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1. Development Environment Setup

The "9Mod" MCP Verification Board uses STM32F103CBT6 as the main MCU, communicating with the Ai-WV01-32S-Kit development board via the emMCP library for MCP protocol interaction.

Install STM32CubeIDE

Download and install STM32CubeIDE (includes STM32CubeMX, ARM GCC toolchain, and debugger all in one):

• STM32CubeIDE Download

STM32CubeIDE is ST's all-in-one development environment. After installation you can compile, flash, and debug with no additional toolchain configuration.

Install VSCode Extensions (optional)

If you prefer editing code in VSCode, install these extensions from the marketplace:

• C/C++ — Code completion, navigation, syntax checking
• Cortex-Debug — ST-Link debugging support
• CMake — CMake syntax highlighting and integrated build

Get the Source Code

git clone https://github.com/Ai-Thinker-Open/emMCP.git

Build the Firmware

cd emMCP/example/9Mod_MCPBoard
mkdir -p build && cd build
cmake .. -DCMAKE_TOOLCHAIN_FILE=../cmake/gcc-arm-none-eabi.cmake
make -j$(nproc)

After a successful build, the build/ directory will contain the 9Mod_MCPBoard.elf firmware file.

To produce a raw binary .bin file, run:

arm-none-eabi-objcopy -O binary 9Mod_MCPBoard.elf 9Mod_MCPBoard.bin

Flash

Connect an ST-Link debugger to the SWD interface (PA13 SWDIO / PA14 SWCLK / GND). Flash via STM32CubeIDE or OpenOCD:

openocd -f interface/stlink.cfg -f target/stm32f1x.cfg \
        -c "program build/9Mod_MCPBoard.elf verify reset exit"

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2. Reference Video

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3. Peripheral Pin Quick Reference

Function Module	STM32 Pin	Interface
AI Module Communication	PA2(TX) / PA3(RX)	USART2 @ 115200
TTL Debug Serial	PA9(TX) / PA10(RX)	USART1 @ 1500000
OLED Display	PA1(DC) / PA4(CS1) / PA5(CLK) / PA7(MOSI) / PB0(CS2)	SPI
Radar Detection [Reserved]	PA8	GPIO Input
Relay	PB5	GPIO Output
WS2812 LED Strip	PA11	TIM1_CH4 PWM+DMA
IR AC Control [Reserved]	PB10(TX) / PB11(RX)	USART3
Temp/Humidity + PD Decoy	PB6(SDA) / PB7(SCL)	I²C (shared bus: SHT30=0x44, CH224K=0x40)
User Buttons	PB4 / PB8	GPIO Input
SWD Debug Port	PA13(SWDIO) / PA14(SWDCLK)	SWD

For full development documentation, refer to the emMCP Programming Guide and Quick Start Guide.