Nordic Gazell resources timer

[A_Caron]

Hi every one,

I'm working on a custom broad and I'm trying to setup a gazell based protocol. I had a solution using soft device and BLE which worked fine but we want to skip connection step and get more data efficiency.

On device part, I want to retrieve information from a smart card, to do so, I must start a timer and use on PPI channel. But when I do, gazell doesn't respond anymore.

I read the documentation and I use different resources but I can't figure out what happen.

I had tried to use both gazell library (with and without soft device) (gzll_gcc.a / gzll_sd_resource_gcc.a) but anyway it seem to use the same resource TIMER 2 PPI 0, 1, 2 SWI 0 whereas soft device should use TIMER 0 PPI 8, 9, 10 SWI 1

I know that the configuration doesn't change cause linker exit on error cause app_timer already use SWI 0. Did I miss configure the library ?

For my smart card, I use TIMER 1 and PPI 3 Did you know if those resources are used by somethings else ?

[Hung Bui]

@A_Caron: I just tested here again with gzll_sd_resources_gcc.a in gcc and reproduced the issue.

Last time I was tested with Keil (the .lib file). That's why it worked for me.

I just check and gzll_gcc.a and gzll_sd_resources_gcc.a, they seem to be identical !

I will report it as a bug and will get back to you when we have the correct library out. Thanks for pointing out.

In the mean time I guess you can modify the app_timer to use SWI1 (or use app_timer_ble_gzll.c).

gzll_ack_payload - TIMER1.zip

[A_Caron]

Yes I have the same error

/home/[.....]/NordicSDK/nrf51822/Lib/gzll/gcc/libgzll_sd_resources_gcc.a(nrf_notification_manager.o): In function SWI0_IRQHandler': nrf_notification_manager.c:(.text+0xac): multiple definition ofSWI0_IRQHandler' ./Librairies/app_timer.o: /home/[.....]/NordicSDK/nrf51822/Source/app_common/app_timer.c:925: first defined here

[Hung Bui]

@A_Caron: I just updated my answer.

[A_Caron]

Great ! I'll wait for news about it.

What about my other problem ? Every things works perfectly fine, I'm able to send packet to host and it respond to device.

But when I start TIMER1 to access smart card, I'm not longer able to send new packet. They are no error raised by Gazell, nrf_gzll_add_to_tx_fifo() return success but host never receive anything and nrf_gzll_device_tx_success() or nrf_gzll_device_tx_failed() are never call either.

Thank you for your time and interest !

[Hung Bui]

@A_Caron: I'm trying here (with KEIL) and added timer 1 to the SDK 9.0 example and it seems to work fine. I attached the example in the answer above.
What do you do with the timer ? If you only blink an LED would the issue remain ?