mirror of
git://projects.qi-hardware.com/ben-blinkenlights.git
synced 2025-01-14 00:41:06 +02:00
7d16a0682d
- tstimg.c (printc): added diagonal to '0' (zero) to distinguish it from 'O' (oh) - tstimg.c (printc): added "nose" to '1' to better distinguish it from 'I' - tstimg.c (printc): completed the alphabet - tstimg.c (printc): added '.' character
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.