NRF/NRFX TWI manager configurations & NRFX_TWI0_INST_IDX undeclared

RE: NRF/NRFX TWI manager configurations & NRFX_TWI0_INST_IDX undeclared

Sherief — Sun, 26 Jul 2020 09:04:38 GMT

The problem is that somewhere in this header include maze NRFX is forcing the include of apply_old_config.h, which proceeds to #undef all your TWI #defines. In my case I added -DAPPLY_OLD_CONFIG_H__ to my build flags, which causes the header guard checks in apply_old_config.h to fail thinking that the header has already been included - same thing as never including the header at all. Other options are to rip the header out of the SDK but I wanted to keep my code buildable with a stock install of the SDK.

RE: NRF/NRFX TWI manager configurations & NRFX_TWI0_INST_IDX undeclared

Simon — Mon, 29 Apr 2019 09:29:37 GMT

Check out this answer, where I tried to explain the relation between the nrfx and the legacy API. If you are still confused, please explain what you don't understand and I will try to help.

Best regards,

Simon

RE: NRF/NRFX TWI manager configurations & NRFX_TWI0_INST_IDX undeclared

nikhilesh — Fri, 26 Apr 2019 11:13:29 GMT

Hey Simon. Could you please help me?

RE: NRF/NRFX TWI manager configurations & NRFX_TWI0_INST_IDX undeclared

nikhilesh — Fri, 26 Apr 2019 09:08:13 GMT

Hey birdmachine,

So you resolved the error?

I keep getting this error please help me

Error[Pe020]: identifier "NRFX_TWIM0_INST_IDX" is undefined

in main.c

RE: NRF/NRFX TWI manager configurations & NRFX_TWI0_INST_IDX undeclared

Simon — Fri, 31 Aug 2018 11:56:07 GMT

Glad to hear that you finally made it work. Please ask if you enter any more problems.

Cheers, Simon

RE: NRF/NRFX TWI manager configurations & NRFX_TWI0_INST_IDX undeclared

birdmachine — Thu, 30 Aug 2018 06:16:48 GMT

UPDATE
I get TRUE finally when I do the opposite, actually. I took another shot at purging every non-nrfx mention of TWI from the sdk_config and now it gives me both true and compiles as intended! I must have left something behind last I tried this. THANK YA'LL for the help :D !!

Gave it a shot with
TWI0_ENABLED 1
TWI0_USE_EASY_DMA 1
with the nrfx_twi definitions both present and completely striped from the sdk_config. Seems like it simply overwrites if it's already present/defined, but at this point I'm trying everything. Neither method fixes this unfortunately.

so nrfx_twi.c is definitely being brought in and compiled; Added a few tests in here as well to see what's going on...

#if NRFX_CHECK(NRFX_TWI_ENABLED)
    #error "NRFX_TWI_ENABLED TRUE"
#else
    #error "NRFX_TWI_ENABLED FALSE"
#endif

With the above I'm getting NRFX_TWI_ENABLED FALSE on compile.
Also tried massaging that into

#if NRFX_TWI_ENABLED==0
    #error "NRFX_TWI_ENABLED FALSE"
#else
    #error "NRFX_TWI_ENABLED TRUE"
#endif

And still, FALSE.

The result's the same
No matter what I change, add, or remove, NRFX_TWI_ENABLED is 0

RE: NRF/NRFX TWI manager configurations & NRFX_TWI0_INST_IDX undeclared

laserdan — Wed, 29 Aug 2018 00:59:40 GMT

Update: I guess something else in the sdk_config file is forcing apply_old_config, so I have to go back to nrf_drv_ functions--but I am back to getting "undefined reference to 'nrfx_twi_tx" and "nrfx_twi_rx". In sdk_config.h iI have only set TWI_ENABLED and NRFX_TWI_ENABLED since that was in the logical statement and it still failed. Then I put in a print line to see if TWI_PRESENT was defined and it was. So I'm confused as to why this redefinition in is not executing and the nrfx_twi_tx function is not defined. Way down in nrfx_twi.h where this function is defined I ran the same NRFX_CHECK error check and it passed. I can muck with nrfx_twi.h and get errors so I know it is being called by nrf_drv_twi.h and TWI_PRESENT is defined. So why are they functions being defined?

Looks like my nrfx_twi.c function is not being compiled--I can muck with it but it doesn't do anything. I need to figure out how to modify the makefile to link it.

Update: Solved. For some reason the Keil project was able to find and link nrfx_twi.c and nrf_drv_twi.c but I had to manually add them to the makefile for gcc.

RE: NRF/NRFX TWI manager configurations & NRFX_TWI0_INST_IDX undeclared

laserdan — Wed, 29 Aug 2018 00:42:51 GMT

I have the same issue. I'm trying to use the "nrfx_twim.h" library and functions in the ble_app_hrs example. I am getting the same error. I have NRFX_TWIM_ENABLED = 1, NRFX_TWIM0_ENABLED = 1, THen I set, TWI_ENABLED = 1 and TWI0_ENABLED = 1. I can't figure out why if I am using the new libraries and functions I should need the apply_old_config.h file. I also can't figure out why that section of code in nrfx_twim.h is failing. I added debuggers in main.c and the output confirms the asserted definitions above are correct. What am I missing? BTW, I am trying to compile with GCC. I switched the functions from nrf_drv to nrfx_ because it won't compile in GCC, although it did compile in Keil with nrf_drv_

RE: NRF/NRFX TWI manager configurations & NRFX_TWI0_INST_IDX undeclared

Simon — Tue, 28 Aug 2018 14:54:24 GMT

Have you tried to set TWI0_ENABLED and TWI_ENABLED to 1 (not NRFX_TWI..), I think that will solve your problem.

The reason for this is that NRFX_TWI0_ENABLED is defined as follows (in the file apply_old_config.h):

#undef NRFX_TWI0_ENABLED
#define NRFX_TWI0_ENABLED   (TWI0_ENABLED && !TWI0_USE_EASY_DMA)

Best regards, Simon