"Help needed" Noise level app
 

Hy
I just want a easy small prog to read out the noise level on one frequenzy. (One Job one Tool)
I found some source here: http://www.mjmwired.net/kernel/Docum...nux/si4713.txt

I just did some changes:
http://pastebin.com/9DquJKy1
(pretty dirty)

and pointed the compiler to this si4713.h: http://pastebin.com/ypVe631P

Compiles fine.
But when trying to do:
rval = ioctl(fd, SI4713_IOC_MEASURE_RNL, &rnl);
I get "invalid argument" :(

thx to guy at irc for helping!

edit:updated post