Synchronizing Two Raspberry Pi Camera Module v2.1 Cameras on Jetson Orin Nano

Issue Overview

Users are seeking guidance on how to synchronize two Raspberry Pi Camera Module v2.1 NOIR cameras connected to a Jetson Orin Nano board via the MIPI CSI-2 interface. The specific points of concern include:

• Symptoms: Users want to achieve simultaneous frame capture from both cameras, either through a master-slave configuration or by using GPIO pins to send synchronization signals.

• Context: The issue arises during the setup of dual camera systems for applications requiring synchronized image capture, such as stereo vision or depth perception.

• Hardware/Software Specifications: The cameras in question are Raspberry Pi Camera Module v2.1 NOIR, which utilize the IMX219 sensor, and they are connected to the Jetson Orin Nano via the MIPI CSI-2 interface.

• Frequency: This issue is likely common among developers working with multi-camera setups on the Jetson platform.

• Impact on User Experience: Failure to synchronize the cameras can lead to inconsistent data capture, impacting applications that rely on precise timing between frames.

Possible Causes

Several factors may contribute to challenges in synchronizing the cameras:

• Lack of Master-Slave Support: The Raspberry Pi Camera Module v2.1 may not support master-slave configurations, limiting synchronization options.

• GPIO Trigger Limitations: If the camera does not have an input pin for external synchronization signals, using GPIO pins from the Jetson board may not be feasible.

• Configuration Errors: Incorrect wiring or configuration settings could prevent successful synchronization between the two cameras.

• Sensor Limitations: The IMX219 sensor may have inherent limitations that affect its ability to synchronize with external triggers.

Troubleshooting Steps, Solutions & Fixes

To achieve synchronization of two Raspberry Pi Camera Module v2.1 cameras on the Nvidia Jetson Orin Nano, follow these steps:

1. Review Camera Specifications:

   • Check the vendor datasheet for the Raspberry Pi Camera Module v2.1 to confirm whether it supports master-slave mode for synchronization. This information is crucial for determining your approach.

2. Research Community Insights:

   • Explore forums and community discussions (e.g., Raspberry Pi forums) for insights into other users’ experiences with synchronizing these cameras. A relevant thread can be found here.

3. GPIO Configuration:

   • If master-slave mode is not supported, consider using GPIO pins from the Jetson board to send an external trigger signal:
     • Identify available GPIO pins on the Jetson Orin Nano.
     • Determine if there is a corresponding input pin on the camera module that can accept an external trigger signal.

4. Wiring Setup:

   • Connect the selected GPIO pin from the Jetson board to the appropriate input pin on each camera module (if available). Ensure proper voltage levels and signal integrity during connection.

5. Testing Synchronization:

   • Implement a simple test program that sends trigger signals through GPIO to both cameras and captures images simultaneously. Monitor for any discrepancies in frame capture times.

6. Consult Documentation and Examples:

   • Refer to NVIDIA’s documentation regarding GPIO usage and camera interfacing for additional guidance on implementation details and best practices.

7. Seek Expert Advice:

   • If challenges persist, consider reaching out to experts or community members who have experience with similar setups for personalized advice or troubleshooting tips.

8. Unresolved Aspects:

   • Users may still face unique challenges based on specific configurations or setups not covered in common solutions. Further investigation may be needed if standard troubleshooting does not resolve the problem.

By following these steps, users should be able to effectively troubleshoot and implement synchronization for their dual Raspberry Pi Camera Module v2.1 setups on the Nvidia Jetson Orin Nano.