I have TXB0104 for voltage level translation and MAX485, but i don't
know how to generate the enable signal for MAX485.
It seems that the expansion header has only four pins for UART.
UART2_RX, TX, RTS, CTS.
i googled a lot but didn't find any documents or a device driver for
Should i wirte my own RS485 device driver? Someone said that i could
use 'inverted TxD' as the enable signal for MAX485, but i'm not so
please help me.