multiplier- accumulator by use fixed pint representation

[mangood]

hi

i am looking to bulit  multiplier- accumulator  by use fixed point representation in labview

but i did not find a good guide and the blocks of fixed point in menu is small and  its not enugh

can any one add asimple implementation like this example

x: 8 bit sign

y:9 bit sighn with 3  for fraction p

z=x*y

 z will 18 bit real part and 9 bit fraction 

my ver labview 2011 or less

thank in advace

best regards

[Haagen-Dazs]

Hi mangood,

I may have misunderstood your bit assignment but for the example below all you need to do is create two fixed point numbers and wire them into the multiply VI. The result from that should be another fixed point value with the correct bit widths. The reason I feel that I may not understand the bit assignment listed below is because my result did not have an 18 bit real part and 9 bit fractional part. To change a numeric to fixed point, right click the numeric and go to Representation. Once the value is a fixed point value, right click and go to Properties to change bit widths.

[mangood]

thank for replay
but where the example that you talk about?!!

[Haagen-Dazs · Accepted solution]

I apologize. I made a simple example and actually attached it this time. Follow the steps in my previous post to adjust the bit widths of X and Y. You can use Fixed Point values as inputs to most of the basic math functions and you are not limited to what is in the fixed point palette.

[mangood]

 thank you dear  Haagen

it work 

 take  this from me