http://dev.frozeneskimo.com/ 2008-10-19T20:50:37-07:00 http://dev.frozeneskimo.com/ http://dev.frozeneskimo.com/lib/images/favicon.ico text/html 2007-12-14T14:47:13-07:00 vsergeev http://dev.frozeneskimo.com/embedded_projects:parallel_sram?rev=1197672433&do=diff Introduction The Cypress CY62256 is a typical parallel-interface SRAM chip. It has a 512×512 array, yielding 262144 bits. Organized in 8-bit words, the capacity is 32768 bytes. Most 8-bit microcontrollers with sufficient I/O are suitable for interfacing with a parallel SRAM chip. I chose an AVR ATMega32. text/html 2007-12-14T14:45:23-07:00 vsergeev http://dev.frozeneskimo.com/embedded_projects:lc7981_hd61830_lcd_driver?rev=1197672323&do=diff I’ve found the time to post this LC7981/HD61830 driver (only graphics mode implemented) and some images of this Samsung LCD I’m using. I bought the LCD off of ebay (<http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=230070938443>) and shortly after I wrote the driver for it from scratch. I finished this driver about a month and a half ago, but I have just been too busy lately to post anything about it till now. text/html 2007-12-10T16:23:42-07:00 vsergeev http://dev.frozeneskimo.com/embedded_projects:embedded_secure_network_bridge?rev=1197332622&do=diff ESNB's full report will be posted soon. Email me at vsergeev at gmail if you would like a PDF copy before then. text/html 2007-12-08T18:24:17-07:00 vsergeev http://dev.frozeneskimo.com/resources:links:component_suppliers?rev=1197167057&do=diff Here is a list of stores I usually buy electronics components from: Online Retailers Jameco. Good deals on lots of passive parts, specifically resistors and capacitors. No minimum order (that I know of). Good shipping. I also like the organization of components on their site. text/html 2007-12-04T23:51:56-07:00 vsergeev http://dev.frozeneskimo.com/software_projects:libgis?rev=1196841116&do=diff Download the latest version of libGIS: libGIS-1.0.0.tar.gz New sample program added 12/25/2006: sizeGIS.c sizeGIS: Counts the total number of data bytes stored in an Atmel Generic, Intel HEX8, or Motorola S-Record formatted file–useful for finding out exactly how much memory the formatted file will use when it is flashed/transferred/downloaded/etc. text/html 2007-12-04T23:50:41-07:00 vsergeev http://dev.frozeneskimo.com/software_projects:deja-packet?rev=1196841041&do=diff deja-packet - Version 1.0 - June 26th, 2007 Written by Vanya A. Sergeev - vsergeev at gmail Download the latest deja-packet source here: deja-packet-1.0.tar.gz Download a gziped x86 linux binary of deja-packet here: deja-packet-linux-x86-1.0.gz text/html 2007-12-04T23:28:27-07:00 vsergeev http://dev.frozeneskimo.com/resources:usbasp_build?rev=1196839707&do=diff The computer I’m currently on (intel mac mini) doesn’t have a parallel port, so I can’t use the STK-200 style AVR-ISP to program/flash AVR chips. So, looking for the USB alternative, I stumbled across the USBasp. From the site, “USBasp is a USB in-circuit programmer for Atmel AVR controllers. It simply consists of an ATMega48 or an ATMega8 and a couple of passive components. The programmer uses a firmware-only USB driver, no special USB controller is needed.” text/html 2007-12-04T22:35:13-07:00 vsergeev http://dev.frozeneskimo.com/embedded_projects:juicebox_homebrew?rev=1196836513&do=diff 2006/01/19 - More JuiceBox Dev I’m not entirely new to microcontrollers, although I’ve never been around the ARM ones. Most of my experience comes from the Atmel AVR line of microcontrollers, but I still consider myself a noob. The JuiceBox is a great dev board to learn on. Everything is production prewired, all you have to do is write the code to work it… text/html 2007-12-04T02:33:49-07:00 vsergeev http://dev.frozeneskimo.com/software_projects:vavrdisasm?rev=1196764429&do=diff Download the latest version of vAVRdisasm source here: vavrdisasm-1.2.tar.gz Download a Mac OS X Intel binary (compiled on 10.4.8) of vAVRdisasm here: vavrdisasm-intel-osx-1.2.gz Download a Linux x86 binary of vAVRdisasm here: vavrdisasm-linux-x86-1.2.gz text/html 2007-12-04T02:18:48-07:00 vsergeev http://dev.frozeneskimo.com/home?rev=1196763528&do=diff Welcome to the VS Development wiki. I started with a development blog, but I recently decided that it wasn't the best way to share my projects. I was adding more and more “Pages”, permanent blocks of content that don't pass with time, and then I realized that a wiki would be much better suited for project content. So this is my development wiki. Well, it's not really a wiki, since only I can edit the content, but regardless of what it's called, this is where I'll be sharing my hardware and sof… text/html 2007-12-04T02:06:59-07:00 vsergeev http://dev.frozeneskimo.com/embedded_projects:home?rev=1196762819&do=diff [Array] Embedded Secure Network Bridge [Array] JuiceBox Homebrew [Array] LC7981/HD61830 LCD Driver [Array] Parallel SRAM [Array] POP3 Email Checker HD44780 LCD Driver GPS Modules SD/MMC Accelerometers I2C EEPROM SPI EEPROM Digital Thermometer RTCs text/html 2007-12-04T02:06:29-07:00 vsergeev http://dev.frozeneskimo.com/embedded_projects:pop3_email_checker?rev=1196762789&do=diff Introduction The other night I came across a 7-segment LED display and decided to interface it to a parallel port. I added a button as well. The 7-segment LED lines (each leg of the display plus the dot LEDs) are connected to the parallel port data pins (D0-D7). I have the button hooked up to nInitialize (bidirectional) and nAck (input only). I've never done a parallel port interface project before, so I figured this would be a good start.