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71c9c7dd78
- ubb-vga2.c (XREs, YRES, res, res_db, setup, line, hdelay, frame, session): replaced hard-coded display characteristics with a mode database - ubb-vga2.c (usage, main): new option -m to select the display mode - ubb-vga2.c (session): allocate frame buffer dynamically - ubb-vga2.c (session): since we no longer prefetch, we don't need to allocate space beyond the end of the frame buffer - ubb-vga2.c (line): resurrected "quick load" and extended it to fill the FIFO completely
Ben Blinkenlights ================= This project is a proof of concept implementation of Rikard Lindstrom's idea of using the Ben's 8:10 card slot as a general extension interface also for devices that don't speak MMC or SD/SDIO. The application is a simple LED circuit, as suggested by David Samblas. The 8:10 card slot gives access to six GPIOs, a 3.3 V supply that can be switched on and off by software, and ground. We use a simple form of multiplexing to drive ten LEDs with this interface. Note that one should only light one LED at a time. If multiple LEDs are lit, they will share the current though the common resistor, and will thus be less bright than a single LED.