http://www.8devices.com/wiki_carambola/ 2012-05-19T04:50:03-05:00 http://www.8devices.com/wiki_carambola/ http://www.8devices.com/wiki_carambola/lib/tpl/carambola_v2/images/favicon.ico text/html 2012-05-14T14:48:24-05:00 saulius http://www.8devices.com/wiki_carambola/doku.php/carambola_connecting_lcd_display This topic covers simple way to interface with LCD display. For this tutorial I am using cheap (under 20$) serial 2.2" display. Connection is more than simple - no soldering or electronics skills are required. See picture: * LCD_SCL -> GPIO7 * LCD_SDA -> GPIO13 * LCD_CS -> GPIO9 * LCD_RST -> GPIO11 * LCD_RS -> GPIO12 text/html 2012-03-27T15:37:04-05:00 saulius http://www.8devices.com/wiki_carambola/doku.php/carambola_demo_projects Carambola drives serial 2.2" LCD display Connecting HT1632 LED matrix driver Connecting 8MB SPI flash memory M25P64 Connecting I2C I/O expander PCF8575 Simple robot demonstration Pachube and TFA dostmann Nexus weather station Pachube and Sparkfun weather sensor text/html 2012-03-25T08:40:31-05:00 saulius http://www.8devices.com/wiki_carambola/doku.php/carambola_connecting_ht1632 This article covers how to connect HT1632 LED driver to Carambola using only it's own peripherals and how to display real-time clock. I have used my own custom made board to drive LED's, but there are some popular options in ebay (just enter “HT1632”) if you do not wish to make PCB's and solder (though code will drive circuit, but you have to adjust a bit). In my case it was a bit challenging because of small (2x2cm) LED matrix. Anyway, there is schematics. text/html 2012-03-09T08:58:45-05:00 carambola http://www.8devices.com/wiki_carambola/doku.php/mmio_fixing_ttys0 From factory Carambola is shipped with ttyS0 disabled. Or to be more precise it is in GPIO mode. Which is sometimes not what we want. It is very easy to change this. In order to change internal Carambola registers you need small tool called mmio. You can download binary file from here. Or you can download source from GitHub and compile it yourself. If you put binary file inside /tmp folder it will be deleted after you reboot your Carambola. If you wish to have this tool permanently put it insid… text/html 2012-02-03T00:16:14-05:00 saulius http://www.8devices.com/wiki_carambola/doku.php/carambola_luci cd carambola/./scripts/feeds update packages luci./scripts/feeds install -a -p lucimake menuconfig * LuCI * Applications * luci-app-ddns: Y * luci-app-firewall: Y * luci-app-ntpc: Y * luci-app-qos: Y * Libraries * luci-lib-lucid-http: Y text/html 2012-02-02T11:25:03-05:00 saulius http://www.8devices.com/wiki_carambola/doku.php/carambola_connecting_spi_flash_m25p64 About This article covers how to connect serial SPI flash memory to your Carambola. I use M25P64 flash memory in this case which is 8MB. Connecting Building firmware * Get latest OpenWrt repository and build freshly. * Enter make menuconfig and enable * Kernel modules * SPI Support * kmod-spi-dev