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标题: AT89C2051驱动步进电机的电路和源码 [打印本页]
作者: fghser    时间: 2010-10-13 10:11     标题: AT89C2051驱动步进电机的电路和源码

电路如图所示：



程序
  1. stepper.c
  2. stepper.hex

  4. /*
  5. * STEPPER.C
  6. * sweeping stepper's rotor cw and cww 400 steps
  7. * Copyright (c) 1999 by W.Sirichote
  8. */

  10. #include c:\mc51\8051io.h /* include i/o header file */
  11. #include c:\mc51\8051reg.h

  13. register unsigned char j,flag1,temp;
  14. register unsigned int cw_n,ccw_n;

  16. unsigned char step[8]={0x80,0xc0,0x40,0x60,0x20,0x30,0x10,0x90}
  17. #define n 400

  19. /* flag1 mask byte
  20. 0x01 run cw()
  21. 0x02 run ccw()
  22. */

  24. main()

  26. {
  27. flag1=0;
  28. serinit(9600);
  29. disable(); /* no need timer interrupt */
  30. cw_n = n; /* initial step number for cw */
  31. flag1 |=0x01; /* initial enable cw() */

  33. while(1){
  34. {
  35. tick_wait(); /* wait for 10ms elapsed */

  37. energize(); /* round-robin execution the following tasks every 10ms */
  38. cw();
  39. ccw();
  40. }
  41. }

  43. }

  45. cw(){
  46. if((flag1&0x01)!=0)
  47. {
  48. cw_n--; /* decrement cw step number */
  49. if (cw_n !=0)
  50. j++; /* if not zero increment index j */
  51. else
  52. {flag1&=~0x01; /* disable cw() execution */
  53. ccw_n = n; /* reload step number to ccw counter */
  54. flag1 |=0x02; /* enable cww() execution */
  55. }
  56. }

  58. }

  60. ccw(){
  61. if((flag1&0x02)!=0)
  62. {
  63. ccw_n--; /* decremnent ccw step number */
  64. if (ccw_n !=0)
  65. j--; /* if not zero decrement index j */
  66. else
  67. {flag1&=~0x02; /* disable ccw() execution */
  68. cw_n = n; /* reload step number to cw counter */
  69. flag1 |=0x01; /* enable cw() execution */
  70. }
  71. }

  73. }

  75. tick_wait(){ /* cputick was replaced by simpler ASM code 10ms wait */

  77. asm" JNB TCON.5,*"; /* wait for TF0 set */
  78. asm" CLR TCON.5"; /* clear TF0 for further set */
  79. asm" ORL TH0,#$DC"; /* reload TH0 with $DC, TL0 = 0 */
  80. }

  82. energize(){

  84. P1 = step[(j&0x07)]; /* only step 0-7 needed */

  86. }
复制代码


图片附件: a2006011221593217.gif (2010-10-13 10:10, 9.04 KB) / 下载次数 238
http://bbs.hymcu.com/attachment.php?aid=67&k=191e67a6af4879e7c2446d8161687881&t=1732451022&sid=R39W3N

作者: 稻草人    时间: 2010-10-13 10:18

不错不错，顶一个！！



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