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OMAPL138: UART test

Part Number: OMAPL138

Tool/software: Code Composer Studio

I wanted to test the UART of OMAPL138, for this i have initialised all the registers as per my need, brought hl340 cable, downloaded corresponding driver. Also putty i downloaded and its detecting the connection. But the problem is terminal which is a black screen that opens doesnt shoes anything. What should i do ?