Hi,
OK I got the bootloading part figured out (eg, it shoud work because the
esp32c3 has a serial bootloader mode in ROM that should support usb CDC,
and I see a serial port by pushing the GPIO9 button while plugging it
in), I will try to use my board as a esp32c3 devkit for now, it shoud be
similar.
(later)
So the esp32c3-devkit:usbconsole configuration works on the m5stamp-c3u.
nsh> uname -a
NuttX 10.1.0-RC1 512be93c36 Dec 9 2022 12:32:21 risc-v esp32c3-devkit
Nice.
Sebastien
Le 09/12/2022 à 11:21, Sebastien Lorquet a écrit :
Hi,
As an introduction to the RISCV, I would like to use NuttX on my
M5stamp C3U, which I can get for 8 dollars at a local store.
https://docs.m5stack.com/en/core/stamp_c3u
The module does not use a usb serial chip but direct USB connection
(there is a schematic in the bottom of the page).
I wonder how it works: Is serial on USB supported by an internal
bootloader or does this require firmware support that will disappear
after I flash this board for the first time?
I ask this dumb question here because I know there are ESP32 people on
this list.
Thanks for the help,
Sebastien
