Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

alt_getchar returning wrong value

int main() { int noia = 0; alt_putstr("Proc 2!\n"); /* get the mutex device handle */ alt_mutex_dev* mutex = altera_avalon_mutex_open( "/dev/mutex" ); /* acquire the mutex, setting the v...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

I'd guess that the result range of alt_getchar() is -1 (no char available) and 0..255 for a received byte (it could also return indications of abort and framing errors) - so the return value could well be 'int' not 'char'.

getchar() will pull in a lot of libc code, and may also (by default at least) require that you type <enter> before making any data available.