C语言编写,用PIC16F690双机异步USART通信(收发全有).doc

C语言编写，用PIC16F690双机异步USART通信（收发全有）?? Post By：2008-9-18 10:33:00 我的这个程序是利用PIC16F690单片机编写的。要实现双机异步通信，用USART进行通信。目的是，让单片机A发送00~99到单片机B中，然后在单片机B链接一个LED数码管显示出00~99；与此同时，单片机A也同样链接一个LED数码管，显示发送出去的00~99.也就是让单片机A和B的数码管显示同样的00和99。我的程序如下，问题挺多，在下是新手，有点乱。请那位老师指点一下。发送程序：#include<pic.h>/*该程序实现PIC16F690单片机双机异步通信功能；该程序是发送部分（发送00~99），并在LED显示器上显示出发送的数据；*/#define PRESCALE1S??? 100??? ??? ??? //1s#define PRESCALE4MS??? 1??? ??? ??? //4msunsigned char Reg_L = 0;unsigned char Reg_H = 0; unsigned char IntFlag = 0;unsigned char tran[8];??? ??? ??? ??? //存储发送数据数组；const char NumTab[10] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0XD8,0x80,0x90};??? ??? ??? ??? ??? ??? ??? ??? ??? //不带小数点，共阳极显示0~9；unsigned int NumADD;unsigned int DispPreScale = PRESCALE1S;unsigned int DispPreScaleCnt = 0x00;/***函数名称：InitPort；***//***函数功能：I/O端口初始化；***/void InitPort(void){??? TRISA = 0x00;??? ??? //PORTA初始化；??? PORTA = 0x00;??? TRISB = 0x00;??? ??? //PORTB初始化；??? PORTB = 0x00;??? TRISC = 0x00;??? ??? //PORTC初始化；??? PORTC = 0x00;??? }/***函数名称：ASSIGN；***//***函数功能：给数组赋初值；***//*void ASSIGN(void){??? for(k=0;k<8;k++)??? {??? ??? tran[k] = k + 3;??? }}*//***函数名称：InitTMR1；***//***函数功能：定时器1初始化；***/void InitTMR1(void){??? T1CON = 0x30; ??? ??? //TMR1寄存器时钟为Fosc/4再经8分频；??? TMR1H = 0xFC;??? TMR1L = 0x18;??? ??? //4ms定时初始化值；??? TMR1IE = 1;??? ??? ??? //允许Timer1 溢出中断；???? TMR1ON = 1;??? ??? ??? //TMR1使能；??? }/***函数名称：InitDevice；***//***函数功能：对MCU各个功能初始化；***/void InitDevices(void){??? InitPort(); ??? ??? //端口初始化；??? InitTMR1();??? ??? ??? //TMR1定时器初始化；??? ??? BRGH = 1;??? ??? ??? //选择高速波特率；??? SPBRG = 103;??? ??? //晶振8M,异步，高速，19200BPS，误差0.16；??? ??? TXSTA = 0x04;??? ??? //8bit;??? RCSTA = 0x80;??? ??? //使能发送器；//??? TXIE = 0;??? ??? ??? //写中断标志位置1使能写中断；??? ??? ??? OSCCON = 0x70;??? ??? //振荡器选择为内部８Ｍ晶振;??? ??? ??? ??? ??? ??? //内部振荡器用作系统时钟；??? GIE = 1;??? ??? ??? //全局终端允许位；使能所有未屏蔽中断；??? PEIE = 1;??? ??? ??? //外设终端允许位；使能所有非屏蔽外设中断；??? ??? ANSEL = 0x00;??? ??? /