[coldfire-gnu-discuss] Sourcery G++ Lite support for m5235evb serial I/F ?

[Kazu Hirata]

Hi Christof,

> is there any support from the Lite version for <stdio.h> functions ( in particular printf(); ) to work via the serial communication interface of the M5235BCC evaluation board from Freescale ?

You need to override "write".

   ssize_t write(int fd, const void *buf, size_t count);

Your version of write should take COUNT characters from BUF.  You can 
ignore FD.  printf uses the function to write to stdout.  You still have to 
write the serial port support yourself.

If you would like printf support just for debugging purposes, you can route 
stdout to gdb's console just by linking your application with -T 
m5235evb-ram-hosted.ld or m5235evb-rom-hosted.ld.  In that case, you do not 
need to override "write".  The default version of "write" knows how to 
print characters at gdb's console.

Hope this helps,

Kazu Hirata