display.c

手机充电器的电路板的测试机架的测试程序,利用AVR的AD转换器测试各点的电压.

#include "extern.h"
#define	DISPPORT	PORTB
#define SCLK		PB1
#define SER			PB3
#define RCLK		PB2
#define DISPWEI		4
#define SegA		0x40
#define SegB		0x80
#define SegC		0x10
#define SegD		0x04
#define SegE		0x02
#define SegF		0x01
#define SegG		0x20
#define SegH		0x08
const U8 LEDWEI[]={0x08,0x04,0x80,0x40,0x02,0x10,0};
const U8 LEDZM[]=" 0123456789ABCDEFPSIL-.";
const U8   LEDTable[]={			0,
								SegA+SegB+SegC+SegD+SegE+SegF,			//0
								SegB+SegC,
								SegA+SegB+SegG+SegE+SegD,
								SegA+SegB+SegC+SegD+SegG,
								SegF+SegG+SegB+SegC,
								SegF+SegG+SegC+SegD+SegA,
								SegA+SegF+SegE+SegD+SegC+SegG,
								SegA+SegB+SegC,
								SegA+SegB+SegC+SegD+SegE+SegF+SegG,
								SegA+SegB+SegC+SegD+SegF+SegG,			//9
								SegA+SegB+SegC+SegE+SegF+SegG,			//A
								SegC+SegD+SegE+SegF+SegG,				//b
								SegD+SegE+SegG,							//c
								SegB+SegC+SegD+SegE+SegG,				//d
								SegA+SegD+SegE+SegF+SegG,				//E
								SegA+SegE+SegF+SegG,					//F
								SegA+SegB+SegE+SegF+SegG,				//P
								SegA+SegC+SegD+SegF+SegG,				//S
								SegB+SegC,								//i
								SegF+SegE+SegD,							//L
								SegG,									//-		
								0x60};		
U8 DispBuf[6];
U8 *string;
void Disp0(U8 ch);
void DispChange(void)
{
	U8 uc0;
	for(uc0=0;uc0<DISPWEI+1;uc0++) Disp0(uc0);
}

void Disp0(U8 ch)
{
	union{
		U16 uint;
		U8 uchar[2];
	}un;
	U8 uc0;
	un.uchar[1]=LEDWEI[ch+6-DISPWEI];
	un.uchar[0]=DispBuf[ch];
	ClrBit(DISPPORT,SCLK);
	for(uc0=0;uc0<16;uc0++){
		wdt_reset();
		ClrBit(DISPPORT,SER);
		if(ChkBit(un.uint,15)) SetBit(DISPPORT,SER);
		SetBit(DISPPORT,SCLK);
		ClrBit(DISPPORT,SCLK);
		un.uint<<=1;
	}
	SetBit(PORTB,RCLK);
	ClrBit(PORTB,RCLK);
	for(un.uint=0;un.uint<50;un.uint++);
}
void DispVal(U8 ch)
{
	U8 uc0;
	if(ch<10) 	Buf[0]=ch+'0';
	else		Buf[0]=ch-10+'A';
	Buf[1]=0;
	Div(Voltage.Cur,VOLTAGEREF,4,&Buf[1]);
	uc0=0;
	while(Buf[uc0])uc0++;
	for(;uc0<DISPWEI+1;uc0++){
		Buf[uc0]='0';
	}
	DispStr(Buf);
}
void DispStr(U8 *ptr)
{
	U8 uc1,uc2;
	uc2=0;
	while(*ptr){
		for(uc1=0;uc1<24;uc1++){
			if(*ptr==LEDZM[uc1]){
				if(uc1==22){
					uc2--;
					DispBuf[uc2] |=SegH;
				}else{
					DispBuf[uc2]=LEDTable[uc1];
				}
				break;				
			}
		}
		uc2++;
		if(uc2>DISPWEI) break;
		ptr++;
	}
	for(;uc2<DISPWEI;uc2++) DispBuf[uc2]=0;
}