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attinyX5 Family in all their gory details
pinouts
ATtinyx5
ATTiny pinout +-\/-+ Reset 1| |8 VCC (pin3) in 0 A3 PB3 2| |7 PB2 (pin2) out mixed / SCK (pin4) in 1 A2 PB4 3| |6 PB1 (pin1) out 1 / MISO GND 4| |5 PB0 (pin0) out 0 / MOSI ------
USBASP V2.0
found here
System Clock Prescaler
goal:to control prescaler
in mindfuckHS code original author has this to say about his clock configuration
/*
Timer 1 is used in this case.
the prescaler is ck1 /2 and the ocr1 is 60
see // see http://www.atmel.com/Images/atmel-2586-avr-8-bit-microcontroller-attiny25-attiny45-attiny85_datasheet.pdf
See table 13-5
CS13, CS12, CS11, CS10 = [ 0, 0, 1, 0] is prescaler/2
------
*/
and
// the setup function runs once when you press reset or power the board void setup() { DDRB = B00000111; //could use this // initialize timer1 noInterrupts(); // disable all interrupts TCCR1 = 0; //stop the timer TCNT1 = 0; //zero the timer OCR1A = 200; //50 //set the compare value OCR1C = 200; //50 //set the compare value ??? needed TIMSK = _BV(OCIE1A); //interrupt on Compare Match A TCCR1 = _BV(CTC1) | _BV(CS11); // Start timer, ctc mode, prescaler clk/2 interrupts(); // enable all interrupts }