Use C language to write the forward and reverse angle program of single-chip microcomputer driven stepper motor

The following is a simple example to realize the forward and reverse angle control of the stepper motor:

```c
#include <reg51.h>

#define MOTOR_PORT P1 // Control port of the stepper motor

// Define the forward and reverse stepping motor sequence
unsigned char forward_seq[4] = {0x01, 0x02, 0x04, 0x08};  
unsigned char backward_seq[4] = {0x08, 0x04, 0x02, 0x01};

// Define the angle conversion function, modify the
unsigned char angle_to_step(unsigned int angle)  
{     return angle / 1.8; // take 1.8 degrees as the unit }

// Define forward and reverse function
void motor_forward(unsigned char step)
{     unsigned char i, j;     for (i = 0; i < step; i++) {         for (j = 0; j < 4; j++) {             MOTOR_PORT = forward_seq [j];             delay(); // Delay for a period of time to make the stepper motor rotate to the specified angle         }     } }

void motor_backward(unsigned char step)
{     unsigned char i, j;     for (i = 0; i < step; i++) {         for (j = 0; j < 4; j++) {             MOTOR_PORT = backward_seq[j];             delay() ; // Delay for a period of time to make the stepper motor rotate to the specified angle         }     } }

// main function
int main()
{     unsigned int angle; // angle variable     unsigned char step; // step variable

    // Initialize the stepper motor control port
    MOTOR_PORT = 0x00;
    
    while (1) {         // Input the forward/reverse angle and convert the angle to the number of steps         angle = input_angle();         step = angle_to_step(angle);         // specify the forward rotation Angle         motor_forward(step);         // pause for a while         delay();         // reverse back to the original position         motor_backward(step);         // pause for a while         delay();     }     return 0; }



        









    

// Delay function, adjust according to the speed and rotation angle of the specific stepper motor
void delay()
{     unsigned int i, j;     for (i = 0; i < 50; i++) {         for (j = 0; j < 2000; j++);     } }

// Input angle function
unsigned int input_angle()
{     unsigned int angle;     // Input angle value from outside     // ...     return angle; } ``` 

It should be noted that the input function and delay function in this program need to be modified according to the specific actual situation in order to better adapt to the specific stepping motor and control method. At the same time, the conversion between the rotation angle and the number of steps of the stepping motor also needs to be determined according to the specific motor model.