STM32F4XX/APM32F4XX USB OTA升级

近期在研究USB CDC协议，使用USB Virtual Port Com功能与上位机通讯做了OTA功能。开发平台：MDK529
开发硬件：APM32F411
首先看下手册Flash分布，Flash总共8个扇区。

接下来进行Flash分区。

扇区 0 和扇区 1做Boo区。

扇区 2做APP跳转判断区。

扇区 3到扇区 7做APP程序区。
既然分区已经分好，接下来就进行Boot代码编写。使用Virtual Port Com SDK。
打开MDK工程，进行Flash大小设置，Flash空间占用32k。勾选使用Use Micro LIB。
对main.c文件进行修改

#include "main.h"
#include "usb_device.h"
#include "gpio.h"
#include "Update.h"void SystemClock_Config(void);
typedef void (*pFunction)(void);
pFunction Jump_To_Application;
uint32_t JumpAddress;void Jump_To_App(uint32_t address)
{if (((*(__IO uint32_t*)address) & 0x2FFE0000) == 0x20000000){JumpAddress = *(__IO uint32_t*) (address + 4);Jump_To_Application = (pFunction) JumpAddress;__set_MSP(*(__IO uint32_t*) address);Jump_To_Application();}
}void USB_Disconnected(void) 
{__HAL_RCC_USB_OTG_FS_FORCE_RESET();HAL_Delay(200);__HAL_RCC_USB_OTG_FS_RELEASE_RESET();GPIO_InitTypeDef GPIO_Initure;__HAL_RCC_GPIOA_CLK_ENABLE();GPIO_Initure.Pin = GPIO_PIN_11 | GPIO_PIN_12;GPIO_Initure.Mode = GPIO_MODE_OUTPUT_PP;GPIO_Initure.Pull = GPIO_PULLDOWN;GPIO_Initure.Speed = GPIO_SPEED_FREQ_HIGH;HAL_GPIO_Init(GPIOA, &GPIO_Initure);HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOA, GPIO_PIN_12, GPIO_PIN_RESET);HAL_Delay(300);
}
int main(void)
{uint8_t R_Buff[1] = {0};HAL_Init();SystemClock_Config();Read_Flash_Data(R_Buff, 1, FLASH_Updata_Flag_ADDR);if(R_Buff[0] != 0x55){USB_Disconnected();MX_GPIO_Init();MX_USB_DEVICE_Init();printf("Boot Code Start\r\n");printf("%s\r\n", Device_Version_Info_Str);}else{}while (1){	if(R_Buff[0] == 0x55){Jump_To_App(FLASH_APP_ADDR);}else{Data_Handler();}}
}/*** @brief System Clock Configuration* @retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Configure the main internal regulator output voltage*/__HAL_RCC_PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);/** 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.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM = 4;RCC_OscInitStruct.PLL.PLLN = 96;RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ = 4;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_3) != HAL_OK){Error_Handler();}
}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//*** @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 */

增加Update.c文件

#include "Update.h"int fputc(int ch, FILE *f)
{while(CDC_Transmit_FS((uint8_t *)&ch, 1) == USBD_BUSY);return ch;
}void Set_Device_Info(void)
{uint32_t deviceserial2;deviceserial2 = *(uint32_t *) DEVICE_ID3;sprintf((char *)&Device_SSID_Info, "%d", deviceserial2);strcpy((char *)Device_Name_Info, Device_Name_Info_Str);strcpy((char *)Device_Version_Info, Device_Version_Info_Str);
}void Write_Flash(uint8_t *data, uint16_t DataLen, uint32_t Addr)
{uint16_t i = 0;uint32_t Data = 0;uint32_t temp = 0;HAL_FLASH_Unlock();for(i = 0; i < DataLen; i += 4){Data = 0;        for(uint8_t j = 0; j < 4; j++){temp = data[i + j];Data |= temp << 8 * j;}if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, FLASH_APP_ADDR + Addr + i, Data) == HAL_OK){}}HAL_FLASH_Lock();
}void Write_Updata_Flag_Flash(void)
{HAL_FLASH_Unlock();HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, FLASH_Updata_Flag_ADDR, 0x55555555);HAL_FLASH_Lock();
}void Erase_Updata_Flag_Flash(void)
{FLASH_EraseInitTypeDef EraseInitStruct;HAL_FLASH_Unlock();EraseInitStruct.TypeErase = FLASH_TYPEERASE_SECTORS;EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;EraseInitStruct.Sector = UPDATA_FLAG_SECTOR;EraseInitStruct.NbSectors = UPDATA_FLAG_SECTOR_NUM;if (HAL_FLASHEx_Erase(&EraseInitStruct, &PageError) != HAL_OK){}HAL_FLASH_Lock();
}void Erase_APP_Flash(void)
{FLASH_EraseInitTypeDef EraseInitStruct;HAL_FLASH_Unlock();EraseInitStruct.TypeErase = FLASH_TYPEERASE_SECTORS;EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;EraseInitStruct.Sector = UPDATA_APP_SECTOR;EraseInitStruct.NbSectors = UPDATA_APP_SECTOR_NUM;if (HAL_FLASHEx_Erase(&EraseInitStruct, &PageError) != HAL_OK){}HAL_FLASH_Lock();
}void Read_Flash_Data(uint8_t* pBuffer, uint32_t NumToRead, uint32_t ReadAddr)
{uint32_t i;for (i = 0; i < NumToRead; i++){*((uint8_t*)pBuffer + i) = *((uint8_t*)ReadAddr + i);}
}

