AnsweredAssumed Answered

UARTs on BF537 stamp

Question asked by feucom on Apr 18, 2012
Latest reply on Apr 20, 2012 by feucom

Hi,

 

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?

 

thanks

 

 

Ralph

Outcomes