How can I use "Esb" and "App timer" at the same time?

[chianglin]

Hi,

I an try to use "Esb function" and "App timer function (app_timer_create() and app_timer_start()" in the same project, but there have one following link error message.

.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol SWI0_EGU0_IRQHandler multiply defined (by nrf_esb.o and app_timer.o).

How can I solve this problem.

Thank you,

Chianglin

[ovrebekk]

Hi Ives

You can change the software interrupt handler used in nrf_esb.h, to avoid the conflict with the app timer library. 

A common trick is to hijack the interrupt vector off a peripheral that you don't need in the application, to avoid using all the software interrupts. 

As an example, the QDEC peripheral is very specialized and is usually not required by the application. If this is the case for you also just change lines 137-138 in nrf_esb.h as such:

#define ESB_EVT_IRQ QDEC_IRQn //!< The ESB event IRQ number when running on an nRF5 device.
#define ESB_EVT_IRQHandler QDEC_IRQHandler //!< The handler for @ref ESB_EVT_IRQ when running on an nRF5 device.

Best regards
Torbjørn

[chianglin]

Hi Torbjørn,

Thank you for your answer.

Please reference the attach file.

I am trying to create timer to trigger task "RxPacketProcess_timeout_handler()", which can print a message "(0001)" via UART interface every two seconds.

But, it can not print "(0001)" message to my PC via UART interface.

Would you please tell me how to modify it?

Code.7z

Thank you,

Chianglin

[ovrebekk]

Hi Ives

Does the example print anything at all?

I flashed your code, but I can't see any activity on the UART. 

Best regards
Torbjørn

[chianglin]

Hi Torbjørn,

I think there have some error when execute "app_timer_init()" or "app_timer_create()" function, so the task "RxPacketProcess_timeout_handler()" does not trigger for print UART message.

Would you please tell me how to modify the source code, then the "APP Timer" can work correctly?

Thank you,

Chianglin

[chianglin]

Hi Torbjørn,

Would you please give me a sample which can use ESB and "App_Timer" function at the same time?

 

Thank you,

Chianglin

[chianglin]

Hi Torbjørn,

Would you please give me a sample which can use ESB and "App_Timer" function at the same time?

 

Thank you,

Chianglin

[ovrebekk]

Hi Ives

Sorry for the slow response. I started work on an example, but ran into a weird Keil issue that I didn't have time to figure out (the example would only run without optimization enabled). I am preparing for a workshop tomorrow and have little time for Devzone right now. 

If I can't solve the issue by the end of the day I will send you what I have anyway, and you can have a look at it. Next week I will be back in the office with more time to assist you if there are still issues. 

Best regards
Torbjørn

[chianglin]

Hi Torbjørn,

Thank you for your assistance. I wish you all the best in the seminar tomorrow.

Best Regards,

Chianglin

[ovrebekk]

Hi Ives

Thanks a lot, the seminar went fine ;)

I have attached the example I made. It's for SDK v15.2, and I tested it on the nRF52DK (nRF52832). 
esb_template_app_timer.zip

The ESB PTX example is changed to use an app_timer to schedule packet transmissions, rather than using a delay in the main loop. 
The PRX example is not changed from the original. 

I copied the ESB files into a local folder to avoid having to change the SDK files directly. 

Best regards
Torbjørn