The project involved developing a ECU with a reliable rear-view camera system for heavy-duty trucks. The system consisted of a camera mounted at the extreme rear of the trailer (potentially 15-20 meters away) connected to a central Electronic Control Unit (ECU) located in the truck’s cabin. The ECU, running a custom Linux Board Support Package (BSP) on an automotive-grade SoC (e.g., NXP i.MX8QXP variant), needed to display a low-latency live video feed from the rear camera onto the main infotainment display.
Deliver a stable 1080p camera signal over 15–20 meters in a noisy automotive environment.
Achieve glass-to-glass latency well under 100 ms for real-time driver visibility.
Ensure rugged hardware, seamless Linux BSP/V4L2 support, and PoC-based power delivery.
Legacy truck rear-view camera systems failed to handle long-distance footage, low-latency, and severe situations. The customer sought a dependable solution. Power supply and Linux BSP integration complicated things.
MIPI CSI-2 is meant for <30 cm runs, so sending it 15–20 m in a noisy truck environment risks severe signal integrity issues.
Safety-critical reversing operations demanded sub-100 ms glass-to-glass latency.
Equipment needed to endure vibration, temperature extremes, moisture, and dirt.
Supplying power to the camera over long distances without voltage drop or noise.
Camera system needed full V4L2/Media Controller integration within the custom Yocto-based BSP.
Silicon Signals designed and delivered a GMSL-based SerDes link architecture to meet all performance and reliability requirements
OV2311 image sensor + GMSL serializer converts MIPI CSI-2 into high-speed serial video stream.
Automotive-grade coax/STP carries video, I²C control, GPIOs, and power over PoC in a single link.
NXP i.MX8QXP ECU with GMSL deserializer linked to CSI-2 receiver, featuring integrated PoC circuit.
Custom Linux V4L2 sub-device driver handles GMSL link init, PoC management, and error reporting.
Standard V4L2 sensor driver routed via GMSL’s virtual I²C bridge ensures reliable image streaming.
Optimized GStreamer userspace display with kmssink enables ultra-low latency video performance.
Proven Engineering Outcomes Backed by Our Expertise in Low-Latency Video, Rugged Design, and Automotive Reliability.
Let’s build the right solution for your automotive needs.
Results You Can Count On
NXP i.MX8QXP SoC, OV2311 sensor, Maxim GMSL SerDes (e.g., MAX9296), automotive coax/STP.
Linux Yocto BSP, V4L2, Media Controller, Device Tree bindings, GStreamer, DRM/KMS.
Custom Device Tree bindings, deserializer & sensor drivers, latency-optimized pipelines.
Oscilloscope, photodiode, signal generator, v4l2-ctl, debugfs, custom V4L2 test apps, truck simulator/real vehicle.
Provided low-latency, dependable video, easier wiring, cost savings, and automobile compliance.
Stable 1080p video transmission acquired over 20 meters with zero signal loss or interference.
Power-over-Coax streamlined cabling design, reducing wiring complexity and providing power.
Glass-to-glass latency is preserved below 80 ms, guaranteeing safe reversing and fast driver response.
Rugged automotive-grade design guaranteed reliability under heat, vibration, dust, and moisture.
If you're ready to build a dependable, low-latency, long-distance automotive camera system, this case study shows what’s possible when engineering and innovation align.
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