#include<reg52.h> sfr ADC_CONTR = 0xBC; //ADC control register
sfr ADC_RES = 0xBD; //ADC 8-bit result register
sfr P1ASF = 0x9D; //P1 secondary function control register /* Define ADC operation const for ADC_CONTER */
#define ADC_POWER 0x80
#define ADC_FLAG 0x10
#define ADC_START 0x08
#define ADC_SPEEDLL 0x00
#define ADC_SPEEDL 0x20
#define ADC_SPEEDH 0x40
#define ADC_SPEEDHH 0x60 unsigned char ADC_ch = 0;
void Delay(unsigned int n); /*Initial ADC sfr*/
void initADC()
{
P1ASF = 0xff; //Set All P1 as analog input port
ADC_RES = 0; //Clear previous result
ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ADC_START | ADC_ch;
Delay(2); //ADC power-on delay and Start A/D conversion //IE = 0xa0; //Enable ADC interrupt and Open master interrupt switch
} void initSCI(void)
{
SM0 = 0; /*Step 1 : 确定串口通信方式*/
SM1 = 1; TMOD = 0x20; /*step 2: 根据串口通信方式 确定是否设置波特率*/
TH1 = 0xfd;
TL1 = 0xfd; TR1 = 1; /*step 3 :启动*/
REN = 1; EA = 1; /*step 4: 是否启用中断函数*/
ES = 1;
} void putChar (unsigned char chr)//发送一个字符
{
SBUF = chr;
while(!TI); TI=0;
} void putStr(unsigned char str[], unsigned char n)
{
while( n-- )
{
SBUF = str[n];
while(!TI); TI=0;
}
} void Delay(unsigned int n)
{
unsigned int x;
while( n-- ){
x = 5000;
while(x--);
}
} int main()
{
initSCI();
initADC(); while(1)
{
//operation;
}
return 0;
} /* ADC interrupt service routine */
void adc_isr() interrupt 5 using 1
{
ADC_CONTR &= !ADC_FLAG; // Clear ADC interrupt flag //SendData(ADC_ch); //Show Channel NO.
//SendData(ADC_RES); //Get ADC 8-bit result and Send to UART if(++ADC_ch > 7) ADC_ch = 0; //switch to next channel
ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ADC_START | ADC_ch;
} void ser() interrupt 4
{
if( RI )
{
RI = 0;
/*Operation SBUF*/
}
else if( TI )
{
TI = 0;
}
return ;
}