[HN Gopher] Software defined USB port (Raspberry Pi pico RP2040)
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       Software defined USB port (Raspberry Pi pico RP2040)
        
       Author : childintime
       Score  : 28 points
       Date   : 2022-02-15 20:37 UTC (2 hours ago)
        
 (HTM) web link (github.com)
 (TXT) w3m dump (github.com)
        
       | tkanarsky wrote:
       | That's freaking awesome. For those unaware, the RP2040
       | microcontroller has several Programmable IO (PIO) cores, which
       | are essentially standalone state machines that read/write
       | directly from memory to the GPIO pins. Unlike bitbanging the pins
       | with the CPU, you can implement much more timing-sensitive
       | protocols while reducing CPU usage at the same time. There's
       | demos of people implementing VGA out, digital audio, all sorts of
       | interesting protocols.
        
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       (page generated 2022-02-15 23:01 UTC)