51 MCU + TM1620 drive 3-digit digital tube program

TM1620 is a diode driver chip produced by Tianwei Company, SOP20 package. The chip is shown in the figure below:

It can drive up to 6 8-bit digital tubes, as shown in the following figure:

The procedure is as follows:

/****************************************************** *
 * Name: STC51 drives TM1620 3-digit digital tube display
 * MCU: STC12C5608AD
 * Main frequency: 12Mhz (external 12MHz crystal oscillator)
 * Author: Ration
 * Date: December 5, 2013 (edited)
 * Copyright: Copyright belongs to "MCU Learning Network". Please keep integrity when disseminating.
 *
 * For more programs, please visit: http://www.rationmcu.com
 *************************************************/
#include "stc12c5608ad.h"
#include 

#define uint unsigned int // Macro definition uint (0~65535)
#define uchar unsigned char // 
#define uint32 unsigned long 


sbit STB =P3^2; // define chip select communication port
sbit CLK =P3^3; // Define the clock communication port
sbit DIO =P3^4; //Define data input/output communication port

uchar bai_num,shi_num,ge_num;


static uchar code LED_tab[11]={ //Define the digital code table of digital tube 0~9
0x3f, //0B00111111, //0
0x30, //0B00000110, //1
0x6d, //0B01011011, //2
0x79, //0B01001111, //3
0x33, //0B01100110, //4
0x5b, //0B01101101, //5
0x5f, //0B01111101, //6
0x70, //0B00000111, //7
0x7f, //0B01111111, //8
0x7B, //0B01101111, //9
0x4f, //E                                               
};

void delay_ms(uchar cyc)
{
    //When = 1, delay 1ms
    uchar ii,jj;

    for(jj=1;jj<=cyc;jj++)
    {
        for(ii=0;ii<200;ii++)
        {
            _nop_();
        }
    }
}


void TM1620_Write(uchar wr_data)
{
    uchar i;

    for(i=0;i<8;i++)
    {
        CLK = 0;
        if(wr_data&0x01)DIO = 1;
        else DIO = 0;
        CLK = 1;
        wr_data>>=1;
    }                 
}

void Write_COM(unsigned char cmd) //Send command word
{
    STB = 0;
    TM1620_Write(cmd);
    STB = 1;
}

void init_TM1620(void)
{
    Write_COM(0x44); // 01000000 ready to write data to the display register, normal mode, automatic address increase
    STB=0;
    TM1620_Write(0xc0); // 11000000 Set the display address to start from 0
    TM1620_Write(0x00); // All displays are off
    STB=1;
    STB=0;
    TM1620_Write(0xc2);
    TM1620_Write(0x00);
    STB=1;
    STB=0;
    TM1620_Write(0xc4);
    TM1620_Write(0x00);
    STB=1;
    Write_COM(0x8f); // Brightest 10001111 Set extinction pulse 14/16 Display on
}

void led_show()
{
// Write_COM(0x44); // 01000000 ready to write data to the display register, normal mode, automatic address increase
    STB=0;
    TM1620_Write(0xc0); // 11000000 Set the display address to start from 0
    TM1620_Write(LED_tab[bai_num]); // All displays are off
    STB=1;
    STB=0;
    TM1620_Write(0xc2); // 11000000 Set the display address to start from 0
    TM1620_Write(LED_tab[shi_num]); // All displays are off
    STB=1;    
    STB=0;
    TM1620_Write(0xc4); // 11000000 Set the display address to start from 0
    TM1620_Write(LED_tab[ge_num]); // All displays are off
    STB=1;
}





void main()
{
    CLK = 1; // Pull up the TM1620 communication clock pin
    STB = 1; // Pull up the TM1620 communication chip select pin
    DIO = 1; // Pull up the TM1620 communication data pin

    init_TM1620(); // Initialize the LED control chip
    bai_num=0;
    shi_num=0;
    ge_num=0;
    led_show();

    while(1)
    {
        ;
    }
}

Please obtain the complete Keil project file as follows!