标题: spi的程序,用单片机驱动at93c46存储芯片 [打印本页]
作者: dudululu    时间: 2018-11-21 14:24
标题: spi的程序,用单片机驱动at93c46存储芯片
spi的单片机源程序如下:
  1. #include"reg52.h"
  2. #define uchar unsigned char
  3. #define uint unsigned int
  4. uchar code s[9]={0x10,0x20,0x30,0x40,0x50,0x60,0x70,0x80,0x90};
  5. sbit cs=P3^4;
  6. sbit ck=P3^5;
  7. sbit di=P3^6;
  8. sbit d0=P3^7;
  9. #define readcode 0x0c
  10. #define writecode 0x0a
  11. void delay1ms()
  12. {
  13.    unsigned char i,j;
  14.   for(i=0;i<10;i++)
  15.    for(j=0;j<33;j++)
  16.     ;   
  17. }
  18. /*****************************************************
  19. 函数功能：延时若干毫秒
  20. 入口参数：n
  21. ***************************************************/
  22. void delaynms(unsigned char n)
  23. {
  24.    unsigned char i;
  25. for(i=0;i<n;i++)
  26.     delay1ms();
  27. }
  28. void delay(uchar n)
  29. {
  30. int i;
  31. for(i=0;i<n;i++)
  32. ;
  33. }

  35. void clock(void)
  36. {
  37. ck=0;
  38. delay(2);
  39. ck=1;
  40. delay(2);
  41. }

  43. void send(uchar da_ta)
  44. {
  45. int i;
  46. for(i=0;i<8;i++)
  47. {
  48. di=(bit)(da_ta&0x80);
  49. da_ta<<=1;
  50. clock();
  51. }
  52. }

  54. uchar receive(void)
  55. {
  56. uchar data1=0;
  57. int i;
  58. clock();
  59. for(i=0;i<8;i++)
  60. {
  61. data1*=2;
  62. if(d0)
  63. data1++;
  64. clock();
  65. delay(2);
  66. }
  67. return(data1);
  68. }

  70. uchar readdata(uchar add)
  71. {
  72. uchar read_data;
  73. cs=1;
  74. send(readcode);
  75. send(add);
  76. read_data=receive();
  77. cs=0;
  78. return(read_data);
  79. }

  81. void writedata(uchar add,uchar write_data)
  82. {
  83. cs=1;
  84. send(writecode);
  85. send(add);
  86. send(write_data);
  87. cs=0;
  88. delay(4);
  89. cs=1;
  90. delay(4);
  91. while(!d0);
  92. cs=0;
  93. }


  96. void main()
  97. { int i;
  98. P2=0X00;

  100. while(1)
  101. {
  102. for(i=0;i<9;i++)
  103. {
  104. writedata(0x00+i,s[i]);
  105. P2=readdata(0x00+i);
  106. delaynms(1000);

  108. }
  109. }
  110. }
复制代码

所有资料51hei提供下载:
spi.rar (27.01 KB, 下载次数: 30)


作者: tutuwxy2    时间: 2018-11-27 21:48
你不会是duluchun吧?



欢迎光临 (http://www.51hei.com/bbs/) Powered by Discuz! X3.1