nRF5340 SPI Master example code

RE: nRF5340 SPI Master example code

Jared — Mon, 19 Sep 2022 09:16:12 GMT

Hi,

You can look at the Bluetooth: Peripheral Heart Rate Monitor with Coded PHY in NCS, it uses work queue. I suggest to also read the documentation I shared in my previous reply.

regards

Jared

RE: nRF5340 SPI Master example code

Franci — Fri, 16 Sep 2022 04:31:04 GMT

Hi Jared,

Could you provide some examples of a work queue. This SPI read and write operation is time sensitive and it must occur at a specific interval (in my application that interval is 1us).

Best regards,

Franci

RE: nRF5340 SPI Master example code

Jared — Thu, 15 Sep 2022 11:58:57 GMT

Hi,

Ok, but I think the end result is somewhat the same as you're calling it in the timer handler. Could you instead try to offload it to a work queue every time the callback handler is called?

regards
Jared

RE: nRF5340 SPI Master example code

Franci — Wed, 14 Sep 2022 04:44:45 GMT

Hi Jared,

No, I am trying to call spi_write_test(). I am not attempting to use SOC integrated ADC. I am using an external ADC. Please see lines 527-535 in main.c.

I added timer0 functionality and SPI master to the central_and_perpheral_hr example. Moreover, I will need two master SPI interfaces. One for external DAC and one for external ADC. The ADC and the DAC will operate at a same time.

Timer0 elapsed event works as expected but every time when spi_write_test() is called the soc resets.

void timer0_elapsed(struct k_timer *timer_id)
{

value = !value;
dk_set_led(DK_LED2, value);
//spi_write_test_msg();
spi_write_test();

}

Thank you,

Franci

RE: nRF5340 SPI Master example code

Jared — Tue, 13 Sep 2022 13:51:30 GMT

Hi there,

Are you able to run the example without any modifications? And what modifications did you do to the project? The program is asserting here, is there a chance that you're trying to call the adc_sample from the timer callback as in this case?

regards

Jared

RE: nRF5340 SPI Master example code

helsing — Mon, 05 Sep 2022 13:47:36 GMT

Hi Franci, sorry you have not heard from us. The case is at least open now. We will get back to you.

RE: nRF5340 SPI Master example code

Franci — Sat, 03 Sep 2022 03:01:17 GMT

I see that this ticket is closed but I did not get any answer.

RE: nRF5340 SPI Master example code

helsing — Tue, 30 Aug 2022 07:46:40 GMT

Hi Franci,

I have taken over this case as Jared is out of office. I will look into this and get back to you.

RE: nRF5340 SPI Master example code

Franci — Mon, 29 Aug 2022 04:46:49 GMT

Hi Derek,

I attempted to use your example and combine it with my code. I need only master SPI driver since my peripheral devices are ADC and DAC. For now, I am trying to make ADC work. I am using timer to start SPI transmit and receive operations. Eventually I will need two SPI master interfaces because ADC and DAC must operate simultaneously.

I am able to run timer at desired frequency and initialize SPI interface without any error message but every time when I attempt to send or receive data using SPI the board (nRF5340 DK) reboots.

Zephyr RTOS is new to me, and I have difficulties to find what is the cause of the problem.

Below is the debug terminal screenshot and my link to my code is here.

RE: nRF5340 SPI Master example code

Jared — Thu, 25 Aug 2022 11:42:44 GMT

Hi,

Could you try this example? You still need to change the frequency though.

regards

Jared