https://devzone.nordicsemi.com/f/nordic-q-a/19144/two-analog-signal-using-saadc-nrf52-dk-nrf52832Hi all, I need to take samples of a period of two periodic signals and made some DSP processing with both signals. I need at least 64 to 128 samples per signals. I been struggled with the SDK and the examples provided (This is my first projecten-USTelligent Community 13Mon, 23 Jan 2017 15:24:15 GMThttps://devzone.nordicsemi.com/thread/74092?ContentTypeID=1Mon, 23 Jan 2017 15:24:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3f8091b4-ab72-4d82-b454-a7ee84d0532cJ&#248;rgen Holmefjord<p>Hi,</p> <p>You can use <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/saadc.html?cp=2_2_0_36_4_3#saadc_operationmodes_scan">scan mode</a> and a timer to achieve this. By enabling two channels and use PPI to trigger the start task at the sampling rate you want. By calling nrf_drv_saadc_buffer_convert() with the desired amount of samples as a parameter, you will get a <code>NRF_DRV_SAADC_EVT_DONE</code> event when the buffer is full. You can then stop the timer if you do not want more samples. The <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/saadc.html?cp=2_2_0_36_5#saadc_easydma">timeline of the SAADC</a> is shown in the documentation.</p> <p>I guess <a href="https://github.com/NordicSemiconductor/nRF52-ADC-examples/tree/master/ble_app_uart__saadc_timer_driven__scan_mode">this is the example</a> you are referring to? Even though this is not exactly what you want to do, I think it is still a good starting point for your application. You can strip away the parts not relevant for your application. Are you not going to use BLE at all?</p> <p>Best regards,</p> <p>Jørgen</p><div style="clear:both;"></div>