接上一篇文章：单Bank OTA升级：STM32G071 BootLoader (一)：跳转链接

什么是单Bank升级：将Flash划分为以下3个区域。

BootLoader区：程序进行升级的引导程序，根据Upade_Flag来判断跳转Bank区运行程序或是接收升级数据写入Bank，接收完成后擦写Upade_Flag区，进行跳转Bank区运行程序。

Upade_Flag区：判断BootLoader是否能跳转IAP程序的标志位。

Bank区：用户程序区。

IAP程序只需要在BootLoader的基础上进行如下修改

对程序起始地址和内存大小进行设置。

 main.c文件

int main(void)
{SCB->VTOR = FLASH_APP_ADDR;HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_USART1_UART_Init();MX_USART2_UART_Init();ClearRxQueue();printf("IAP Code \r\n");while (1){Usart_Data_Handler();}
}

 Update.c文件

bool Usart_Data_Handler(void)
{static uint8_t Data;static uint8_t Cmd;static uint8_t Check;static uint8_t Send_Data[10];static uint16_t Update_Pack_Num;static uint16_t Update_Pack_Num_Temp;static uint32_t Update_Data_Len;static uint32_t Write_Date_Len;static uint16_t Receive_Data_Len;static uint16_t Receive_Data_Count;while(GetRxQueueLen() > 0){	Data = GetRxQueueData();if(Receiver_State == RECEIVER_HEAD_H){if(Data == 0x55){Receiver_State++;}}else if(Receiver_State == RECEIVER_HEAD_L){if(Data == 0x55){Receiver_State++;}}else if(Receiver_State == RECEIVER_CMD){Receiver_State++;Receive_Data_Len = 0;Receive_Data_Count = 0;Cmd = Data;if(Cmd == 0x00){Erase_Updata_Flag_Flash();printf("Erase_Updata_Flag_Flash \r\n");NVIC_SystemReset();}    }else if(Receiver_State == RECEIVER_LEN_H){Receiver_State++;}else if(Receiver_State == RECEIVER_LEN_L){Receiver_State++;}else if(Receiver_State == RECEIVER_DATA){if(Receive_Data_Count == Receive_Data_Len){Receiver_State++;}}else if(Receiver_State == RECEIVER_CHECK){Receiver_State = RECEIVER_HEAD_H;}}
}

上位机升级工具：升级工具