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rs485 on imx28

Question asked by Jelle Sels on Apr 28, 2014
Latest reply on May 16, 2014 by igorpadykov

I' m trying to get a rs485 bus working on a custom imx28 design. The problem that I' m facing is where to release the rs-485 bus in the linux code. How do I know that the uart is done sending its data? Is there a specific functions that gets called?

I don't find any function in mxs-auart.c which gets called after the device is done writing when using the 'screen' command in usermode.

Is there a possibility to set the irq, to trigger when the tx-buffer is empty?