Using NRFX_TIMER4_ENABLED in

[AlonBarak]

Hello,

I am updating my application from older SDK 15.0 to use SDK 17.0.

In a newly added file in the SDK: nrfx_nfct.c - there is a definition of:

#define NRFX_NFCT_TIMER_INSTANCE 4 /**< Timer instance used for various workarounds for the NFCT HW issues.*/

However, NRFX_TIMER4_ENABLED is not active in sdk_config (only 0-3 are active). What is the desired action so that my code will compile and will work properly on my nrf52840?

Please see below relevant section from sdk_config.h.

Thanks,

Alon

// <q> TIMER1_ENABLED - Enable TIMER1 instance

#ifndef TIMER1_ENABLED
#define TIMER1_ENABLED 1
#endif

// <q> TIMER2_ENABLED - Enable TIMER2 instance

#ifndef TIMER2_ENABLED
#define TIMER2_ENABLED 1
#endif

// <q> TIMER3_ENABLED - Enable TIMER3 instance

#ifndef TIMER3_ENABLED
#define TIMER3_ENABLED 1
#endif

// <q> TIMER4_ENABLED - Enable TIMER4 instance

#ifndef TIMER4_ENABLED
#define TIMER4_ENABLED 0
#endif

[Simon]

I would recommend you to ignore all the NRFX definitions and use only the legacy definitions. The legacy definitions (non NRFX) will always override the NRFX definitions. I suggest the same with the legacy API, use it instead of the NRFX API. This is the easiest approach and works for all intent and purposes.

Check out these cases where I understand how this works in more details:

• https://devzone.nordicsemi.com/f/nordic-q-a/38149/iar-error-pe020-identifier-nrfx_timer1_inst_idx-is-undefined
• https://devzone.nordicsemi.com/f/nordic-q-a/41707/fails-to-use-nrfx-modules
• https://devzone.nordicsemi.com/support-private/support/253159

Best regards,

Simon

[AlonBarak]

Hi, thanks for the reply.

First of all - OK, I will use the legacy definitions.

Regarding the problem though - the SDK uses NRFX_NFCT_TIMER_INSTANCE 4.

However - timer 4 is not enabled. Should I enable it manually? does it physically exist in nrf52840?

Thanks,

Alon

[Vidar Berg]

Hi,

Yes, I would say the correct way to solve this is to enable TIMER instance 4 in your sdk_config file. But you also could modify the NRFX_NFCT_TIMER_INSTANCE setting if you wish to use a different timer instance. The 52840 has 5.

Regards,

Vidar