[En-Nut-Discussion] SAM7S128 UART0 / UART1 problem

[Harald Kipp]

On 03.07.2010 13:12, SZABO Tamas wrote:

> Actually, of course I changed DEV_DEBUG_NAME to DEV_UART0 as well, just forgot to mention.

Your code sample uses
freopen(DEV_DEBUG_NAME, "w", stdout);
:-)


> Anyway I made my own "board". I connected only a few pins (powers, crystal, PLL passives, an IO port for a LED, and the 3 serial ports).

You may at least check the results of NutRegisterDevice and freopen.

> So, should my example work with serial0 if I only change to DEV_UART0 and DEV_UART0_NAME and nothing else?

Yes, in general it should. I'm not fully sure about SAM7S support.
Neither I wasn't involved in this port nor did I ever run Nut/OS on this
CPU. May be someone else is able to give a status. I looked into Nut/OS
4.9.9 and this version should work.

If all fails, you may copy usartat91.c, usart0at91.c and usart1at91.c
from arch/arm/dev/ to you application directory and add the latter two
to you Makefile. Then use DEV_DEBUG for stdout and

 FILE * fp = fopen(DEV_UART0_NAME, "r+");
 fprintf(fp, "Yes we can\n");

to test your other serial port. You may then add printf calls to the
UART code to check what it is doing.

Regards,

Harald