Problem while using SPI4 and UART1 together in nrf5340

RE: Problem while using SPI4 and UART1 together in nrf5340

Einarh — Mon, 12 Sep 2022 11:47:02 GMT

When UART communication fails and the device keeps restarting, do you get any error messages in the log?

Have you tried scoping the pins?

RE: Problem while using SPI4 and UART1 together in nrf5340

ShuMan — Mon, 12 Sep 2022 06:53:18 GMT

I am attaching the fat_fs sample with my overlay file. The example is working for me and I am able to read and write to the SD card.

devzone.nordicsemi.com/.../fat_5F00_fs_5F00_spi4.zip

-Shubham

RE: Problem while using SPI4 and UART1 together in nrf5340

Einarh — Fri, 09 Sep 2022 11:27:54 GMT

Have you tested the fat_fs sample with your overlay file, or only with the default configuration?

I'm suspecting you might need a storage_dev pointer in your fs_mount_t struct when you're using a custom config. Are you doing this?

-Einar

RE: Problem while using SPI4 and UART1 together in nrf5340

ShuMan — Thu, 08 Sep 2022 15:49:26 GMT

Hi Einarh,

Below is the attached zip file with combined prj.conf and nrf5340dk_nrf5340_cpuapp.overlay files. Previously, I have referred fat_fs and UART examples.

devzone.nordicsemi.com/.../prj_5F00_overlay.zip

If CONFIG_DISK_DRIVER_SDMMC=y & CONFIG_SPI=y lines are not commented then UART communication fails over UART and nrf5340 keeps on restarting.

If CONFIG_DISK_DRIVER_SDMMC=y & CONFIG_SPI=y lines are commented then UART communication works over UART1 but SD card initialization fails (as SDMMC and SPI are not configured).

Thanks

RE: Problem while using SPI4 and UART1 together in nrf5340

Einarh — Thu, 08 Sep 2022 12:25:48 GMT

Hello

[quote user=""]

However, when I tried to combine fat_fs into UART example, I am unable to initialise them together.

[/quote]

What exactly do you mean by "unable"?

Can you share any error messages or logs etc giving any info on why/how it fails?

Best regards,

Einar