adc.c

来自「44B0+8019系统」· C语言 代码 · 共 62 行

#include "..\inc\44b.h"
#include "intserve.h"
#include "int_onoff.h"
#include "adc.h"

unsigned int  ADC_DATA[8];
unsigned char ADC_ONOFF = ADCOFF;

void __irq Adc_Int();
//#define rADCCON		(*(volatile unsigned *)0x1d40000)
//#define rADCPSR		(*(volatile unsigned *)0x1d40004)
//#define rADCDAT		(*(volatile unsigned *)0x1d40008)

void Adc_Init()
{
    DisableInt();

    rCLKCON=0x7ff8;
    IntServe_Reg( (unsigned int)ISR_ADC , (unsigned int)Adc_Int );
    rADCPSR = 199;

    rINTMSK = ~( (~rINTMSK) | BIT_ADC );

    rADCCON = 0x00;
    
    EnableInt();
}

void Adc_Start(unsigned char OnOff)
{
    ADC_ONOFF = OnOff;

    if( ADC_ONOFF == ADCON )
    {
        DisableInt();
        rADCCON = rADCCON | 0x03;
        EnableInt();
    }
}


void __irq Adc_Int()
{
    unsigned char ADCID,ADCIDBuf;
    rI_ISPC = BIT_ADC;
    
    ADCID = (rADCCON >> 2) & 0x07;
    ADCIDBuf = ADCID;
    ADCIDBuf++;
    ADCIDBuf = ( ADCIDBuf%8 ) << 2;

    if( ADC_ONOFF == ADCOFF )
    {
        rADCCON = rADCCON & 0xFC;
    }else
    {
        rADCCON = (rADCCON & 0x43) | ADCIDBuf;
    }

    ADC_DATA[ADCID] = rADCDAT;
}