Return exact length

- Goes into error handling

Core/Inc/main.h

@@ -1,85 +1,74 @@
-/* USER CODE BEGIN Header */
-/**
-  ******************************************************************************
-  * @file           : main.h
-  * @brief          : Header for main.c file.
-  *                   This file contains the common defines of the application.
-  ******************************************************************************
-  * @attention
-  *
-  * Copyright (c) 2026 STMicroelectronics.
-  * Copyright (c) 2026 Erick Ahmed.
-  *
-  * SPDX-License-Identifier: GPL-3.0-or-later
-  *
-  ******************************************************************************
-  */
-/* USER CODE END Header */
-
-/* Define to prevent recursive inclusion -------------------------------------*/
-#ifndef __MAIN_H
-#define __MAIN_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Includes ------------------------------------------------------------------*/
-#include "stm32f4xx_hal.h"
-
-
-/* Private includes ----------------------------------------------------------*/
-/* USER CODE BEGIN Includes */
-#include <stdint.h>
-#include "canlog.h"
-/* USER CODE END Includes */
-
-/* Exported types ------------------------------------------------------------*/
-/* USER CODE BEGIN ET */
-
-/* USER CODE END ET */
-
-/* Exported constants --------------------------------------------------------*/
-/* USER CODE BEGIN EC */
-
-/* USER CODE END EC */
-
-/* Exported macro ------------------------------------------------------------*/
-/* USER CODE BEGIN EM */
-#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)
-#endif
-/* USER CODE END EM */
-
-/* Exported functions prototypes ---------------------------------------------*/
-void Error_Handler(void);
-
-/* USER CODE BEGIN EFP */
-
-/* USER CODE END EFP */
-
-/* Private defines -----------------------------------------------------------*/
-
-/* USER CODE BEGIN Private defines */
-
-/* USER CODE END Private defines */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* __MAIN_H */
+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file           : main.h
+  * @brief          : Header for main.c file.
+  *                   This file contains the common defines of the application.
+  ******************************************************************************
+  * @attention
+  *
+  * Copyright (c) 2026 STMicroelectronics.
+  * Copyright (c) 2026 Erick Ahmed.
+  *
+  * SPDX-License-Identifier: GPL-3.0-or-later
+  *
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __MAIN_H
+#define __MAIN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_hal.h"
+
+/* Private includes ----------------------------------------------------------*/
+/* USER CODE BEGIN Includes */
+#include <stdint.h>
+#include "canlog.h"
+/* USER CODE END Includes */
+
+/* Exported types ------------------------------------------------------------*/
+/* USER CODE BEGIN ET */
+
+/* USER CODE END ET */
+
+/* Exported constants --------------------------------------------------------*/
+/* USER CODE BEGIN EC */
+
+/* USER CODE END EC */
+
+/* Exported macro ------------------------------------------------------------*/
+/* USER CODE BEGIN EM */
+#define DEBUG
+#ifdef DEBUG
+#include <stdio.h>
+#define DEBUG_PRINT(...) printf(__VA_ARGS__)
+#else
+#define DEBUG_PRINT(...)
+#endif
+/* USER CODE END EM */
+
+/* Exported functions prototypes ---------------------------------------------*/
+void Error_Handler(void);
+
+/* USER CODE BEGIN EFP */
+
+/* USER CODE END EFP */
+
+/* Private defines -----------------------------------------------------------*/
+
+/* USER CODE BEGIN Private defines */
+
+/* USER CODE END Private defines */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __MAIN_H */

Core/Src/cansend.c

@@ -32,7 +32,7 @@ extern osMessageQueueId_t xUARTQueue;
   * @param  arguments: buffer, source, message
   * @retval None
   */
-static void format_can_message(char *buf, uint8_t source, const CanMessage_t *message)
+static int format_can_message(char *buf, uint8_t source, const CanMessage_t *message)
 {
   const char hex[] = "0123456789ABCDEF";
 
@@ -72,6 +72,9 @@ static void format_can_message(char *buf, uint8_t source, const CanMessage_t *me
 
   buf[idx++] = '\r';
   buf[idx++] = '\n';
+  buf[idx] = '\0';
+
+  return idx;
 }
 /* END format_can_message */
 
