Unreasonably Efficient AR: Using Zephyr to Achieve More with Simple Hardware
summary
A tiny wearable prototype using Zephyr on an i.MX RT500 drives a VTO 6202 OLED microdisplay over a two‑lane MIPI DSI after changing FlexSPI flash settings and fixing a long‑write bug in the DSI driver; a 16‑bit frame fits in on‑chip SRAM and achieves 1080×1080 @ 60–65 Hz with reduced regions. Camera HM01B0 arrives via parallel flexIO but falls back to SPI; the smart‑DMA is a programmable coprocessor so a disassembler and custom firmware are used to make it work.
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chapters (11)
- 0:00AR project and Zephyr
- 3:56IMX RT500 hardware
- 10:19OLED display bring-up
- 17:09Debugging display registers
- 19:17Low-power camera integration
- 24:38Smart DMA firmware issues
- 26:26Mechanical assembly and sensors
- 29:55Zephyr’s AR role
- 33:03Q&A collaboration
- 37:38Q&A board revisions
- 42:14Q&A Smart DMA options
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