Forum Discussion

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

Direct access to pins

Hello you all! http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif I&#39;ve just begun playing with Nios Development Kit - Cyclone Edition. I&#39;m using the count binary t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

> Are these steps correct?

yes :-)

> And about step 3, how do I set and reset the pin in C?

Just define a pointer to the &#39;data&#39; register and write the data you want.

If your&#39;re using data cache, you may want to set bit 31 of the address.

unsigned long *p = (unsigned long *) 0xSOMEADDR;

...

for (;;) {*p = 1; *p = 0;}

--Scott