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WSAL18076 – CM-STEREO-VISION-BOARD/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The binocular stereo vision expansion board is designed for the Raspberry Pi Compute Modules CM3, CM3 Lite, CM3+, and CM3+ Lite. It provides three camera ports (CAM0 enabled by default; CAM1/CAM3 selectable via GPIO38), a DSI port, USB, a 36-pin GPIO header with a UART adapter, and a 24-pin HDMI extension connector. It also includes a DS1307 RTC chip with a CR1220 battery holder, an ICM20948 IMU fill-light board, and an acrylic mounting plate with a tripod adapter.

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Technical overview

  • Compatible with Raspberry Pi Compute Module CM3 / CM3 Lite / CM3+ / CM3+ Lite.
  • Three camera ports: CAM0 is enabled by default; set GPIO38 low to enable CAM1, or high to enable CAM3.
  • Onboard DSI port for directly connecting a DSI display.
  • Onboard USB connector for flashing the system image or for use as a regular USB port.
  • 36-pin GPIO connector with an adapter board to extend the UART port and the standard 40-pin Raspberry Pi GPIO.
  • 24-pin HDMI extended connector with an adapter board for connecting an HDMI display.
  • 10-pin GPIO/I2C extended connector for connecting the included ICM20948 IMU fill light board.
  • Integrates a DS1307 RTC chip along with a CR1220 battery holder.
  • Ships with an acrylic mounting plate and a tripod adapter, making it easy to use with a general tripod.

Commands and examples – verify before use:  

sudo raspivid -t 0 -cs 0
sudo raspivid -t 0 -cs 1
./CAM3_CAM1_Switch.sh 1
sudo make
sudo ./10Dof-D
sudo hwclock -r
sudo hwclock -s
sudo python KEY_LED.py

Notes and version constraints

  • The eMMC writing procedure requires Windows 10, a 5 V power adapter connected to the PWR interface, and the USB BOOT ENABLE switch set to EN. If issues occur, try changing the USB cable, port, or PC.
  • When writing an image to the CM3's eMMC, choose Raspbian Lite because its storage is only 4 GB; the GUI can be installed separately.
  • To use the CAM3 interface, set GPIO38 high; the order of recognized cameras may differ from the silk-screen printing.
  • Configuring the original Raspbian image for two cameras requires modifying and compiling a DTS file and copying dt-blob.bin into /boot.
  • Testing the ICM20948 requires downloading and compiling the demo code, and enabling the I2C interface via raspi-config.
  • Testing the RTC requires modifying /etc/rc.local, rebooting, and possibly setting the location and time zone.
  • Controlling the LEDs via the user key means the white fill light should be covered with paper during testing because it is very bright.

Source and revision record

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