CT107D_pcf8591_光敏电阻.doc

/*光敏电阻：根据光的强度，改变电阻，从而输出模拟电压，此为ADpcf8591的AIN1输入端，接下来怎么做，你懂的*/#include#define rst573 P2&=0x1f#define ledY4C P2|=0x80#define beeY5C P2|=0xa0#define smgY6C P2|=0xc0#define smgY7C P2|=0xe0sbit sclIIC=P20;sbit sdaIIC=P21;sbit P04=P04;sbit P06=P06;sbit P36=P36;sbit rs1602=P20;sbit wr1602=P21;sbit en1602=P12;void delay4us();void delay6us(unsigned char us)while(us-);void init107()P36=0;rst573;/close ledP0=0xff;ledY4C;rst573;/close beeP06=0;P04=0;beeY5C;rst573;/close smgP0=0x00;smgY6C;rst573;void startIIC()sdaIIC=1;delay4us();sclIIC=1;delay4us();sdaIIC=0;delay4us();sclIIC=0;delay4us();void stopIIC()sdaIIC=0;delay4us();sclIIC=1;delay4us();sdaIIC=1;delay4us();sclIIC=0;delay4us();void response()unsigned char i;sdaIIC=1;i=200;sclIIC=1;delay4us();while(sdaIIC=1&i-);sclIIC=0;void writeIIC(unsigned char temp)unsigned char i;for(i=8;i;i-)temp=1;sdaIIC=CY;delay4us();sclIIC=1;delay4us();sclIIC=0;delay4us();unsigned char readIIC()unsigned char temp,i;for(i=8;i;i-)temp=1;sclIIC=1;delay4us();temp|=sdaIIC;delay4us();sclIIC=0;delay4us();return temp;void ADpcf8591()startIIC();writeIIC(0x90);response();writeIIC(0x01);/对准AIN1response();stopIIC();unsigned char readAD()unsigned char temp;startIIC();writeIIC(0x91);response();temp=readIIC();response();stopIIC();return temp;void dat1602(unsigned char dat)unsigned char temp;dors1602=0;wr1602=1;en1602=1;temp=P0;while(temp&0x80);rs1602=1;wr1602=0;P0=dat;en1602=1;en1602=0;void com1602(unsigned char com)unsigned char temp;dors1602=0;wr1602=1;en1602=1;temp=P0;while(temp&0x80);rs1602=0;wr1602=0;P0=com;en1602=1;en1602=0;void init1602()com1602(0x38);/显示模式设置指令 1602固定的第一句指令com1602(0x0e);/光标打开，不闪烁com1602(0x06);/写入一个字符后指针地址加1，写一个字符时整屏不移动/com1602(0x07);/写入一个字符后指针地址加1，写一个字符时整屏移动com1602(0x01);/清屏显示，数据指针清0void main()unsigned char vol,vol1;init107();ADpcf8591();init1602();while(1)vol=readAD();if(vol!=vol1)com1602(0x80);vol1=vol;dat