vsdev » vsergeev

Audio Echo Effect “Pedal”

vsergeev — Sun, 28 Mar 2010 11:11:54 +0000

I recently completed an echo/delay effect “pedal” project. Although I originally developed and tested it with an electret microphone and speakers, it can be easily adapted for other input/output such as an electric guitar and amp. I used an mbed to do the actual effect processing, and the code can also be easily adapted for a different effect. See my dev wiki for more info (pictures, schematics, and code), including a video of it operating with an electric guitar: http://dev.frozeneskimo.com/embedded_projects/audio_echo_effect.

vAVRdisasm – AVR Disassembler – Updated to version 1.6

vsergeev — Sun, 21 Feb 2010 00:26:15 +0000

vAVRdisasm has been updated to version 1.6! Changes include a fix in the number-of-operands field of the SPM instruction. This bug was causing vAVRdisasm to crash during disassembly of the SPM instruction in some instances, as it was attempting to format a non-existing operand.

Visit the vAVRdisasm page for more information and links to download the new version.

ssterm – Simple Serial-Port Terminal – Updated to Version 1.1

vsergeev — Mon, 23 Nov 2009 05:22:42 +0000

ssterm has been updated to version 1.1! Changes include a major bug fix: serial port was not being opened in non-blocking mode, preventing ssterm from working in some situations; this has been fixed.

Visit the ssterm page for more information and links to the latest version.

ssterm – Simple Serial-Port Terminal – Version 1.0 Released!

vsergeev — Mon, 26 Oct 2009 11:59:42 +0000

Version 1.0 of ssterm, short for “simple serial-port terminal”, has been released! ssterm is a console-based serial port terminal with curses and stdin/stdout user interfaces. ssterm supports a variety of features, such as hexadecimal data representation, remapping of transmitted and received newlines, newline character color-coding, buffer scrolling/dumping, and data piping.

Visit the ssterm page for more information and links to download the source or binary.

vAVRdisasm – AVR Disassembler – Updated to version 1.5

vsergeev — Fri, 09 Oct 2009 03:52:20 +0000

vAVRdisasm has been updated to version 1.5! Changes include added support for DES, SPM #2, LDS (16-bit), and STS (16-bit) instructions, bringing the disassembler to support the AVR instruction set up to revision 0856H – 04/09. In addition I’ve renamed some source files to make more sense and for better organization of code.

Visit the vAVRdisasm page for more information and links to download the new version.

vAVRdisasm – AVR Disassembler – Updated to version 1.4

vsergeev — Sat, 27 Jun 2009 10:28:10 +0000

I’ve fixed a few bugs in vAVRdisasm, bringing it to version 1.4. The first is a small bug fix: vAVRdisasm no longer ends its disassembly with an invalid record error if a newline is present at the end of the program file (or encountered anywhere throughout the program file). This was a minor annoyance, as some program files have a redundant newline after the last record line in the file.

The critical fix in this version is support for odd byte length Intel Hex and Motorola S-Record records. Some program files are formatted this way, and previously vAVRdisasm would incorrectly disassemble them as it did not account for the possibility of odd byte length records. Special thanks to Ahmed for discovering and patching this bug!

See the vAVRdisasm page for more information and links to download the new version. vAVRdisasm is also available at the development wiki here.

libGIS updated to version 1.0.2

vsergeev — Sat, 27 Jun 2009 10:20:44 +0000

I’ve made a small bug fix to libGIS, updating it to version 1.0.2. The routines now better support newlines encountered in Intel Hex and Motorola S-Record formatted files. Previously the file reading routines returned an error, claiming they had encountered an “invalid record”, upon encountering a newline; now they return a return code indicating a (harmless) newline has been encountered (which are sometimes found at the end of Intel Hex and Motorola S-Record files). This makes libGIS’s record reading a bit smoother.

See the libGIS page for more information and a link to the new version.