UART.rar_源码

#include "Regx52.h" #include "intrins.h" #define uchar unsigned char #define uint unsigned int #define ulong unsigned long #define MCLK 11059200L // MCLK frequency in Hz #define BAUDRATE 19200 // Baud rate of UART in bps unsigned char RevBuf; //接收缓存变量 /*-----------sfr init------------*/ void SerialInit(void) { EA = 0; SCON = 0x50; // SCON0: mode 1, 8-bit UART, enable RX PCON |= 0x80; // SMOD00 = 1 TMOD = 0x20; // TMOD: timer 1, mode 2, 8-bit reload TH1 = -(MCLK/BAUDRATE/12/16); // set Timer1 reload value for baudrate TL1 = -(MCLK/BAUDRATE/12/16); // set Timer1 reload value for baudrate TR1 = 1; // start Timer1 // ES = 1; // enable UART0 interrupts EA = 1; } /* //Receive Char "串口中断方式接收数据" //功能：接收到数据之后再发送出去 void UART_INTR_SVC(void) interrupt 4 using 3 { if(RI==1) { RI=0; RevBuf=SBUF; SBUF=RevBuf; } else TI=0; }*/ void main(void) { uchar data m; //定义循环变量 SerialInit(); //初始化串口 for(m=0;m<8;m++) { SBUF = m+0x30; while(TI!=1); TI=0;//向PC发送ASCII：01234567 } for(;;) { while(RI!=1); RI=0; RevBuf=SBUF;//查询方式接收数据 SBUF=RevBuf;//原数据返回 while(TI!=1); TI=0; } }