Fix spacing

- Enable Instrumentation Trace Macroblock
- Remove PB3 initialization conflict with ITM
- Add a bunch of debug prints

Core/Inc/main.h

@@ -24,7 +24,19 @@
 extern "C" {
 #endif
 
+#define DEBUG
 #ifdef DEBUG
+static inline void ITM_Print(const char *str) {
+    while (*str) {
+        uint32_t timeout = 1000;
+        while ((ITM->PORT[0].u32 == 0) && (timeout-- > 0));
+
+        if (timeout > 0) {
+            ITM->PORT[0].u8 = (uint8_t)(*str);
+        }
+        str++;
+    }
+}
 #define DEBUG_PRINT(x) ITM_Print(x)
 #else
 #define DEBUG_PRINT(x)

Core/Src/main.c

@@ -95,7 +95,7 @@ int main(void)
   ITM->LAR = 0xC5ACCE55;
   ITM->TER = 1 << 0;
   ITM->TCR = ITM_TCR_ITMENA_Msk | ITM_TCR_SYNCENA_Msk | ITM_TCR_SWOENA_Msk;
-  ITM_Print("Booting system\r\n");
+  DEBUG_PRINT("Booting system\r\n");
   /* USER CODE END 1 */
 
   /* MCU Configuration--------------------------------------------------------*/
@@ -104,7 +104,7 @@ int main(void)
   HAL_Init();
 
   /* USER CODE BEGIN Init */
-  ITM_Print("Configuring system clock\r\n");
+  DEBUG_PRINT("Configuring system clock\r\n");
 
   /* USER CODE END Init */
 
@@ -112,7 +112,7 @@ int main(void)
   SystemClock_Config();
 
   /* USER CODE BEGIN SysInit */
-  ITM_Print("Initializing configured peripherals...\r\n");
+  DEBUG_PRINT("Initializing configured peripherals...\r\n");
   /* USER CODE END SysInit */
 
   /* Initialize all configured peripherals */
@@ -123,14 +123,14 @@ int main(void)
   MX_SDIO_SD_Init();
   MX_USART1_UART_Init();
   /* USER CODE BEGIN 2 */
-  ITM_Print("Initializing CAN bus logger\r\n");
+  DEBUG_PRINT("Initializing CAN bus logger\r\n");
   CAN_Logger_Init(&hcan1, &hcan2);
   /* USER CODE END 2 */
 
   /* Init scheduler */
   osKernelInitialize();
 
-  ITM_Print("Creating RTOS entities\r\n");
+  DEBUG_PRINT("Creating RTOS entities\r\n");
 
   /* USER CODE BEGIN RTOS_TASKS */
   const osThreadAttr_t CAN1rxAttributes = {
@@ -191,7 +191,7 @@ int main(void)
   /* USER CODE END RTOS_EVENTS */
 
   /* Start scheduler */
-  ITM_Print("Starting RTOS init scheduler\r\n");
+  DEBUG_PRINT("Starting RTOS init scheduler\r\n");
   osKernelStart();
 
   /* We should never get here as control is now taken by the scheduler */
@@ -203,7 +203,7 @@ int main(void)
     /* USER CODE END WHILE */
 
     /* USER CODE BEGIN 3 */
-    ITM_Print("Error: RTOS scheduler crashed!\r\n");
+    DEBUG_PRINT("ERROR: RTOS scheduler crashed!\r\n");
     /* USER CODE END 3 */
   }
 }
@@ -286,7 +286,7 @@ static void MX_CAN1_Init(void)
     Error_Handler();
   }
   /* USER CODE BEGIN CAN1_Init 2 */
-  ITM_Print("CAN1 initialized!\r\n");
+  DEBUG_PRINT("CAN1 initialized!\r\n");
   /* USER CODE END CAN1_Init 2 */
 
 }
@@ -323,7 +323,7 @@ static void MX_CAN2_Init(void)
     Error_Handler();
   }
   /* USER CODE BEGIN CAN2_Init 2 */
-  ITM_Print("CAN2 initialized!\r\n");
+  DEBUG_PRINT("CAN2 initialized!\r\n");
   /* USER CODE END CAN2_Init 2 */
 
 }
@@ -359,7 +359,7 @@ static void MX_SDIO_SD_Init(void)
     Error_Handler();
   }
   /* USER CODE BEGIN SDIO_Init 2 */
-  ITM_Print("SDIO initialized!\r\n");
+  DEBUG_PRINT("SDIO initialized!\r\n");
   /* USER CODE END SDIO_Init 2 */
 
 }
@@ -392,7 +392,7 @@ static void MX_USART1_UART_Init(void)
     Error_Handler();
   }
   /* USER CODE BEGIN USART1_Init 2 */
-  ITM_Print("USART1 initialized!\r\n");
+  DEBUG_PRINT("USART1 initialized!\r\n");
   /* USER CODE END USART1_Init 2 */
 
 }
@@ -415,7 +415,7 @@ static void MX_DMA_Init(void)
   HAL_NVIC_EnableIRQ(DMA2_Stream6_IRQn);
 
   /* USER CODE BEGIN MX_DMA_Init 1 */
-  ITM_Print("DMA initialized!\r\n");
+  DEBUG_PRINT("DMA initialized!\r\n");
   /* USER CODE END MX_DMA_Init 1 */
 }
 
@@ -479,15 +479,15 @@ static void MX_GPIO_Init(void)
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
-  /*Configure GPIO pins : PB3 PB4 PB5 */
-  GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5;
+  /*Configure GPIO pins : PB4 PB5 */
+  GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5;
   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
   HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
   /* USER CODE BEGIN MX_GPIO_Init_2 */
-  ITM_Print("GPIO initialized!\r\n");
+  DEBUG_PRINT("GPIO initialized!\r\n");
   /* USER CODE END MX_GPIO_Init_2 */
 }
 
@@ -522,7 +522,7 @@ void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
   */
 void Error_Handler(void)
 {
-  ITM_Print("ERROR: entering error handler\r\n");
+  DEBUG_PRINT("ERROR: entering error handler\r\n");
 
   /* USER CODE BEGIN Error_Handler_Debug */
   /* User can add his own implementation to report the HAL error return state */