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FPGA- Digital Frequency Control to Run Variable Frequency Driver for Acousto-optic Deflectors

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I am currently using an USB-7856 Multifunction RIO, and I am trying to generate a digital signal to send to my Variable Frequency Driver by AAOptoelectronics that will change the angle on my acousto-optic deflector, in order to generate a laser scan pattern. I have a NI SCB-68 HSDIO shielded 68 pin connector block hooked up to the FPGA, which is hooked up to the frequency driver via DB44HD connector, with 15 bit control. I have started a program using the sine wave generator on my fpga, however, I am unsure how I would send that to my board to then send on to the driver. I have attached my code to this post, and any help would be much appreciated! 


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