How to Convert a Number to a 10 bit array that will go into an external DAC (AD7533)

[RTom]

Hello,

Here's is my situation.  I am using LABVIEW with to program a uC in the following fashion:

1. Laview computes the values of a sine wave, depending on the loop iteration number. (i.e. generating a sine value at different frequencies).

2. This is scaled between -/+ 1.

3.  I am connecting an array of digital output ports to an external, stand-alone, four quadrant, 10-bit DAC. The part is AD7533, and I hope to use it in the Bipolar configuration.

My question is,  how can I convert the number from the sine wave (or triangal, sqr, etc) into an array of T/F values that I can stream through my DAC and get a sine wave out?

I've tried number to Boolean array with the computed sine value, but it doesn't seem to give me high bits.

Any suggestions greatly apprec.

RTom 

[RavensFan · Accepted solution]

Post what you have done so far.  Are you starting off with a a U16 or I16 bit integer (or larger)?  How are you doing the scaling between +/- 1 and an integer.  It should be just a matter of using the number to boolean array, and then using a subset of the array to reduce it down to 10 boolean elements.  If you are starting with an I16 integer, it may be a matter of taking the element of array corresponding to the sign bit, and the 9 elements corresponding to the least significant bits, than putting them together to make a 10 element array.

[Coq_Rouge]

This is explained in the AD7533 data sheet. But if you still struggle please post some code, and explain more accurate why you struggle.