@@ -108,7 +111,7 @@ void vUARTLogger(void *argument)
       {
         DEBUG_PRINT("CAN frame detected\r\n");
         format_can_message(tx_buffer, message.source, &message);
-        HAL_UART_Transmit_DMA(&huart1, (uint8_t*)tx_buffer, 44);
+        HAL_UART_Transmit_DMA(&huart1, (uint8_t*)tx_buffer, len);
         osSemaphoreAcquire(xUARTDMASemaphore, osWaitForever);
         DEBUG_PRINT("CAN frame sent via UART\r\n");
       }

can_logger.ioc

@@ -68,30 +68,26 @@ Mcu.IP8=USART1
 Mcu.IPNb=9
 Mcu.Name=STM32F405RGTx
 Mcu.Package=LQFP64
-Mcu.Pin0=PA0-WKUP
-Mcu.Pin1=PB12
-Mcu.Pin10=PC10
-Mcu.Pin11=PC11
-Mcu.Pin12=PC12
-Mcu.Pin13=PD2
-Mcu.Pin14=PB3
-Mcu.Pin15=PB4
-Mcu.Pin16=PB5
-Mcu.Pin17=PB6
-Mcu.Pin18=PB7
-Mcu.Pin19=PB8
-Mcu.Pin2=PB13
-Mcu.Pin20=PB9
-Mcu.Pin21=VP_FREERTOS_VS_CMSIS_V2
-Mcu.Pin22=VP_SYS_VS_tim6
-Mcu.Pin3=PC8
-Mcu.Pin4=PC9
-Mcu.Pin5=PA9
-Mcu.Pin6=PA10
-Mcu.Pin7=PA13
-Mcu.Pin8=PA14
-Mcu.Pin9=PA15
-Mcu.PinsNb=23
+Mcu.Pin0=PB12
+Mcu.Pin1=PB13
+Mcu.Pin10=PC12
+Mcu.Pin11=PD2
+Mcu.Pin12=PB5
+Mcu.Pin13=PB6
+Mcu.Pin14=PB7
+Mcu.Pin15=PB8
+Mcu.Pin16=PB9
+Mcu.Pin17=VP_FREERTOS_VS_CMSIS_V2
+Mcu.Pin18=VP_SYS_VS_tim6
+Mcu.Pin2=PC8
+Mcu.Pin3=PC9
+Mcu.Pin4=PA9
+Mcu.Pin5=PA10
+Mcu.Pin6=PA13
+Mcu.Pin7=PA14
+Mcu.Pin8=PC10
+Mcu.Pin9=PC11
+Mcu.PinsNb=19
 Mcu.ThirdPartyNb=0
 Mcu.UserConstants=
 Mcu.UserName=STM32F405RGTx
@@ -117,26 +113,18 @@ NVIC.TIM6_DAC_IRQn=true\:15\:0\:false\:false\:true\:false\:false\:true\:true
 NVIC.TimeBase=TIM6_DAC_IRQn
 NVIC.TimeBaseIP=TIM6
 NVIC.UsageFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false\:false
-PA0-WKUP.Mode=SYS_WakeUp0
-PA0-WKUP.Signal=SYS_WKUP
 PA10.Mode=Asynchronous
 PA10.Signal=USART1_RX
-PA13.Mode=JTAG_5_pins
+PA13.Mode=Serial_Wire
 PA13.Signal=SYS_JTMS-SWDIO
-PA14.Mode=JTAG_5_pins
+PA14.Mode=Serial_Wire
 PA14.Signal=SYS_JTCK-SWCLK
-PA15.Mode=JTAG_5_pins
-PA15.Signal=SYS_JTDI
 PA9.Mode=Asynchronous
 PA9.Signal=USART1_TX
 PB12.Mode=CAN_Activate
 PB12.Signal=CAN2_RX
 PB13.Mode=CAN_Activate
 PB13.Signal=CAN2_TX
-PB3.Mode=JTAG_5_pins
-PB3.Signal=SYS_JTDO-SWO
-PB4.Mode=JTAG_5_pins
-PB4.Signal=SYS_JTRST
 PB5.Locked=true
 PB5.Signal=GPIO_Output
 PB6.Locked=true