	calc->result = 0;
 }

calculator.h

@@ -0,0 +1,41 @@
+/*
+ * calculator.h
+ *
+ * Created: 29.05.2023 12:01:39
+ *  Author: mrnek
+ */ 
+
+
+#ifndef CALCULATOR_H_
+#define CALCULATOR_H_
+
+enum calculator_state {
+	NUMBER_FIRST,
+	NUMBER_SECOND,
+	RESULT
+};
+enum calculator_op {
+	NO_OP,
+	ADD,
+	SUB,
+	DIV,
+	MUL
+};
+struct calculator {
+	// 1 ÷èñëî
+	long num1;
+	// 2 ÷èñëî
+	long num2;
+	// 3 îïåðàöèÿ
+	enum calculator_op operation;
+	// 4 ðåçóëüòàò
+	long result;
+	// 5 ñîñòîÿíèå àòîìàòà
+	enum calculator_state state;
+};
+
+void clearCalc(struct calculator *calc);
+
+void handleCalc(struct calculator *calc, int input);
+
+#endif /* CALCULATOR_H_ */

func.c

@@ -0,0 +1,72 @@
+/*
+* delay.c
+*
+* Created: 03.06.2023 12:34:55
+*  Author: Admin
+*/
+#include "func.h"
+
+void delay() {
+	for(volatile long i = 0; i < 1000; i++){};
+}
+
+int count_digits(long number) {
+	int count = 0;
+
+	if (number == 0) {
+		return 1;
+	}
+
+	if (number < 0) {
+		number = -number;
+	}
+
+	while (number > 0) {
+		number /= 10;
+		count++;
+	}
+
+	return count;
+}
+
+void split_digits(long number, int* digits, int size) {
+	int digit;
+	int index = 0;
+
+	if (number == 0) {
+		digits[0] = 0;
+		return;
+	}
+
+	if (number < 0) {
+		number = -number;
+	}
+
+	while (number > 0 && index < size) {
+		digit = number % 10;
+		digits[index] = digit;
+		number /= 10;
+		index++;
+	}
+}
+
+static char map(int digit) {
+	if (digit >= 0 && digit <= 9)
+	return digit + 0x09;
+	else
+	return 0x01;
+}
+
+void map_digits(char* arr, int *digits, int size) {
+	int idx = 0;
+	for (int i = size - 1; i >= 0; i--) {
+		arr[idx] = map(digits[i]);
+		idx++;
+	}
+}
+
+void prepare_data(char *arr, int number, int size) {
+	int digits[size];
+	split_digits(number, digits, size);
+	map_digits(arr, digits, size);
+}

func.h

@@ -0,0 +1,13 @@
+/*
+* delay.h
+*
+* Created: 03.06.2023 12:35:06
+*  Author: Admin
+*/
+
+void delay();
+
+void split_digits(long number, int* digits, int size);
+int count_digits(long number);
+void map_digits(char* arr, int *digits, int size);
+void prepare_data(char *arr, int number, int size);

keyboard.c

@@ -9,6 +9,7 @@
 #include <stdio.h>
 #include "keyboard.h"
 #include "timer.h"
+#include "func.h"
 
 #define MASK_PIND 0b11110000
 
@@ -18,7 +19,7 @@ void get_physical_keys(struct key *keys) {
 	uint8_t row;
 	for (int i = 0; i < KEYS_AMOUNT / 4; i++) {
 		PORTC &= ~(1 << i);
-		for(volatile long i = 0; i < 1000; i++){};
+		delay();
 		row = PIND & MASK_PIND;
 		if (row & (1 << 4)) keys[i * 4].physical = false; else keys[i * 4].physical = true;
 		if (row & (1 << 5)) keys[i * 4 + 1].physical = false; else keys[i * 4 + 1].physical = true;

main.c

@@ -5,11 +5,12 @@
 #include "timer.h"
 #include "keyboard.h"
 #include "uart.h"
+#include "spi_master.h"
 
