shumozhuanhuan.rar_IO口通信_数模转换

#include<reg51.h> #define uchar unsigned char #define uint unsigned int sbit SPI_CLK = P1^1; sbit SPI_DATA = P1^0; sbit CS_DA = P1^2; void da5615(uint da) { uchar i; da<<=6; CS_DA=0; SPI_CLK=0; for (i=0;i<12;i++) { SPI_DATA=(bit)(da&0x8000); SPI_CLK=1; da<<=1; SPI_CLK=0; } CS_DA=1; SPI_CLK=0; for (i=0;i<12;i++); } void main() { da5615(512); while(1); }