keil软件uart头文件

#include "uart.h" unsigned char ostart; unsigned char oend; char idata outbuf[OLEN]; unsigned char istart; unsigned char iend; char idata inbuf[ILEN]; bit bdata sendfull; bit bdata sendactive; /*串行中断服务程序*/ static void com_isr(void) interrupt 4 using 1 //串口中断 { //-------------接收数据中断-------------- char c; if(RI) { c=SBUF; RI=0; if(istart+ILEN!=iend) { inbuf[iend++&(ILEN-1)]=c; } } //-------------发送数据中断-------------- if(TI) { TI=0; if(ostart!=oend) { SBUF=outbuf[ostart++&(OLEN-1)]; sendfull=0; } else { sendactive=0; } } } //PUTBUF: 写字符到SBUF或发送缓冲区 void putbuf(char c) { if(!sendfull) { if(!sendactive) { sendactive=1; SBUF=c; } else { ES=0; outbuf[oend++&(OLEN-1)]=c; if(((oend^ostart)&(OLEN-1))==0) { sendfull=1;} ES=1; } } } //替换标准库函数putchar程序 //printf函数使用putchar输出一个字符 char putchar (char c) { if (c=='\n') { while(sendfull); putbuf(0x0D); } while(sendfull); putbuf(c); return(c); } //替换标准库函数_getkey程序 //getchar和gets函数使用_getkey char _getkey(void) { char c; while(iend==istart) {;} ES=0; c=inbuf[istart++&(ILEN-1)]; ES=1; return(c); } /* 初始化串行口和UART波特率函数*/ void com_initialize(void) { istart=0; iend=0; ostart=0; oend=0; sendactive=0; sendfull=0; TMOD |=0x20; //T/C1工作在方式2 TH1=0xfd; TR1=1; SCON=0xd8; ES=1; } void uart_Init() { com_initialize(); EA=1; }