Single chip microcomputer stepper motor speed control program (speed LED display)

The microcontroller source program is as follows:

//Digital tube high position------low position

//Four buttons to control the stepper motor: forward, reverse, plus 1, minus 1

//When the power is on, the motor starts, and the digital tube displays the minimum speed gear 1. The plus and minus gears can be displayed through the digital tube. The motor adopts single and double eight-beat mode.

//There are 10 motor speeds in total, and the speed can be adjusted by pressing the button 

//When the motor rotates forward, the highest digital tube displays 0, and when it rotates reverse, it displays 1  

#include

#define uchar unsigned char

#define uint unsigned int

#define led P0 //digital tube segment selection

#define haha ​​P2

sbit s1 = P1^0;

sbit s2 = P1^1;

sbit s3 = P3^0;

sbit s4 = P3^1;

sbit s5 = P3^2; //button definition, s1 forward, s2 reverse, s3 plus 1, s4 minus 1

sbit wei3 = P2^3;sbit wei2 = P2^2;sbit wei1 = P2^1;sbit wei0 = P2^0;//digital tube bit selection definition

sbit a = P2^7;sbit b = P2^6;sbit c = P2^5;sbit d = P2^4; // Definition of pulse signal input terminal

uchar code tab[11]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff}; // Common anode digital tube drive signal 0---9, no display

uchar code time_counter[10][2]={{0xda,0x1c},{0xde,0xe4},{0xe1,0xec},{0xe5,0xd4},{0xe9,0xbc}, //9.7 ----1ms

                                                            {0xed,0xa4},{0xf1,0x8c},{0xf5,0x74},{0xf9,0x5c},{0xfc,0x18}};

uchar code qudong[8]={0x80,0xc0,0x40,0x60,0x20,0x30,0x10,0x90};         

uchar num1 = 0; //Control the excitation signal variable                                                  

uchar num2 = 8;

char k=0; //Addition and subtraction gear control, 1 is the minimum gear

char pause=1; //Save the previous speed when paused, the default setting is 1 when powered on

bit flag1 = 0; //initial forward, forward and reverse rotation flag

uchar buf[4]={0,10,0,0}; //digital tube display cache, forward, no display, no display, display 1 gear, high----low  

//=================================Timer 0/1 initialization function=================================

void T0_T1_init()

{

        TMOD = 0x11; //Timer 0/1 both work in mode 1, 16-bit timing mode

           TH1 = time_counter[k-1][0];

        TL1 = time_counter[k-1][1]; //Timer 1, 10ms timing for stepper motor speed control

        TR1 = 0;

        ET1= 1; // Enable timer interrupt

        EA = 1; // Enable general interrupt

}

//==================================ms level delay function======================================

void delay1m(uint x)

{

    uint i,j;

    for(i=0;i             for(j=0;j<120;j++); //Count 120 times, about 1 ms

} 

void display()

{

        wei3=1;wei2=1;wei1=1;wei0=0;led = tab[buf[3]];delay1m(1);led=0xff;

    wei3=1;wei2=1;wei1=0;wei0=1;led = tab[buf[2]];delay1m(1);led=0xff;

    wei3=1;wei2=0;wei1=1;wei0=1;led = tab[buf[1]];delay1m(1);led=0xff;

        wei3=0;wei2=1;wei1=1;wei0=1;led = tab[buf[0]];delay1m(1);led=0xff;

}

//==================================Main function==============================================

void main()

{

        T0_T1_init();

        buf[1] = 10; // not displayed

        while(1)

        {

                display();

                if(s1 == 0)

                {

                        delay1m(3);

                        if(s1 == 0)

                        {

                                flag1 = 0; //Forward

                                buf[0] = 0; //The highest bit displays 0

                // haha ​​= 0x00; // stop

                        }

                        while(!s1) display();

                }

                if(s2 == 0 )

                {

                        delay1m(3);

                        if(s2 == 0)

                        {

                                flag1 = 1; // reverse

                                buf[0] = 1; //The highest bit displays 1

                // haha ​​= 0x00; // stop

                        }

                        while(!s2) display();

                }

                if(s3 == 0) //speed up 1 level

                {

                        delay1m(3);

                        if(s3 == 0)

                        {

                                k++;

                                TR1=1;

                                if(k > 10 )

                                {

                                        k = 1;

                                }

                                buf[2]= k/10;

                                buf[3]= k%10;

                        } 

                        while(!s3) display();

                }

                if(s4 == 0) //Speed ​​reduction by 1 level

                {

                        delay1m(3);

                        if(s4 == 0)

