https://devzone.nordicsemi.com/f/nordic-q-a/70306/help-me-understand-the-drv_rtc_instance-macroI am reading through the code and would like to understand the following macro #define DRV_RTC_INSTANCE(id) \ { \ .p_reg = NRFX_CONCAT_2(NRF_RTC, id), \ .irq = NRFX_CONCAT_3(RTC, id, _IRQn), \ .instance_id = NRFX_CONCAT_3(DRV_RTC_RTC, id, _INST_IDXen-USTelligent Community 13Mon, 11 Jan 2021 18:53:38 GMThttps://devzone.nordicsemi.com/thread/288474?ContentTypeID=1Mon, 11 Jan 2021 18:53:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:704402f3-99d5-4020-b470-a841da153a50doryhealth<p>Thank you Einar.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/288384?ContentTypeID=1Mon, 11 Jan 2021 13:08:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6b1492ec-6e3f-422d-9a94-72780f839e82Einar Thorsrud<p>Hi&nbsp;Jerome,</p> [quote user=""]Or is it simply a concatenation of strings resulting in NRF_RTC1, in this case?[/quote] <p>Yes, that is what it is. So in this case you get:</p> <ul> <li>.p_reg =&nbsp;NRF_RTC1</li> <li>.irq =&nbsp;RTC1_IRQn</li> <li>.instance_id =&nbsp;DRV_RTC_RTC1_INST_IDX</li> <li>.cc_channel_count =&nbsp;RTC1_CC_NUM = 4</li> </ul> <p>Einar</p><div style="clear:both;"></div>