Binocular Stereo Vision Expansion Board for Pi Compute Module CM3 Series

This binocular stereo vision expansion board is specially designed for Raspberry Pi Compute Module, compatible with CM3 / CM3 Lite / CM3+ / CM3+ Lite. It features three camera ports and common used ports like DSI and USB, more other peripheral interfaces are also supported through the FPC connector, all in the small size body.



By connecting with various sorts of cameras, combined with the included IMU fill light board, it is easy and flexible to build different Raspberry Pi stereo vision projects such as binocular parallax ranging, facial identification, living object detection, VR video recording, and so on.

Quick Spec

• Compatible with Raspberry Pi Compute Module CM3 / CM3 Lite / CM3+ / CM3+ Lite
• Three camera ports, CAM0 port for default use, and CAM1/CAM3 ports are two alternative options selected by GPIO
• Onboard DSI port, allows directly connecting with DSI display
• Onboard USB connector, convenient for flashing system image, or used as regular USB port
• 36PIN GPIO connector, comes with adapter board for extending UART port and standard 40PIN Raspberry Pi GPIO
• 24PIN HDMI extended connector, comes with adapter board for connecting with HDMI display
• 10PIN GPIO/I2C extended connector, for connecting the included ICM20948 IMU fill light board
• Integrates DS1307 RTC chip, along with CR1220 battery holder
• Comes with acrylic mounting plate and tripod adapter, make it easy to use with general tripod
• Comes with development resources (examples and user manual)
• Dimensions: 88 x 37.5mm
• Net Weight: 173g

Dimensions

Board Layout - The CM3 Base Board

1. Compute Module Connector: for connecting with Compute Module CM3 / CM3 Lite / CM3+ / CM3+ Lite
2. DSI Display Port: for connecting with Raspberry Pi DSI display
3. 24PIN HDMI Extended Connector: for connecting with HDMI display via HDMI adapter
4. CSI Camera Port
• CAM0: enabled by default
• CAM1: set GPIO38 low to enable
• CAM3: set GPIO38 high to enable
5. Micro SD Card Slot: for Micro SD card with pre-flashed system image
6. 36PIN GPIO Connector: for extending UART port and Raspberry Pi GPIO via adapter
7. 10PIN I2C Connector: for connecting with ICM20948 IMU fill light board
8. USB Connector: for flashing system image, or used as regular USB port
9. 5V Power Input
10. RTC Battery Holder: supports CR1220 button battery
11. DS1307: RTC chip
12. USB BOOT ENABLE Switch
• EN: allows flashing system image via USB port
• DIS: set the port as regular USB port
13. User Key

Board Layout - The UART Adapter

1. Raspberry Pi GPIO Interface: for connecting with Raspberry Pi HATs
2. 36PIN GPIO Connector: for connecting with CM3 base board
3. USB TO UART Port: allows accessing Raspberry Pi via serial terminal, or used as power supply
4. CH340: USB TO UART chip
5. UART Power Switch
• OPEN: disconnect from the USB TO UART power supply
• Link: connect to the USB TO UART power supply

Board Layout - The IMU Fill Light Board

1. ICM-20948
• Accelerometer
• Resolution: 16 bit
• Measurement range (configurable): ±2, ±4, ±8, ±16g
• Operating current: 68.9uA
• Gyroscope
• Resolution: 16 bit
• Measurement range (configurable): ±250, ±500, ±1000, ±2000°/sec
• Operating current: 1.23mA
• Magnetometer
• Resolution: 16 bit
• Measurement range: ±4900µT
• Operating current: 90uA
2. White Fill Light: controlled via GPIO
3. 850nm IR Fill Light: controlled via GPIO
4. 10PIN I2C Connector: for connecting with CM3 base board
5. 6PIN I2C Header: for connecting with host board

Resources

• Product Page
• Product Wiki
• ICM20948 Datasheet
• dts file for camera
• CM_STEREO_BOARD Demo Codes
• RPiboot_setup.exe Software

Shipping List

• 1 x CM3 base board
• 1 x ICM20948 IMU fill light board
• 1 x UART adapter
• 1 x 40PIN header
• 1 x HDMI adapter
• 1 x USB OTG cable
• 2 x Camera mounting board
• 1 x Base mounting board
• 1 x 36PIN FPC
• 1 x 24PIN FPC
• 1 x 10PIN FPC
• 1 x Acrylic mounting plate
• 1 x Tripod adapter
• 2 x 22PIN to 15PIN FPC
• 1 x Screw pack