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Unread 22-01-2012, 15:15
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Re: inverse sine FPGA

Quote:
Originally Posted by Betty Boop View Post
I’m having a hard time utilizing the attached VI in mapping the input and output to their true values (i.e. -1 to 1 for input, -pi/2 to pi/2 for output).
I'll answer your lookup table question, even though I too wonder why you are doing this.

For indices from 0 to 1022, populate your table with arcsine(index/511-1).

To use the table to find arcsine(X) (where -1<=X<=+1), calculate the index as 511*(X+1) and look up the arcsine for that index in the table.

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