P0.00 toggled on SDCard read

[hamster]

Using the sdk15 and softdevice 132 v6, I'm setting up an app to read and write to an SD card that uses SPI1 (SPI0 is used by a display).  Everything is working great, except that an LED that I have connected to P0.00 gets toggled on during SD card reads.  It works well to show SD card activity, unfortunately that LED is to be used for a different function.

I cannot seem to find anywhere in the setup or config that specifies an activity indicator or some other pin other than SCK/MISO/MOSI/CS, which are all not P0.00.  Any hints?

I also set the BSP_LED_0 to something other than pin 0, but it did not suppress this issue.

[hamster]

I'm using a custom board. Clock source is set to the internal RC.

[hamster]

I might also mention that this only happens with SDC access - the display using SPI is fine.  It almost feels like a DC pin is getting toggled on transfer or something.

[Edvin]

I can't see any particular reason for why P0.00 should behave like that. Is it possible to send the project, then maybe I can take a look at it.

 

Best regards,

Edvin