SAADC Limit Disabled Value

[WestCoastDaz]

In SDK 12.2, why is the SAADC #define NRF_DRV_SAADC_LIMITH_DISABLED (2047) set to this value? On a reset the register is set to 32767 according to the product spec and my tests using the debugger.

If I have a single ended channel then my upper limit is 4095 but I can't set this upper limit using nrf_drv_saadc_limits_set since it will assert on line 586 of nrf_drv_saadc.c ASSERT(limit_high <= NRF_DRV_SAADC_LIMITH_DISABLED);

Thanks, Darren

[WestCoastDaz]

Jorgen,

Thanks for taking the time to reply and for looking into this issue. I'm not sure that I understand your last statement "You should not need higher values for 12-bits though, as 2047 - (-2048) gives 4095 (2^12-1)." If a channel is configured as single ended, with 12bits of resolution, then my maximum count value will be 4095 which is over the maximum limit of 2047.

Thanks, Darren