peripheral_uart: Not able to allocate UART receive buffer

[esisk]

I keep getting this warning message while I'm running the peripheral_uart sample on a nRF52820. Anybody had experience with this? I assume it has something to do with my heap size since k_malloc is getting called, but it seems reasonable and I can't find any useful config settings similar in previous posts.

[Sigurd]

Hi,

Try increasing CONFIG_HEAP_MEM_POOL_SIZE in prj.conf

[esisk]

I figured it out. For anyone who needs it:

I'm using a custom board and there is no flash connected to the 820 chip. The prj_minimal.conf attempts to use the flash for the heap, so setting 

CONFIG_FLASH=n

CONFIG_FLASH_PAGE_LAYOUT=n

CONFIG_FLASH_MAP=n

CONFIG_NVS=n

makes sure the heap is using RAM. Hope this help people!