stm32cubemx IAP升级(三)
stm32cubemx IAP升级- UART+DMA实现不定长收发数据
板卡:Nucleo-L412
平台:macbook pro
工具:vscode stm32cubemx stm32cubeProgramer cmake toolchain
Stm32CubeMx的配置
选择开启一路串口并配置成DMA,并使能中断,配置中断优先级。
## 代码实现
main.c
1、定义全局接收数组
uint8_t UART2_RX_BUF[UART2_RX_SIZE] = {0}; //串口接收缓存
uint8_t UART2_RX_LEN;
2、使能空闲中断,以及DMA接收数据
__HAL_UART_ENABLE_IT(&huart2,UART_IT_IDLE); //使能空闲中断
HAL_UART_Receive_DMA(&huart2,UART2_RX_BUF,UART2_RX_SIZE); //启动DMA接收,UART1_RX_BUF:数据接收缓冲
3、修改stm32l4xx_it.c,将USART2_IRQHandler函数修改如下
void USART2_IRQHandler(void)
{/* USER CODE BEGIN USART2_IRQn 0 *//* USER CODE END USART2_IRQn 0 */HAL_UART_IRQHandler(&huart2);/* USER CODE BEGIN USART2_IRQn 1 */if((__HAL_UART_GET_FLAG(&huart2,UART_FLAG_IDLE) != RESET)){__HAL_UART_CLEAR_IDLEFLAG(&huart2); //清除空闲状态标志HAL_UART_DMAStop(&huart2); //关闭DMA传输UART2_RX_LEN = UART2_RX_SIZE - __HAL_DMA_GET_COUNTER(&hdma_usart2_rx); //计算接收到的数据长度USAR_UART_IDLECallback(&huart2,UART2_RX_LEN ); //调用回调函数}/* USER CODE END USART2_IRQn 1 */
}
USAR_UART_IDLECallback函数定义,UART2_RX_BUF即收到的数据,rxlen即为收到数据的长度
void USAR_UART_IDLECallback(UART_HandleTypeDef *huart,uint8_t rxlen )
{if(huart == &huart2) //判断是否为串口1产生中断{if (rxlen >0)handle_uart_message(UART2_RX_BUF,rxlen);// HAL_UART_Transmit_DMA(&huart2, UART2_RX_BUF,rxlen); //将接收到的不定长数据发送到上位机rxlen = 0; //清除数据长度计数HAL_UART_Receive_DMA(&huart2,UART2_RX_BUF,UART2_RX_SIZE); //重新打开DMA接收 }
}
handle_uart_message函数为收到升级命令,数据,以及升级完成的命令的解析函数。
串口升级协议如下:
cmd + data_lenght + data0 + …+ datax + checksum
1、获取版本号 0x01 0x02 0x00 0x00 checksum
2、升级
1、进入升级模式 0x02 0x02 0x00 0x00 checksum
2、升级文件大小 0x03 0x04 0x00 0x00 0x00 0x00 checksum
3、数据包发送 0x04 0x80 0x00 0x00 0x00 0x00 … checksum
4、数据包发送完成 0x05 0x02 0x00 0x00 checksum
typedef enum uart_update_cmd
{UART_GET_SYSTEM_VERSION_CMD = 0x01,UART_ENTER_SYSTEM_UPDATE_MODE_CMD = 0x02,UART_GET_SYSTEM_FILE_SIZE_CMD = 0x03,UART_RECEIVE_SYSTEM_UPDATE_CMD = 0x04,UART_COMPLETE_SYSTEM_UPDATE_CMD = 0x05,}MI_UartUpdateCmd;MI_BOOL handle_uart_message(MI_U8 *p_buff,MI_U32 len)
{switch (p_buff[UART_CMD_INDEX]){case UART_GET_SYSTEM_VERSION_CMD/* constant-expression */:/* 获取系统版本号 */if (calculate_checksum_and_length(p_buff,len) == MI_TRUE){system_info_get_system_version(version);HAL_UART_Transmit_DMA(&huart2, version,strlen((const char *)version)); //将接收到的不定长数据发送到上位机}break;case UART_ENTER_SYSTEM_UPDATE_MODE_CMD:/* 进入升级模式命令 指示灯变为100ms闪烁一次*/if (calculate_checksum_and_length(p_buff,len) == MI_TRUE){led_freq = LED_TOGGLE_100_MS;w_time = 0;packets_numer = 0;upgrade_file_size = 0;remain_packets_numer = 0;isRunningUpdate = 1;printf("Mcu Receive Update Command and Wait Receive Data Packets \\r\\n");printf("Now to Erase Download Pages \\r\\n");printf("\\r\\n");int ret = stm32_erase_flash(DOWNLOAD_START_SECTOR_ADDR,DOWNLOAD_END_SECTOR_ADDR);printf("\\r\\n");}break;case UART_GET_SYSTEM_FILE_SIZE_CMD:if (calculate_checksum_and_length(p_buff,len) == MI_TRUE){int a = (int)p_buff[2];int b = (int)p_buff[3];int c = (int)p_buff[4];int d = (int)p_buff[5];upgrade_file_size = (a<<24) | (b<<16) | (c<<8) | (d);if (upgrade_file_size % UPGRADE_DATA_PACKAGES_LENGHT == 0) //如果整除128 {packets_numer = upgrade_file_size/128;}else{packets_numer = ((upgrade_file_size/128) + 1);}printf("End Erase Download Pages Down\\r\\n");printf("\\r\\n");printf("receive upgrade file size %d\\r\\n",upgrade_file_size);printf("data packets number %d\\r\\n",packets_numer);printf("\\r\\n");}break;case UART_RECEIVE_SYSTEM_UPDATE_CMD:if (calculate_checksum_and_length(p_buff,len) == MI_TRUE){printf("receive packets........................%03d [100] \\r\\n",(((w_time + 1) * 100) / packets_numer));memset(w_buff,0,sizeof(w_buff));memcpy(w_buff,&p_buff[2],sizeof(w_buff));stm32_flash_write(DOWNLOAD_START_SECTOR_ADDR+(w_time * UPGRADE_DATA_PACKAGES_LENGHT),w_buff,sizeof(w_buff));if (w_time + 1 == packets_numer){led_freq = LED_TOGGLE_1000_MS;printf("receive packets........................ done!\\r\\n");}w_time ++;}break;case UART_COMPLETE_SYSTEM_UPDATE_CMD:if (calculate_checksum_and_length(p_buff,len) == MI_TRUE){system_info_set_update_flag(SYSTEM_UPDATE);printf("Now Reboot !\\r\\n");app_soft_reset();}break; default:break;}return MI_TRUE;
