lwew96 Posted June 14, 2019 Share Posted June 14, 2019 I am newbie. I want to use DAC spartan3e to generate sine wave at 100 kHz. But i don't know the function of pin SPI_MISO. So, Do i really need use pin SPI_MISO? Does everybody give some note when generating wave by DAC spartan3e. TKs all Link to comment Share on other sites More sharing options...
xc6lx45 Posted June 14, 2019 Share Posted June 14, 2019 You're trying to drive an external SPI DAC, right? SPI_MISO is to get information back from the external component to the FPGA. So in theory, no you don't strictly need it. It's also possible without an external DAC, using a resistor and capacitor instead as lowpass. Here is one example including sine wave generation that allows rail-to-rail output (that is, 0..3.3 V). It's probably the fastest way but this is not exactly "newbie" territory. In other words, if this happens to be a course project, double-check that this approach is legit. Otherwise, better be prepared to explain how it works link/code Link to comment Share on other sites More sharing options...
lwew96 Posted June 14, 2019 Author Share Posted June 14, 2019 @xc6lx45 oh tks. But my aim is creating BPSK Link to comment Share on other sites More sharing options...
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lwew96
I am newbie. I want to use DAC spartan3e to generate sine wave at 100 kHz.
But i don't know the function of pin SPI_MISO. So, Do i really need use pin SPI_MISO?
Does everybody give some note when generating wave by DAC spartan3e.
TKs all
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