@karotte Canon EF-S Lens Protocol. SPI, but with Open...

@karotte Canon EF-S Lens Protocol. SPI, but with Open Drain IO and Clock-Stretching :3 it's mildly horrifying. What's worse, an STM32 SPI peripheral can kind of speak that protocol

Like 11 January at 18:57 | Wall-to-wall | Open on chaos.social

4 comments

Jana

@karotte TOSLINK, very low

11 January at 19:02 | Open on chaos.social

kloenk

@janamarie @karotte does the STM32 speak that by design or accident?

11 January at 19:02 | Open on catcatnya.com

Jana

@kloenk @karotte yes

11 January at 19:05 | Open on chaos.social

@janamarie @kloenk @karotte the stm32 can also speak SWP which is a full duplex protocol on one wire using voltage modulation in a direction and current modulation in the other one, and is only specifically used by some sim cards NFC interfaces yet they did some silicon IP just for it.

speed low, curse high.

18 January at 22:07 | Open on chaos.social

Go Up