STM32 串口收发数据包

接线图

HEX数据包接收

文本数据包接收

代码配置

发送HEX数据包

//存储发送或接收的载荷数据
uint8_t TX_Packet[4];
uint8_t RX_Packet[4];

void Serial_SendPacket(void)
{
	Serial_SendByte(0xFF);//发送包头
	Serial_SendArray(TX_Packet, 4);//发送4个载荷数据
	Serial_SendByte(0xFE);//发送包尾
	
	
}

主函数

#include "USART.h"
int main(void)
{
	OLED_Init();
	USART_Config();
	TX_Packet[0] = 0x01;
	TX_Packet[1] = 0x02;
	TX_Packet[2] = 0x03;
	TX_Packet[3] = 0x04;
	Serial_SendPacket();
	while(1)
	{
		
		
	}
	
	
}

接收HEX数据包

需要在中断函数里写

//存储发送或接收的载荷数据
uint8_t TX_Packet[4];
uint8_t RX_Packet[4];

//中断函数
void USART1_IRQHandler(void)
{
	static uint8_t RX_State = 0;
	static uint8_t pRX_Packet = 0;
	//判断中断标志位
	if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET)
	{
		RX_Data = USART_ReceiveData(USART1);//读取数据寄存器，并存放在数据变量里
		if(RX_State == 0)
		{
			//如果接收到了包头
			if(RX_Data == 0xFF)
			{
				RX_State = 1;
				pRX_Packet = 0;
			}
		}
		else if(RX_State == 1)
		{
			RX_Packet[pRX_Packet] = RX_Data;//将RX_Data存在接收数组里
			pRX_Packet++;
			if(pRX_Packet >= 4)
			{
				RX_State = 2;
			}
		}
		else if(RX_State == 2)
		{
			//判断是不是包尾
			if(RX_Data == 0xFE)
			{
				RX_State = 0;
				RX_Flag = 1;//标志位置1
			}
		}
		
		//清除标志位
		USART_ClearITPendingBit(USART1, USART_IT_RXNE);
	}
	
}

主函数

#include "USART.h"
int main(void)
{
	OLED_Init();
	USART_Config();
	TX_Packet[0] = 0x01;
	TX_Packet[1] = 0x02;
	TX_Packet[2] = 0x03;
	TX_Packet[3] = 0x04;
	Serial_SendPacket();
	while(1)
	{
		if(Serial_GetRXFlag() == 1)
		{
			OLED_ShowHexNum(1, 1, RX_Packet[0], 2);
			OLED_ShowHexNum(1, 4, RX_Packet[1], 2);
			OLED_ShowHexNum(1, 7, RX_Packet[2], 2);
			OLED_ShowHexNum(1, 10,RX_Packet[3], 2);
		}
		
	}
	
	
}

按键控制

int main(void)
{
	KEY_Init();
	OLED_Init();
	USART_Config();
	TX_Packet[0] = 0x01;
	TX_Packet[1] = 0x02;
	TX_Packet[2] = 0x03;
	TX_Packet[3] = 0x04;
	OLED_ShowString(1, 1, "TXPacket");
	OLED_ShowString(3, 1, "RXPacket");
	while(1)
	{
		if(KEY_Scanf(GPIOB, GPIO_Pin_0) == 1)
		{
				TX_Packet[0]++;
				TX_Packet[1]++;
				TX_Packet[2]++;
				TX_Packet[3]++;
				Serial_SendPacket();
			OLED_ShowHexNum(2, 1, TX_Packet[0], 2);
			OLED_ShowHexNum(2, 4, TX_Packet[1], 2);
			OLED_ShowHexNum(2, 7, TX_Packet[2], 2);
			OLED_ShowHexNum(2, 10,TX_Packet[3], 2);
		}
		if(Serial_GetRXFlag() == 1)
		{
			OLED_ShowHexNum(4, 1, RX_Packet[0], 2);
			OLED_ShowHexNum(4, 4, RX_Packet[1], 2);
			OLED_ShowHexNum(4, 7, RX_Packet[2], 2);
			OLED_ShowHexNum(4, 10,RX_Packet[3], 2);
		}
		
	}

发送与接收文本数据包

char RX_Packet2[100];

//中断函数
void USART1_IRQHandler(void)
{
	static uint8_t RX_State = 0;
	static uint8_t pRX_Packet = 0;
	//判断中断标志位
	if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET)
	{
		RX_Data = USART_ReceiveData(USART1);//读取数据寄存器，并存放在数据变量里
		if(RX_State == 0)
		{
			//如果接收到了包头
			if(RX_Data == '@' && RX_Flag == 0)
			{
				RX_State = 1;
				pRX_Packet = 0;
			}
		}
		else if(RX_State == 1)
		{
			//判断是不是第一个包尾
			if(RX_Data == '\r')
			{
				RX_State = 2;
			}
			else
			{
				RX_Packet2[pRX_Packet] = RX_Data;//将RX_Data存在接收数组里
				pRX_Packet++;
			}
		}
		else if(RX_State == 2)
		{
			//判断是不是第二个包尾
			if(RX_Data == '\n')
			{
				RX_State = 0;
				RX_Packet2[pRX_Packet] = '\0';//加结束标志位
				RX_Flag = 1;//标志位置1
			}
		}
		
		//清除标志位
		USART_ClearITPendingBit(USART1, USART_IT_RXNE);
	}
	
}

主函数：

int main(void)
{
	
	OLED_Init();
	LED_Init();
	USART_Config();
	OLED_ShowString(1, 1, "TXPacket");
	OLED_ShowString(3, 1, "RXPacket");
	while(1)
	{
		if(RX_Flag == 1)
		{
			OLED_ShowString(4, 1, "            ");
			OLED_ShowString(4, 1, RX_Packet2);
			
			if(strcmp(RX_Packet2, "LED_ON") == 0)
			{
				LED2(0);
				Serial_SendString("LED_ON_OK\r\n");
				OLED_ShowString(2, 1, "           ");
				OLED_ShowString(2, 1, "LED_ON_OK");
			}
			else if(strcmp(RX_Packet2, "LED_OFF") == 0)
			{
				LED2(1);
				Serial_SendString("LED_OFF_OK\r\n");
				OLED_ShowString(2, 1, "            ");
				OLED_ShowString(2, 1, "LED_OFF_OK");
			}
			else
			{
				Serial_SendString("ERROR_COMMAND\r\n");
				OLED_ShowString(2, 1, "              ");
				OLED_ShowString(2, 1, "ERROR_COMMAND");
			}
			RX_Flag = 0;
		}
		
	}
	
	
}