Differences

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--- attiny [2019/12/06 15:47] – [prescaler] yair
+++ attiny [2019/12/14 14:20] – yair
@@ Line 1: / Line 1: @@
 attinyX5 Family in all their gory details
-{{:atmel-2586-avr-8-bit-microcontroller-attiny25-attiny45-attiny85_datasheet.pdf|ATtiny25-ATtiny45-ATtiny85_Datasheet}}
+====pinouts====
+===ATtinyx5===
 <code c>
      ATTiny pinout
                          +-\/-+
                   Reset 1|    |8  VCC
-    (pin3) in 0 A3  PB3 2|    |7  PB2 (pin2) out mixed
+    (pin3) in 0 A3  PB3 2|    |7  PB2 (pin2) out mixed / SCK
-    (pin4) in 1 A2  PB4 3|    |6  PB1 (pin1) out 1
+    (pin4) in 1 A2  PB4 3|    |6  PB1 (pin1) out 1 / MISO
-                    GND 4|    |5  PB0 (pin0) out 0
+                    GND 4|    |5  PB0 (pin0) out 0 / MOSI
                          ------
 </code>
+{{:atmel-2586-avr-8-bit-microcontroller-attiny25-attiny45-attiny85_datasheet.pdf|ATtiny25-ATtiny45-ATtiny85_Datasheet}}
+===USBASP V2.0===
+{{:usbasp-v2.0-idc-pinout.png?300}}\\
+found [[https://tosiek.pl/usbasp-v2-0-warning-cannot-set-sck-period/|here]]
 ====System Clock Prescaler====
 goal:to control prescaler
@@ Line 26: / Line 33: @@
                   ------
 */
+</code>
+and
+<code c>
+// 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
+}
 </code>
 {{:pasted:20191206-134349.png}}