search

raspberrypi / picotool

BSD 3-Clause "New" or "Revised" License
581 stars 103 forks source link

Flash RPI Pico Over GPIO Pins #152

Open mrmattrigby opened 12 hours ago

mrmattrigby commented 12 hours ago

Is it possible to flash a Pico over the UART pins instead of over the serial USB connection? I have a project that will use several RPI Pico's, each connected over a mux to a controller with their UART0 TX and UART0 RX connected for message transferring. This eliminated managing USB port's on a server, but now updates to the design will require individually accessing each device.

Essentially, I was hoping for a "picotool -f" option with a UART select instead of over USB. Is this possible?

Thanks!

lurch commented 6 hours ago

AFAIK it's not possible to "flash" a Pico over UART (unless you've got some custom/3rd-party bootloader running on the Pico that provides that functionality), but the Pico 2 can "boot" over UART - see section 5.8. of https://datasheets.raspberrypi.com/rp2350/rp2350-datasheet.pdf