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单片机调试技巧--修改bin文件实现断点

article 2025/1/23 2:14:38

         

fromelf --text -a -c --output=all.dis F103_Moduel\F103_Moduel.axf

fromelf --bin --output=test.bin F103_Moduel\F103_Moduel.axf

在启动文件中，修改UsageFault_Handler

UsageFault_Handler\
                PROC
		; get current context
		TST 	lr, #0x04				; if(!EXC_RETURN[2])
		ITE 	EQ
		MRSEQ	r0, msp 				; [2]=0 ==> Z=1, get fault context from handler.
		MRSNE	r0, psp 				; [2]=1 ==> Z=0, get fault context from thread.
		
		STMFD	r0!, {r4 - r11} 		; push r4 - r11 register
		STMFD	r0!, {lr}				; push exec_return register
		
		TST 	lr, #0x04				; if(!EXC_RETURN[2])
		ITE 	EQ
		MSREQ	msp, r0 				; [2]=0 ==> Z=1, update stack pointer to MSP.
		MSRNE	psp, r0 				; [2]=1 ==> Z=0, update stack pointer to PSP.
		
		PUSH	{lr}
		BL		rt_hw_hard_fault_exception
		POP 	{lr}
		
		ORR 	lr, lr, #0x04
		BX		lr
		ENDP

实现rt_hw_hard_fault_exception函数

#define rt_uint32_t unsigned int
struct exception_info
{
    rt_uint32_t exc_return;
    rt_uint32_t r4;
    rt_uint32_t r5;
    rt_uint32_t r6;
    rt_uint32_t r7;
    rt_uint32_t r8;
    rt_uint32_t r9;
    rt_uint32_t r10;
    rt_uint32_t r11;
    rt_uint32_t r0;
    rt_uint32_t r1;
    rt_uint32_t r2;
    rt_uint32_t r3;
    rt_uint32_t r12;
    rt_uint32_t lr;
    rt_uint32_t pc;
    rt_uint32_t psr;
};


/*
 * fault exception handler
 */
void rt_hw_hard_fault_exception(struct exception_info * exception_info)
{
	unsigned int *app_sp;

	int i;
	app_sp = (unsigned int *)(exception_info + 1);  /* context + 16*4 */
	
    printf("psr: 0x%08x\r\n", exception_info->psr);
    printf("r00: 0x%08x\r\n", exception_info->r0);
    printf("r01: 0x%08x\r\n", exception_info->r1);
    printf("r02: 0x%08x\r\n", exception_info->r2);
    printf("r03: 0x%08x\r\n", exception_info->r3);
    printf("r04: 0x%08x\r\n", exception_info->r4);
    printf("r05: 0x%08x\r\n", exception_info->r5);
    printf("r06: 0x%08x\r\n", exception_info->r6);
    printf("r07: 0x%08x\r\n", exception_info->r7);
    printf("r08: 0x%08x\r\n", exception_info->r8);
    printf("r09: 0x%08x\r\n", exception_info->r9);
    printf("r10: 0x%08x\r\n", exception_info->r10);
    printf("r11: 0x%08x\r\n", exception_info->r11);
    printf("r12: 0x%08x\r\n", exception_info->r12);
    printf(" lr: 0x%08x\r\n", exception_info->lr);
    printf(" pc: 0x%08x\r\n", exception_info->pc);



	printf("stacks: \r\n");
	i = 0;
	for (i = 0; i < 1024; )
	{
		printf("%08x ", *app_sp);
		app_sp++;
		i++;
		if (i % 16 == 0)
			printf("\r\n");
			
	}
	printf("\r\n");

    while (1);
}

The SHCSR enables the system handlers，这个函数作用就是使能UsageFault 

void UsageFaultInit(void)
{
	SCB->SHCSR |= (SCB_SHCSR_USGFAULTENA_Msk);
}

main.c中

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "cmsis_os.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "driver_usart.h"
#include "driver_key.h"
#include <stdio.h>
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void MX_FREERTOS_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */


ring_buffer test_buffer;

static void A(void);
static void B(char *buf);
static int C(int b);

static void A(void)
{
	volatile int val = 1;
	//volatile int val2 = 1;
	char buf[16];
	B(buf);
	C(val);
}

static void B(char *buf)
{
	strcpy(buf, "192.168.100.106 ");
}

static int C(int b)
{
	return 100/b;
}

static void D(void)
{	
	printf("Enter D()\r\n");
	C(1);
	printf("Exit D()\r\n");
}



void UsageFaultInit(void)
{
	SCB->SHCSR |= (SCB_SHCSR_USGFAULTENA_Msk);
}


void TestDebug(void)
{
	/* 100ask add */
	/* 使能除0错误
	 * CCR(0xE000ED14)的bit4(DIV_0_TRP)设置为1
	 */
	volatile int *CCR = (volatile int *)0xE000ED14;
	*CCR |= (1<<4);

	UsageFaultInit();

	A();
}

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
    
  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  MX_USART3_UART_Init();
  /* USER CODE BEGIN 2 */
  
	KEY_GPIO_ReInit();
	
    ring_buffer_init(&test_buffer);
  
    EnableDebugIRQ();
    printf("Hello World!\r\n");

	TestDebug();

  /* USER CODE END 2 */

  /* Init scheduler */
  osKernelInitialize();  /* Call init function for freertos objects (in freertos.c) */
  MX_FREERTOS_Init();
  /* Start scheduler */
  osKernelStart();

  /* We should never get here as control is now taken by the scheduler */
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  Period elapsed callback in non blocking mode
  * @note   This function is called  when TIM8 interrupt took place, inside
  * HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
  * a global variable "uwTick" used as application time base.
  * @param  htim : TIM handle
  * @retval None
  */
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
  /* USER CODE BEGIN Callback 0 */

  /* USER CODE END Callback 0 */
  if (htim->Instance == TIM8) {
    HAL_IncTick();
  }
  /* USER CODE BEGIN Callback 1 */

  /* USER CODE END Callback 1 */
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/


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