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A comment on How We Turned 8 Popular STM32 Boards into Powerful Logic Analyzers. Parent comment

Re:How We Turned 8 Popular STM32 Boards into Powerful Logic ... by snovv_crash on Thursday March 23, 2017 @05:33PM (#13944554)
Maybe not capture, but you can write to the pins at least that quickly. I've seen projects that use the gpio of a raspberry pi to drive an FM transmitter at 100MHz.
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Re:How We Turned 8 Popular STM32 Boards into Powerful Logic ... by megous on Friday March 24, 2017 @01:11AM (#13946775)
The project you're thinking about uses internal PLL in the SoC. This has nothing to do with GPIO reading/writing.

http://www.icrobotics.co.uk/wiki/index.php/Turning_the_Raspb...

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Re:How We Turned 8 Popular STM32 Boards into Powerful Logic ... by snovv_crash on Friday March 24, 2017 @04:36AM (#13947501)
Ah, my bad. I was actually thinking afterwards about how they could be doing the frequency shifts and what kind of sampling speed they would need for accurate, small frequency shift adjustments.
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