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Altera_Forum
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9 years ago

connecting 4 GPIO pins to DAC using SPI interface

Hi. I am new to altera and am interested in connecting a DAC via the GPIO pins on my development board. the DAC takes a data connection using the spi interface so I am wondering what is the best ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Hi Chris.

Does this Qsys setup make sense (am attaching a zip file of the screenshot since this site reduces automatically the size of the image file)? I hope I got the wires connected correctly.

Also, do you know of any resource/code that I can use to send 16 bit data continuously?

I'll be reading the data streams direction from external memory and I'm afraid of is that the CPU would not be able to send the data at a sufficient rate. I need to send the 16 bit data stream at 1MHz input speed. Does that mean I need a clock that operates at >16 MHZ operating the DAC/SPI (one start bit, one stop bit, and 16 bits each per clock cycle)?

Thanks again!