On Mon, 21 Nov 2011, thoff88 wrote:
> I am fairly new to the ts7250 and I'm trying to control the DIO pins.
> When I toggle the pins in a for loop nothing happens unless there is a
> printf() statement within the loop. I am using rtai functions so I can
> use the real time timer between the loop iterations, yet the pins still
> only toggle when there is a printf() statement in the loop.
>
> If anyone has suggestions to what may be causing this it would be very
> appreciated.
Without code it's like being mystic meg :-)
But probably because you haven't declared your pointers as volatile.
Or not using the correct options in mmap? e.g.
volatile unsigned char * ptr = mmap(0,getpagesize(),PROT_READ|PROT_WRITE, \
MAP_SHARED,fd,address)
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/ts-7000/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|