Hi David,
Ignore what I wrote above about FXP
You might be treading on
dangerous ground with your fpga code, both old and new. You are using
the modules in what is known as "calibrated" calibration mode i.e.
fixed point math. Your fpga square wave generation is using integer
math which is normally used when the modules are operating in "raw"
calibration mode. To change the calibration mode you need to right
click on the module and select the mode youwish to use. I do not
suggest that you do this.
What you NEED to do to ensure
correct operation of your fpga vi is to make sure that you are using integer and then converting to a FXP using the
correct encoding ( whether it is signed, word length, and integer
length). In your case the 9263 requires a signed, 20bit word length, 5
bit integer length.
To convert from a I32 to a FXP of the correct type you need to transform the I32 number to a boolean array then convert the boolean array to a number, right click the number output node and select the numeric node properties output configuration tab then uncheck the adapt to source button and set the properties to signed, 20bit word lenght, 5 bit integer length, this will produce a FXP in the range -16.0000 to +16.0000 with a delta of 3.0518e-5.
A 10.0000 FXP as a 20bit word, 5 bit integer is represented by a I32 value of 327680.
As for
your new fpga code, I am not sure why you have used a sequence
structure your reading of 18 channels on the 9205 will take 144
microseconds, and each write of two channels on the 9263 will take 5
microseconds. I have not worked out how long the square wave
generation will take.
I do not understand your most recent question.
>>"I have attached a screen shot of my pwm_out.vi, if
I remove the bottom read/write control, or if I don't at all use any of
the analog inputs, it runs fine.
>>But as soon as I add the analog
inputs it fails...".
Have you created a new bitstream from your fpga_new.vi and referenced it in your pwm_out_new.vi on the RT?
It
is hard to second guess what you are showing in the screen shots. If
the project is not too big then perhaps you could post it here.
As
mentioned earlier, by JMoto, software versions help as well. Check in
MAX what you have on your PC and also on the cRIO 9002 to make sure
that there is no mismatch.
Cheers
Stephen
