avrdude -p atmega128 -P usb -c usbasp -U lfuse:r:low:r -U hfuse:r:high:r

This makes two binary files called low and high

from http://www.avrfreaks.net/index.php?name=PNphpBB2&file=printview&t=66780&start=0

stu_san – Jul 23, 2008 – 05:51 PM
Post subject: RE: Sample Codes for ATmega128/1

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Okay, you asked for it… My Complete List O’ Newbie Links!

First of all, learn how to ask questions the smart way. Visit this site (There are translations into most languages, so not being able to read English is not an excuse.)

Beginner sites/topics:

AVR C tutorial

Embedded Electronics – Beginning with everything

A From-Scratch AVR Tutorial

Book: Arnie Aardvark’s AVR Aper?u

Book and Dev Kits: Smiley Micros – Smiley frequently posts on this forum!

Arduino development board with a large community support

ZBasic microcontrollers, Basic programmed, AVRs inside

Learning C:

Programming Tutorial: C Made Easy

How C Programming Works

And don’t forget books!

The C Programming Language is almost a necessity.

Absolute Beginners Guide To C

Writing Solid Code I personally recommend this. Lots of good tips.

Again, check out Smiley’s book.

AVRFreaks Tutorials:

The AVR Tutorials forum of avrfreaks.net contains a lot of stuff for you:

[TUT] [SOFT] WinAVR Beginner’s Quick Start Guide for ATMEGA128

[TUT] [SOFT] Setting Up AVRStudio to use GCC

[TUT] [HARD] AVR Programming Methods (Loading Code On Your AVR)

[TUT] [C] Bit manipulation (AKA “Programming 101 For Embedded Code”)

[TUT] [C] Modularizing C Code: Managing large projects

[TUT] [C++] AVR C++ Micro How-To

Interrupt Handler Syntax, By Compiler

[TUT] [SOFT] Using the USART – Serial communications

[TUT] [SOFT] Using the USART – Interrupt driven serial comms

[TUT] [C] Newbie’s Guide to AVR Timers

[TUT] [C] Creating an RTC using an internal counter/timer

[TUT] [C] Using the EEPROM memory in AVR-GCC

[TUT] [C] GCC and the PROGMEM Attribute

[TUT] [C] Newbie’s Guide to the AVR ADC

Good stuff from the AVR-Libc Manual:

AVR-libc Manual: Index

AVR-libc Manual: Frequently Asked Questions

AVR-libc Manual: Memory, Malloc, and External SRAM

AVR-libc Manual: Delay Routines

AVR-libc Manual: Interrupts

AVR-libc Manual: How to Build a Library

AVR-libc Manual: Mixing C and Assembly

Other good topics:

BASCOM-AVR – Basic for AVR processors

KAVRCalc – Calculator of AVR-specific stuff

Introduction to the “Volatile” Keyword

GCC Optimization flags – what they mean

[TUT] [C] Creating an RTC using an internal counter/timer

[DIS] [ASM] Dirty Math Tricks: Adventures in Division by Ten

Mechanical Switch Debouncing

Care and Feeding Of Watchdog Timers

Atmel App Notes – all sorts of good topics here!

Porting code from IAR to Avr-GCC

These tutorials may not answer all your questions, but they will allow you to get further faster. You’ll be able to ask better questions!

A list of RTOS links for AVR processors:

First off, check out the RTOS list in the Tuorials section: [TUT][SOFT] RTOS for AVR

All of the following are in the above tutorial

FreeRTOS: A Free RTOS for microcontrollers

AvrX: Real-Time Kernel for AVR processors

YAVRTOS: Yet Another Atmel AVR Real-Time Operating System

AVRAsmOS: A tiny OS for small AVRs

pc/OS RTOS Kernel (for larger AVR processors >= mega128)

uSmartX: Non-Preemptive Priority-based Multitask RTOS

Opex – good for smaller RAM, marked “beta”

uC/OS – Extensively tested, certified for avionics, but *not* cheap

Advanced Topics:

Linker Scripts

AVR Eclipse on Ubuntu 8.04

[MAN][HARD][SOFT] Hardware Random Number Generation

Charlieplexing: DIY, How-To

Charlieplexing: Reduced Pin-Count LED Display Multiplexing

How to use MMC/SDC (Attaching SD cards through the SPI)

FatFS File System Module for AVR

A Page O’ AVR Links