Hello there, I am working on a customized nrf52832 board. For the limited size, the 32kHz crystal is not install because I think the clock from 32khz crystal can be replaced by 32MHz oscillator.. Now I am debugging the board and change the NRF_SDH_CLOCK_LF_SRC, NRFX_CLOCK_CONFIG_LF_SRC, CLOCK_CONFIG_LF_SRC to 1, NRF_SDH_CLOCK_LF_RC_CTIV to 16, NRF_SDH_CLOCK_LF_RC_TEMP_CTIV to 2, NRF_SDH_CLOCK_LF_ACCURACY to 1.
// <e> NRF_CLOCK_ENABLED - nrf_drv_clock - CLOCK peripheral driver - legacy layer //========================================================== #ifndef NRF_CLOCK_ENABLED #define NRF_CLOCK_ENABLED 1 #endif // <o> CLOCK_CONFIG_LF_SRC - LF Clock Source // <0=> RC // <1=> XTAL // <2=> Synth // <131073=> External Low Swing // <196609=> External Full Swing #ifndef CLOCK_CONFIG_LF_SRC #define CLOCK_CONFIG_LF_SRC 0 // 1 #endif // <e> NRFX_CLOCK_ENABLED - nrfx_clock - CLOCK peripheral driver //========================================================== #ifndef NRFX_CLOCK_ENABLED #define NRFX_CLOCK_ENABLED 1 #endif // <o> NRFX_CLOCK_CONFIG_LF_SRC - LF Clock Source // <0=> RC // <1=> XTAL // <2=> Synth // <131073=> External Low Swing // <196609=> External Full Swing #ifndef NRFX_CLOCK_CONFIG_LF_SRC #define NRFX_CLOCK_CONFIG_LF_SRC 0 // 1 #endif //========================================================== // <o> NRF_SDH_CLOCK_LF_SRC - SoftDevice clock source. // <0=> NRF_CLOCK_LF_SRC_RC // <1=> NRF_CLOCK_LF_SRC_XTAL // <2=> NRF_CLOCK_LF_SRC_SYNTH #ifndef NRF_SDH_CLOCK_LF_SRC #define NRF_SDH_CLOCK_LF_SRC 0 // 1 #endif // <o> NRF_SDH_CLOCK_LF_RC_CTIV - SoftDevice calibration timer interval. #ifndef NRF_SDH_CLOCK_LF_RC_CTIV #define NRF_SDH_CLOCK_LF_RC_CTIV 16 #endif // <o> NRF_SDH_CLOCK_LF_RC_TEMP_CTIV - SoftDevice calibration timer interval under constant temperature. // <i> How often (in number of calibration intervals) the RC oscillator shall be calibrated // <i> if the temperature has not changed. #ifndef NRF_SDH_CLOCK_LF_RC_TEMP_CTIV #define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 2 #endif // <o> NRF_SDH_CLOCK_LF_ACCURACY - External clock accuracy used in the LL to compute timing. // <0=> NRF_CLOCK_LF_ACCURACY_250_PPM // <1=> NRF_CLOCK_LF_ACCURACY_500_PPM // <2=> NRF_CLOCK_LF_ACCURACY_150_PPM // <3=> NRF_CLOCK_LF_ACCURACY_100_PPM // <4=> NRF_CLOCK_LF_ACCURACY_75_PPM // <5=> NRF_CLOCK_LF_ACCURACY_50_PPM // <6=> NRF_CLOCK_LF_ACCURACY_30_PPM // <7=> NRF_CLOCK_LF_ACCURACY_20_PPM // <8=> NRF_CLOCK_LF_ACCURACY_10_PPM // <9=> NRF_CLOCK_LF_ACCURACY_5_PPM // <10=> NRF_CLOCK_LF_ACCURACY_2_PPM // <11=> NRF_CLOCK_LF_ACCURACY_1_PPM #ifndef NRF_SDH_CLOCK_LF_ACCURACY #define NRF_SDH_CLOCK_LF_ACCURACY 1 // 7 #endif
The firmware version is 17.0.2 and the firmware code is modified from ble_app_uart__saadc_timer_driven__scan_mode from NORDIC PLAYGROUND in Github.
Now the code can running into "saadc_callback" function and the timer works well. But I can't scan the advertising from the customized board with "nRF Connect" app on cell phone. What other parameters should I change? Any help will be appreciated.
void saadc_callback(nrf_drv_saadc_evt_t const * p_event)
{
if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
{
ret_code_t err_code;
uint16_t adc_value;
uint8_t value[SAADC_SAMPLES_IN_BUFFER*2];
uint16_t bytes_to_send;
// set buffers
err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, SAADC_SAMPLES_IN_BUFFER);
APP_ERROR_CHECK(err_code);
// print samples on hardware UART and parse data for BLE transmission
printf("ADC event number: %d\r\n",(int)m_adc_evt_counter);
for (int i = 0; i < SAADC_SAMPLES_IN_BUFFER; i++)
{
printf("%d\r\n", p_event->data.done.p_buffer[i]);
adc_value = p_event->data.done.p_buffer[i];
value[i*2] = adc_value;
value[(i*2)+1] = adc_value >> 8;
}
// Send data over BLE via NUS service. Create string from samples and send string with correct length.
uint8_t nus_string[50];
bytes_to_send = sprintf(nus_string,
"CH0: %d\r\nCH1: %d\r\nCH2: %d\r\nCH3: %d",
p_event->data.done.p_buffer[0],
p_event->data.done.p_buffer[1],
p_event->data.done.p_buffer[2],
p_event->data.done.p_buffer[3]);
err_code = ble_nus_data_send(&m_nus, nus_string, &bytes_to_send, m_conn_handle);
if ((err_code != NRF_ERROR_INVALID_STATE) && (err_code != NRF_ERROR_NOT_FOUND))
{
APP_ERROR_CHECK(err_code);
}
NRF_LOG_INFO("Debug logging for UART over RTT started.");
m_adc_evt_counter++;
}
}
