使用Pretues仿真Arduino驱动步进电机

这几天想做一个给金鱼自动喂食的装置，所以学习了下如何操控步进电机，现在做个记录。

使用Pretues仿真Arduino的话，可以参考：http://www.geek-workshop.com/thread-26325-1-1.html。

步进电机的话，是通过给不同的相通电，形成电磁场，来驱动中间的转子。转子越多，每一步就可以越小，电机就越精确。

ULN2004A是供电模块，通过电平信号的配置来输出电压，通过配置1，2，3，4输入，来使得13，14，15，16输出电压驱动电机。

PS：如果要电机反转的话，就反序配置引脚。参见：http://www.elecfans.com/dianlutu/187/20170116475004.html。

仿真结果：

代码：

/* Main.ino file generated by New Project wizard
 *
 * Created:   Thu Sep 5 2013
 * Processor: ATmega328P
 * Compiler:  Arduino AVR
 */

 #define LED ( 13 )
 #define MOTOR_PIN0 ( 0 )
 #define MOTOR_PIN1 ( 1 )
 #define MOTOR_PIN2 ( 2 )
 #define MOTOR_PIN3 ( 3 )
 
void setup()
 { // put your setup code here, to run once:
   pinMode( LED, OUTPUT );
   pinMode( MOTOR_PIN0, OUTPUT );
   pinMode( MOTOR_PIN1, OUTPUT );
   pinMode( MOTOR_PIN2, OUTPUT );
   pinMode( MOTOR_PIN3, OUTPUT );
 }

void loop()
 { // put your main code here, to run repeatedly:
   /*digitalWrite( LED, HIGH );
   delay( 500 );
   digitalWrite( LED, LOW );
   delay( 500 );*/
   
   static int i = 3;
   
   switch( i-- )
   {
      case 0:
     digitalWrite( MOTOR_PIN0, HIGH );
     digitalWrite( MOTOR_PIN1, LOW );
     digitalWrite( MOTOR_PIN2, LOW );
     digitalWrite( MOTOR_PIN3, LOW );
     digitalWrite( LED, HIGH );
     break;
      case 1:
     digitalWrite( MOTOR_PIN0, LOW );
     digitalWrite( MOTOR_PIN1, HIGH );
     digitalWrite( MOTOR_PIN2, LOW );
     digitalWrite( MOTOR_PIN3, LOW );
     digitalWrite( LED, LOW );
     break;
      case 2:
     digitalWrite( MOTOR_PIN0, LOW );
     digitalWrite( MOTOR_PIN1, LOW );
     digitalWrite( MOTOR_PIN2, HIGH );
     digitalWrite( MOTOR_PIN3, LOW );
     digitalWrite( LED, HIGH );
     break;
      case 3:
     digitalWrite( MOTOR_PIN0, LOW );
     digitalWrite( MOTOR_PIN1, LOW );
     digitalWrite( MOTOR_PIN2, LOW );
     digitalWrite( MOTOR_PIN3, HIGH );
     digitalWrite( LED, LOW );
     break;
      default:
     break;
   }
   
   delay(500);
   
   if( 0 > i )
      i = 3;
 }