2023年12月30日发(作者：苹果ipad3参数)
void RS485_Receive_data(uint8_t *pdata,uint16_t data_size){ while(HAL_UART_GetState(&huart2)!=HAL_UART_STATE_READY); HAL_UART_Receive_DMA(&huart2,pdata,data_size);}主程序测试：int main(void)
{ HAL_Init(); Sysclk_config(); USART2_UART_Init(38400); RS485_Send_data(buffer1,data_length); HAL_UART_Receive_DMA(&huart2,buffer2,data_length); //打开DMA接收 while(1) {
if(flag==1) { HAL_Delay(200); RS485_Send_data(buffer2,data_length); flag=0; HAL_UART_Receive_DMA(&huart2,buffer2,data_length);//打开DMA接收
} }}void USART2_IRQHandler(void){ HAL_UART_IRQHandler(&huart2);}void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart){ if(huart==&huart2) { flag=1; }}void DMA1_Stream6_IRQHandler(void){ HAL_DMA_IRQHandler(&huart2_dma_tx);}void DMA1_Stream5_IRQHandler(void){ HAL_DMA_IRQHandler(&huart2_dma_rx);}
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