/**@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
}
void adc_init(void)
{
nrf_saadc_channel_config_t adc_channel_config = NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(MBED_SHIELD_A0_POT_1);
nrf_drv_saadc_config_t adc_config = NRF_DRV_SAADC_DEFAULT_CONFIG;
adc_config.resolution = NRF_SAADC_RESOLUTION_8BIT;
nrf_drv_saadc_channel_init(0, &adc_channel_config);
nrf_drv_saadc_init(&adc_config, &adc_event);
}
void saadc_init(void)
{
ret_code_t err_code;
nrf_saadc_channel_config_t channel_config =
NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN1);
err_code = nrf_drv_saadc_init(NULL, saadc_callback);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_saadc_channel_init(0, &channel_config);
APP_ERROR_CHECK(err_code);
}
void analogin_init(analogin_t *obj, PinName pin)
{
ret_code_t ret_code;
NVIC_SetVector(SAADC_IRQn, (uint32_t)SAADC_IRQHandler);
ret_code = nrf_drv_saadc_init(&saadc_config, analog_in_event_handler);
MBED_ASSERT(((ret_code == NRF_SUCCESS) || (ret_code == NRF_ERROR_INVALID_STATE))); //NRF_ERROR_INVALID_STATE expected for multiple channels used.
uint8_t saadcIn = nrf_drv_saadc_gpio_to_ain(pin);
MBED_ASSERT(saadcIn != NRF_SAADC_INPUT_DISABLED);
obj->adc = ADC0_0; // only one instance of ADC in nRF52 SoC
obj->adc_pin = saadcIn - 1;
nrf_saadc_channel_config_t channel_config =
NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(saadcIn); //Single ended, negative input to ADC shorted to GND.
ret_code = nrf_drv_saadc_channel_init(obj->adc_pin, &channel_config);
MBED_ASSERT(ret_code == NRF_SUCCESS);
}
/* ADC channel used to call conversion. */
static nrf_drv_adc_channel_t adc_channel = NRF_DRV_ADC_DEFAULT_CHANNEL(0);
#elif defined(SAADC_PRESENT)
#include "nrf_drv_saadc.h"
/**
* @defgroup saadc_defines SAADC defines to count input voltage.
* @{
*/
#define SAADC_RES_10BIT 1024
#define SAADC_INPUT_PRESCALER 3
#define SAADC_REF_VBG_VOLTAGE 0.6
/* @} */
/* SAADC channel used to call conversion. */
static nrf_saadc_channel_config_t saadc_channel = NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN0);
#endif //ADC_PRESENT
#endif //USE_COMP
#if USE_COMP
/* Number of channels required by PPI. */
#define PPI_REQUIRED_CHANNELS 3
/* Array of PPI channels. */
static nrf_ppi_channel_t m_ppi_channels[PPI_REQUIRED_CHANNELS];
/**
* @defgroup timer_instances Timer instances.
* @{
*/
