I am developing on Unmatched board, and previously microUSB can be used as serial port for debugging. Unfortunately, microUSB port was broken by accidently, then there is no way for debugging via serial port.
According to hifive-unmatched-schematics-v3.pdf, there exists UART0_RX and UART0_TX at Jumper 8, and UART0 in Jumper 8 is connected to FTDI FT2232. So I believed UART0 in jumper 8 can be used as HW serial port, in this case, I connected UART0_RX and UART0_TX to serial port to my development machine. However, characters received in remote development machine are chaos.
Has anyone tried UART0_RX and UART0_TX jumpers in jumper 8? Is there any hardware rework or software settings required to make they work?