Transmit buffer

Core/Src/Components/Start.cpp

@@ -43,9 +43,11 @@ void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t transferDirection, ui
         HAL_I2C_Slave_Seq_Receive_DMA(hi2c, receivingBuffer + receivingBufferDataSize, 1, I2C_NEXT_FRAME);
 	}else{
         slaveMode = Transmitting;
-        transmittingBuffer[0] = 0x55;
-        transmittingBufferDataSize = 1;
-        HAL_I2C_Slave_Seq_Transmit_DMA(hi2c, transmittingBuffer, transmittingBufferDataSize, I2C_LAST_FRAME);
+        if(transmittingBufferDataSize){
+            HAL_I2C_Slave_Seq_Transmit_DMA(hi2c, transmittingBuffer, transmittingBufferDataSize, I2C_LAST_FRAME);
+        }else{
+
+        }
 	}
 }
 
@@ -68,7 +70,7 @@ void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *hi2c) {
 }
 
 void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *hi2c) {
-    transmittingBufferDataSize = 0;
+    //transmittingBufferDataSize = 0;
 }
 
 void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c) {
@@ -76,9 +78,15 @@ void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c) {
 }
 
 void Start(){
+	uint8_t byte[4] = {33, 34, 35, 36};
 	HAL_I2C_EnableListen_IT(&hi2c3);
 	while(1){
 		HAL_GPIO_TogglePin(LD3_GPIO_Port, LD3_Pin);
-		HAL_Delay(10000);
+		transmit(byte, 3);
+		byte[0]++;
+		byte[1]++;
+		byte[2]++;
+		byte[3]++;
+		HAL_Delay(500);
 	}
 }

Core/Src/main.c

@@ -246,7 +246,7 @@ static void MX_I2C3_Init(void)
   hi2c3.Instance = I2C3;
   hi2c3.Init.ClockSpeed = 100000;
   hi2c3.Init.DutyCycle = I2C_DUTYCYCLE_2;
-  hi2c3.Init.OwnAddress1 = 126;
+  hi2c3.Init.OwnAddress1 = 32;
   hi2c3.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
   hi2c3.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
   hi2c3.Init.OwnAddress2 = 0;

Core/Src/syscalls.c

@@ -29,7 +29,7 @@
 #include <time.h>
 #include <sys/time.h>
 #include <sys/times.h>
-
+#include "main.h"
 
 /* Variables */
 extern int __io_putchar(int ch) __attribute__((weak));
@@ -80,7 +80,7 @@ __attribute__((weak)) int _write(int file, char *ptr, int len)
 
 	for (DataIdx = 0; DataIdx < len; DataIdx++)
 	{
-		__io_putchar(*ptr++);
+		ITM_SendChar(*ptr++);
 	}
 	return len;
 }