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單片機源程序如下:
- #include <reg52.h>
- #include<intrins.h>
- #include<math.h>
- /**********************************8/
- /**********LCD1602接口程序**********/
- #define DD P2
- sbit Rs=P3^0;
- sbit Rw=P3^1;
- sbit E=P3^2;
- sbit busy_p=ACC^7;
- /********************************/
- void delay_1ms(unsigned char i) //最小延時1ms
- { unsigned char j;
- while(i--)
- for(j=0;j<125; j++);
- }
- void delay_10ns(unsigned char i) //最小延時10ns
- { unsigned char j;
- while(i--)
- for(j=0;j<10; j++);
- }
- void write_com(unsigned char com,bit p) //寫指令
- {if(p)
- delay_10ns(5);
- E=0;
- Rs=0;
- Rw=0;
- DD=com;
- delay_10ns(50); //>40ns
- E=1;
- delay_1ms(2); //>150ns
- E=0;
- delay_10ns(4); //>25+10ns
- }
- void write_date(unsigned char DATA) //寫數據
- {
- delay_10ns(50);
- E=0;
- Rs=1;
- Rw=0;
- DD=DATA;
- delay_10ns(50);
- E=1;
- delay_10ns(50);
- E=0;
- delay_10ns(4);
- }
- void addr_x_y(unsigned char x,bit y) //寫坐標,定位置
- { unsigned char temp=0x80;
- if(y)
- {temp|=0x40;}
- temp|=x;
- write_com(temp,0);
- }
- void desplay_char(unsigned char x,bit y,unsigned char p)
- //在指定位置顯示一個字符。
- { addr_x_y(x,y);
- write_date(p);
- }
- void init(void)
- {delay_1ms(15);
- write_com(0x38,0);
- delay_1ms(5);
- write_com(0x38,0);
- delay_1ms(5);
- write_com(0x38,0);
- delay_1ms(5);
- write_com(0x38,1);
- write_com(0x08,1);
- write_com(0x01,1);
- write_com(0x06,1);
- write_com(0x0c,1);
- }
- void xs_int(unsigned int shuju,bit t) //顯示一個數字
- {unsigned char huancun[6]={0};
- unsigned char biaozhi=0,i;
- if (shuju < 10) biaozhi = 1;
- else if(shuju < 100) biaozhi = 2;
- else if(shuju < 1000) biaozhi = 3;
- else if(shuju < 10000) biaozhi = 4;
- else if(shuju < 65535) biaozhi = 5;
- switch(biaozhi)
- {case 5:huancun[5] = shuju/10000;
- case 4:huancun[3] = shuju%10000/1000;
- case 3:huancun[2] = shuju%1000/100;
- case 2:huancun[1] = shuju%100/10;
- case 1:huancun[0] = shuju%10;
- break;
- default:break;
- }
- for(i=6;i>1;i--)
- {if(i==5)desplay_char(10,1,'.');
- else desplay_char(15-i,t,0x30+huancun[i-1]); }
- desplay_char(15,t,'V');
- }
- /************************************************************/
- /**********ADC0832接口程序************************************/
- sbit ADC_CS =P3^4;
- sbit ADC_CLK=P3^5;
- sbit ADC_DO =P3^6;
- sbit ADC_DI =P3^7;
- /*******************************************************************/
-
- void Delay(unsigned char j)
- {
- unsigned char i;
- for(i=0;i<j;i++); //延時,脈沖一位持續的時間
- }
- unsigned char ADC0832(void) //把模擬電壓值轉換成8位二進制數并返回
- {
- unsigned char i,data_c;
- data_c=0;
- ADC_CS=0;
- ADC_DO=0;//片選,DO為高阻態
- for(i=0;i<10;i++)
- {;}
- ADC_CLK=0;
- Delay(2);
- ADC_DI=1;
- ADC_CLK=1;
- Delay(2); //第一個脈沖,起始位
- ADC_CLK=0;
- Delay(2);
- ADC_DI=1;
- ADC_CLK=1;
- Delay(2); //第二個脈沖,DI=1表示雙通道單極性輸入
- ADC_CLK=0;
- Delay(2);
- ADC_DI=1;
- ADC_CLK=1;
- Delay(2); //第三個脈沖,DI=1表示選擇通道1(CH2)
- ADC_DI=0;
- ADC_DO=1;//DI轉為高阻態,DO脫離高阻態為輸出數據作準備
- ADC_CLK=1;
- Delay(2);
- ADC_CLK=0;
- Delay(2);//經實驗,這里加一個脈沖AD便能正確讀出數據,
- //不加的話讀出的數據少一位(最低位d0讀不出)
- for (i=0; i<8; i++)
- {
- ADC_CLK=1;
- Delay(2);
- ……………………
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