Hi,
I am working on the ADC and trying to sense the battery level to measure it voltage.
And I have configure the ADC with normal conditions as present in example of SDK-10(S110).
I have connected my battery sense line followed by the Voltage dividing rules as mentioned in this page.
I am facing problem while taking reading from the ADC pin, it gives the constant value continuously, however if voltage goes it gives the same value.
I don't that ADC conversion is working or not.
Here I am sharing small portion of code for adc configuration kind reference. If I have gone wrong in something please correct me.
Output of ADC:
173 continuously without any changes(however voltages drops it shows the same).
My code for ADC
volatile int32_t adc_sample = 0;
void ADC_IRQHandler(void)
{
nrf_adc_conversion_event_clean();
adc_sample = nrf_adc_result_get();
}
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_1); // batt adc_sense pin at ch no. 1
nrf_adc_int_enable(ADC_INTENSET_END_Enabled << ADC_INTENSET_END_Pos);
NVIC_SetPriority(ADC_IRQn, NRF_APP_PRIORITY_HIGH);
NVIC_EnableIRQ(ADC_IRQn);
}
int main(void)
{
adc_config(); //Initialize ADC
nrf_adc_start();
nrf_gpio_cfg_output(12);
err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);
// Enter main loop.
for (;;)
{
uint8_t str[4];
sprintf((char*)str, "%d", (int)adc_sample);
ble_nus_string_send(&m_nus, str, strlen((char*)str));
nrf_gpio_pin_clear(12);
power_manage();
}
}
Looking forward for the possible guidance...
Thanks
