nRF7002DK and SPI4

RE: nRF7002DK and SPI4

JONATHAN LL — Mon, 01 Jul 2024 09:00:58 GMT

Hi Ilidio,

[quote user="ISilva"]However, as I mentioned previously, whenever I need to use the SPI with the nRF52832, I have problems with the signal generated by the CLK, especially with frequencies above 1MHZ.[/quote]

So all the following is issues specifically with the nRF52832? not the 53.

If so can you create a new ticket for this?

Regards,
Jonathan

RE: nRF7002DK and SPI4

ISilva — Tue, 25 Jun 2024 17:00:44 GMT

Hi Jonathan,

For the nRF7002 I will not need to use it again, since we chose to use another microcontroller for my project due to new requirements. I don't know if rfontaostill have problems.

However, as I mentioned previously, whenever I need to use the SPI with the nRF52832, I have problems with the signal generated by the CLK, especially with frequencies above 1MHZ.

For instance with a 2.5Mhz frequency, the clock is like this...

and for 1MHz the clock is like this

In this case the clock signal seems more correct to me. I was using SPI1.

Overlay dts file:

&spi1 {
  compatible = "nordic,nrf-spi";
  max-frequency = <2500000>;
  status = "okay";
};


&spi1_default {
  group1 {
    psels = <NRF_PSEL(SPIM_SCK, 0, 31)>,
            <NRF_PSEL(SPIM_MOSI, 0, 30)>,
            <NRF_PSEL(SPIM_MISO, 0, 29)>;
  };
};

proj.conf

# nothing here
CONFIG_GPIO=y
CONFIG_NFCT_PINS_AS_GPIOS=y

#printf configs and libc
CONFIG_CBPRINTF_FP_SUPPORT=y
CONFIG_NEWLIB_LIBC=y

#configuring clock source
#CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=y #custom board
#CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

CONFIG_STDOUT_CONSOLE=y
CONFIG_PRINTK=y

CONFIG_SPI=y
CONFIG_SOC_NRF52832_ALLOW_SPIM_DESPITE_PAN_58=y

CONFIG_LOG=y

Can you give me an opinion on why this happens?
If necessary, I can open a ticket only for this issue.

Thanks in advance,
Ilidio

RE: nRF7002DK and SPI4

JONATHAN LL — Wed, 29 May 2024 07:34:16 GMT

Can you share the build/zephyr/zephyr.dts file to see what pins you are using?

RE: nRF7002DK and SPI4

ISilva — Tue, 28 May 2024 16:08:33 GMT

Hi!

Yes, a few weeks ago I also used SPI4 with the same SOC and had the same problem.

Furthermore, in another project with another SOC, the nrf52832, I had difficulty getting the 8MHZ frequency for SPI.
If I remember correctly, at that time I was using SPI1.
For the last case with frequencies higher than 1Mhz I had some problems and sometimes clock stretching.
I don't know if the problems could be related...

If you can give me any input on this issue with the soc nRF7002DK, I would be grateful.

Thanks,
Ilidio

RE: nRF7002DK and SPI4

JONATHAN LL — Tue, 28 May 2024 12:48:58 GMT

Hello!

Unfortunate situation here but Joakim no longer works here so not sure what happened in this situation but seems that the issue still is present.

so Ilidio do you have the same issue as rfontao?

Regards,
Jonathan

RE: nRF7002DK and SPI4

rfontao — Thu, 23 May 2024 08:43:50 GMT

Hello! Are there any advances on this subject? I still haven't been able to find a solution for using SPI. For reference, I am using NCS v2.5.0.

RE: nRF7002DK and SPI4

ISilva — Wed, 08 May 2024 17:29:23 GMT

Hello all!

Joakim Jakobsen or rfontao

Do you have any new information regarding this subject?

Thanks in advance,
Ilidio

RE: nRF7002DK and SPI4

Joakim Jakobsen — Tue, 23 Apr 2024 20:05:51 GMT

Hello!

I will look at your ticket and get back to you with a response as soon as possible.

Br,
Joakim