 void setup_registers() {
 	MCUCR &= ~(1 << 4); // PUD
-	MCUCR &= ~(1 << 5); 
-	MCUCR &= ~(1 << 6); 
+	MCUCR &= ~(1 << 5);
+	MCUCR &= ~(1 << 6);
 	MCUCR &= ~(1 << 7);
 	DDRD &= 0x0F;
 	PORTD |= 0xF0;
@@ -20,6 +21,7 @@ void setup_registers() {
 
 void setup() {
 	USART_Init(MYUBRR);
+	SPI_MasterInit();
 	setup_timer();
 	setup_registers();
 }
@@ -33,6 +35,8 @@ int main(void) {
 	setup();
 	puts("Hello\r\n");
 	struct key keys[KEYS_AMOUNT];
+	struct calculator calc;
+	clearCalc(&calc);
 	fill_buttons_names(keys);
 	while(1) {
 		get_physical_keys(keys);
@@ -43,44 +47,18 @@ int main(void) {
 			get_event(&keys[i], &up, &down);
 			if (down)
 			{
-				printf("%d", keys[i].button);
+				//printf("button %d\r\n", keys[i].button);
+				handleCalc(&calc, keys[i].button);
+				output_on_display(&calc);
+				//printf("-----\r\n");
+				//printf("%ld\r\n", calc.num1);
+				//printf("%ld\r\n", calc.num2);
+				//printf("%ld\r\n", calc.result);
+				//printf("%d\r\n", calc.operation);
+				//printf("%d\r\n", calc.state);
+				
 			}
 		}
-		
-		//down_amount = 0;
-		//up_amoumt = 0;
-		//
-		//for (int i = 0; i < KEYS_AMOUNT; i++) {
-			//if (keys[i].logical == false) {
-				//down_amount++;
-			//} else {
-				//up_amoumt++;
-			//}
-			////bool up;
-			////bool down;
-			////get_event(&keys[i], &up, &down);
-			////if (down) {
-				////down_amount++;
-			////}
-			////else {
-				////up_amoumt++;
-			////}
-		//}
-		//diff = up_amoumt;
-		////if (diff != diff_prev) {
-			//for (int i = 0; i < KEYS_AMOUNT; i++) {
-				//bool up, down;
-				//get_event(&keys[i], &up, &down);
-				////if (keys[i].logical == true) {
-					////printf("%d", keys[i].button);
-				////}
-				//if (down) {
-					////printf("%s\r\n", i);
-					//printf("%d", keys[i].button);
-				//}
-			//}
-		////}
-		//diff_prev = diff;
 	}
 }
 
@@ -99,8 +77,8 @@ int printf( const char * format, ... )
 	va_start (args, format);
 	size_t s = vsprintf (buffer,format, args);
 	for(size_t i = 0; i < s; i++){
-			while (!(UCSR0A & (1<<UDREn)));
-			UDR0 = buffer[i];
+		while (!(UCSR0A & (1<<UDREn)));
+		UDR0 = buffer[i];
 	}
 	va_end (args);
 	return s;

