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"Experimental" means that it doesn't seem to work at the moment. - regs4740.h (_LCD, LCDCTRL): added the LCD control register - ubb-vga.c (old_lcdctrl, tame_lcd, restore_lcd): make the LCD controller use short bursts, to reduce the bus access latency for other users - ubb-vga.c (keep_lcd, setup_noirq, cleanup_noirq, usage, main): new option -2 to keep on refreshing the LCD display
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.