Help on using ports on WinAVR AVR tutorial

Other (more interesting?) page with tutorials.

Tree memory locations for each port:

• PORTx Data register (input 1: pullup, input 0: no pullup→tri-state, output 1: high, output 0: low)
• DDRx Data direction register (1: output, 0: input)
• PINx Port input pins

• ~ means invert int → ~_bv(5) means 11101111 not 00010000
• &= means bitwise AND
• |= means bitwise OR
• ^= means bitwise XOR

• SPI as half-duplex uart is mentioned in application notes AVR304, AVR305, AVR307
• USB Without USB chip: USB LED control project
• Soft uart without rx interrupt: Gandalf

I currently use this.

Helps: ASCII table.

• Programming problem and fix for tiny13
• Notebook on using attiny13

• AVRlib manual
• avr-libc manual
• Atmega8 datasheet
• Attiny13 datasheet

• Bunch of simple examples

• Handy command for debugging: avr-objdump -d $filename.elf > $filename.asm

All soft uart implementations use interrupts in one way or the other (timer and/or external). To understand them I'd like to test some more.

• Googled a Howto for external interrupts

Next try, inspired by tuxgraphics.org.

Programmer description plus how to build, they use this software.

*SUCCES*

• "WinAVR Programmer" seems simple enough.
• STK200 simplified and buffered from ELM

I'm having problems with both of the above :(

Helpful guide to installing eclipse with AVR support.

• http://www.cs.hut.fi/Studies/T-106.530/2006/eclipse-avr.pdf

yuy, Ubuntu has packages for all required parts :)

• avrdude
• avrdude-doc
• binutils-avr
• uisp

• make
• avr-libc
• gcc-avr

For quick reference
Atmega8

Attiny13