adc0832八位AD转换，1602液晶显示
单片机源程序如下:
- #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) //最小延时1ms
- { unsigned char j;
- while(i--)
- for(j=0;j<125; j++);
- }
- void delay_10ns(unsigned char i) //最小延时10ns
- { unsigned char j;
- while(i--)
- for(j=0;j<10; j++);
- }
- void write_com(unsigned char com,bit p) //写指令
- {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) //写数据
- {
- 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) //写坐标，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)
- //在指定位置显示一个字符。
- { 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) //显示一个数字
- {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++); //延时，脉冲一位持续的时间
- }
- unsigned char ADC0832(void) //把模拟电压值转换成8位二进制数并返回
- {
- unsigned char i,data_c;
- data_c=0;
- ADC_CS=0;
- ADC_DO=0;//片选，DO为高阻态
- for(i=0;i<10;i++)
- {;}
- ADC_CLK=0;
- Delay(2);
- ADC_DI=1;
- ADC_CLK=1;
- Delay(2); //第一个脉冲，起始位
- ADC_CLK=0;
- Delay(2);
- ADC_DI=1;
- ADC_CLK=1;
- Delay(2); //第二个脉冲，DI=1表示双通道单极性输入
- ADC_CLK=0;
- Delay(2);
- ADC_DI=1;
- ADC_CLK=1;
- Delay(2); //第三个脉冲，DI=1表示选择通道1（CH2）
- ADC_DI=0;
- ADC_DO=1;//DI转为高阻态，DO脱离高阻态为输出数据作准备
- ADC_CLK=1;
- Delay(2);
- ADC_CLK=0;
- Delay(2);//经实验，这里加一个脉冲AD便能正确读出数据，
- //不加的话读出的数据少一位（最低位d0读不出）
- for (i=0; i<8; i++)
- {
- ADC_CLK=1;
- Delay(2);
- ADC_CLK=0;
- Delay(2);
- data_c=(data_c<<1)|ADC_DO;//在每个脉冲的下降沿DO输出一位数据，最终ch为8位二进制数
- }
- ADC_CS=1;//取消片选，一个转换周期结束
- return(data_c);//把转换结果返回
- }
- void main(void)
- {
- unsigned int data_temp=0;
- while(1)
- { data_temp=ADC0832();
- init();
- xs_int(196*data_temp,1);
- }
- }
所有资料51hei提供下载:
ADC0832 1602.rar
(272.72 KB, 下载次数: 105)
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