error: #20: identifier "NRFX_TIMER0_INST_IDX" is undefined

[namitha K M]

Hi,

I working with NRF52840 DK board, I need to read some potentiometer values from 0 to 10 using ADC with ble_app_uart. I have combined SAADC code and BLE_APP_UART code, while compiling the code I am getting some error as " #20: identifier "NRFX_TIMER0_INST_IDX" is undefined". Please anyone help on this how to solve the error.

Thanks.

[Einar Thorsrud]

Hi,

You typically get such errors if the peripheral you are using (TIMER0) here is not enabled in sdk_config.h. You should check that you have set NRFX_TIMER_ENABLED, NRFX_TIMER0_ENABLED, TIMER_ENABLED and TIMER0_ENABLED to 1 in your sdk_config.h (which of the former or latter two you need depends on which API you are using, but setting all is no harm).

[namitha K M]

Hi,

If I am enabled all the timer also , I am facing same issue. is there any other way to resolve the error.

Thanks

[namitha K M]

Hi,

If I enabled the timer function in sdk_config.h means i am getting various error as attached below

[Einar Thorsrud]

This is a linker warning indicating that these functions has not been compiled. That could either be because you have not added the .c files that implement them to the project so that they are not compiled, or that these functions are stripped out by the preprocessor, typically because of missing configurations in sdk_config.h.

For instance for PPI, the relevant implementations are in integration\nrfx\legacy\nrf_drv_ppi.c and modules\nrfx\drivers\src\nrfx_ppi.c. So you need to add those two files. And you must make sure that PPI_ENABLED is set to 1 in your sdk_config.h.

[namitha K M]

Hi,

Thanks for the reply.

Can you please tell me how to add those two files and also send me the path location, from which place /path I need to add that files, actually i am new to this controller. Please help me.

Thanks

[Einar Thorsrud]

For the path, please see my previous post. For adding files, that that depends on which IDE/toolchain you are using, but is not related specifically to the nRF (these are generic C programming concepts). If you are using Segger Embedded Studio for example, add a file for instance by right clicking on a "folder" under project items (by default on the left side) and select "Add existing file...".

[namitha K M]

Hi,

Can you please send me your previous post link.

Thanks

[Einar Thorsrud]

I was referring to my (then) previous post in this thread. There you see the paths (relative to the SDK root) to nrf_drv_ppi.c and nrfx_ppi.c.