error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

RE: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

usmanmehmood55 — Fri, 22 Jan 2021 09:47:52 GMT

Hi. I am having the exact same issue, but my config file has all these enabled

#define NRFX_TWIM_ENABLED 1
#define NRFX_TWI_ENABLED 1
#define TWI_ENABLED 1
#define TWI0_ENABLED 1
#define TWI0_USE_EASY_DMA 1

What could be the issue?

RE: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

Garth@ESS — Sat, 30 Nov 2019 01:14:55 GMT

I had this problem as well.

I solved it by modifying sdk_config.h as follows (find these lines and update the values):

#define NRFX_TWIM_ENABLED 1
#define NRFX_TWI_ENABLED 1
#define TWI_ENABLED 1
#define TWI0_ENABLED 1
#define TWI0_USE_EASY_DMA 1

If you look in SDK 15.2 ...\integration\nrfx\legacy\nrf_drv_twi.h, you will see the following around line 120. In order for NRF_DRV_TWI_INSTANCE_0 to be defined, one of the four #if statements must evaluate to true. In my case it should have been the first one, NRFX_TWIM0_ENABLED.

/**
 * @brief Macro for creating a TWI master driver instance.
 */
#define NRF_DRV_TWI_INSTANCE(id)    NRF_DRV_TWI_INSTANCE_(id)
#define NRF_DRV_TWI_INSTANCE_(id)   NRF_DRV_TWI_INSTANCE_ ## id
#if NRFX_CHECK(NRFX_TWIM0_ENABLED)
    #define NRF_DRV_TWI_INSTANCE_0 \
        { 0, { .twim = NRFX_TWIM_INSTANCE(0) }, true }
#elif NRFX_CHECK(NRFX_TWI0_ENABLED)
    #define NRF_DRV_TWI_INSTANCE_0 \
        { 0, { .twi = NRFX_TWI_INSTANCE(0) }, false }
#endif
#if NRFX_CHECK(NRFX_TWIM1_ENABLED)
    #define NRF_DRV_TWI_INSTANCE_1 \
        { 1, { .twim = NRFX_TWIM_INSTANCE(1) }, true }
#elif NRFX_CHECK(NRFX_TWI1_ENABLED)
    #define NRF_DRV_TWI_INSTANCE_1 \
        { 1, { .twi = NRFX_TWI_INSTANCE(1) }, false }
#endif

I found the #define NRFX_TWIM0_ENABLED in SDK 15.2 ...\integration\nrfx\legacy\apply_old_config.h

#define NRFX_TWIM0_ENABLED (TWI0_ENABLED && TWI0_USE_EASY_DMA)

So, I went into my sdk_config.h and updated those #defines with non-zero values, and voila! Problem solved! 🙂

RE: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

nikhilesh — Fri, 26 Apr 2019 09:17:20 GMT

Hey rolandvagyok,

Please let us know what is it you did with sdk_config.h to get it work :o

RE: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

Rajneesh — Mon, 19 Nov 2018 16:33:22 GMT

Hi Saral

I also faced this issue when I move from SDK-11 to SDK-15. Please take a look on examples\peripheral\twi_sensor example, main.c and sdk_config.h file it will help you a lot.

RE: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

ps_anu — Wed, 14 Nov 2018 09:22:52 GMT

hi....gos ... hope you can help me.. i couldn't understand the above pic

RE: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

ps_anu — Wed, 14 Nov 2018 09:18:39 GMT

i am also having problem related TWI_INSTANCE_0 .. pls help me.. i have merged two examples uart and twi sensor in segger 15.2 version . it showing error like this what to do

see the pic below

RE: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

gos — Wed, 05 Sep 2018 20:19:59 GMT

Fantastic! Solved my problem as well. Thanks for sharing!

RE: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

maiden — Thu, 03 May 2018 03:17:57 GMT

I had the exact same problem, The cause was that NRFX_TWI_ENABLED was set but not TWI_ENABLED.

See here:

RE: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

davidlr — Thu, 26 Apr 2018 17:18:01 GMT

could you share the solution? Thanks! :)

RE: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here

rolandvagyok — Mon, 23 Apr 2018 11:15:00 GMT

Solved the issue, it was with my sdk_config.h