Messages in this thread | | | Subject | Re: [RESEND PATCH v1 6/6] i2c: i2c-stm32f7: Implement I2C recovery mechanism | From | Pierre Yves MORDRET <> | Date | Mon, 19 Mar 2018 09:51:07 +0100 |
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Yes. Recovery mechanism is triggered whenever a busy line is detected. This busy state can be checked by sw when either SDA or SCL is low: a bit is set by Hw for this purpose. On busy state I2C is reconfigured and lines are released the time of recovery.
Regards On 03/17/2018 09:47 PM, Wolfram Sang wrote: > On Mon, Mar 12, 2018 at 11:53:43AM +0100, Pierre-Yves MORDRET wrote: >> Feature prevents I2C lock-ups. Mechanism resets I2C state machine >> and releases SCL/SDA signals but preserves I2C registers. > > Does it release SDA when held down by the slave? Because that is what > the recovery mechanism is for. >
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