uart_test.rar_uart传送字节

#include<reg51.h> #include<intrins.h> #define uchar unsigned char #define uint unsigned int //1602液晶显示控制，数据输出为P0口 sbit RS=P2^0; sbit RW=P2^1; sbit EN=P2^2; //1602显示寄存器1、2 uchar LCD_DSY_BUFFER1[16]; uchar LCD_DSY_BUFFER2[16]; sbit LED=P1^1; sbit LED2=P1^2; sbit LED3=P1^3; sbit LED4=P1^4; uchar node=0; //用于记录当前接收数据的帧数 uchar buffer[4]; //用于记录当前接收的数据 //-------------------------------------------------- // 延时 //-------------------------------------------------- void DelayMS (uint ms) { uchar i; while(ms--) for(i=0;i<120;i++); } //-------------------------------------------------- // 忙检查 //-------------------------------------------------- uchar Busy_check() { uchar LCD_Staus; RS=0; RW=1; EN=1; //开始读 DelayMS(1); LCD_Staus=P0; EN=0; return LCD_Staus; } //-------------------------------------------------- // 写LCD指令 //-------------------------------------------------- void Write_LCD_Command(uchar cmd) { while((Busy_check()&0x80)==0x80);//一直等到最高位为1 RS=0; RW=0; //写入 EN=0; P0=cmd; EN=1; DelayMS(1); EN=0; } //-------------------------------------------------- // 发送数据 //-------------------------------------------------- void Write_LCD_Data(uchar dat) { while((Busy_check()&0x80)==0x80);//一直等到最高位为1 RS=1; //数据寄存器 RW=0; //写入 EN=0; P0=dat; EN=1; DelayMS(1); EN=0; } //-------------------------------------------------- // LCD初始化 //-------------------------------------------------- void Init_LCD() { Write_LCD_Command(0x38); //输出为8位，两行显示，5*7点阵 DelayMS(1); Write_LCD_Command(0x01); //清屏 DelayMS(1); Write_LCD_Command(0x06); //字符进入显示模式，屏幕不动，字符后移 DelayMS(1); Write_LCD_Command(0x0C); //开显示，关光标 DelayMS(1); } //-------------------------------------------------- // 显示函数 //-------------------------------------------------- void Display_LCD_String(uchar x,uchar y,uchar *str) { uchar i=0; // 设置显示起始位置 if(y==0) Write_LCD_Command(0x80|x); if(y==1) Write_LCD_Command(0x86|x); //输出字符串 for (i=0;i<16;i++) { Write_LCD_Data(str[i]); DelayMS(1); } } //-------------------------------------------------- //串口接收中断函数 //-------------------------------------------------- void Serial_INT() interrupt 4 { if(RI) { RI=0; buffer[node]=SBUF; node++; if(buffer[3]==29) LED=0; if(node==4) EA=0; } } //------------------------------------------------ //主程序 //------------------------------------------------ void main() { uchar i; unsigned long int result=0; uchar buffer2[4]; Init_LCD(); for(i=0;i<16;i++) { LCD_DSY_BUFFER2[i]=' '; } Display_LCD_String(0x00,0," NUMBER TO SHOW "); SCON=0x50; //串口模式1,8位异步，允许接收 TMOD=0x20; //T1工作在模式2,8位自动装载 TH1=0xFD; //波特率设定为9600 TL1=0xFD; PCON=0x00; //波特率不倍增 IE=0x90; //允许串行中断 TI=0; RI=0; TR1=1; while(1) { if(node==4) { node=0; buffer2[0]=buffer[3]; //数据映射 buffer2[1]=buffer[0]; buffer2[2]=buffer[1]; buffer2[3]=buffer[2]; for(i=0;i<4;i++) { result=result*256+buffer2[i]; } for(i=0;i<10;i++) { LCD_DSY_BUFFER2[15-i]=result%10+'0'; result=result/10; if(result==0) break; } Display_LCD_String(0x40,0,LCD_DSY_BUFFER2); EA=1; } } }