TWI recover from timeout

[AmiguelS]

I am using the TWI module in master mode, with sdk 10. I purposely create an error situation, in which the TWI gets stuck and keeps returning NRF_ERROR_BUSY every time I try to initiate a transfer. How may the device recover from this block? I have tried uninit/init the TWI module, with no success.

[Ole Bauck]

Problem is that a busy flag in an internal structure is not set to false when initializing the driver. This has been fixed in SDK 11. Either update to SDK 11 or add this line to nrf_drv_twi_init(..):

m_cb[p_instance->instance_id].transfer_in_progress = false;

[Ole Bauck]

What is the build code of the chip you are using (for example QFACA1)? Could you upload a logic analyzer or oscilloscope capture of the lines right before the twi stops working (when the lines are pulled to ground)?