adc_pm_irq.c

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#include "adc_pm.h"
#include <LPC17xx.h>
#include <stdlib.h>
 
_PRIVATE ADC_PMInterruptHandler done_action = NULL;
 
_PRIVATE u16 prv_value = 0x0;
 
// PUBLIC FUNCTIONS
 
void ADC_PMSetSampleReadyAction(ADC_PMInterruptHandler action)
{
    done_action = action;
}
 
void ADC_PMUnsetSampleReadyAction(void)
{
    done_action = NULL;
}
 
// INTERRUPT HANDLER
 
extern void ADC_IRQHandler(void)
{
    // The interrupt reads info from the ADGDR register.
    const u16 new_value = (LPC_ADC->ADGDR >> 4) & 0xFFF;
 
    if (done_action)
        done_action(prv_value, new_value);
 
    if (new_value != prv_value)
        prv_value = new_value;
}