ATtiny

Rychly zoznam projektov a stranok k programovaniu ATtiny (vid aj projekty DTV)

• Pighixxx Pinout diagram https://pighixxx.tumblr.com/image/93202369320

• ATtiny Core library for Arduino https://github.com/SpenceKonde/ATTinyCore

Strasne vela navodov je na strankach Roba Ulbrichta https://www.arduinoslovakia.eu/ Napriklad:

• Uvod a prehlad projektikov
• ATtiny + ISP a vystupy = projekt DTV v SMD verzii

• Blik
• Tlacitko
• PWM na LEDky
• Generator zvukov
• ATtiny85 a displej TM1637
• 10-bitové PWM
• Jednoducha hracka

Nelineárna citlivosť ľudského oka

SparkFun

• ATtiny Guide
• Quick Reference Sheet - vytlacit na cvika
• RGB sviecka - blikajuce 3 RGB
• Detektor pretecenia vody na baterku CR3202 aj s modifikaciami programu

Technoblogy

• Zoznam
• Push-Button On/Off Switches
• Playing Notes on the ATtiny85
• I2C
  • Minimal Tiny I2C Routines
  • Minimal I2C for the New AVR Microcontrollers
  • Making Your Own I2C Peripherals
• InfraRed Remote
  • IR Remote Control Receiver
  • IR Remote Control Tool
  • IR Remote Wand
  • IR Remote Control Detective (Updated)

Dalsie:

• Da sa programovat v Blockly cez simulator v TinkerCADe
• Vseobecne
• http://homemadehardware.com/guides/programming-an-attiny85/
• Vseobecne
• SPI Master aj Slave
• I2C Master aj Slave !!!
• RGB demo
• Power save rezimy su dobre opisane (aj s projektom na casovac s pipakom): http://www.technoblogy.com/show?KX0
• Sapien IR CTRL Palov projekt s USB aj IR
• RGB Led tutorial

Problemy

• Ked budu programovacie piny obsadene LED alebo tlacitkom tak moze byt problem, trocha sa tomu venuju tuto: https://www.kanda.com/avr-isp-circuits.html
  • Alternativou moze byt UPDI Unified Program and Debug Interface (UPDI) programator, ktory pouziva len jeden pin - podobne ako DebugWire.
  • Taky programator sa da spravit z Arduino Nano napr. https://daumemo.com/diy-updi-usb-programmer-which-can-be-made-with-cheap-hardware/
  • Zakazat RESET (aby bol k dispozicii dalsi pin) nema zmysel, pretoze bez RESETu sa neda cip preprogramovat inak ako v HV programatore

Fuses

• Explain https://embedderslife.wordpress.com/2012/08/20/fuse-bits-arent-that-scary/
• https://sheepdogguides.com/arduino/attiny/fuses.htm
• https://leo.leung.xyz/wiki/ATtiny85
• http://eleccelerator.com/fusecalc/fusecalc.php?chip=attiny45&LOW=6A&LOCKBIT=FF
• https://www.engbedded.com/fusecalc/

Na koniec:

• https://github.com/MCUdude/MightyCore - moznost Arduino programovania pre ATmega16 a 32

Program na jednoduché blikanie LEDkou

AVR CArduinoAssembler

#include <avr/io.h>

/* Pripojenie periferii k vyvojovej doske Arduino: */

#define LED1  PB5  // zabudovana dioda 
#define SW1  PB4

int main(void)
{
  /*** ToDo ***/
  return 0;
}

#define LEDpin 4  //aby nekolidovalo s programatorom, takto sa da trvale nechat pripojeny

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LEDpin, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(LEDpin, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(100);                       // wait for a second
  digitalWrite(LEDpin, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

/*
 *  LED Blink s periodou 100:1000 ms 
 *  delay vygenerovane tu http://darcy.rsgc.on.ca/ACES/TEI4M/AVRdelay.html
 *  pre frekvenciu 8 MHz (ATtiny45, internal osc.)
 * 
 *  LED je pripojena na pin7 (PORTB.2)
 */ 

START:	        SBI DDRB,2       ; DDRB.2 = 1 (t.j. Output)
LOOP:
		SBI PORTB,2      ; PORTB.2 = 1 (t.j. High, rozsviet LED)

;		CALL DELAY      ; UNSUPPORTED INSTRUCTION ON ATtiny!!!!
	    
		ldi  r18, 5     ; 100ms SVIETI
		ldi  r19, 15
		ldi  r20, 242
L1:		dec  r20
		brne L1
		dec  r19
		brne L1
		dec  r18
		brne L1
		nop

		CBI PORTB,2     ; PORTB.2 = 0 (t.j. Low, zhasni LED)

		ldi  r18, 41    ; jedna seunda nesvieti (vypocet pre 8MHz!!!)
		ldi  r19, 150
		ldi  r20, 128
L2:		dec  r20
		brne L2
		dec  r19
		brne L2
		dec  r18
		brne L2
		nop

		RJMP LOOP		; Skok na zaciatok