串口双机通讯程序的编写可以根据所使用的编程语言和开发环境有所不同。以下是几种不同编程语言的串口双机通讯程序示例:
汇编语言示例
```assembly
; 汇编语言实现双机串口通信
ORG 0000H
MOV TMOD, 20H ; 设置波特率
MOV TL1, 0FAH
MOV TH1, 0FAH
SETB TR1
MOV SCON, 40H ; 置工作方式1
CLR TI
MOV A, 00H
MOV SBUF, A ; 发送启动信号AA
WAIT: JBC TI, CONT ; 等待发送完毕
AJMP WAIT
CONT: SJMP STA ; 重复发送
END
```
C语言示例
```c
include include include include include include include include define uchar unsigned char define uint unsigned int uchar Rbuf = 0; uchar code dis_7[] = { 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71, 0x00 }; void delay(uint k) { uint i, j; for (i = 0; i < 200; i++) for (j = 0; j < 200; j++); } void display(uchar x) { P2 = x >> 4; P1 = x & 0x0F; delay(2); P2 = x >> 4; P1 = x & 0x0F; delay(2); } void UART() { if (TI) { Rbuf = SBUF; SBUF = 0xFF; TI = 0; } } void main(void) { uchar i; TMOD = 0x20; // 定时器T1工作于方式2 SCON = 0x50; // 串口工作方式1 PCON = 0x00; // 电源控制寄存器,波特率不加倍 TH1 = 0xFD; // 波特率为 9600 TL1 = 0xFD; TR1 = 1; // 启动定时器T1 while (1) { for (i = 0; i < 12; i++) { send(dis_7[i]); // 发送数据 delay(); delay(); delay(); } } } void send(uchar dat) { SBUF = dat; // 将待发送的数据写入发送缓存器中 while (TI == 0); // 只要接收中断标志位为0,即等待发送完毕 TI = 0; // 为了接收下一帧数据,需用软件将RI清零 } ``` Python示例 ```python import serial import time 配置串口 ser = serial.Serial(port='/dev/ttyUSB0', baudrate=9600, bytesize=8, parity='N', stopbits=1, timeout=1) 发送数据 def send_data(data): ser.write(data.encode()) 接收数据 def receive_data(): return ser.readline().decode().strip() 主程序 while True: send_data("Hello World!") time.sleep(1) print("Received:", receive_data()) ``` 建议 根据项目需求和选择合适的编程语言和环境: