标题: 51单片机驱动74hc959芯片显示程序 [打印本页]
作者: liuqq    时间: 2015-5-20 18:07
标题: 51单片机驱动74hc959芯片显示程序
  1. #include <reg51.h>
  2. #include <intrins.h>
  3. #define nop   _nop_()
  4. #define uchar unsigned char
  5. #define uint unsigned int
  6. uchar seg_code[12] ={0xc0,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0xaa,0x00};
  7. sbit STCP = P3^5;
  8. sbit DS = P3^4;
  9. sbit SHCP = P3^6;
  10. void delay(uchar t)
  11. {
  12. uchar i;
  13. while(t--)
  14. {
  15. for(i=0;i<120;i++);
  16. }
  17. }
  18. void input_595(uchar dat)        //将数据放到移位寄存器中
  19. {
  20. uchar i;
  21. for(i=0;i<8;i++)
  22. {
  23. dat<<=1;
  24. DS = CY;
  25. SHCP = 0;
  26. nop;
  27. nop;
  28. SHCP = 1;
  29. nop;
  30. nop;
  31. }
  32. SHCP = 0;       
  33. }
  34. void input_cuncu()          //将数据放入存储寄存器中
  35. {
  36. STCP = 0;
  37. nop;
  38. nop;
  39. STCP = 1;
  40. nop;
  41. nop;
  42. SHCP = 0;
  43. nop;
  44. nop;
  45. }
  46. void main()
  47. {
  48. while(1)
  49. {
  50. input_595(seg_code[0]);
  51. input_595(seg_code[10]);
  52. input_cuncu();       
  53. }
  54. }
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