re: USB-C P/D hardware design question
@cmb I think you might have experience with this?
USB-C P/D hardware design question
I'm quite lost in the weeds of USB Type-C P/D and alt mode negotiation, so hopefully someone can help me out :)
I'm designing a simple sink, that needs to request power (not picky about voltages at all, but requesting max available would be ideal), and gets the DisplayPort signal out
From what I can see most chips don't use this configuration by default, and need either config/firmware flashing through proprietary tooling (eww), or an external controller, and there's a bunch of different (open source) firmware implementations for stm32/arduino/rp2040, with varying functionality.
What's the easiest way to get power + displayport, with the simplest (none) extra flashing steps or chips?
Ideally I could re-use a Framework top-cover too, but they're a bit too expensive to buy a replacement just for this (~100 eur). Could be marketed as a great upgrade path to the newer CNC top-cover though, so might just send Framework a message about their developer program stuff
But then I can design something really nice with the same lcd my Framework has (3:2, 2K resolution) instead of the 1080p 14" ready-built options on the market
just have to design the housing myself, eDP to USB-C boards are easy to find on aliexpress too
wooo new Vibe Chemistry release! (Drum and Bass)
#np Vibe Chemistry & Phibes - Downfall
⚠️ READ BEFORE FOLLOWING ⚠️
if i don't know you from elsewhere (under same nick), shoot me an introductory DM first (following back is fine)
I do anarchist tech stuff and run free services at https://pixie.town
I program, solder rgb led thingies, and fly fpv quadcopters
en: they/them
nl: die/dies (langzaldieleven.nl)
“i don't trust like that”
not a furry, actually
Extreme coffee-out-of-a-wineglass Energy
something something trans list stop scraping bios
and now a word from our sponsors (screenreader warning it's zalgo)
T̀ͧ̓̑͐̓̍̂̏҉̴̷͚̦̤͙̜̖͙̝͟ợ̵͈̗̮̲̥͕̼̩̭̞̙͉̆ͮͧ̉̒́̑̍̋ͭ̌ͭ̒̉́̕͟ ̐̅̈́ͯ҉̸̴҉̹̟͕̖̠̟̤͕į̸̙̮͓̤̠̘̫̦̥̣̻͚̣̎ͭͯ̋̉͝n̔̄̏̈́̃̇͛̂̋̇̐́͘͝҉͙͔̠͇̖̤̹̭̱̪v̴̴̛̘̠̰̹͚̱͉̳̘̥̞̳̪͈ͥͭ̅ͥͦ̀͛̔̃̃̎͋̋̎͐͌ͪ̚͟͢ͅö́́̎ͬ̔͑̆̃̅̒̿ͪͯ̓͏̞̱̜͍̬̗̹̫̝̪͓͕̳̬̰͘͝kͥ̒ͣͦ̌͛̃͒̀̿ͣͪͤͬ̍ͮ̚̚̕͝҉̹̰̟̰̻̻͍̠̗̳̬̬̬̞̟̹̩͇́͜ẹ̴̡̨̱̹͍̯̱̗̗͍̬̐ͣ̑͑̐̓̈̑ͥ̅́̇̃͒̀̃̂́ ̨̛͖̬͇̣͔̼̥̬̝̥̣̭̝̪͎͈̌̅͆̉̀͘͜ͅẗ́̄͊̌̍̆́̿́̊ͣͮ̅ͥͩ̔̏͏̧̳͎̥͈ͅh̴̴͇̻ͧ̍̐̈͐̎͛́̀̽̃̒̔͢͢ȩ̸̶̶̟̗̮̺̭̥͕̭͎̺̙͎̖͔ͪ̑͛̓̅ͪ̄́ͧ͡ͅ ̡̧͇̤͚̻̬͉͔̥̫̟̙ͮͩ͌̿́̆͋͜h̵̨̭̰͎̭̱͊͒́͒͆̎ͮ̈́̆ͪͧ̚͞î̛̦̞͓͖̭͈̮͔̩͙̱̖̞̳̥̦̩ͭ̂̏͒ͨ̃̿̽̓͑ͫ̕͝͡vͧ͋ͪ̌̂̑́͌̂̒͑ͮ̋̂ͫ̈́҉̹͜͢ȩ̡̖̯̞̺̭̗͔͇̻̤̼͈̙̞͉͙̈ͤ͊ͨ̀̆͆͒̓̄̿ͭ̃̚͜͝͡-̶̪̪̠̝̜̯̜̹̭̯͎͍̲̱͉ͪ̏͒̊ͫ̀̈͘͡m̸̪̘͙̰͚̗̳͕̟̖̿̌͐̔̐̈̽̃ͯ̅͢ͅͅi̸̷̧̛͍̝̦̫̮̤̐͑͗̏ͬn̡̨͆ͩͤͫ̔̈́̈́͊͐̂͛̀̚͞҉̜͍̝̰̱͚̜̹̞̝̞͈d̢̫͕͚͕̥̰̝͆͗́ͨ͑̈́̓͜ ̡̩̜͎̳͎͂̓ͫͭ͐̀͡ȑ̷ͭ̑ͪͭ͋͢͏͕̳̟͜ͅͅe̴͌̅ͣ̾͒̔́̊̔ͭ̅̄̇͏͎͉͈̤̙p̀ͥ̈ͨͩ͛ͥͣ͗̄̈́̚҉̢͔͉͍̹̮͉̺r̵̸̡̩͎̱̟̺̟̞͈̯̯̪̹͂́ͣ̐͑̒̒̀ͧͩ̿ͮ̕͞ě̵̡̱͈̜̯̳͍̝̦̜̫͈̜̗̘̪̪̓͆͑͋ͮͯͪ̅̂͐̔̆̃ͫ͑̾͒͢ͅş̶͓͉͚̜̪̜͓̘̻̃̔ͨ́̀ͅẻ̵͇͈̮̝̠͖͍̫͉͓̪̠͔̬͕͛̊͐̎̓̽ͫ̌ͧ̅̿́͘n̛͚̺͈͍̰͉͙̤̘̺͖͉̤͖̈͑͑̍̅ͪ̎͂́ͦ̒ͣ̋̆̄̄̍̃̊͟t̵̛͙͚̥͇̫̻̞͖͕̰͈̩̰̱͉ͣ̃ͫ̋̍̈ͥ͗̎ͭ͋͜i̵̡̤͇̣̰̦̟̭̮̩̲͔̭̟̖̹̙ͥ̆̋ͫ̓͌̒̾̍̄̾̎̂͂̏̇ͩ̚͢n̶̮̹̤̻͈̙͔͎̦̟ͫ̀͌͛̋̌̽̀̓̂̕g̷̣͖̠̩͈̲̥͍̦̘̺̏̍͛͋̎͛͒ͪ̇ͮ͠͝ ͦ͂́̿͐̅̌̊̌̉̍̀҉҉͈͖̮̩͎̮̬͖c͖̬̠̫̠̫̗̉̾͋͒̏̄̈́ͬ̊̓͘͝h̴̷̨͉͖̱̗̪̣͕̮͓͕̺͖͈͙̥̬͓̟ͣ̏̀͐̀́̍ͪ̋͒͐ͪ͐́̕a͍͈͉͎̥̠͍͛ͭ͛̃ͫ͒͋́͟ö͙̻͔̙͖̰́̋̑́͜s̶̸̫̖̫͇̣̻̺̹͔ͧ͐̂̈́ͮ͋̌͠.̰̯̞͎̗̺̠͔̫͍̖ͮͦ̒̏̈̾ͭͧ̉͘͢͠