两个单片机之间串口通信.doc

/*温度数据采集主机程序*/#include#include#include#define uint unsigned int#define uchar unsigned charsbit wds=P22;/温度传感器ds18b20uchar flag,i;uchar code table3;uint temp;/uint不用uchar，uchar范围不够大float f_temp;void initb20();/ds18b20初始化bit tempreadbit(void);uchar tempread(void);void tempwritebyte(uchar dat);void tempchange(void);bit tempreadbit(void);void tempwritebyte(uchar dat);void delayms(uint z)uint x,y;for(x=z;x0;x-)for(y=110;y0;y-);/*串行方式1发送模块*/void init()/*设置定时器1方式2*/TMOD=0x20;TH1=0XFD;/波特率设置为9600bpsTL1=0XFD;TR1=1; /*串口方式1*/SM0=0;SM1=1;PCON=0X80;ES=1;EA=1;initb20();/*发送子函数 */void send(uchar dat)SBUF=128+dat;while(!TI);TI=0; /*1602显示主机采集的数据*/*两个单片机通信接收端*/#include#define uint unsigned int#define uchar unsigned charsbit lcden=P25;sbit lcdrs=P27;sbit lcdrw=P26;void write_com(uchar com);void write_dat(uchar dat);uchar flag,a=b,d,e;uchar code table= ; void delayms(uint z)uint x,y;for(x=z;x0;x-)for(y=110;y0;y-);void LCD_init()lcden=0;write_com(0x38);write_com(0x0c);write_com(0x06);write_com(0x01);void write_com(uchar com)lcdrs=0;lcdrw=0;P0=com;delayms(5);lcden=1;delayms(5);lcden=0;void write_dat(uchar dat)lcdrs=1;lcdrw=0;P0=dat;delayms(5);lcden=1;delayms(5);lcden=0;void init()/*设置定时器1方式2*/TMOD=0x20;TH1=0XFD;/波特率设置为9600bpsTL1=0XFD;TR1=1;REN=1;/ /*串口方式1*/SM0=0;SM1=1;ES=1;EA=1;PCON=0X80;LCD_init(); void main() uchar i; init();write_com(0x80+0x05);write_dat(a);while(1)for(i=0;i3;i+)while(RI=0);RI=0;d=SBUF;e=(d-128)+0);if(i=0)write_com(0x80+0x40+i);write_dat(e);if(i=1)write_com(0x80+0x