SPI MISO pull up on NRF52840 DK 2.0.1 board

RE: SPI MISO pull up on NRF52840 DK 2.0.1 board

flash — Mon, 31 Aug 2020 04:58:14 GMT

Thanks for your help.

Have a good day.

RE: SPI MISO pull up on NRF52840 DK 2.0.1 board

Jared — Fri, 28 Aug 2020 07:06:42 GMT

[quote user="flash"]could you explain the difference between SPIM and SPI[/quote]

The difference is mainly in that SPIM uses the EasyDMA bus to transfer data directly to RAM. EasyDMA gives the peripherals directly access to Data Ram without having to go through the CPU. The SPI peripheral does not have this feature and is also not recommended for future designs as it's for legacy.

RE: SPI MISO pull up on NRF52840 DK 2.0.1 board

flash — Thu, 27 Aug 2020 07:55:09 GMT

Hi Jared,

In the case of the MISO, it works fine now.

BTW, could you explain the difference between SPIM and SPI?

Best Regards,

RE: SPI MISO pull up on NRF52840 DK 2.0.1 board

Jared — Thu, 27 Aug 2020 07:42:55 GMT

Hi,

I meant to write SPIM peripheral not SPI in my previous reply. I see that you have set all Pull definitions in the config file to pull-up. Does it still not work? How are you checking the state of the pin?

regards

Jared

RE: SPI MISO pull up on NRF52840 DK 2.0.1 board

flash — Thu, 27 Aug 2020 01:02:53 GMT

devzone.nordicsemi.com/.../3480.sdk_5F00_config.h

I upload the sdk_config.h file. Thanks.

RE: SPI MISO pull up on NRF52840 DK 2.0.1 board

flash — Thu, 27 Aug 2020 00:56:46 GMT

Dear Jared,

Thanks for your kind support.

This is the first time handling Nordic NRF series. So, I have many wrong settings in the software.

Seems you're using the SPI peripheral and are setting the wrong define. -> I cannot find what's wrong in my setting.

Which peripheral is enabled in your config file? -> I'm not sure what you are checking? sdk_config.h file? I attach the file. Please, review it.

Please, help.

RE: SPI MISO pull up on NRF52840 DK 2.0.1 board

Jared — Wed, 26 Aug 2020 12:41:24 GMT

Hi,

Seems you're using the SPI peripheral and are setting the wrong define. Which peripheral is enabled in your config file? I tried setting the define for the SPI peripheral in the SPI example from the SDK as below, and the result was a activation of the pullup on MISO:

#ifndef NRF_SPI_DRV_MISO_PULLUP_CFG
#define NRF_SPI_DRV_MISO_PULLUP_CFG 3
#endif