                        {

                                k--;

                                TR1=1;

                                if(k <= 0)

                                {

                                        k = 10;

                                }

                                buf[2]= k/10;

                                buf[3]= k%10;

                        }

                        while(!s4) display();

                }

                if(s5==0)

                {

                        delay1m(3);

                        if(s5==0)

                        {

                                if(TR1==1)

                                {

                                        pause=k;

                                        k=0;

                                        TR1=0;

                                        a=b=c=d=0;

                                }

                                else if(TR1==0)

                                {

                                        k=pause;

                                        TR1=1;

                                }

                                buf[2]= k/10;

                                buf[3]= k%10;

                                while(!s5) display();

                        }

                }

        } 

}

//===================================Timer 1 interrupt function, used for pulse frequency control======================================

void time1_interrupt()interrupt 3

{        

        static num1 = 0;

        static num2 = 0;

        TH1 = time_counter[k-1][0];

        TL1 = time_counter[k-1][1]; //Timer 1, timing 1 is used for stepper motor speed control

        if(flag1 == 0) //Forward

        {

                switch(num1)

                {

                        case 0:a = 1;b = 0;c = 0;d = 0;break;

                        case 1:a = 1;b = 1;c = 0;d = 0;break;

                        case 2:a = 0;b = 1;c = 0;d = 0;break;

                        case 3:a = 0;b = 1;c = 1;d = 0;break;

                        case 4:a = 0;b = 0;c = 1;d = 0;break;

                        case 5:a = 0;b = 0;c = 1;d = 1;break;

                        case 6:a = 0;b = 0;c = 0;d = 1;break;

                        case 7:a = 1;b = 0;c = 0;d = 1;break;

                }

                num1++;

                if(num1 == 8)num1 = 0; 

        }

        else //reverse

        {

                switch(num2)

                {

                        case 0:a = 1;b = 0;c = 0;d = 1;break;

                        case 1:a = 0;b = 0;c = 0;d = 1;break;

                        case 2:a = 0;b = 0;c = 1;d = 1;break;

                        case 3:a = 0;b = 0;c = 1;d = 0;break;

                        case 4:a = 0;b = 1;c = 1;d = 0;break;

                        case 5:a = 0;b = 1;c = 0;d = 0;break;

                        case 6:a = 1;b = 1;c = 0;d = 0;break;

                        case 7:a = 1;b = 0;c = 0;d = 0;break;

                }

                num2++;

                if(num2 == 8)num2 = 0;         

        }

}

1. This design uses STC89C51/52 (compatible with AT89S51/52, AT89C51/52, optional) microcontroller as the main controller;

· 2. The motor uses a DC-5V stepper reduction motor (step angle 5.625°, reduction ratio 1/64);

3. Integrated chip ULN2003 as motor driver;

4. Button functions: Button 1 forward, Button 2 reverse, Button 3 speed up, Button 4 speed down, Pause/Start

· 5. The first digit of the LED digital tube displays the forward and reverse rotation of the motor, and the third and fourth digits display the gear number of the motor running speed;

6. Five red LEDs, one for power indication and four for motor speed indication.   

     Partial Program

//Digital tube high position------low position

//Four buttons to control the stepper motor: forward, reverse, plus 1, minus 1

//When the power is on, the motor starts, and the digital tube displays the minimum speed gear 1. The plus and minus gears can be displayed through the digital tube. The motor adopts single and double eight-beat mode.

//There are 10 motor speeds in total, and the speed can be adjusted by pressing the button

//When the motor rotates forward, the highest digital tube displays 0, and when it rotates reverse, it displays 1  

#include

#define uchar unsigned char

#define uint unsigned int

#define led P0 //digital tube segment selection

#define haha ​​P2

sbit s1 = P1^0;

sbit s2 = P1^1;

sbit s3 = P3^0;

sbit s4 = P3^1;

sbit s5 = P3^2; //button definition, s1 forward, s2 reverse, s3 plus 1, s4 minus 1

sbit wei3 = P2^3;sbit wei2 = P2^2;sbit wei1 = P2^1;sbit wei0 = P2^0;//digital tube bit selection definition

sbit a = P2^7;sbit b = P2^6;sbit c = P2^5;sbit d = P2^4; // Definition of pulse signal input terminal

uchar code tab[11]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff}; // Common anode digital tube drive signal 0---9, no display

uchar code time_counter[10][2]={{0xda,0x1c},{0xde,0xe4},{0xe1,0xec},{0xe5,0xd4},{0xe9,0xbc}, //9.7 ----1ms