How to include existing header files to main.c?

RE: How to include existing header files to main.c?

awneil — Mon, 11 Feb 2019 10:39:31 GMT

[quote userid="75734" url="~/f/nordic-q-a/43204/how-to-include-existing-header-files-to-main-c/170262"]Of course[/quote]

Well, not actually "of course": it could be done - be there'd have to be some sort of multiplexing scheme on the chip, and demultiplexing at the other end ...

RE: How to include existing header files to main.c?

Simonr — Mon, 11 Feb 2019 06:52:10 GMT

Of course, the UART cannot be used as an application and a backend logger at the same time. You will have to choose one of the functionalities, and seeing as you want to use UART in your application, you have to disable the UARTs backend logger, which is NRF_LOG_BACKEND_UART. If you want a backend logger anyway, you can use the RTT (Real-Time Terminal) as your backend logger instead.

Best regards,

Simon

RE: How to include existing header files to main.c?

MRafiq9748 — Fri, 08 Feb 2019 10:08:03 GMT

Thanks a lot,

It worked fine. One request, can you please elaborate this point

[quote userid="75734" url="~/f/nordic-q-a/43204/how-to-include-existing-header-files-to-main-c/169925"]You will have to set NRF_LOG_BACKEND_UART to 0 and alternatively use RTT as your backend.[/quote]

Once again thanks.

Regards.

M Rafiq

RE: How to include existing header files to main.c?

Simonr — Thu, 07 Feb 2019 13:10:09 GMT

You can't use UART as both application and log backend. I suspect you might have both enabled in sdk_config.h. You will have to set NRF_LOG_BACKEND_UART to 0 and alternatively use RTT as your backend. If you are having further trouble, please post your sdk_config.h file so I can have a look at it.

Best regards,

Simon

RE: How to include existing header files to main.c?

MRafiq9748 — Thu, 07 Feb 2019 09:30:35 GMT

Thanks.

We have already enabled all functions accordingly in config and no error is shown.

NRF_LOG_DEFAULT_BACKENDS_INIT() creates problem.

when we comment it only uart works but when we uncomment it nothing works.

We want both UART and SPI to work .

Any help would be highly appreciated.

Best Regards,

M Rafiq.

RE: How to include existing header files to main.c?

Simonr — Mon, 04 Feb 2019 12:32:58 GMT

What most people have trouble with is forgetting to enable something in the sdk_config.h file. You have to go through the sdk_config.h file of a uart example, and make sure that all functions enabled there are also enabled in your projects sdk_config file, as in setting all functions that are set to 1 in the example sdk_config to 1 in your project as well. If there are some functions enabled in the example file that is not at all in your project, you will have to copy/paste those.

Best regards,

Simon

RE: How to include existing header files to main.c?

MRafiq9748 — Mon, 04 Feb 2019 07:14:38 GMT

Have done all the necessary steps in program,also in sdk_config.h.Its not showing any errors now,but when i look on putty nothing appears.If we comment uart portion in main, nrf_log_info statements appear.

Whats the problem?

Any help would be appreciated.

RE: How to include existing header files to main.c?

awneil — Fri, 01 Feb 2019 09:06:05 GMT

It's generally better to copy & paste errors as text - rather than a picture.

But your picture is clear enough to see in this case.

Again, this is a standard 'C' issue: header files just contain declarations (function prototypes) - so you also need to add the source (.c) file (or pre-built binary library) with the definitions of those functions.

http://c-faq.com/decl/decldef.html

And, again, there is a Nordic-specific twist that the correct settings in sdk_config.h are also required.

https://devzone.nordicsemi.com/f/nordic-q-a/39503/undefined-reference-on-the-linker-level

RE: How to include existing header files to main.c?

MRafiq9748 — Fri, 01 Feb 2019 05:44:06 GMT

I am able to include all the necessary files,but when i build it shows 2 errors.

I am attaching the picture of error message along with Screenshot of a file in program which appears in faded form.

RE: How to include existing header files to main.c?

awneil — Thu, 31 Jan 2019 11:11:22 GMT

It would have been helpful if you have said that in the first place!

Again, instructions for setting up Include Paths will be in your IDE's documentation.

http://www.keil.com/support/man/docs/uv4/

RE: How to include existing header files to main.c?

MRafiq9748 — Thu, 31 Jan 2019 11:04:10 GMT

I tried #include app_uart.h" at the first place but when it comes to specifying path,I am not having a proper picture how to do that.

Thanks for replying.

RE: How to include existing header files to main.c?

awneil — Thu, 31 Jan 2019 10:55:50 GMT

[quote userid="76918" url="~/f/nordic-q-a/43204/how-to-include-existing-header-files-to-main-c"]i am not able to add app_uart.h to main.c[/quote]

What, exactly, do you mean by that?

What have you tried?

What was the result?

[quote userid="76918" url="~/f/nordic-q-a/43204/how-to-include-existing-header-files-to-main-c"]My question here is how to add it to main,c? [/quote]

The simple answer is:

#include "app_uart.h"

In addition, as Shrinidhi Bhat said, you will have to correctly configure your Include Paths so that the compiler knows where to find the file.

The documentation for your particular IDE will tell you how to do this.

All of the above is completely standard and would be the same for any 'C' project - it is not specific to Nordic.

In addition to the above, many of the Nordic headers rely on settings in the sdk_config.h file to "enable" them - so you will also need to have these settings correct.

BTW - how to post source code:

RE: How to include existing header files to main.c?

MRafiq9748 — Thu, 31 Jan 2019 10:00:05 GMT

Thanks for the reply.

Actually I am using Keil uvison.

I'll try this method.

RE: How to include existing header files to main.c?

Shrinidhi Bhat — Thu, 31 Jan 2019 09:53:55 GMT

Hello Rafiq,

If you are asking how one adds a header file to a project you need to follow the following steps:

1) Right click on project and select options.

2) You'll see the a debug option, which can be dropped down to common (Private configurations).

3) Click on preprocessor and click on User include directories.

4) using the same format shown in the window, add a path to the header file you want to add. Here it is app_uart.h for you.

PS:- This is how Segger Embedded studio (SES) will look like. It will be something similar for other IDEs.

Best Regards,

Shrinidhi Bhat