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DAC Functionality

A project log for General Purpose Software Defined Transmitter

GPSDTx is a board capable of transmitting a signal up to a few MHz (1-3?) wide anywhere between 100MHz and 2.2GHz

Brett KillionBrett Killion 12/08/2016 at 16:530 Comments

I've been playing around with the GPSDTx board for a few days now and I've gotten the interface with the DAC sorted out pretty well. It's a pretty simple interface but I didn't implement it quite as efficiently as I could have so that will be something to address in the next board revision.

I still have lots to do to get a more smoothly running product, not the least of which is getting the SysTick turned off. The auto-generated STM32Cube startup code turned that on and it's also included a bunch of extraneous libraries and things that I don't need or want yet depend on the SysTick so, right now, I get glitches every 1mS when updating the DAC due to the SysTick interrupt firing and doing what ever it does.

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