AT89C2051驱动步进电机的电路和源码 步进电机, 源码, 电路, 驱动

fghser

电路如图所示：

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2010-10-13 10:10

程序

1. stepper.c
   
2. stepper.hex
   
3. 
   
4. /*
   
5. * STEPPER.C
   
6. * sweeping stepper's rotor cw and cww 400 steps
   
7. * Copyright (c) 1999 by W.Sirichote
   
8. */
   
9. 
   
10. #include c:\mc51\8051io.h /* include i/o header file */
    
11. #include c:\mc51\8051reg.h
    
12. 
    
13. register unsigned char j,flag1,temp;
    
14. register unsigned int cw_n,ccw_n;
    
15. 
    
16. unsigned char step[8]={0x80,0xc0,0x40,0x60,0x20,0x30,0x10,0x90}
    
17. #define n 400
    
18. 
    
19. /* flag1 mask byte
    
20. 0x01 run cw()
    
21. 0x02 run ccw()
    
22. */
    
23. 
    
24. main()
    
25. 
    
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() */
    
32. 
    
33. while(1){
    
34. {
    
35. tick_wait(); /* wait for 10ms elapsed */
    
36. 
    
37. energize(); /* round-robin execution the following tasks every 10ms */
    
38. cw();
    
39. ccw();
    
40. }
    
41. }
    
42. 
    
43. }
    
44. 
    
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. }
    
57. 
    
58. }
    
59. 
    
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. }
    
72. 
    
73. }
    
74. 
    
75. tick_wait(){ /* cputick was replaced by simpler ASM code 10ms wait */
    
76. 
    
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. }
    
81. 
    
82. energize(){
    
83. 
    
84. P1 = step[(j&0x07)]; /* only step 0-7 needed */
    
85. 
    
86. }

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