help reading adxl312

[cncmachineguy]

Ok, first my apoligies, you should have gotton 1 hz with the code I posted. NOT 60 Hz. if the LED never turned off, well that is confusing. Maybe a typo somewhere?

On to more important stuff. with your code as posted (pause 250) you should get 2 hz. Is that what you are getting? pause 250 equals 2 Hz with OSC 20? If this is so, then I think you need to have OSC 20 as your define. Heres why I know:

pause uses OSC define to generate delays in software based on the OSC value. So when OSC matches actual pic speed the pauses will be the correct amount of time. 250 mSec on then 250 mSec of is 2 Hz.

So assuming make sure your DEFINE OSC is correct. Of course that doesn't address the fact that you say you get junk from serout when OSC is 20.

[cluster]

sorry i messed up the test results, this is the result i got, tested it twice

test program
test:
high porta.0
pause 500
low porta.0
pause 500
goto test

result at osc 48
led on off duration is exactly 1 second

result at osc 20
led on off duration is twice

so i think define osc is correct.

i found this code(in document section) from sparkfun:http://www.sparkfun.com/products/9814
it is for adxl345 and uses spi but its in c and for atmega..

[cncmachineguy]

Well I am sorry it wasn't as simple as the clock being wrong, But now you know how to test it. I actually do this on all my programs before going any further just to verify the clock/osc and me are all at the same speed.

[Darrel Taylor]

The SHIFTOUT command sends 8-bits unless otherwise specified.
To send a 16-bit constant, you'll need to specify the number of bits.

shiftout data_out, CLOCK, 2, [%0011000100100000\16]