nios2 terminal output characters format problem

[Altera_Forum]

Hi, 

 I'm trying to debug a nios2 software, and i have problems with my printf outputs :  the characters are displayed in the terminal, but in a weird format..  So i then tried running the simple hello_world example : Instead of getting in the console : "Hello from Nios II!" i get : "H¢³`o;±öow.Æi¥ÕºI'¶" And with some other random printf, i even get the error message : "nios2-terminal: exiting due to ^D on remote" but i didnt send any ctrl-D command...  Anyone can help me with this problem ?  Thanks  edit :  i see that the only way for me to display correct characters is to use alt_putchar function but its not very handy

[Altera_Forum]

Make sure you have enough heap and stack space since they may be colliding. Also try different USB cables or ports, I remember seeing this years ago when I had my USB-Blaster hooked up to the hub inside my monitor and that LCD was spewing out more noise than a hairdryer on the line :)

[Altera_Forum]

Since the smaller system using alt_putchar() instead of printf (which will pull in a LOT of libc stuff) works it does look like a memory space issue. 

(If a real async/rs232 line were involved I'd actually suggest a baud rate problem.)  For debug, you might find it enough to write a 'putstr' function based on alt_putchar(), and a 'putint' one that converts an integer into a local buffer then sends it.  OTOH, you could write a printf that insn't based on stdio snd libc! I've just compiled one I have for nios2 - actually snprintf() - comes out at 1725 bytes + a call to __udivsi3 (for the divide by 10 - which could be coded differently). This version is actually optimised for speed, not size, and supports all the field width stuff but no floating point.