UART and Timer conflict

[paul_tanner]

I am using SDK12 with nrf52832.  UART working fine (with FIFO)  and Timer1 also works.

I wanted to set a 1 minute timeout around the UART dialog to handle disconnection etc. 

However, if I enable Timer1 when waiting for a response from the UART the timer responds as expected but the responses from the UART no longer occur.  Specifically, the UART's event handler is no longer called.

This looks like some kind of a conflict but I'm not sure where and why?

Thx.

[masloooo]

hi, I came across the same problem. Did u solve it?

[Edvin]

Hello,

What SDK version do you use? Is the problem that the event handler does not get called? If you could attach the project, I could take a look at it.

 

Best regards,

Edvin

[masloooo]

hi, Edvin.

I'm using SDK 12.1.0 and code in PCA10040. I attach the project heretimer+uart.rar.

I haven't check the handler... I just noticed that if I init the timer(0-4) before UART, then UART won't function.

Same thing happens when I init UART(then timer won't work.) 

[Edvin]

I can't find the sdk_config.h file for your project. Is it included? Also, can you check your APP_ERROR_CHECK(...)s? Do any of them receive an input that is not NRF_SUCCESS?

 

You can check this by enabling DEBUG in your preprocessor defines, and then set a breakpoint on line 48 in app_error.c. Check if the breakpoint is hit sometime during debug.

 

Best regards,

Edvin

[masloooo]

My settings are included in the nrf_drv_config.h

[Edvin]

Ok. Still missing quite a few variables.

Are you able to compile your project in an unmodified version of the sdk? Try to download it from here, and extract your project into it, and see what files you are missing. I need them to be able to compile the project.

 

Best regards,

Edvin

[masloooo]

downloading...

BTW r u using the code in arm4(within my code path)?

[masloooo]

sorry for the wrong info.. the version I'm using is SDK 11

[Edvin]

Ok,

So the problem is not that nothing is working when you enable the uart. The problem is that when you enable the uart (I assume that you mean the part between the comments:

// uart test

    ...

// uart test done

?

 

The call:

while(app_uart_get(&cr) != NRF_SUCCESS);

is a blocking call. When you include this, then nothing will happen before you get a character on the uart. You can test this by sending a character on the uart. Disable the flow control in uart_init() first, as many UART terminals for computers are not too god at handling flow control.

 

Best regards,

Edvin