I have a LS1021atwr Rev2.0 connected with TWR-SER2. I want to use RS485 functionality of TWR-SER2.
But RS485 is connected to LPUART1 pins.
If I enable LPUART in "include/configs/ls1021atwr.h", the console from UART1/USB is gone and I can see it on LPUART1.
J19 and J20 before were shorting 2-3 when uart used and now they are shortening 1-2 when LPUART enabled.
My question is how to configure u-boot so I can have console and I can use LPUART1(/dev/ttyLP0)?
I have enabled ttyLP1 in device tree(&lpuart1) but I don't know if/where it is connected to TWR-SER2 board!?
I use SDK1.9 for u-boot building with sdk2.0 for openwrt rootfs and I boot from SD_CARD only.