单片机调试技巧--修改bin文件实现断点

         

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 contextTST 	lr, #0x04				; if(!EXC_RETURN[2])ITE 	EQMRSEQ	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 registerSTMFD	r0!, {lr}				; push exec_return registerTST 	lr, #0x04				; if(!EXC_RETURN[2])ITE 	EQMSREQ	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_exceptionPOP 	{lr}ORR 	lr, lr, #0x04BX		lrENDP

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****/