}
校验采用CRC16
static MI_U16 CRC16(MI_U8 * buf, MI_U16 len)
{MI_U16 i;MI_U16 crc = 0xffff;if (len == 0) {len = 1;}while (len--) {crc ^= *buf;for (i = 0; i<8; i++) { if (crc & 1) { crc >>= 1; crc ^= 0xA001; } else { crc >>= 1; } } buf++;}return(crc);
}static MI_BOOL calculate_checksum_and_length(MI_U8 * buf, MI_U16 len)
{MI_U16 crc16 = CRC16(buf,len-2);if ((crc16 & 0x00ff) == buf[len-2] && ((crc16 >> 8) & 0x00ff) == buf[len-1]){if (buf[UART_CMD_LENGTH] == (len-2-2)){return MI_TRUE;}else{printf("crc16 right ,but cmd error\\r\\n"); //_Error_Handler(__FUNCTION__,__LINE__);return MI_FALSE; }}else{printf("crc16 error and right crc16 = 0x%04x\\r\\n",crc16); //_Error_Handler(__FUNCTION__,__LINE__);return MI_FALSE; }
}
flash写函数:
/* FLASH大小:STM32L412 :128K */
#define STM32_FLASH_SIZE 0x00020000UL
/* FLASH起始地址 */
#define STM32_FLASH_BASE 0x08000000UL
/* FLASH结束地址 */
#define STM32_FLASH_END (STM32_FLASH_BASE | STM32_FLASH_SIZE)
/* FLASH页大小:2K */
#define STM32_FLASH_PAGE_SIZE FLASH_PAGE_SIZE
/* FLASH总页数 64 页*/
#define STM32_FLASH_PAGE_NUM (STM32_FLASH_SIZE / STM32_FLASH_PAGE_SIZE)//针对STM32L412单片机,通过地址获取所在页的函数如下
MI_U32 get_flash_page(MI_U32 address) //获取地址所在的
{MI_U32 page = 0;if (address < (STM32_FLASH_BASE + FLASH_BANK_SIZE))page = (address - STM32_FLASH_BASE) / FLASH_PAGE_SIZE;elsepage = (address - (STM32_FLASH_BASE + FLASH_BANK_SIZE)) / FLASH_PAGE_SIZE;return page;
}MI_U8 stm32_erase_flash(MI_U32 start_addr,MI_U32 end_addr) //擦除flash
{FLASH_EraseInitTypeDef EraseInitStruct;MI_U32 FirstPages = 0,LastPages = 0, NbPages = 0;uint32_t pageError = 0;HAL_FLASH_Unlock(); //首先解锁flashFirstPages = get_flash_page(start_addr); //获取要擦除的第一个页LastPages = get_flash_page(end_addr);NbPages = LastPages - FirstPages; //获取擦除的页数量/* Fill EraseInit structure*/EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES; //页擦除EraseInitStruct.Banks = FLASH_BANK_1;EraseInitStruct.Page = FirstPages;EraseInitStruct.NbPages = NbPages;if(HAL_FLASHEx_Erase(&EraseInitStruct, &pageError) != HAL_OK){ HAL_FLASH_Lock(); //上锁return 2; //擦除有错误,返回2}//下面这些是清除标志位__HAL_FLASH_DATA_CACHE_DISABLE();__HAL_FLASH_INSTRUCTION_CACHE_DISABLE();__HAL_FLASH_DATA_CACHE_RESET();__HAL_FLASH_INSTRUCTION_CACHE_RESET();__HAL_FLASH_INSTRUCTION_CACHE_ENABLE();__HAL_FLASH_DATA_CACHE_ENABLE();HAL_FLASH_Lock(); //上锁return 0;
}MI_BOOL stm32_flash_write(MI_U32 dest_addr, MI_U8 *src, MI_U32 Len)
{MI_U32 i = 0;HAL_FLASH_Unlock();/* Clear OPTVERR bit set on virgin samples */__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPTVERR);for(i = 0; i < Len; i += 8){/* Device voltage range supposed to be [2.7V to 3.6V], the operation willbe done by byte */if(HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, (MI_U32)(dest_addr+i), *(uint64_t*)(src+i)) == HAL_OK){/* Check the written value */if(*(uint64_t *)(src + i) != *(uint64_t*)(dest_addr+i)){/* Flash content doesn't match SRAM content */HAL_FLASH_Lock(); return -1;}}else{HAL_FLASH_Lock(); /* Error occurred while writing data in Flash memory */return -1;}}HAL_FLASH_Lock(); return 0;
}
针对L412单片机,写入时是按FLASH_TYPEPROGRAM_DOUBLEWORD格式写入的,所以要8个地址++,这点要注意。