[En-Nut-Discussion] UART1 on ethernut3

[Ole Reinhardt]

Hi!

>     // UART1
>     assign P22  = ( rsc_reg[7] & rsc_reg[6]) ? CRD : 1'bz;
>     assign P22  = (~rsc_reg[7] & rsc_reg[6]) ? CDSR : 1'bz;
>     assign CTD  = ( rsc_reg[7] & rsc_reg[6]) ? P21 : 1'bz;
>     //assign CDTR_buf = (~rsc_reg[7] & rsc_reg[6]) ? P21 : 1'bz;

You can do so simply using Software. If the UART1 port is enabled, it
will use the DTR line for the transmitter and the DSR line for the
receiver. So you can access both UARTs on the sub-d9 connector.

This is the command you need to enable the secondary UART:

outb(NPL_RSCR, inb(NPL_RSCR) | NPL_RSUS0E | NPL_RSUS1E);

Now you can 

NutRegisterDevice(&DEV_UART1, 0, 0);

and open it as usual.

See also: http://www.ethernut.de/en/hardware/enut3/memory.html

Regards,

Ole Reinhardt 

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