80C51的串行口结构和原理（2-程序）

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#include<reg52.h>#include "./delay/delay.h"#include<stdio.h>//串口中断的初始化void uart_init(){SCON = 0x50;  //设置uart工作方式  “8N1”TMOD = 0x20;  //设置定时器工作方式为8位，用作串口波特率TH1 = 0xfd;   //填初值TR1 = 1;      //打开定时器}//发送一个字节void uart_send_byte(unsigned char byte){SBUF = byte;while(!TI);     //自动置1，手动置0，发送标志位TI = 0;}

//发送字符串void uart_send_str(unsigned char *s){while(*s != '\0'){uart_send_byte(*s);s++;}}void main(){//unsigned char temp;uart_init();while(1){if(RI){uart_send_str("hengzhe shi wo er");uart_send_byte(SBUF);delay_ms(200);RI = 0;}TI = 1;printf("hengzheshiwo erzi\n");printf("line is %d\n",(unsigned int)__LINE__);// if(RI)// {// temp = SBUF;//   P0 = temp;// delay_ms(50);//   RI = 0;// }//uart_send_byte(0x55);//delay_ms(50);}}

串口每次发送最低位

//后续截图次日补上

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