spi_master.c

@@ -0,0 +1,285 @@
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <string.h>
+#include <util/delay.h>
+#include "spi_master.h"
+#include "func.h"
+
+#define MAX_DIGITS 11
+#define F_CPU 16000000UL
+#define DELAY_MS 3000
+
+void output_on_display(struct calculator *calc)
+{
+	char buffer[8];
+	switch (calc->state)
+	{
+		case NUMBER_FIRST:
+		{
+			size_t b_size = display_all_clear(0, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			b_size = display_set_page(0x01, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			int size = count_digits(calc->num1);
+			char mapped_digits[size];
+			prepare_data(mapped_digits, calc->num1, size);
+			b_size = display_add_simbol(mapped_digits, size, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			break;
+		}
+		case NUMBER_SECOND:
+		{
+			size_t b_size = display_all_clear(0, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			b_size = display_set_page(0x01, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			int size = count_digits(calc->num1);
+			char mapped_digits[size];
+			prepare_data(mapped_digits, calc->num1, size);
+			b_size = display_add_simbol(mapped_digits, size, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			char symbol[] = {0x01};
+			// îïåðàöèÿ
+			switch (calc->operation)
+			{
+				case NO_OP:
+				break;
+				case ADD:
+				symbol[0] = 0x04;
+				break;
+				case SUB:
+				symbol[0] = 0x06;
+				break;
+				case DIV:
+				symbol[0] = 0x08;
+				break;
+				case MUL:
+				symbol[0] = 0x03;
+				break;
+			}
+			
+			b_size = display_add_simbol(symbol, 1, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			b_size = display_set_page(0x02, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			size = count_digits(calc->num2);
+			char mapped_digits1[size];
+			prepare_data(mapped_digits1, calc->num2, size);
+			b_size = display_add_simbol(mapped_digits1, size, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			break;
+		}
+		case RESULT:
+		{
+			size_t b_size = display_all_clear(0, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			b_size = display_set_page(0x01, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			int size = count_digits(calc->num1);
+			char mapped_digits[size];
+			prepare_data(mapped_digits, calc->num1, size);
+			b_size = display_add_simbol(mapped_digits, size, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			char symbol[] = {0x01};
+			// îïåðàöèÿ
+			switch (calc->operation)
+			{
+				case NO_OP:
+				break;
+				case ADD:
+				symbol[0] = 0x04;
+				break;
+				case SUB:
+				symbol[0] = 0x06;
+				break;
+				case DIV:
+				symbol[0] = 0x08;
+				break;
+				case MUL:
+				symbol[0] = 0x03;
+				break;
+			}
+			
+			b_size = display_add_simbol(symbol, 1, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			b_size = display_set_page(0x02, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			size = count_digits(calc->num2);
+			char mapped_digits1[size];
+			prepare_data(mapped_digits1, calc->num2, size);
+			b_size = display_add_simbol(mapped_digits1, size, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+
+			// ëèíèÿ
+			
+			
+			// ðåçóëüòàò
+			b_size = display_set_page(0x03, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			symbol[0] = 0x15;
+			b_size = display_add_simbol(symbol, 1, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			size = count_digits(calc->result);
+			char mapped_digits2[size];
+			prepare_data(mapped_digits2, calc->result, size);
+			b_size = display_add_simbol(mapped_digits2, size, buffer);
+			SPI_MasterTransmit(buffer, b_size);
+			
+			break;
+		}
+		default:
