[En-Nut-Discussion] Interfacing a memory mapped (Oxford Quad UART) device to an EtherNut

[Harald Kipp]

Douglas,

I'd suggest to write a simple program first (no Nut/OS!)
and use outb and inb statements to access the hardware.

1. Initialize QUART registers
2. Try to output one character
3. Test interrupts

After this is working fine, you should be ready to modify
uartavr.c. Btw. I recommend to use a different file. Do not
intend to make uartavr.c working with both devices, on-chip
UART and external QUAD.


Harald