How to do internal loopback test on UART of P1020

[sourabhdas]

Hi, I am using P1020 RDB. I am using QorIQ-SDK-V1.7 for software development. I want to do internal loopback Test on UART during the Power-On Self Test. Our generic UART driver is not supporting internal loopback. How could I enable the internal loopback for all the UART's? If there is any reference code please share it.

[alexander_yakov]

To enable internal loopback please set "LOOP" bit is the DUART_UMCRn register.

Please see P1020 Reference Manual, Section 11.3.10 for details

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