+		display_all_clear(0, buffer);
+	}
+}
+
+void SPI_MasterInit(void)
+{
+	/* Íàñòðîéêà MOSI è SCK êàê âûõîä,
+	âñå îñòàëüíûå ñèãíàëû êàê âõîä: */
+	SPI_DDRX = (1 << SPI_MOSI) | (1 << SPI_SCK) | (1 << SPI_SS) | (0 << SPI_MISO);
+
+	/* Ðàçðåøèòü ðàáîòó SPI, ðåæèì Master,
+	óñòàíîâèòü ñêîðîñòü òàêòîâ fck/16: */
+	SPCR = (1 << SPE) | (1 << MSTR) | (0 << CPOL) | (0 << CPHA) | (1 << SPR1);
+
+	SPI_PORTX |= (1 << SPI_SS);
+}
+
+void SPI_MasterTransmit(char *buffer, size_t length)
+{
+	SPI_PORTX &= ~(1 << SPI_SS);
+	for (int i = 0; i < length; i++)
+	{
+		SPDR = buffer[i];
+		while (!(SPSR & (1 << SPIF)))
+		{
+			// îæèäàíèå çàâåðøåíèÿ ïåðåäà÷è
+		}
+	}
+	SPI_PORTX |= (1 << SPI_SS);
+	_delay_ms(DELAY_MS);
+}
+
+char crc8(char *data, int len) {
+	char crc = 0x00;
+	while (len--) {
+		crc ^= *data++;
+		for (int i = 0; i < 8; i++) {
+			if (crc & 0x80) {
+				crc = (crc << 1) ^ 0x07;
+				} else {
+				crc <<= 1;
+			}
+		}
+	}
+	return crc;
+}
+
+//î÷èùåíèå ýêðàía
+size_t display_all_clear(char color, char *buffer)
+{
+	buffer[0] = 0x01;
+	buffer[1] = color;
+	buffer[2] = crc8(buffer, 2);
+	return 3;
+}
+
+//âûáîð òî÷êè
+size_t display_set_page(char point, char *buffer)
+{
+	buffer[0] = 0x02;
+	buffer[1] = point;
+	buffer[2] = crc8(buffer, 2);
+	return 3;
+}
+
+//äîáàâëåíèå íîâîãî ñèìâîëà è åãî ïàðàìåòðîâ
+size_t display_add_simbol(char *str, size_t str_len, char *buffer)
+{
+	size_t idx = 0;
+	buffer[idx] = 0x03;
+	idx++;
+	for (int i = 0; i < str_len; i++)
+	{
+		buffer[idx] = str[i];
+		idx++;
+	}
+	buffer[idx] = crc8(buffer, idx);
+	idx++;
+	return idx;
+}
+
+//óäàëåíèå ñèìâîëà è åãî ïàðàìåòðîâ
+size_t display_del_simbol(char number, char *buffer)
+{
+	buffer[0] = 0x04;
+	buffer[1] = number;
+	buffer[2] = crc8(buffer, 2);
+	return 3;
+}
+
+//çàêðàøèâàíèå ïèêñåëÿ
+size_t display_draw_pixel(char x, char y, char color, uint8_t *buffer)
+{
+	buffer[0] = 0x05;
+	buffer[1] = x;
+	buffer[2] = y;
+	buffer[3] = color;
+	buffer[4] = crc8(buffer, 4);
+	return 5;
+}
+
+//ðèñóåò ëèíèþ
+size_t display_draw_line(char x1, char y1, char x2, char y2, char color, char *buffer)
+{
+	buffer[0] = 0x06;
+	buffer[1] = x1;
+	buffer[2] = y1;
+	buffer[3] = x2;
+	buffer[4] = y2;
+	buffer[5] = color;
+	buffer[6] = crc8(buffer, 6);
+	return 7;
+}
+
+//ðèñóåò êðóã
+size_t display_draw_circle(char x, char y, char r, char color, uint8_t *buffer)
+{
+	buffer[0] = 0x07;
+	buffer[1] = x;
+	buffer[2] = y;
+	buffer[3] = r;
+	buffer[4] = color;
+	buffer[5] = crc8(buffer, 5);
+	return 6;
+}
+
+//ðèñóåò ïðÿìîóãîëüíèê
+size_t display_draw_rectangle(char x, char y, char height, char width, char color, uint8_t *buffer)
+{
+	buffer[0] = 0x08;
+	buffer[1] = x;
+	buffer[2] = y;
+	buffer[3] = height;
+	buffer[4] = width;
+	buffer[5] = color;
+	buffer[6] = crc8(buffer, 6);
+	return 7;
+}
+
+

spi_master.h

@@ -0,0 +1,20 @@
+#define SPI_PORTX PORTB
+#define SPI_DDRX DDRB
+#define SPI_MISO 4
+#define SPI_MOSI 3
+#define SPI_SCK 5
+#define SPI_SS 2
+
+#include "calculator.h"
+
+void output_on_display(struct calculator *calc);
+void SPI_MasterInit(void);
+void SPI_MasterTransmit(char *buffer, size_t length);
+void transmit_first_num(struct calculator *calc, char *buffer);
+void transmit_second_num(struct calculator *calc, char *buffer);
+void transmit_result(struct calculator *calc, char *buffer, char *symblo);
+size_t display_all_clear(char color, char *buffer);
+size_t display_add_simbol(char *str, size_t str_len, char *buffer);
+size_t display_draw_line(char x1, char y1, char x2, char y2, char color, char *buffer);
+size_t display_del_simbol(char number, char *buffer);
+size_t display_set_page(char point, char *buffer);