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;}}}