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Using RS-485 on fsl-yocto-4.1.15_1.1.0

Question asked by charles huang on Sep 21, 2016
Latest reply on Sep 26, 2016 by igorpadykov

Hi
On fsl-yocto-4.1.15_1.1.0
We found that uart driver of fsl-yocto-4.1.15_1.1.0 support RS-485,and we used ioctl to use RS-485 to receive and send data to another device,but it only can receive the first data ,the second time we want to re-transmit and get no response

 

I print USR2 register ,the first time I receice data the USR2 is 4008,the second time I receive date the USR2 is 5008
According to imx6 DRM ,it means IDLE condition has been detected.

 

Please help  to solve this issue

 

Thanks

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