High speed UART with libuarte -> "Unexpected RX free input parameter"

RE: High speed UART with libuarte -> "Unexpected RX free input parameter"

Sigurd — Wed, 12 Feb 2020 15:26:17 GMT

Great!

[quote userid="87092" url="~/f/nordic-q-a/57349/high-speed-uart-with-libuarte---unexpected-rx-free-input-parameter/234015"]Is it necessary to switch to right project?[/quote]

Yes, you should use the pca10056 projects when using the nRF52840. The pca10056 projects are configured to use the correct register header files and startup code for the nRF52840.

RE: High speed UART with libuarte -> "Unexpected RX free input parameter"

VGKilian — Wed, 12 Feb 2020 14:28:32 GMT

You are right i use the wrong project!

After placing nrf_libuarte_async_rx_free function at the right spot, every thing works fine.

Is it necessary to switch to right project?

RE: High speed UART with libuarte -> "Unexpected RX free input parameter"

VGKilian — Wed, 12 Feb 2020 14:13:16 GMT

I found the error.

The nrf_libuarte_async_rx_free function() was called in the wrong place.

Thanks for your help!!!

RE: High speed UART with libuarte -> "Unexpected RX free input parameter"

Sigurd — Tue, 11 Feb 2020 12:50:29 GMT

[quote user="VGKilian"]Any idea how to fix it?[/quote]

Are you sure that you are using the nRF52840(pca10056) project ? Maybe you are using the nRF52832(pca10040) project ?

MAX_DMA_XFER_LEN for nRF52840 is 65535, but for nRF52832 it's 255.

RE: High speed UART with libuarte -> "Unexpected RX free input parameter"

VGKilian — Thu, 06 Feb 2020 08:19:56 GMT

I'm not able to increase _rx_buf_size because of line 584 in nrf_libuarte_drv.c.

ASSERT(len <= MAX_DMA_XFER_LEN);

In my case len ist 512 and MAX_DMA_XFER_LEN is 255. -> #define MAX_DMA_XFER_LEN ((1UL << UARTE0_EASYDMA_MAXCNT_SIZE) - 1)

Any idea how to fix it?

RE: High speed UART with libuarte -> "Unexpected RX free input parameter"

VGKilian — Wed, 05 Feb 2020 07:20:15 GMT

Hi Siguard,

The amount of send data is not constant, but it is less then 100 bytes per telegram.

I tried to increase the _rx_buf_size to 512. After that the app_error_fault_handler() function is called short time after bootup.

Logging:

<error> app: ERROR 3735928559 [Unknown error code] at [myFolder]\nRF5_SDK_16.0.0_98a08e2/componB

Sadly the error message is truncated.

Best Regards,

Kilian

RE: High speed UART with libuarte -> "Unexpected RX free input parameter"

Sigurd — Tue, 04 Feb 2020 12:13:58 GMT

Hi,

How many bytes are you sending ?

Could you try to increase the _rx_buf_size used in NRF_LIBUARTE_ASYNC_DEFINE() (default in the libuarte example is 255)