Hi,
I'm using the i.MX93 with RS485 on Linux, but the hardware doesn't have a separate gpio for controlling the transceiver's receive enable pin, so the hardware echos anything that is transmitted.
On a Raspberry Pi, the pl011 driver handles this by disabling the uart's receive enable when transmitting and the SER_RS485_RX_DURING_TX flag is not set.
I tried to implement the same for the lpuart, but it looks like lpuart32_tx_empty() returns non-zero whilst there is still data in the fifo.
Any ideas?
Thanks, Phil
