51单片机模拟spi串行接口程序

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1、51单片机模拟spi串行接口程序51单片机模拟spi串行接口程序，在keilc51下编写sbitCS=P3^5;sbitCLK=P1^5;sbitDataI=P1^7;sbitDataO=P1^6;#defineSD_Disable()CS=1//片选关#defineSD_Enable()CS=0//片选开unsignedcharSPI_TransferByte(unsignedcharval){unsignedcharBitCounter;for(BitCounter=8;BiCounter!=0;BitCounter--){CLK=

2、0;DataI=0;//writeif(val&0x80)DataI=1;val<<=1;CLK=1;if(DataO)val

3、=1;//read}CLK=0;returnval;}sbitCLK=P1^5;sbitDataI=P1^7;sbitDataO=P1^6;#defineSD_Disable()CS=1//片选关#defineSD_Enable()CS=0//片选开unsignedcharSPI_TransferByte(unsignedcharval){unsignedcharBitCounter;for(BitCounte

4、r=8;BiCounter!=0;BitCounter--){CLK=0;DataI=0;//writeif(val&0x80)DataI=1;val<<=1;CLK=1;if(DataO)val

5、=1;//read}CLK=0;returnval;}sbitCLK=P1^5;sbitDataI=P1^7;sbitDataO=P1^6;#defineSD_Disable()CS=1//片选关#defineSD_Enable()CS=0//片选开unsignedcharSPI_TransferByte(unsignedcharval){u

6、nsignedcharBitCounter;for(BitCounter=8;BiCounter!=0;BitCounter--){CLK=0;DataI=0;//writeif(val&0x80)DataI=1;val<<=1;CLK=1;if(DataO)val

7、=1;//read}CLK=0;returnval;}sbitCLK=P1^5;sbitDataI=P1^7;sbitDataO=P1^6;#defineSD_Disable()CS=1//片选关#defineSD_Enable()CS=0//片选开unsignedchar

8、SPI_TransferByte(unsignedcharval){unsignedcharBitCounter;for(BitCounter=8;BiCounter!=0;BitCounter--){CLK=0;DataI=0;//writeif(val&0x80)DataI=1;val<<=1;CLK=1;if(DataO)val

9、=1;//read}CLK=0;returnval;}sbitCLK=P1^5;sbitDataI=P1^7;sbitDataO=P1^6;#defineSD_Disable()CS=1//片选关#def

10、ineSD_Enable()CS=0//片选开unsignedcharSPI_TransferByte(unsignedcharval){unsignedcharBitCounter;for(BitCounter=8;BiCounter!=0;BitCounter--){CLK=0;DataI=0;//writeif(val&0x80)DataI=1;val<<=1;CLK=1;if(DataO)val

11、=1;//read}CLK=0;returnval;}sbitCLK=P1^5;sbitDataI=P1^7;sbitDataO=P1

12、^6;#defineSD_Disable()CS=1//片选关#defineSD_Enable()CS=0//片选开unsignedcharSPI_TransferByte(unsignedcharval){unsignedcharBitCounter;for(BitCounter=8;BiCounter!=0;BitCounter--){CLK=0;DataI=0;//writeif(val&0x80)DataI=1;val<<=1;CLK=1;if(DataO)val

13、=1;//read}CLK=0;returnval;}sbitC

14、LK=P1^5;sbitDataI=P1^7;sbitDataO=P1^6;#defineSD_Disable()CS=1//片选关#defineSD_Enable()CS=0//片选开unsignedch