ESP32-C3-DevKit-RUST-1 board

I bought a ESP32-C3-DevKit-RUST-1 devkit aka the RUST ESP board.

  • SoC: ESP32-C3-MINI-1
  • 6DoF IMU
  • a temperature and humidity sensor
  • a Li-Ion battery charger
  • Type-C USB

features

  • 32-bit RISC-V single-core processor, up to 160MHz
  • 384KB ROM
  • 400KB SRAM (16KB for cache)
  • 8KB SRAM in RTC
  • 22× programmable GPIOs
  • 3× SPI
  • 2× UART
  • 1× I2C
  • 1× I2S
  • 1× TWAI
  • 2× 12-bit SAR ADCs, up to 6 channels
  • 1× temperature sensor
  • Full-speed USB Serial/JTAG controller
  • General DMA controller (GDMA)
  • LED PWM controller (LEDC)
  • Remote Control Peripheral (RMT)
  • 1× 52-bit system timer
  • 2× 54-bit general-purpose timers
  • 3× watchdog timers

wireless

  • IEEE 802.11 b/g/n-compliant
  • luetooth 5, Bluetooth mesh

back to microcontrollers page.

Links

Espressif Systems ESP32-C3-DevKit-RUST-1, Github Rust ESP board User Guide, hardware, Ferrous Systems Espressif trainings, Mouser info about ESP32-C3-DevKit-RUST-1 Board,

local links

c1, c2, vm4,

History

2023-05-23: c1 - the SoC is an ESP32 C3 (RISC V), so it needs the nightly toolchain

tingo@kg-core1:~/personal/projects/2023/rust/embedded/riscv $ rustup toolchain install nightly --component rust-src
info: syncing channel updates for 'nightly-x86_64-unknown-freebsd'
info: latest update on 2023-05-23, rust version 1.71.0-nightly (8b4b20836 2023-05-22)
info: downloading component 'rust-src'
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
info: downloading component 'rust-std'
info: downloading component 'rustc'
info: downloading component 'rustfmt'
info: removing previous version of component 'cargo'
info: removing previous version of component 'clippy'
info: removing previous version of component 'rust-docs'
info: removing previous version of component 'rust-src'
info: removing previous version of component 'rust-std'
info: removing previous version of component 'rustc'
info: removing previous version of component 'rustfmt'
info: installing component 'rust-src'
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-docs'
  4.6 MiB /  13.6 MiB ( 34 %)   0 B/s in  1s ETA: Unknown                                                           5.9 MiB /  13.6 MiB ( 43 %)   4.6 MiB/s in  2s ETA:  1s                                                           8.6 MiB /  13.6 MiB ( 63 %)   3.0 MiB/s in  3s ETA:  1s                                                          13.6 MiB /  13.6 MiB (100 %)   2.9 MiB/s in  4s ETA:  0s                                                          13.6 MiB /  13.6 MiB (100 %)   3.4 MiB/s in  4s ETA:  0s
info: installing component 'rust-std'
 10.8 MiB /  27.8 MiB ( 39 %)   0 B/s in  1s ETA: Unknown                                                          21.8 MiB /  27.8 MiB ( 79 %)  10.8 MiB/s in  2s ETA:  0s                                                          27.8 MiB /  27.8 MiB (100 %)  10.9 MiB/s in  2s ETA:  0s
info: installing component 'rustc'
 13.8 MiB /  69.7 MiB ( 20 %)   0 B/s in  1s ETA: Unknown                                                          24.7 MiB /  69.7 MiB ( 35 %)  13.8 MiB/s in  2s ETA:  3s                                                          37.2 MiB /  69.7 MiB ( 53 %)  12.4 MiB/s in  3s ETA:  2s                                                          49.6 MiB /  69.7 MiB ( 71 %)  12.4 MiB/s in  4s ETA:  1s                                                          57.4 MiB /  69.7 MiB ( 82 %)  12.4 MiB/s in  5s ETA:  0s                                                          67.9 MiB /  69.7 MiB ( 97 %)  11.5 MiB/s in  6s ETA:  0s                                                          69.7 MiB /  69.7 MiB (100 %)  10.8 MiB/s in  6s ETA:  0s
info: installing component 'rustfmt'

  nightly-x86_64-unknown-freebsd updated - rustc 1.71.0-nightly (8b4b20836 2023-05-22) (from rustc 1.71.0-nightly (4a59ba4d5 2023-05-12))

info: checking for self-update

and the riscv32imc-unknown-none-elf target

tingo@kg-core1:~/personal/projects/2023/rust/embedded/riscv $ rustup target add riscv32imc-unknown-none-elf
info: component 'rust-std' for target 'riscv32imc-unknown-none-elf' is up to date

good. Try probe-run

tingo@kg-core1:~/personal/projects/2023/rust/embedded/riscv $ probe-run --list-probes
Error: no probe was found.

