FreeRTOS CH32V208 Test Report

Test Environment

Operating System Information

• Source Code Link: Github CH32V Repository
• Reference Installation Document:
  • PlatformIO Core: Installation Guide
  • PlatformIO CH32V: Installation Instructions

Hardware Information

• CH32V208WBU6-EVT-R0-1v4
• 1x USB to UART Debugger
• 1x WCH-Link(E)

Installation Steps

Install PlatformIO Core

You can first check if the package manager includes platformio-core. If not, you can use the installation script:

curl -fsSL -o get-platformio.py https://raw.githubusercontent.com/platformio/platformio-core-installer/master/get-platformio.py
python3 get-platformio.py

PlatformIO Environment Configuration

Install CH32V development environment:

pio pkg install -g -p https://github.com/Community-PIO-CH32V/platform-ch32v.git

Add udev rules and apply (may need to change GROUP according to the distribution):

curl -fsSL https://raw.githubusercontent.com/platformio/platformio-core/develop/platformio/assets/system/99-platformio-udev.rules | sudo tee /etc/udev/rules.d/99-platformio-udev.rules
cat << EOF | sudo tee -a /etc/udev/rules.d/99-platformio-udev.rules
SUBSYSTEM=="usb", ATTR{idVendor}="1a86", ATTR{idProduct}=="8010", GROUP="plugdev"
SUBSYSTEM=="usb", ATTR{idVendor}="4348", ATTR{idProduct}=="55e0", GROUP="plugdev"
SUBSYSTEM=="usb", ATTR{idVendor}="1a86", ATTR{idProduct}=="8012", GROUP="plugdev"
EOF
sudo udevadm control --reload-rules
sudo udevadm trigger

Add user groups:

• Debian-based systems:

sudo usermod -a -G dialout $USER
sudo usermod -a -G plugdev $USER

• Arch-based systems:

sudo usermod -a -G uucp $USER
sudo usermod -a -G lock $USER

Prepare Project Repository

Clone the relevant repositories:

git clone https://github.com/Community-PIO-CH32V/platform-ch32v.git

Code Compilation

Compile the code using pio:

cd platform-ch32v/examples/blinky-freertos
pio run

Flashing Image

After confirming the connection of WCH-Link(E) to the SWD debugging port, use pio to flash the image:

pio run --target upload

If the burning fails, you can try specifying manually:

pio run -e your_board --target upload

Add Development Board Series

Ignore this if you are using the CBU6 series This is because other chips are not in the default chip list, so we need to add them manually. You can find the json name corresponding to your board in platform-ch32v/boards.

cat << EOF | tee -a platformio.ini
[env:your_board]
board = your_board
EOF

Common Issues

• Error: error writing to flash at address 0x00000000 at offset 0x00000000
  • This is caused by a low firmware version of the WCH-Link. (See important-notices).
  • Please use the WCH-Link Utility Tool to connect once to W2 with CH-Link for automatic update. This tool is currently only available for Windows
• Error: Read-Protect Status Currently Enabled
  • This is caused by the chip having write protection enabled. For Windows, we can use the WCH-Link Utility Tool to remove protection, and for Linux, OpenOCD can be used:

cd ~/.platformio/packages/tool-openocd-riscv-wch/bin
./openocd -f wch-riscv.cfg -c init -c halt -c "flash protect wch_riscv 0 last  off " -c exit
cd -

Logging into the System

Connect to the development board via the serial port.

Expected Results

The system should start up normally, and information should be viewable through the onboard serial port.

Actual Results

The system started up normally, and information was viewable through the onboard serial port.

Boot Log

Screen recording (from compilation to startup):

SystemClk:96000000
DeviceID: 0000051c
FreeRTOS Kernel Version:V10.4.6
task2 entry
task1 entry
task1 entry
task2 entry
task1 entry

Test Criteria

Successful: The actual result matches the expected result.

Failed: The actual result does not match the expected result.

Test Conclusion

Test successful.