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- #include <reg52.h>
- #include <INTRINS.h>
- #define uint unsigned int
- #define uchar unsigned char
- #define ulong unsigned long
- //#define CLOCK P1_0
- //#define D_IN P1_1
- //#define D_OUT P1_2
- //#define _CS P1_3
- sbit CLOCK=P1^0;
- sbit D_IN =P1^1;
- sbit D_OUT=P1^2;
- sbit _CS=P1^3;
- sbit g1=P2^7;
- sbit g2=P2^1;
- sbit g3=P2^3;
- sbit g4=P2^5;
- ulong AD_ad1,AD_ad2;
- float JiZhun_AD=2.5;
- float AD_Data=0.0;
- ulong AD_ad=0;
- char chi;
- unsigned char code table[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
- void delay02s(void)
- {
- unsigned char i,j,k;
- for(i=1;i>0;i--)
- for(j=10;j>0;j--)
- for(k=200;k>0;k--);
- }
- uint read1543(uchar port)
- {
- uint ad;
- uint i;
- uchar al=0,ah=0;
- CLOCK=0;
- _CS=0;
- port<<=4;
- for (i=0;i<4;i++) //將四位通道地址送1543
- {
- D_IN=(bit)(port&0x80);CLOCK=1;CLOCK=0;
- port<<=1;
- }
- for (i=0;i<6;i++) //填6個CLOCK信號
- {
- CLOCK=1;CLOCK=0;
- }
- _CS=1;
- _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();
- _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();
- _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();
- _nop_();_nop_();_nop_();
- _CS=0; //等待AD轉換結束
- _nop_();_nop_();_nop_();
- for (i=0;i<2;i++) //D9,D8
- {
- D_OUT=1;CLOCK=1;ah<<=1;
- if (D_OUT) ah +=0x01;
- CLOCK=0;
- }
- for (i=0;i<8;i++) //取出D7--D0
- {
- D_OUT=1;CLOCK=1;al <<= 1;
- if (D_OUT)
- al +=0x01;
- CLOCK=0;
- }
- _CS=1;
- ad = (uint)ah;
- ad <<= 8;
- ad +=(uint)al; //
- return(ad);
- }
- void main()
- {
- TMOD=0x01;
- TH0=(65535-20000)/255;
- TL0=(65535-20000)%255;
- EA=1;ET0=1;TR0=1;
- while(1)
- {
- P0=table[(AD_ad%10)];
- g1=1;
- delay02s();
- g1=0;
- P0=table[(AD_ad/10)%10];
- g2=1;
- delay02s();
- g2=0;
- P0=table[(AD_ad/100)%10];
- g3=1;
- delay02s();
- g3=0;
- P0=table[(AD_ad/1000)]|0X80;
- g4=1;
- delay02s();
- g4=0;
- }
- }
- zhongduan()interrupt 1
- {
- TH0=(65535-20000)/255;
- TL0=(65535-20000)%255;
- chi++;
- if(chi==50)
- {
- chi=0;
- AD_ad1 = read1543(0); // (通道0電壓正端)
- AD_Data = ((float)AD_ad1)*JiZhun_AD*2/1024+0.15005;//0.15經過實測需要加0.15減少誤差
- AD_ad =((AD_Data-2.68)/0.185)*1000;
-
- }
-
- }
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