SOFTDEVICE: INVALID MEMORY ACCESS and NRF_FAULT_ID_APP_MEMACC

RE: SOFTDEVICE: INVALID MEMORY ACCESS and NRF_FAULT_ID_APP_MEMACC

Jared — Tue, 01 Mar 2022 13:44:15 GMT

The Softdevice offers limited options when using the RNG peripheral with SD enabled. See the functions that start with sd_rand..

regards

Jared

RE: SOFTDEVICE: INVALID MEMORY ACCESS and NRF_FAULT_ID_APP_MEMACC

Taylor — Tue, 01 Mar 2022 10:04:12 GMT

Thanks！

I have found the sd_temp_get(int32_t * p_temp) in nrf_soc.h file, so I need to use like this:

int32_t random_value;
		
sd_temp_get(&random_value);

random_value = random_value*0.24;

NRF_LOG_INFO("Temp: %d",random_value);

But I cant find the API to get RNG.

RE: SOFTDEVICE: INVALID MEMORY ACCESS and NRF_FAULT_ID_APP_MEMACC

Jared — Tue, 01 Mar 2022 08:31:37 GMT

It's pretty straightforward, just call the function and it will return with the computed value. For example, if you want to get know the temperature, then you call sd_temp_get(), and it will return with a uint32_t representing the die temperature in 0.25 Celsius. Something like this:

uint32_t temp;

temp = sd_temp_get();

temp = temp * 0.25;

NRF_LOG_INFO("Temperature of the Die is: %d",temp);

regards

Jared

RE: SOFTDEVICE: INVALID MEMORY ACCESS and NRF_FAULT_ID_APP_MEMACC

Taylor — Tue, 01 Mar 2022 05:56:58 GMT

I have used normally with S112 on nRF52810. But RNG and TEMP is "Restricted" in S112 . I guess if I used like that will occur an unpredictable error, right?

BTW, could you please show an example about how to use SD API of RNG or TEMP?

RE: SOFTDEVICE: INVALID MEMORY ACCESS and NRF_FAULT_ID_APP_MEMACC

Jared — Mon, 28 Feb 2022 10:16:18 GMT

Hi,

You need to use the Softdevice API when accessing the RNG peripheral when the Softdevice is enabled.

See more about what resources the Softdevice use here.

regards

Jared