TWI Init/Uninit Driver Bug

RE: TWI Init/Uninit Driver Bug

Kenneth — Wed, 05 Oct 2016 14:15:22 GMT

Hi,

The intended procedure to start any I/O peripheral is to: CONFIGURE->ENABLE->START And in the reverse order to stop any I/O peripheral: STOP(wait for event)->DISABLE(->RECONFIGURE)

All HW modules is based on this principle.

If the I/O peripheral use a shared reseource with another peripheral also used by the application, then you need to carefully check all configuration settings when it is failing, in case you depend on a default value that might have changed.

RE: TWI Init/Uninit Driver Bug

Carl — Tue, 04 Oct 2016 16:04:09 GMT

I ran into kind of the same problem with SDK v11 (nRF52).

In the beginning I initialize and enable TWI, tx and rx works fine. After deinitializing and reinitializing (to change the frequency), tx does not work anymore.

It's stuck in function twi_tx_start_transfer(...) of driver nrf_drv_twi.c in the loop while(twi_transfer(...)) at line 450.

RE: TWI Init/Uninit Driver Bug

tesc — Mon, 01 Feb 2016 12:45:42 GMT

Hi,

I do not know if there is still a similar issue in the current SDK, but from what I can see the TWI driver is completely rewritten for SDK 11.