Linking MPU6050 sensor with BLE UART

[Sunil vignesh]

Hi, I am trying to interface MPU^)%) sensor with NRF52832. with help of BLE UART. i will get the resultant data on BLE APP. but here i got some error is this the linking error or ?

[AndreasF]

Hi Sunil.

Have you enabled NRFX_TWI_ENABLED in sdk_config.h?

Like this:

// <e> NRFX_TWI_ENABLED - nrfx_twi - TWI peripheral driver
//==========================================================
#ifndef NRFX_TWI_ENABLED
#define NRFX_TWI_ENABLED 1
#endif

- Andreas

[Sunil vignesh]

Hi Andreas

I have enabled that one

/ <e> NRFX_TWI_ENABLED - nrfx_twi - TWI peripheral driver
//==========================================================
#ifndef NRFX_TWI_ENABLED
#define NRFX_TWI_ENABLED 1
#endif
// <q> NRFX_TWI0_ENABLED  - Enable TWI0 instance
 

#ifndef NRFX_TWI0_ENABLED
#define NRFX_TWI0_ENABLED 0
#endif

// <q> NRFX_TWI1_ENABLED  - Enable TWI1 instance
 

#ifndef NRFX_TWI1_ENABLED
#define NRFX_TWI1_ENABLED 0
#endif

// <e> TWI_ENABLED - nrf_drv_twi - TWI/TWIM peripheral driver - legacy layer
//==========================================================
#ifndef TWI_ENABLED
#define TWI_ENABLED 1
#endif
// <o> TWI_DEFAULT_CONFIG_FREQUENCY  - Frequency
 
// <26738688=> 100k
// <67108864=> 250k
// <104857600=> 400k

[AndreasF]

Hi.

Try to also enable NRFX_TWI0_ENABLED

Like this:

#ifndef NRFX_TWI0_ENABLED
#define NRFX_TWI0_ENABLED 1
#endif

- Andreas

[awneil]

how to properly post source code:

then it will look as in AndreasF's posts

[Sunil vignesh]

Hi,

even though that I enabled the NRFX_TWI0_ENABLED as 1, errors are coming.

[AndreasF]

Hi.

There appears to be an overwrite of the config in sdk_config.h by the file apply_old_config.h.

If you have the following config, it should work:

// <e> NRFX_TWI_ENABLED - nrfx_twi - TWI peripheral driver
//==========================================================
#ifndef NRFX_TWI_ENABLED
#define NRFX_TWI_ENABLED 1
#endif


// <q> NRFX_TWI0_ENABLED  - Enable TWI0 instance

#ifndef NRFX_TWI0_ENABLED
#define NRFX_TWI0_ENABLED 1
#endif


// <e> TWI_ENABLED - nrf_drv_twi - TWI/TWIM peripheral driver - legacy layer
//==========================================================
#ifndef TWI_ENABLED
#define TWI_ENABLED 1


// <e> TWI0_ENABLED - Enable TWI0 instance
//==========================================================
#ifndef TWI0_ENABLED
#define TWI0_ENABLED 1

apply_old_config.h overwrites the NRFX_TWI_... defines, but it will still use the new nrfx drivers.

Hope this helps.

- Andreas

[Sunil vignesh]

As you said

in apply_old_config.h

// TWI
#define TWI_ONLY      ( defined(TWI_PRESENT) && !defined(TWIM_PRESENT))
#define TWIM_ONLY     (!defined(TWI_PRESENT) &&  defined(TWIM_PRESENT))
#define TWI_AND_TWIM  ( defined(TWI_PRESENT) &&  defined(TWIM_PRESENT))

#if defined(TWI_ENABLED)

#undef NRFX_TWI_ENABLED
#define NRFX_TWI_ENABLED   (TWI_ENABLED && (NRFX_TWI0_ENABLED  || NRFX_TWI1_ENABLED))
#undef NRFX_TWIM_ENABLED
#define NRFX_TWIM_ENABLED  (TWI_ENABLED && (NRFX_TWIM0_ENABLED || NRFX_TWIM1_ENABLED))

#if defined(TWI_PRESENT) && !defined(TWIM_PRESENT)

#undef NRFX_TWI0_ENABLED
#define NRFX_TWI0_ENABLED   TWI0_ENABLED
#undef NRFX_TWIM0_ENABLED
#define NRFX_TWIM0_ENABLED  0

#undef NRFX_TWI1_ENABLED
#define NRFX_TWI1_ENABLED   TWI1_ENABLED
#undef NRFX_TWIM1_ENABLED
#define NRFX_TWIM1_ENABLED  0

#elif !defined(TWI_PRESENT) && defined(TWIM_PRESENT)

#undef NRFX_TWI0_ENABLED
#define NRFX_TWI0_ENABLED   0
#undef NRFX_TWIM0_ENABLED
#define NRFX_TWIM0_ENABLED  TWI0_ENABLED

#undef NRFX_TWI1_ENABLED
#define NRFX_TWI1_ENABLED   0
#undef NRFX_TWIM1_ENABLED
#define NRFX_TWIM1_ENABLED  TWI1_ENABLED