A serial port data receiving mode of stm32

Project requirements control 12 Circuit solenoid valve , Control frame format of solenoid valve Header frame 0xFB , Data bits xxx, Tail frame 0xFB. The following implementation is made in the serial port interrupt callback function .

uint8_t start_Flag=0;// Data start flag bit 

uint8_t cont=0;// Data count digit 

uint8_t RX_Buff[16];// Data caching 

uint8_t flash_Fiag=0;// Data acceptance complete 

// Serial interrupt callback function 
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    
	if(huart->Instance==USART1)
	{
    
		if(temp==0xFB)// Start frame 
		{
    
			start_Flag=1;
			RX_Buff[cont++]=temp;
		}
		else if(temp==0xBF)// End frame 
		{
    
			start_Flag=0;
			RX_Buff[cont]=temp;
			flash_Fiag=1;
			cont=0;
		}
		else// Process frame 
		{
    
				if(start_Flag==1)
				{
    
					RX_Buff[cont++]=temp;
					if(cont>=16)// Data overflow detection 
					{
    
						start_Flag=0;
					}
				}
		}
	}
	HAL_UART_Receive_IT(huart,&temp,1);// You need to turn on the receive interrupt at the end of each reception 
}

Clear accept buffer data

void clean_RX_Data(void)
{
    
	for(int i=0;i<16;i++)
	{
    
		 RX_Buff[i]=0;
	}
}

Main circulation while（1） Add the following functions to the , After improvement, a timer can be used to receive data , Every time 50ms Receive primary data .

		if(flash_Fiag==1)// A timer can be used to detect data acceptance   If the data is accepted 
		{
    
			flash_Fiag=0;
			for(int i=0;i<16;i++)
			{
    
				final_Data[i]=RX_Buff[i];
			}
			clean_RX_Data();
		}

Experimental phenomena ： Apollo F429 test , Send header and footer , The returned data is consistent with the sent data .

Project development ： On this basis , You can go directly through final_Data[i] Make corresponding control judgment on the array elements in the ！！！