Use TWI in blocking mode

RE: Use TWI in blocking mode

Øyvind — Mon, 04 Nov 2019 21:11:08 GMT

Hi atlesilgjerd,
Can you please enter your question in a new support ticket?

Thank you!

Kind regards,
Øyvind

RE: Use TWI in blocking mode

atlesilgjerd — Wed, 23 Oct 2019 07:12:36 GMT

It seemes I have this problem too... SPI event comes when I step through debugging. But when I run without breakpoints in the code, it hangs waiting for the event.

while(!NRF_SPI1->EVENTS_READY);

It seems to be the same problem with SPI0. I am running on nRF52840 and using Segger Jlink lite.

best regards,

Atle

RE: Use TWI in blocking mode

Øyvind — Wed, 05 Jun 2019 09:20:54 GMT

Hello Ran,

Can you please provide more information? Have you verified your timing with the TWI device? Since it works in debug and not when running, it sounds like a timing issue.

Kind regards,
Øyvind

RE: Use TWI in blocking mode

ran — Sun, 02 Jun 2019 21:12:29 GMT

Thanks,

That is my impl. ( NULL for evt_handler ) . What else might be the reason for different bus transaction between step-by-step and "running" ?

It seems like "blocking" does not really works , I will upload screen shots tomorrow if it helps

RE: Use TWI in blocking mode

BinderT — Sun, 02 Jun 2019 16:07:52 GMT

If the event_handler parameter is passed as NULL in nrf_drv_twi_init(). TWI will be put in blocking mode.
From the SDK

 * @param[in] event_handler   Event handler provided by the user. If NULL, blocking mode is enabled.

ret_code_t nrf_drv_twi_init(nrf_drv_twi_t const *        p_instance,
                            nrf_drv_twi_config_t const * p_config,
                            nrf_drv_twi_evt_handler_t    event_handler,
                            void *                       p_context);