42 Stepper Motor Control MCU Program

The following is a simulation diagram:

/********************************************Copyright (c)******************************************************                            

**                                     

** -----------------------------------------------------------------------------------------------------

** File Name : 

** Version : V1.0.0

** Description:                                 

* [External crystal]: 11.0592mhz        

* 【Main control chip】: STC89C52

* 【Compilation environment】: Keil μVisio4        

* 【Program functions】：                                                                                                    

* 【Instructions for use】: 

** -----------------------------------------------------------------------------------------------------

** Author : Creavalia

** Date : October 19, 2016

** -----------------------------------------------------------------------------------------------------

** Modify Person:

** Modify Date :

** Description:

*************************************************************************************************************/

// Includes --------------------------------------------------------------------------------------------

#include 

/********************************************************************************************************

** Marcos defines

*************************************************************************************************************/

#define MotorTabNum 5

unsigned char T0_NUM;

//IO settings

sbit K1 = P3^5; // Start

sbit K2 = P3^4; // reverse

sbit K3 = P3^3; // Acceleration

sbit K4 = P3^2; // deceleration

sbit FX = P2^4; // Direction

sbit MotorEn = P2^5; // Enable

sbit CLK = P2^6; // pulse

//----Digital Tube---------------

sbit SMG1 = P2^0; //definition of the first bit of digital tube

sbit SMG2 = P2^1; //Definition of the second bit of the digital tube

sbit SMG3 = P2^2; //Definition of the third bit of the digital tube

sbit SMG4 = P2^3; //Definition of the fourth bit of the digital tube

int table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}; //Common cathode digital tube segment value

//int table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,}; //Common anode digital tube segment value

unsigned char g_MotorSt = 0; // Start and stop

unsigned char g_MotorDir = 0; // forward and reverse

//unsigned char MotorTab[6] = {200, 160, 120, 80, 40, 20};

unsigned char MotorTab[6] = {12, 10, 8, 6, 4, 2};

//unsigned char MotorTab[6] = {6, 5, 4, 3, 2, 1};

signed char g_MotorNum = 0;

//--------------

void delayms(xms);

void mDelay(unsigned int DelayTime); //delay function

void T0_Init();

void KeyScan(void);

void Display(void);

// Main program main()

void main(void)

{

        unsigned char i;

        T0_Init(); // Timer 0 initialization

        MotorEn = 0; // L297 enable (only intelligent, can work normally, otherwise stop)

        FX = 0;

        while(1)

        {

                KeyScan(); // Button

                for(i=0; i<10; i++)

                Display();

        }

}

/********Timer initialization************************************************************/

void T0_Init()

{

        TMOD = 0x01;

        TH0 = (65535-100)/256; // 1ms

        TL0 = (65535-100)%256;

        EA = 1;

        ET0 = 1;

//TR0 = 1; 

}

/********Timer interrupt*****************/

void T0_time() interrupt 1

{

//TR0 = 0;

        TH0 = (65535-100)/256;   

        TL0 = (65535-100)%256;

        T0_NUM++;

        if(T0_NUM >= MotorTab[g_MotorNum]) // Increase key g_MotorNum++ Decrease key g_MotorNum--

        {

                T0_NUM = 0;

                CLK=CLK^0x01; // output pulse

        }

//TR0 = 1;

}         

//-----Button control---------------------

void KeyScan(void)

{

        if(K1 == 0)

        {

                delayms(5); // Software delay debounce

                if(K1 == 0)

                {

                        while(!K1){Display();}; 

                        g_MotorSt = g_MotorSt ^ 0x01;

                        MotorEn ^= 1;

                        TR0 = 1; 

                }

        }

        if(K2 == 0)

        {

                delayms(10); // Software delay debounce

                if(K2 == 0)

                {

                // while(!K2){Display();};        

                        g_MotorDir = g_MotorDir ^ 0x01;

                        FX^= 1;

                        while(!K2){Display();};        

                }

        }

        if(K3 == 0) // Accelerate

        {

                delayms(5); // Software delay debounce

                if(K3 == 0)

                {

                        while(!K3){Display();};        

                        g_MotorNum++;

                        if(g_MotorNum > MotorTabNum)

                                g_MotorNum = MotorTabNum;

                }

        }

        if(K4 == 0) // deceleration

        {

                delayms(5); // Software delay debounce

                if(K4 == 0)

                {

                        while(!K4){Display();};        

                        g_MotorNum--;

                        if(g_MotorNum < 0)

                                g_MotorNum = 0;

                }

        }

}

/**************************************************************************************

* Name: Set_Display()

* Function: Digital tube display function

* Input: None

* Output: None

* illustrate:

**********************************************************************************/

void Display(void)

{ 

        unsigned char b1, b2;

        b1=g_MotorNum/10;                

    b2=g_MotorNum%10;

        if(FX == 0)

                P0=0x71; //Display F

    else

                P0=0x79;

        SMG1=0;                                                         

    delayms(3);

    SMG1=1;

        P0=0x40;

    SMG2=0; //Display--

    delayms(3);

    SMG2=1;

        P0=table[b1];

        SMG3=0; //Display tens digit

        delayms(3);

        SMG3=1;

        P0=table[b2];

    SMG4=0;

    delayms(3); //display the units digit

    SMG4=1;

}

/************************************Delay function************************************************************/

void delayms(xms)

{

         unsigned int x,y;

         for(x=xms;x>0;x--)

                 for(y=110;y>0;y--);

}

/*************************************************************************************************************

** End Of File

****************************************************************************************************************/