/**@brief Function for configuring ADC to do battery level conversion.
*/
static void adc_configure(void)
{
#ifdef NRF51
nrf_adc_config_t adc_config = NRF_ADC_CONFIG_DEFAULT;
adc_config.scaling = NRF_ADC_CONFIG_SCALING_SUPPLY_ONE_THIRD;
nrf_adc_configure(&adc_config);
nrf_adc_int_enable(ADC_INTENSET_END_Msk);
NVIC_EnableIRQ(ADC_IRQn);
NVIC_SetPriority(ADC_IRQn, 3);
nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_DISABLED);
#else // NRF52
ret_code_t err_code = nrf_drv_saadc_init(NULL, saadc_event_handler);
APP_ERROR_CHECK(err_code);
nrf_saadc_channel_config_t config = NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_VDD);
err_code = nrf_drv_saadc_channel_init(0,&config);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_saadc_buffer_convert(&adc_buf[0],1);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_saadc_buffer_convert(&adc_buf[1],1);
APP_ERROR_CHECK(err_code);
#endif //NRF51
}
/**
* @brief ADC initialization.
*/
static void adc_config(void)
{
const nrf_adc_config_t nrf_adc_config = NRF_ADC_CONFIG_DEFAULT;
// Initialize and configure ADC
nrf_adc_configure( (nrf_adc_config_t *)&nrf_adc_config);
#if defined(BOARD_BVMCN5102)
nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_3);
#elif defined(BOARD_BLENANO)
nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_5);
#else
# error unknown board
#endif
nrf_adc_int_enable(ADC_INTENSET_END_Enabled << ADC_INTENSET_END_Pos);
NVIC_SetPriority(ADC_IRQn, NRF_APP_PRIORITY_LOW);
NVIC_EnableIRQ(ADC_IRQn);
}
static void adc_config(void)
{
const nrf_adc_config_t nrf_adc_config = NRF_ADC_CONFIG_DEFAULT;
nrf_adc_configure((nrf_adc_config_t *)&nrf_adc_config);
nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_4);
nrf_adc_int_enable(ADC_INTENSET_END_Enabled << ADC_INTENSET_END_Pos);
NVIC_SetPriority(ADC_IRQn, NRF_APP_PRIORITY_HIGH);
NVIC_EnableIRQ(ADC_IRQn);
}
/**
* @brief ADC initialization.
*/
void adc_config(void)
{
const nrf_adc_config_t nrf_adc_config = NRF_ADC_CONFIG_DEFAULT;
// Initialize and configure ADC
nrf_adc_configure( (nrf_adc_config_t *)&nrf_adc_config);
nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_7);
nrf_adc_int_enable(ADC_INTENSET_END_Enabled << ADC_INTENSET_END_Pos);
NVIC_SetPriority(ADC_IRQn, NRF_APP_PRIORITY_HIGH);
NVIC_EnableIRQ(ADC_IRQn);
//printf("\n\rADC Configured Corectly\r\n");
}
/**
* @brief Blocking function for executing single ADC conversion.
*
* This function selects desired input, starts single conversion,
* waits for its finish and returns result.
* ADC is left in STOP state, given input is selected.
* This function does not check if ADC is initialized and powered.
*
* @param[in] input is requested input to be selected
*
* @return conversion result
*/
int32_t nrf_adc_convert_single(nrf_adc_config_input_t input)
{
int32_t val;
nrf_adc_input_select(input);
nrf_adc_start();
while (!nrf_adc_conversion_finished())
{
}
nrf_adc_conversion_event_clean();
val = nrf_adc_result_get();
nrf_adc_stop();
return val;
}
/**
* @brief Function for configuring ADC.
*
* This function power on ADC and configure it. ADC is in DISABLE state after configuration,
* so it should be enabled before using it.
*
* @param[in] config is requested configuration
*/
void nrf_adc_configure(nrf_adc_config_t * config)
{
uint32_t config_reg = 0;
config_reg |= ((uint32_t)config->resolution << ADC_CONFIG_RES_Pos) & ADC_CONFIG_RES_Msk;
config_reg |= ((uint32_t)config->scaling << ADC_CONFIG_INPSEL_Pos) & ADC_CONFIG_INPSEL_Msk;
config_reg |= ((uint32_t)config->reference << ADC_CONFIG_REFSEL_Pos) & ADC_CONFIG_REFSEL_Msk;
if (config->reference & ADC_CONFIG_EXTREFSEL_Msk)
{
config_reg |= config->reference & ADC_CONFIG_EXTREFSEL_Msk;
}
/* select input */
nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_DISABLED);
/* set new configuration keeping selected input */
NRF_ADC->CONFIG = config_reg | (NRF_ADC->CONFIG & ADC_CONFIG_PSEL_Msk);
}
