Accelerometer

Commander_Bob

In the demo code for the· Hitachi H48C TriAxis Accelerometer Module does any one know what %11\2 means? I think \2 means 2 bits but what is %11? I am trying to use the accelerometer and I am writing the code in C so I need to know what this means. Does it have a hexadecimal equivalent that could be sent to the chip?
Thanks

Brian Carpenter

just my guess but % means binary value. Would it be 3?

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It's Only A Stupid Question If You Have Not Googled It First!!

Commander_Bob

11 in binary is 3. That would make more sense because %11 is only 2 bits so \2 makes sense too. Can anyone confirm this?

Graham Stabler

I've looked through the code and have not been able to find %11\2 anywhere?

Are you sure you didn't just lean on the keyboard? The only use for \ I can find is for abort traps.

Graham

Commander_Bob

Here is the section of code
Get_H48C:
LOW CS
SHIFTOUT Dio, Clk, MSBFIRST, [noparse][[/noparse]%11\2, VRef\3] ' select vref register
SHIFTIN Dio, Clk, MSBPOST, [noparse][[/noparse]rvCount\13] ' read ref voltage counts
HIGH CS
PAUSE 1
LOW CS
SHIFTOUT Dio, Clk, MSBFIRST, [noparse][[/noparse]%11\2, axis\3] ' select axis
SHIFTIN Dio, Clk, MSBPOST, [noparse][[/noparse]axCount\13] ' read axis voltage counts
HIGH CS
RETURN

Graham Stabler

I had assumed you were refering to the spin code:

http://forums.parallax.com/showthread.php?p=605387

Given that this is the propeller forum not the basic stamp forum.

Graham

Post Edited (Graham Stabler) : 6/27/2007 12:16:00 AM GMT

Mike Green

Yes, the notation "%11\2" is PBasic, not Spin.· In PBasic, in the SHIFTOUT (and similar) statement, the "%11" is indeed binary and the value is 3.· The "\2" is a bit count for the SHIFTOUT (look in the PBasic manual under SHIFTOUT and SHIFTIN·for details).