/**
* @brief Timer event handler for the capacitive sensor.
*
* @param[in] p_context General purpose pointer. Will be passed to the time-out handler
* when the timer expires.
*
*/
static void csense_timeout_handler(void * p_context)
{
ret_code_t err_code;
err_code = nrf_drv_csense_sample();
if (err_code != NRF_SUCCESS)
{
NRF_LOG_INFO("Busy.\r\n");
return;
}
}
/**
* @brief Function for handling conversion values.
*
* @param[in] val Value received from ADC or COMP.
*/
static void conversion_handler(uint16_t val)
{
nrf_drv_csense_evt_t event_struct;
#if USE_COMP == 0
nrf_gpio_pin_set(m_csense.output_pin);
#endif //USE_COMP
m_csense.analog_values[m_csense.cur_chann_idx] = val;
event_struct.read_value = val;
event_struct.analog_channel = m_csense.cur_chann_idx;
m_csense.channels_to_read &= ~(1UL<<m_csense.cur_chann_idx);
// decide if there will be more conversions
if(m_csense.channels_to_read == 0)
{
m_csense.busy = false;
#if USE_COMP == 0 && defined(SAADC_PRESENT)
nrf_saadc_disable();
#endif
}
m_csense.event_handler(&event_struct);
if(m_csense.channels_to_read > 0) // Start new conversion.
{
ret_code_t err_code;
calculate_next_channel();
err_code = nrf_drv_csense_sample();
if(err_code != NRF_SUCCESS)
{
return;
}
}
}
/**
* @brief Function for configuring pads threshold.
*/
void configure_thresholds(void)
{
ret_code_t err_code;
uint32_t new_th_pad_1;
uint32_t new_th_pad_2;
for (int i = 0; i < 2; i++)
{
max_value[i] = 0;
min_value[i] = UINT32_MAX;
}
NRF_LOG_INFO("Touch both pads.\r\n");
NRF_LOG_FLUSH();
nrf_delay_ms(1000);
NRF_LOG_INFO("3...\r\n");
NRF_LOG_FLUSH();
nrf_delay_ms(1000);
NRF_LOG_INFO("2...\r\n");
NRF_LOG_FLUSH();
nrf_delay_ms(1000);
NRF_LOG_INFO("1...\r\n");
NRF_LOG_FLUSH();
err_code = nrf_drv_csense_sample();
if (err_code != NRF_SUCCESS)
{
NRF_LOG_INFO("Busy.\n");
return;
}
while (nrf_drv_csense_is_busy());
NRF_LOG_INFO("Release both pads.\r\n");
NRF_LOG_FLUSH();
nrf_delay_ms(1000);
NRF_LOG_INFO("3...\r\n");
NRF_LOG_FLUSH();
nrf_delay_ms(1000);
NRF_LOG_INFO("2...\r\n");
NRF_LOG_FLUSH();
nrf_delay_ms(1000);
NRF_LOG_INFO("1...\r\n");
NRF_LOG_FLUSH();
err_code = nrf_drv_csense_sample();
if (err_code != NRF_SUCCESS)
{
NRF_LOG_INFO("Busy.\n");
return;
}
while (nrf_drv_csense_is_busy());
nrf_delay_ms(100);
new_th_pad_1 = max_value[PAD_ID_0];
new_th_pad_1 += min_value[PAD_ID_0];
new_th_pad_1 /= 2;
new_th_pad_2 = max_value[PAD_ID_1];
new_th_pad_2 += min_value[PAD_ID_1];
new_th_pad_2 /= 2;
threshold_value_pad1 = new_th_pad_1;
threshold_value_pad2 = new_th_pad_2;
NRF_LOG_INFO("New thresholds, AIN1: %d, AIN7: %d.\r\n", (unsigned int)new_th_pad_1,
(unsigned int)new_th_pad_2);
}