re-try with sudo

tingo@kg-core1:~/personal/projects/2023/rust/embedded/riscv $ sudo probe-run --list-probes
the following probes were found:
[0]: ESP JTAG (VID: 303a, PID: 1001, Serial: 34:85:18:01:62:40, EspJtag)

ok, so it is a permissions problem. Dump device description

root@kg-core1:~ # usbconfig -d ugen3.4 dump_device_desc
ugen3.4: <Espressif USB JTAG/serial debug unit> at usbus3, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON (500mA)

  bLength = 0x0012 
  bDescriptorType = 0x0001 
  bcdUSB = 0x0200 
  bDeviceClass = 0x00ef  <Miscellaneous device>
  bDeviceSubClass = 0x0002 
  bDeviceProtocol = 0x0001 
  bMaxPacketSize0 = 0x0040 
  idVendor = 0x303a 
  idProduct = 0x1001 
  bcdDevice = 0x0101 
  iManufacturer = 0x0001  <Espressif>
  iProduct = 0x0002  <USB JTAG/serial debug unit>
  iSerialNumber = 0x0003  <34:85:18:01:62:40>
  bNumConfigurations = 0x0001

add a devd config file

tingo@kg-core1:~/personal/projects/2023/rust/embedded/msp430/msp430-test-f5529 $ cat /usr/local/etc/devd/espjtag.conf 
# allow group (operator) to access the usb connection of ESP usb jtag
notify 100 {
        match "system"          "USB";
        match "subsystem"       "INTERFACE";
        match "type"            "ATTACH";
        match "vendor"      "0x303a";
        match "product"     "0x1001";
        action "usb_devaddr=`echo $cdev | sed 's#^ugen##'` && chmod g+rw /dev/usb/${usb_devaddr}.*";
};

and restart devd via service devd restart, then unplug and replug the device.

tingo@kg-core1:~/personal/projects/2023/rust/embedded/riscv $ probe-run --list-probes
the following probes were found:
[0]: ESP JTAG (VID: 303a, PID: 1001, Serial: 34:85:18:01:62:40, EspJtag)

fixed.

2023-05-23: c1 - connecting the board to my c1 workstation. From /var/log/messages

May 23 20:36:47 kg-core1 kernel: ugen3.4: <Espressif USB JTAG/serial debug unit> at usbus3
May 23 20:36:47 kg-core1 kernel: umodem0 on uhub8
May 23 20:36:47 kg-core1 kernel: umodem0: <Espressif USB JTAG/serial debug unit, class 239/2, rev 2.00/1.01, addr 4> on usbus3
May 23 20:36:47 kg-core1 kernel: umodem0: data interface 1, has CM over data, has no break

and

root@kg-core1:~ # sysctl -n dev.umodem.0.ttyname
U0

list the tty devices

root@kg-core1:~ # ll /dev/cuaU* /dev/ttyU*
crw-rw----  1 uucp  dialer  0x1be May 23 20:36 /dev/cuaU0
crw-rw----  1 uucp  dialer  0x1bf May 23 20:36 /dev/cuaU0.init
crw-rw----  1 uucp  dialer  0x1c0 May 23 20:36 /dev/cuaU0.lock
crw-------  1 root  wheel   0x1ac May 23 20:36 /dev/ttyU0
crw-------  1 root  wheel   0x1ad May 23 20:36 /dev/ttyU0.init
crw-------  1 root  wheel   0x1ba May 23 20:36 /dev/ttyU0.lock

and the usb devices

root@kg-core1:~ # ll /dev/ugen3.4 /dev/usb/3.4*
lrwxr-xr-x  1 root  wheel         9 May 23 20:36 /dev/ugen3.4@ -> usb/3.4.0
crw-------  1 root  operator   0xac May 23 20:36 /dev/usb/3.4.0
crw-------  1 root  operator   0xaf May 23 20:36 /dev/usb/3.4.1
crw-------  1 root  operator   0xb2 May 23 20:36 /dev/usb/3.4.2
crw-------  1 root  operator  0x1ab May 23 20:36 /dev/usb/3.4.3

2023-05-22: this board is v1.2a. There is a pull request #61 which notes that GPIO18 and 19 is swapped on the silkscreen.

2023-05-23: I created this page.

2023-05-22: I received the package from Mouser.

2023-05-16: the order was shipped.

2023-05-15: I ordered a ESP32-C3-DevKit-RUST-1 devkit (356-ESP32C3DVKTRUST1) from Mouser (with other items). Price was NOK 219.11.