TWI issue ?

[Fabien Comte]

Hello,

I have a capricious component on my TWI bus, and sometimes my nRF52 do an infinite loop in file nrf_drv_twi.c

in this loop while (!nrf_twim_event_check(p_twim, evt_to_wait)) { ... }

Why I have no done and no error ? Could it be possible to add a timeout as protection.

[Ole Bauck]

Sounds strange. Have you captured the TWI lines to see if the STOP/SUSPENDED condition happens? Do the code work if you use handler? I assume you have not modified the driver or are touching any of the NRF_TWIM or NRF_TWI registers?

[Fabien Comte]

Migration to bitbanging fixed my issue.

I guess that I was touched by the errata (nRF52 is in rev C)

[Fabien Comte]

Thank you for your help.

[Ole Bauck]

What errata? Bitbanging seems like a bad solution, the hardware peripheral should work.

[Fabien Comte]

Symptoms are very similar to [30] TWIS "In TX (READ command), SCL and SDA are pulled low and further communication is blocked."