I'm confused about UART on my stamp board. the BF537 has tow UARTs. But in root:/sys/devices/platform> is only one "bfin-uart.0". I assume its uart0.
In root:/dev> I have:
crw-rw---- 1 root root 5, 0 Jan 22 06:22 tty
crw-rw---- 1 root root 204, 64 Jan 22 06:22 ttyBF0
-rw-r--r-- 1 root root 5 Jan 22 06:20 ttyS0
echo on tty works but not on ttyBF0 and ttyS0. However I would expect to have ttyBF0 and ttyBF1.
In additional ttyS0 is no character device like the other one. in the Kernel settings I couldn't find any hind to enable the second uart.
I guess there is something wrong in my understanding, but what?
What should I do to have two UARTs?
I checked "http://docs.blackfin.uclinux.org/doku.php?id=uclinux-dist:serial_programming&s=stty", but ....
could you please tell me whats wrong?