Dan Erickson wrote: > Howdy, > > I am a bit confused on this subject. Lets say a base address for >some odd device is 0x240. Ok.. that is cool, but then suddenly you need to >write to a control register at base address +3. > So... lets say > >static short io = 0x240; > >and then I need to write to the control register, which is at >base address + 3; > > and in some code, they define some macro, like > >#define FOO_BAR (io+3) > >so... when they say +3, does it mean that 0x240 becomes 0x243? > >Thanks for the help > >-Dan Erickson- >-ColdOneKnight@rogers.com- > That is correct Dan. Most times I do something like this: #define CTRLREG 3 #define ANOTHERREG 5 and then do writeb(value, io + CTRLREG); writeb(anothervalue, io + ANOTHERREG); HTH -- Best regards, David Stroupe Keyed-Up Software -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
