實驗現象及操作說明:
1、本例程共有兩個程式碼包,APP和IAP,IAP程式功能實現將APP程式升級至STM32中。
2、直接上電或燒寫程式將執行升級的APP應用程式。
BIN升級檔案產生方法:
1、編譯APP工程,產生.hex檔案。
2、將.hex檔案拖至HEX2BIN.EXE即可產生.bin檔案。
核心程式碼:
int main(void) { /* USER CODE BEGIN 1 */ int i; /* 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_CRC_Init(); MX_USART1_UART_Init(); /* USER CODE BEGIN 2 */ usart1.initialize(115200); usart1.printf("\x0c"); //ÇåÆÁ usart1.printf("\033[1;32;40m"); //ÉèÖÃÖÕ¶Ë×ÖÌåΪÂÌÉ« for(i=0;i<100000;i++); //°´¼üËÉ¿ª£¬ÌøÖÁstart if(ARM_KEY_STATE == KEY_UP){ goto start; } while(1){ if(i ++ == 5000000){ //´®¿Ú·¢ËÍ×Ö·ûC usart1.send_byte('C'); i = 0; } if(usart1.receive_buffer[0] == SOH){ break; } } /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { if(usart1.receive_ok_flag == 1){ usart1.receive_ok_flag = 0; xmodem.process(); if(usart1.receive_buffer[0] == EOT){ usart1.send_byte(ACK); //¶Á±£»¤ for(i = 0; i < 100000; i ++); HAL_FLASH_Lock(); //·¢ËÍÎļþ³É¹¦£¬Â̵ÆÁÁ LED_BLUE_OFF; LED_RED_OFF; LED_GREEN_ON; while(1); } } /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ } start: //²âÊÔÓû§´úÂëÊÇ·ñ´ÓAPPLICATION_ADDRESS±»±à³Ì if (((*(__IO uint32_t*)APPLICATION_ADDRESS) & 0x2FFE0000 ) == 0x20000000){ //ÌøתÖÁÓû§³ÌÐò JumpAddress = *(__IO uint32_t*) (APPLICATION_ADDRESS + 4); Jump_To_Application = (pFunction) JumpAddress; //³õʼ»¯Óû§³ÌÐòµÄ¶ÑÕ»Ö¸Õë __set_MSP(*(__IO uint32_t*) APPLICATION_ADDRESS); //ÌøתÖÁÓ¦ÓóÌÐò Jump_To_Application(); }else{ led_trade(); } /* USER CODE END 3 */ }
實驗方法及指導書:
連結:http://pan.baidu.com/s/1jIaM6lo 密碼:7oiv