利用NANO开发板编写
#define MAX_BUFFERSIZE 128 //自定义的缓冲buff长度
char uart_Receive_Buff [MAX_BUFFERSIZE]; //缓冲buff
unsigned int uart_Receive_Length = 0; //接收字节长度
unsigned long preUartTime = 0; //记录读取最好一个字节的时间点
unsigned int frame_Length = 5; //数据长度
unsigned int frame_Check_Begin = 1; //校验起始位
unsigned int frame_Inst_One = 2; //指令1
unsigned int frame_Inst_Two = 3; //指令2
unsigned int frame_Check_Length = 3; //校验长度
unsigned int frame_state = 0; //校验指令
unsigned int frame_inst1 = 0; //校验指令1
unsigned int frame_inst2 = 0; //校验指令2
bool task1_flag = false; //任务1标志位
bool task2_flag = false; //任务2标志位
bool task3_flag = false; //任务3标志位/*校验函数
*/
char checksum(char *p, int len)
{char sum = 0;while(len--){sum += *p;p++;}return sum;
}
/*串口发送函数
*/
void sendUART(const char *p, size_t len) {Serial.write(p, len);
}
/*预处理串口数据函数
*/
void uartDataProcess(char *p , int len)
{if ((len != frame_Length)&&(p != 0x34)) //不是目标长度{char testframebuf[1] = {0xFF};sendUART(testframebuf, 1);}else{if(checksum(&p[frame_Check_Begin],frame_Check_Length)!=p[len-1]){ char testframebuf1[2] = {0xFF ,0xFF};sendUART(testframebuf1, 2);}else{Serial.write(p, len);instructDataProcess(p , len);}}
}
/*指令处理函数
*/
void instructDataProcess(char *p , int len)
{frame_state = p[frame_Check_Begin];frame_inst1 = p[frame_Inst_One];frame_inst2 = p[frame_Inst_Two];if(frame_state == 1){if(frame_inst1 == 1)//0x34,0x01,0x01{char testframebuf2[3] = {0x01,0x01,0x00};sendUART(testframebuf2, 3);task1_flag = false;}else if(frame_inst1 == 2)//0x34,0x01,0x02{char testframebuf3[3] = {0x01,0x02,0x00};sendUART(testframebuf3, 3);task2_flag = false;}else if(frame_inst1 == 3)//0x34,0x01,0x03{char testframebuf4[3] = {0x01,0x03,0x00};sendUART(testframebuf4, 3);task3_flag = false;}}else if(frame_state == 2)//0x34,0x02,0x01{if(frame_inst1 == 1){char testframebuf5[3] = {0x02,0x01,0x01};sendUART(testframebuf5, 3);task1_flag = true;}else if(frame_inst1 == 2)//0x34,0x02,0x02{char testframebuf6[3] = {0x02,0x02,0x01};sendUART(testframebuf6, 3);task2_flag = true;}else if(frame_inst1 == 3)//0x34,0x02,0x03{char testframebuf7[3] = {0x02,0x03,0x01};sendUART(testframebuf7, 3);task3_flag = true;} }
}
/*指令处理函数
*/
void task1(void)
{char testframebuf8[3] = {0x11,0x11,0x11};sendUART(testframebuf8, 3);
}/*指令处理函数
*/
void task2(void)
{char testframebuf9[3] = {0x22,0x22,0x22};sendUART(testframebuf9, 3);
}/*指令处理函数
*/
void task3(void)
{char testframebuf10[3] = {0x33,0x33,0x33};sendUART(testframebuf10, 3);
}/*串口数据接受进程
*/
void doUartReceiveInit()
{if (Serial.available()){ uart_Receive_Buff [uart_Receive_Length++] = Serial.read();//读取串口数据preUartTime = millis(); //读取接收数据时间if (uart_Receive_Length >= MAX_BUFFERSIZE-1) { uart_Receive_Length = MAX_BUFFERSIZE-2;preUartTime = preUartTime - 200;}}if (uart_Receive_Length > 0 && (millis() - preUartTime >= 100)) //最后一个字节后超过100ms数据处理{ uart_Receive_Buff [uart_Receive_Length] = 0x00;//处理串口数据Serial.flush();uartDataProcess(uart_Receive_Buff, uart_Receive_Length);//执行串口数据处理函数uart_Receive_Length = 0;}
}
/*处理串口数据函数，可以在函数内编写处理函数数据的程序
*/
void setup() {Serial.begin(115200);
}
/*处理串口数据函数，可以在函数内编写处理函数数据的程序
*/
void loop()
{doUartReceiveInit(); //调用串口数据处理进程if(task1_flag == true){task1();}else if(task2_flag == true){task2();}else if(task3_flag == true){task3();}
}