OSStatus platform_adc_take_sample( const platform_adc_t* adc, uint16_t* output )
{
OSStatus err = kNoErr;
platform_mcu_powersave_disable();
require_action_quiet( adc != NULL, exit, err = kParamErr);
channel_num = adc->channel;
adc_channel_enable(ADC, adc->channel);
adc_set_callback(ADC, adc->interrupt, adc_end_conversion, 1);
/* Start conversion */
adc_start_software_conversion(ADC);
adc_start_calibration(ADC);
while (adc_get_interrupt_status(ADC) & (1 << adc->channel));
*output = adc_channel_get_value(ADC, adc->channel);
mico_thread_msleep(1);
adc_channel_disable(ADC, adc->channel);
exit:
platform_mcu_powersave_enable();
return err;
}
/**
* \internal
* \brief Call the callback function if the corresponding interrupt is asserted
*
* \param adc Base address of the ADC.
*/
static void adc_process_callback(Adc *const adc)
{
volatile uint32_t status;
uint32_t cnt;
status = adc_get_interrupt_status(adc);
for (cnt = 0; cnt < ADC_NUM_OF_INTERRUPT_SOURCE; cnt++) {
if (status & adc_interrupt_mask[cnt]) {
adc_interrupt((enum adc_interrupt_source)cnt);
}
}
}
/**
* \brief Initialize the ADC Module.
*
* \param adc Base address of the ADC
* \param config Configuration for the ADC
*
* \retval STATUS_OK Initialization is finished.
* \retval STATUS_ERR_BUSY Initialization failed.
*/
enum status_code adc_init(Adc *const adc, struct adc_config *config)
{
Assert(adc);
Assert(config);
if ((adc_get_interrupt_status(adc) & ADC_ISR_DRDY) == ADC_ISR_DRDY) {
return STATUS_ERR_BUSY;
}
/* Reset and configure the ADC module */
adc->ADC_CR = ADC_CR_SWRST;
adc_set_config(adc, config);
uint32_t i;
for (i = 0; i < ADC_NUM_OF_INTERRUPT_SOURCE; i++) {
adc_callback_pointer[i] = 0;
}
return STATUS_OK;
}
