Blinky_freeRTOS linker issues

[gian]

Hi, I am working with the example Blinky_freertos present on the SDK_13.0.0_04a0bfd. I have built the example w/o issues in compilation but I have the following problems with the linker:

1. undefined reference to `nrf_drv_clock_lfclk_request'

2. undefined reference to `nrf_drv_clock_init'

All the necessary files and folders seem to be included in the makefile(which provided with the example). I guess there is something wrong with the configuration but I haven't found anything in the documentation related to this.

I am using arm-none-eabi-gcc 5.4.1.

[gian]

ok this is close, sdk_config.h wasn't the right one in my structure.

[Susheel Nuguru]

thanks for coming back and updating us. I think it was the NRF_CLOCK_ENABLED macro that needs to be set to 1.

[grzegorz]

In SDK 15.0.0 the function nrf_drv_clock_lfclk_request() is defined in integration/nrfx/legacy/nrf_drv_clock.c. This file doesn't include sdk_config.h in any way. Therefore CLOCK_ENABLED is seen as undefined and nrf_drv_clock_lfclk_request() is not compiled. So how can I enable the clock library in SDK 15.0.0? Or maybe the code in external/freertos/portable/CMSIS/nrf52/port_cmsis_systick.c should be ported to new nrfx drivers?

[Sigurd]

grzegorz said:

In SDK 15.0.0 the function nrf_drv_clock_lfclk_request() is defined in integration/nrfx/legacy/nrf_drv_clock.c. This file doesn't include sdk_config.h in any way.

That is not entirely correct. nrf_drv_clock.c includes nrf_drv_clock.h -> nrfx_clock.h -> nrfx.h -> nrfx_config.h -> sdk_config.h

[grzegorz]

I see there are several nrfx_config.h files in the SDK. Only the one from "integration" folder includes sdk_config.h. I used the one from "templates" and it doesn't include sdk_config.h. Does that mean that the file from "templates" is for new nfrx projects and from "integration" for legacy ones?

[Sigurd]

Yes, that is correct. The files in the integration folder performs required translation of the former drivers API and configuration settings to their new implementations.