增加Update.h文件

#ifndef __UPDATE_H
#define __UPDATE_H#include "main.h"
#include <string.h>
#include <stdbool.h>
#include <stdio.h>
#include "usbd_cdc_if.h"#define ADDR_FLASH_SECTOR_0     ((uint32_t)0x08000000) /* Base @ of Sector 0, 16 Kbytes */
#define ADDR_FLASH_SECTOR_1     ((uint32_t)0x08004000) /* Base @ of Sector 1, 16 Kbytes */
#define ADDR_FLASH_SECTOR_2     ((uint32_t)0x08008000) /* Base @ of Sector 2, 16 Kbytes */
#define ADDR_FLASH_SECTOR_3     ((uint32_t)0x0800C000) /* Base @ of Sector 3, 16 Kbytes */
#define ADDR_FLASH_SECTOR_4     ((uint32_t)0x08010000) /* Base @ of Sector 4, 64 Kbytes */
#define ADDR_FLASH_SECTOR_5     ((uint32_t)0x08020000) /* Base @ of Sector 5, 128 Kbytes */
#define ADDR_FLASH_SECTOR_6     ((uint32_t)0x08040000) /* Base @ of Sector 6, 128 Kbytes */
#define ADDR_FLASH_SECTOR_7     ((uint32_t)0x08060000) /* Base @ of Sector 7, 128 Kbytes */#define FLASH_Updata_Flag_ADDR	ADDR_FLASH_SECTOR_2
#define FLASH_APP_ADDR	ADDR_FLASH_SECTOR_3#define UPDATA_FLAG_SECTOR 		FLASH_SECTOR_2
#define UPDATA_FLAG_SECTOR_NUM 	1#define UPDATA_APP_SECTOR 		FLASH_SECTOR_3
#define UPDATA_APP_SECTOR_NUM 	3#define         DEVICE_ID3      (UID_BASE + 0x8)
#define Device_Name_Info_Str 	"APM32F411"
#define Device_SSID_Info_Str  	"1234"
#define Device_Version_Info_Str "Boot V 1.0"extern uint8_t Device_Name_Info[12];
extern uint8_t Device_SSID_Info[12];
extern uint8_t Device_Version_Info[12];
extern uint32_t PageError;void Erase_APP_Flash(void);
void Erase_Updata_Flag_Flash(void);
void Write_Updata_Flag_Flash(void);
void Write_Flash(uint8_t *data, uint16_t DataLen, uint32_t Addr);
void Read_Flash_Data(uint8_t* pBuffer, uint32_t NumToRead, uint32_t ReadAddr);void ClearRxQueue(void);
void OnDataReceived(uint8_t val);
void Data_Handler(void);#endif

修改usbd_cdc_if.c文件如下函数即可。

#include "Update.h"static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len)
{/* USER CODE BEGIN 6 */USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]);USBD_CDC_ReceivePacket(&hUsbDeviceFS);for(int i = 0; i < *Len; i++){OnDataReceived(Buf[i]);}return (USBD_OK);/* USER CODE END 6 */
}

接下来进行APP代码修改。可以复制Boot代码进行修改。
对Flash起始地址和大小进行修改。

修改main.c文件

#include "main.h"
#include "usb_device.h"
#include "gpio.h"
#include "Update.h"void SystemClock_Config(void);void USB_Disconnected(void) 
{__HAL_RCC_USB_OTG_FS_FORCE_RESET();HAL_Delay(200);__HAL_RCC_USB_OTG_FS_RELEASE_RESET();GPIO_InitTypeDef GPIO_Initure;__HAL_RCC_GPIOA_CLK_ENABLE();GPIO_Initure.Pin = GPIO_PIN_11 | GPIO_PIN_12;GPIO_Initure.Mode = GPIO_MODE_OUTPUT_PP;GPIO_Initure.Pull = GPIO_PULLDOWN;GPIO_Initure.Speed = GPIO_SPEED_FREQ_HIGH;HAL_GPIO_Init(GPIOA, &GPIO_Initure);HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOA, GPIO_PIN_12, GPIO_PIN_RESET);HAL_Delay(300);
}
int main(void)
{SCB->VTOR = FLASH_APP_ADDR;HAL_Init();SystemClock_Config();USB_Disconnected();MX_GPIO_Init();MX_USB_DEVICE_Init();printf("APP Code Start\r\n");printf("%s\r\n", Device_Version_Info_Str);while (1){Data_Handler();}
}/*** @brief System Clock Configuration* @retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Configure the main internal regulator output voltage*/__HAL_RCC_PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);/** 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.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM = 4;RCC_OscInitStruct.PLL.PLLN = 96;RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ = 4;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_3) != HAL_OK){Error_Handler();}
}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//*** @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 */

如上就行OTA升级的全部配置步骤。Update.h有很多宏定义可以修改。喜欢的可以下载代码自己试试。代码链接在文章末尾。
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