Hello Champs,
Customer designed his own board according to IWR1443BOOST. He removed TM4C, connected XDS110 to JTAG, used CP2104 to convert UART to USB. The PC shows 3 UARTs correctly. Customer can use COM8 to flash code. But he can't use COM3 and COM4 to open below visualizer.
He can open the visualizer on IWR1443BOOST. 

Thanks
Regards,
Shine