串口通信

串口发送

#include 

#define uint unsigned int
#define uchar unsigned char

void delay(uint timer)
{       
    uchar j = 124;
    while(timer--)
    {
        while(j--);
    }
}

void timer1_init()
{
        TMOD = 0x20;
        TL1 = 0xFD;
        TH1 = 0xfd;
        TR1 = 1;
}

void serial_init()
{
        PCON = 0;
        SCON = 0X40;
}

void main()
{   
        uchar send_data = 0;
        uchar i = 0;
        
        timer1_init();
        serial_init();
        
        IE = 0x00;
        while(1)
        {
                send_data = 'A';
                for(i=0;i<26;i++)
                {
                SBUF = send_data;
                while(TI==0);
                TI=0;
                send_data ++;
                delay(100);
                }
                delay(3000);
        }
}

串口收发

串口收发

#include 

#define uint unsigned int
#define uchar unsigned char

void timer1_init()
{
        TMOD = 0x20;
        TL1 = 0xFD;
        TH1 = 0xfd;
        TR1 = 1;
}

void serial_init()
{
        PCON = 0X80;
        SCON = 0X50;
}

void main()
{   
        uchar tmp_data = 0;
    
        timer1_init();
        serial_init();
        
        IE = 0x00;
        while(1)
        {
                while(RI==0);
                RI=0;
                tmp_data = SBUF;
            
                tmp_data+=32;
                SBUF = tmp_data;
                while(TI==0);
                TI=0;
        }
}

串口中断实现收发

串口中断实现收发

#include 

#define uint unsigned int
#define uchar unsigned char

void timer1_init()
{
        TMOD = 0x20;
        TL1 = 0xFD;
        TH1 = 0xfd;
        TR1 = 1;
}

void serial_init()
{
        PCON = 0X80;
        SCON = 0X50;
    
        ES = 1;
}

void main()
{   
        uchar tmp_data = 0;
    
        timer1_init();
        serial_init();
        
        EA=1;
        while(1)
        {
                ;
        }
}

void serial_inter() interrupt 4
{
        uchar tmp_data = 0;
        
        if(RI==1)
        {
                RI = 0;
                tmp_data = SBUF;
                
                tmp_data += 32;
                SBUF = tmp_data;
        }
        
        if(TI==1)
        {
            TI=0;
        }
}

深入串口通信

深入串口通信

delay.h

#include 

#ifndef  _DELAY_H
#define _DELAY_H

void delay(uint timer);

#endif

delay.c

#include "main.h"

void delay(uint timer)
{
    uchar j = 124;
    while(timer--)
    {
        while(j--);
    }
}

display.h

#ifndef _DISPLAY_H
#define _DISPLAY_H value

void disp_num(void);
void horse_led(void);
#endif

display.c

#include "reg51.h"
#include "main.h"
#include "delay.h"

uchar code seg[] = {0xC0,0xF9,0xA4,0xB0,0x99,
                    0x92,0x82,0xF8,0x80,0x90,
                    0xff,0x0c};


void disp_num()
{
    uchar i = 0;

    for (i = 0; i < 10; i++)
    {
        P0 = seg[i];
        delay(500);
    }
}

void horse_led(void)
    {
        uchar i = 0;
        for(i = 0; i < 8; i++)
        {
            P1 = ~(1<

serial.h

#ifndef _SERIAL_H
#define _SERIAL_H value

void deal_protocol(void);

#endif

serial.h

#include 
#include "main.h"

uchar g_pSendBUFF[6];
uchar g_pRecvBUFF[6];
extern uchar g_ucRecvNum;
extern uchar g_ucStat;

void serial_inter() interrupt 4
{
    static uchar sSendNum = 0;
    uchar tmp = 0;

    if(RI == 1)
    {
        RI = 0;
        tmp = SBUF;
        if(g_ucRecvNum==0&&tmp==0xeb)
        {
            g_pRecvBUFF[0] = tmp;
            g_ucRecvNum++;
        }else
        {
            if (g_ucRecvNum > 0)
            {
                g_pRecvBUFF[g_ucRecvNum] = tmp;
                g_ucRecvNum++;
            }
        }
//      RI = 0;
//              tmp = SBUF;

//              SBUF = g_pRecvBUFF[g_ucRecvNum];
    }
    if (TI == 1)
    {
        TI = 0;
        sSendNum++;
        if (sSendNum < 6)
        {
            SBUF = g_pSendBUFF[sSendNum];
        } else {
            sSendNum = 0;
        }
    }
}


void deal_protocol(void)
{
    uchar chk_sum = 0;
    
    if (g_ucRecvNum >= 6)
    {
        g_ucRecvNum = 0;
        if(g_pRecvBUFF[1] != 0x06)
        {
            return;
        }
        if(g_pRecvBUFF[5] != 0x90)
        {
            return;
        }

        chk_sum = g_pRecvBUFF[1] + g_pRecvBUFF[2] + g_pRecvBUFF[3];
        if (chk_sum != g_pRecvBUFF[4])
        {
            return;
        }

        if(g_pRecvBUFF[2] == 0x01)
        {
            switch(g_pRecvBUFF[3])
            {
                case 1:
                    g_ucStat  = 1;
                    g_pSendBUFF[2] = 0x01;
                    g_pSendBUFF[3] = 0;
                    break;

                case 2:
                    g_ucStat = 2;
                    g_pSendBUFF[2] = 0x01;
                    g_pSendBUFF[3] = 0;

                default:
                    break;
            }   
        } else 
        {
            g_pSendBUFF[2] = 0x02;
            g_pSendBUFF[3] = g_ucStat;
        }

        g_pSendBUFF[0] = 0xeb;
        g_pSendBUFF[1] = 0x06;
        g_pSendBUFF[4] = g_pSendBUFF[1] + g_pSendBUFF[2] + g_pSendBUFF[3];
        g_pSendBUFF[5] = 0x90;
        SBUF = g_pSendBUFF[0];
    }
}