用DAC0808实现数字调压

/*************** writer:shopping.w ******************/ #include <reg52.h> #define uint unsigned int #define uchar unsigned char sbit K1 = P3^0; sbit K2 = P3^1; sbit K3 = P3^2; sbit K4 = P3^3; sbit K5 = P3^4; sbit K6 = P3^5; sbit K7 = P3^6; sbit K8 = P3^7; void DelayMS(uint ms) { uchar i; while(ms--) { for(i=0;i<120;i++); } } void main() { P2 = 0x00; while(1) { if(K1 == 0) P2 = 0; if(K2 == 0) P2 = 35; if(K3 == 0) P2 = 70; if(K4 == 0) P2 = 105; if(K5 == 0) P2 = 140; if(K6 == 0) P2 = 175; if(K7 == 0) P2 = 210; if(K8 == 0) P2 = 255; DelayMS(2); } }