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#include<lpc21xx.h> void cmdwrt(unsigned int); void datawrt(unsigned int); void delay(unsigned int); void hextobcd(unsigned int); int adc(); void main() { unsigned int c[6]={0x20,0x28,0x0e,0x01,0x06,0x80}; unsigned int x,y=0,z=1; unsigned int data; unsigned char i; PINSEL0=0x00000000; PINSEL1=0x00000000; IODIR0=0x00003c00; IODIR1=0x03000000; for(i=0;i<6;i++) { cmdwrt(c[i]); } while(1) { data=adc(); x=data; data=data&0x0000ff00; y=data>>8; while(y!=z) { data=adc(); x=data; data=data&0x0000ff00; y=data>>8; while(y!=z) { // for(i=0;i<6;i++) // { cmdwrt(0x01); // } hextobcd(y); z=y; } } } } int adc() { unsigned int a; PINSEL1=0x15400000; ADCR=0x01200001; a=ADDR; while(!(ADDR&0x80000000)); return(a); } void cmdwrt(unsigned int command) { unsigned int x; x=command; x=x & 0xf0; x=x<<6; IOCLR0 = 0x00003c00; IOSET0=x; IOCLR1=0x03000000; //register select and enable IOSET1=0x02000000; delay(50000); IOCLR1=0x02000000; delay(50000); x=command; x=x & 0x0f; IOCLR0 = 0x00003c00; x=x<<10; IOSET0=x; IOCLR1=0x03000000; //register select and enable IOSET1=0x02000000; delay(50000); IOCLR1=0x02000000; delay(50000); } void datawrt(unsigned int data) { unsigned int value; value=data; value=value & 0xf0; value=value<<6; IOCLR0 = 0x00003c00; IOSET0=value; IOCLR1=0x03000000; IOSET1=0x03000000; delay(50000); IOCLR1=0x02000000; delay(50000); value=data; value=value & 0x0f; IOCLR0 = 0x00003c00; value=value<<10; IOSET0=value; IOCLR1=0x03000000; IOSET1=0x03000000; delay(50000); IOCLR1=0x02000000; delay(50000); } void delay(unsigned int it) { unsigned int i; for(i=0;i<=it;i++); } void hextobcd(unsigned int hex) { unsigned int msb1=0,msb0=0,lsb1=0,lsb0=0; while(hex>=100) { hex=hex-100; msb0++; } while(hex>=10) { hex=hex-10; lsb1++; } lsb0=hex; msb0=msb0+0x30; msb1=msb1+0x30; lsb0=lsb0+0x30; lsb1=lsb1+0x30; datawrt(msb1); datawrt(msb0); datawrt(lsb1); datawrt(lsb0); }