m5stamp-c3dev

This is a development board for the M5Stamp C3 (RISC-V/FreeRTOS).

Hardware

External USB-C port for JTAG debugging
Support for LCD panel and SD card
Selecting a power supply
Switch(GPIO9) to enter loader mode
Pin headers to expose usable GPIOs to the outside
The size is just Japanese business card

Sample Sources Included

TrueType font with Japanese output to LCD - test_freetype.cpp
Output PNG images in SD card to LCD - test_tinypng.cpp
NTP synchronization via WiFi connection - test_nvs_wifi.cpp
Test ADC on GPIO0
- UNIT Light - main.cpp
Test I2C on GPIO18, 19
- UNIT ENV III - test_i2c_gpio1819.cpp
- UNIT ULTRASONIC - test_i2c_gpio1819.cpp
Test UART on GPIO18, 19
- UNIT GPS - test_uart_gpio1819.cpp
Test DIGITAL on GPIO18, 19
- UNIT IR - test_digit_gpio1819.cpp
WebAssembly execution with Wasm3
- Analog clock using AssemblyScript - test_wasm3_clockenv.cpp
- GPS GSV viewer using AssemblyScript - test_wasm3_gpsgsv.cpp
Support RGB LED (SK6812) - main.cpp
Usage of SPIFFS, which stores TrueType fonts and .wasm binaries (parttool.py and spiffsgen.py tools)
Use of NVS (cryptographically enabled key value store) that stores WiFi passwords (nvs_partition_gen.py tool)
Building libraries and managing dependencies using the esp-idf build system
Visual Studio Code C/C++ Extention configuration and JTAG debugging configuration in conjunction with openocd
AssembyScript sharing method between web browser and microcontroller - wasm

This repository contains MIT Licensed PCB data and example programs.

Demo

Video

📼 YouTube Demo(LCD)
📼 YouTube Demo(Wasm3)

Web Simulation

🕸 AssemblyScript Analog Clock
🕸 AssemblyScript GPS GSV Viewer

Schematic

#Unit	Name	Note	Where to get it
U1	AE-USB2.0-TYPE-C	USB 2.0 Type-C Break out board	akizukidenshi.com (JP)
U2	M5STAMP-C3	M5Stamp C3	+ M5Stack + SWITCH SCIENCE (JP)
U3	KMR-1.8SPI	KMR-1.8 SPI marked LCD and SD card interface	+ amazon.co.jp (1) + ja.aliexpress.com
R1 - R2	5.2K Resistor	Pull-down for USB Power supply	-
R3 - R7	10K Resistor	SPI pull-up	-
JP1	Jumper pin	Select external power supply	akizukidenshi.com (JP)
SW1	Tact switch	for loader mode and utility	akizukidenshi.com (JP)
J1	12 Pin header	You can use the one that comes with the M5Stamp C3 Mate	-

PCB and Gerber data

Example Source

Require

Setup ESF-IDF v4.4.2

get_idf or (Windows) ESP-IDF 4.4.2 command prompt

# Linux or macOS ->
$ alias get_idf='. $HOME/esp/esp-idf/export.sh'
$ get_idf
# <-

Detecting the Python interpreter
... snip ...
Done! You can now compile ESP-IDF projects.
Go to the project directory and run:

  idf.py build

$ echo ${IDF_PATH}
/home/hiromasa/devel/toolchain/esp/esp-idf

$ riscv32-esp-elf-gcc -v
Using built-in specs.
COLLECT_GCC=riscv32-esp-elf-gcc
... snip ...
gcc version 8.4.0 (crosstool-NG esp-2021r2)

openocd (Optional)

$ openocd
Open On-Chip Debugger  v0.10.0-esp32-20211111 (2021-11-10-21:40)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html

Build and Execute

git clone and build

git clone --recursive https://github.com/h1romas4/m5stamp-c3dev
cd m5stamp-c3dev
idf.py build flash

Note: If you get a compile error, change the sdkconfig back to the Git one. In some cases, the target of sdkconfig is changed to esp32 instead of eps32c3.

