Programming Attiny2313 With Arduino Uno

27/4/2014 Programming Attiny2313 with Arduino Uno

http://www.ernstc.dk/arduino/2313.htm 1/4

Programming Attiny2313 with Arduino Uno

The 2313 processor is a 20 pin chip with 17 I/O pins, it do not have a ADC (analog/digital converter)It can be configured to run at 1 MHz and 8 MHz without External Crystal/Resonator

A comparison of the Tiny-family

2313 pinout Connection to Arduino

Download the Tiny-core here: code.google.com/p/arduino-tiny/ Follow the instructions in the readme.txt file

Connect your Arduino to the Attiny according to the picture to the right

connection to Arduino:

Arduino Attiny2313

13 19 PB7/SCK



12 18 PB6/MISO

11 17 PB5/MOSI

10 1 PA2/Reset

5v 20 VCC

GND 10 GND

Upload the ArduinoISP to the Arduino dont't connect the capacitor yet.More information on this stepNote: the ArduinoISP has some issues in ver. 1.00See this fix for a solutionConnect a 10 F capacitor from reset to ground on the arduino (negative side to ground)If you are using a Duemilanove use a 120 ohm resistor from reset to VccOpen the blink sketch from the examples->Basic->BlinkSelect Attiny2313: Tools->Board-> Attiny2313@1MHZSelect ArduinoISP: Tools->Programmer->Arduino as ISPUpload your sketch: Select File->Upload using programmerConnect a LED with resitor to pin PB4 (physical pin 16)Now you should have a blinkining Led on your Attiny 2313

Note the factory default is 1MHz, if you want to run it @ 8MHz, use: burn bootloader.

Select board -> Attiny2313@8MHZSelect ->Tools->Programmer->Arduino as ISPselect ->Tools->Burn Bootloader

Note: this step do not burn a bootloader to your chip, it is only used to set the fuses to another clock-speed.

When you use it in your project, it will be a good idea to connect A 0.1 uF across VCC and GND as close to the processor as possible, and a 10 K ohm resistor from RESET to VCC.

Communication with Attiny2313

It is always nice to be able to get debug information from your tiny. On an Arduino you are used to use Serial.print() for this purpose.Luckily you can use this on Attiny as well.Actually you have more options:

TinyDebugSerial - comes with the core files (only output from attiny)

SoftwareSerial - use the SoftwareSerial library (Input/output attiny)

TinyKnockbang - use TinyISP(only output fram attiny)

RELAY_SERIAL - use TinyISP(Input/output attiny)

A more detailed explanation: here

A solution for the missing ADC

Atmel has some application notes on how to make a cheap ADC, using the comparator On the Attiny2313. For example:http://www.atmel.com/Images/doc0942.pdf

Sadly they don't provide any programming examples. But I recently found an easy solutionhttp://learn.adafruit.com/photocells/using-a-photocell

The sketch in the buttom of this page use a digitalRead() to measure the time in a rc-network.

In the example they use a photoresistor, but you can substitute this with a potentiometer.I tried it With a 10 kOhm potmeter and a 0.1uF capacitor, which gave me readings between 0 and 600In the sketch PIN 2, is PD2 on Attiny2313 - physically pin #4

Physical/logical pin numbers.F.ex. pin 13 in the blink example is the physical pin 16See the cheet sheet



// ATMEL ATTINY2313

//

// +-\/-+

// (D 17) PA2 1| |29 VCC

// RX (D 0) PD0 2| |19 PB7 (D 16)

// TX (D 1) PD1 3| |18 PB6 (D 15)

// (D 2) PA1 4| |17 PB5 (D 14)

// (D 3) PA0 5| |16 PB4 (D 13)*

// INT0 (D 4) PD2 6| |15 PB3 (D 12)*

// INT1 (D 5) PD3 7| |14 PB2 (D 11)*

// (D 6) PD4 8| |13 PB1 (D 10)

// *(D 7) PD5 9| |12 PB0 (D 9)

// GND 10| |11 PD6 (D 8)

// +----+

//

// * indicates PWM port

Coding Badly's ArduinoTinyISP

Avrdude tutorial

Avrdude, when using ArduinoISPavrdude -P COM20 -b 19200 -p t2313 -c avrispUpload using TinyISP-p attiny2313 -c stk500v1 -P COM3 -b19200 -Uflash:w:Blink.hex:i

Links regarding Attiny 2313 and Attiny85

IR-library for the Tiny's

38 KHz timers ATtiny84/85

Using the reset pin, and HV programmer

Optiboot 8Mhz

Arduino as ISP (ver 1.0) changes in sketch

Reducing baud rate in Arduino 1.0



Pin numbers

missing entry in avrdude.conf

Issues Arduino 1.0

Programming the Att2313 with Duemillanove

Using Arduino as seriel/USB controller

Tiny core release

About TinyTuner

Arduino as ISP (Playground)

Disabling reset

PeterVH Leonardo as ISP

Software serial receaive only

Arduino 1.0 and ISP not working

NG timer - PWM attiny85

Fix for Tiny > 4kb

AREF on attiny's

Attiny85 Remote control

ISP Attiny85

38Khz timer 84/85

Sleep demo code

TinyTuener2

Tom Carpenters Tiny Core

Coding Badly experimently Tiny Core

Tiny13 and KnockBang

Tiny core and version 1.5

Servo library for Tiny (by tylernt)

Other Arduino links:

Standalone Arduino

Standalone Nick Gammon, and chip-detector

Standalone Arduino 8mhz bootloader

Nick Gammon fuse calculator

ArduinoToBreadboard

More Standalone Arduino

328 vs 328p

Level shifting (SD Card)

PWM frequence Library

LM317 as LED driver

IR 38 khz generating

Disassemble Arduino code

Documents

Programming Attiny2313 With Arduino Uno