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spi2.0: Port 2: Possible RX FIFO overrun

Question asked by Surendra Dhobale on Jun 9, 2017
Latest reply on Jun 27, 2017 by Surendra Dhobale


      I have successfully interfaced the max14830 chip with imx6ul over spi. I am able to transreceiver the data on one of the RS485 ( UART/ ttyMAX2 ) port. With Loopback everything works fine.

Now when I am trying to send the data ( like 200 bytes or more ) from other device to /dev/ttyMAX2 port ( UART expander port). Getting the RX overrun error and loss the few data.

I have tried with different baud rate like 9600 or 115200 bps.Still same issue.


What could be the causes for the RX overrun ? How to be resolve ?