Write TypeType font to SPIFFS

parttool.py write_partition --partition-name=font --partition-subtype=spiffs --input resources/spiffs_font.bin

Write WebAssembly(.wasm) to SPIFFS

parttool.py write_partition --partition-name=wasm --partition-subtype=spiffs --input resources/spiffs_wasm.bin

Setup WiFi (Optional)

Change WiFi Setting

nvs_partition.csv: Set own [ssid], [password]

key,type,encoding,value
wifi,namespace,,
ssid,data,string,[ssid]
passwd,data,string,[password]

Create NVS Partation file

python ${IDF_PATH}/components/nvs_flash/nvs_partition_generator/nvs_partition_gen.py generate nvs_partition.csv nvs_partition.bin 0x6000

Write NVS Partation

esptool.py write_flash 0x9000 nvs_partition.bin

Restart M5Stamp C3 (NTP synchronization is performed by pressing the SW1 after the startup logo)

idf.py monitor

Select connected GPIO18 and GPIO19 device

idf.py menuconfig

C3DEV Configuration → Select GPIO 18/19

JTAG debug with Visual Studio Code

Set ESP32_TOOLCHAIN_HOME

$ echo ${ESP32_TOOLCHAIN_HOME}
/home/hiromasa/.espressif/tools/riscv32-esp-elf

Connect the PC to the USB Type-C of the U1
Open the source file in Visual Studio Code.
Run Task "openocd (debug)" @see .vscode/tasks.json
Set a breakpoint in the source code.
Debug Launch (GDB) @see .vscode/launch.json The first time you start the program, it will often fail, so if you get an error, retry.

Note

If the LCD color is inverted.

main/main.cpp

    // If the color is inverted, set to 1.
    tft.invertDisplay(0);
    // tft.invertDisplay(1);

Create SPIFFS parteation file

python ${IDF_PATH}/components/spiffs/spiffsgen.py 0x100000 resources/font resources/spiffs_font.bin
python ${IDF_PATH}/components/spiffs/spiffsgen.py 0x10000 resources/wasm resources/spiffs_wasm.bin

Change the output destination of the log to U1 Serial/JTAG.(Don't forget to put it back)

Component config → ESP System Settings → Channel for console output

idf.py menuconfig

AssemblyScript and Wasm3

Build AssemblyScript

cd wasm/clockenv # or cd wasm/gpsgsv
npm install

Web Browser Development

npm run asbuild:web
npm run start
# http://localhost:1234/

SPIFFS Build and Flash

npm run asbuild
cd ../../
python ${IDF_PATH}/components/spiffs/spiffsgen.py 0x10000 resources/wasm resources/spiffs_wasm.bin
parttool.py write_partition --partition-name=wasm --partition-subtype=spiffs --input resources/spiffs_wasm.bin

Dependencies

Thanks for all the open source.

Name	Version	License
esp-idf	`v4.4.2`	BSD License
arduino-esp32	`2.0.4`	LGPL-2.1 License
M5EPD	`0.1.4`	FreeType Part(The FreeType License)
UNIT_ENV	`0.0.5`	MIT License
M5Unit-Sonic	`0.0.2`	MIT License
Adafruit_GFX	`1.11.3`	BSD License
Adafruit_BusIO	`1.13.1`	MIT License
Adafruit-ST7735-Library	`1.9.3`	MIT License
Adafruit_NeoPixel	`1.10.5`	LGPL-3.0 License
tinyPNG	`0.11`	MIT License
lwgps	`v2.1.0`	MIT License
IRremoteESP8266	`v2.8.2`	LGPL-2.1 license
Wasm3	master(`dc9fa49`)	MIT License
AsselblyScript	`0.20.16`	Apache-2.0 License
源真ゴシック	-	SIL Open Font License 1.1

License

MIT License (includes PCB data and example source)

joydev-horst / m5stamp-c3dev Goto Github PK

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