51单片机模拟spi串行接口程序，在keilc51下编写

51单片机模拟spi串行接口程序，在keilC51下编写

1. 
   
2. sbit CS=P3^5;
   
3. sbit CLK= P1^5;
   
4. sbit DataI=P1^7;
   
5. sbit DataO=P1^6;
   
6. #define SD_Disable() CS=1 //片选关
   
7. #define SD_Enable() CS=0 //片选开
   
8. unsigned char SPI_TransferByte(unsigned char val)
   
9. {
   
10. unsigned char BitCounter;
    
11. for(BitCounter=8; BiCounter!=0; BitCounter--)
    
12. { CLK=0;
    
13. DataI=0; // write
    
14. if(val&0x80) DataI=1;
    
15. val<<=1;
    
16. CLK=1;
    
17. if(DataO)val|=1; // read
    
18. }
    
19. CLK=0;
    
20. return val;
    
21. }sbit CLK= P1^5;
    
22. sbit DataI=P1^7;
    
23. sbit DataO=P1^6;
    
24. #define SD_Disable() CS=1 //片选关
    
25. #define SD_Enable() CS=0 //片选开
    
26. unsigned char SPI_TransferByte(unsigned char val)
    
27. {
    
28. unsigned char BitCounter;
    
29. for(BitCounter=8; BiCounter!=0; BitCounter--)
    
30. { CLK=0;
    
31. DataI=0; // write
    
32. if(val&0x80) DataI=1;
    
33. val<<=1;
    
34. CLK=1;
    
35. if(DataO)val|=1; // read
    
36. }
    
37. CLK=0;
    
38. return val;
    
39. }
    
40. sbit CLK= P1^5;
    
41. sbit DataI=P1^7;
    
42. sbit DataO=P1^6;
    
43. #define SD_Disable() CS=1 //片选关
    
44. #define SD_Enable() CS=0 //片选开
    
45. unsigned char SPI_TransferByte(unsigned char val)
    
46. {
    
47. unsigned char BitCounter;
    
48. for(BitCounter=8; BiCounter!=0; BitCounter--)
    
49. { CLK=0;
    
50. DataI=0; // write
    
51. if(val&0x80) DataI=1;
    
52. val<<=1;
    
53. CLK=1;
    
54. if(DataO)val|=1; // read
    
55. }
    
56. CLK=0;
    
57. return val;
    
58. }
    
59. sbit CLK= P1^5;
    
60. sbit DataI=P1^7;
    
61. sbit DataO=P1^6;
    
62. #define SD_Disable() CS=1 //片选关
    
63. #define SD_Enable() CS=0 //片选开
    
64. unsigned char SPI_TransferByte(unsigned char val)
    
65. {
    
66. unsigned char BitCounter;
    
67. for(BitCounter=8; BiCounter!=0; BitCounter--)
    
68. { CLK=0;
    
69. DataI=0; // write
    
70. if(val&0x80) DataI=1;
    
71. val<<=1;
    
72. CLK=1;
    
73. if(DataO)val|=1; // read
    
74. }
    
75. CLK=0;
    
76. return val;
    
77. }
    
78. sbit CLK= P1^5;
    
79. sbit DataI=P1^7;
    
80. sbit DataO=P1^6;
    
81. #define SD_Disable() CS=1 //片选关
    
82. #define SD_Enable() CS=0 //片选开
    
83. unsigned char SPI_TransferByte(unsigned char val)
    
84. {
    
85. unsigned char BitCounter;
    
86. for(BitCounter=8; BiCounter!=0; BitCounter--)
    
87. { CLK=0;
    
88. DataI=0; // write
    
89. if(val&0x80) DataI=1;
    
90. val<<=1;
    
91. CLK=1;
    
92. if(DataO)val|=1; // read
    
93. }
    
94. CLK=0;
    
95. return val;
    
96. }
    
97. sbit CLK= P1^5;
    
98. sbit DataI=P1^7;
    
99. sbit DataO=P1^6;
    
100. #define SD_Disable() CS=1 //片选关
     
101. #define SD_Enable() CS=0 //片选开
     
102. unsigned char SPI_TransferByte(unsigned char val)
     
103. {
     
104. unsigned char BitCounter;
     
105. for(BitCounter=8; BiCounter!=0; BitCounter--)
     
106. { CLK=0;
     
107. DataI=0; // write
     
108. if(val&0x80) DataI=1;
     
109. val<<=1;
     
110. CLK=1;
     
111. if(DataO)val|=1; // read
     
112. }
     
113. CLK=0;
     
114. return val;
     
115. }
     
116. sbit CLK= P1^5;
     
117. sbit DataI=P1^7;
     
118. sbit DataO=P1^6;
     
119. #define SD_Disable() CS=1 //片选关
     
120. #define SD_Enable() CS=0 //片选开
     
121. unsigned char SPI_TransferByte(unsigned char val)
     
122. {
     
123. unsigned char BitCounter;
     
124. for(BitCounter=8; BiCounter!=0; BitCounter--)
     
125. { CLK=0;
     
126. DataI=0; // write
     
127. if(val&0x80) DataI=1;
     
128. val<<=1;
     
129. CLK=1;
     
130. if(DataO)val|=1; // read
     
131. }
     
132. CLK=0;
     
133. return val;
     
134. }
     
135. sbit CLK= P1^5;
     
136. sbit DataI=P1^7;
     
137. sbit DataO=P1^6;
     
138. #define SD_Disable() CS=1 //片选关
     
139. #define SD_Enable() CS=0 //片选开
     
140. unsigned char SPI_TransferByte(unsigned char val)
     
141. {
     
142. unsigned char BitCounter;
     
143. for(BitCounter=8; BiCounter!=0; BitCounter--)
     
144. { CLK=0;
     
145. DataI=0; // write
     
146. if(val&0x80) DataI=1;
     
147. val<<=1;
     
148. CLK=1;
     
149. if(DataO)val|=1; // read
     
150. }
     
151. CLK=0;
     
152. return val;
     
153. }
     
154. sbit CLK= P1^5;
     
155. sbit DataI=P1^7;
     
156. sbit DataO=P1^6;
     
157. #define SD_Disable() CS=1 //片选关
     
158. #define SD_Enable() CS=0 //片选开
     
159. unsigned char SPI_TransferByte(unsigned char val)
     
160. {
     
161. unsigned char BitCounter;
     
162. for(BitCounter=8; BiCounter!=0; BitCounter--)
     
163. { CLK=0;
     
164. DataI=0; // write
     
165. if(val&0x80) DataI=1;
     
166. val<<=1;
     
167. CLK=1;
     
168. if(DataO)val|=1; // read
     
169. }
     
170. CLK=0;
     
171. return val;
     
172. }
     

复制代码

谢谢！！！！！！！！！！！！！

搞笑吧，只有数据传送子函数？楼主肯定在开我们玩笑！