first commit

ATTINY13_BLINK_ms/ATTINY13_BLINK_ms.ino

@@ -0,0 +1,46 @@
+
+#include <avr/io.h>
+#include <util/delay.h>
+#include <avr/sleep.h>
+#include <avr/power.h> 
+    
+const int ledPin = 4; //1;
+
+//#define F_CPU 16000000UL
+
+void sleepNow() {
+  {
+//    BODCR |= (1<<BODS)|(1<<BODSE);       //Disable Brown Out Detector Control Register
+    ACSR |= (1<<ACD);   //Analog comparator off
+    ACSR = ADMUX = ADCSRA = 0;
+  }
+
+  WDTCR |= (1<<WDP3) ;      //Watchdog set for about 4 seconds
+ 
+  // Enable watchdog timer interrupts
+  WDTCR |= (1<<WDTIE);
+  sei(); // Enable global interrupts
+  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+  sleep_mode();
+  sleep_disable();
+}
+
+void setup() {
+  DDRB  = 0b000001; // all but PB0 INPUT, want to use PB0 ...
+  PORTB = 0b000000; // all LOW
+  
+  pinMode(ledPin, OUTPUT);
+  digitalWrite(ledPin, LOW);
+}
+
+
+void loop() {
+  digitalWrite(ledPin, HIGH);
+  _delay_ms(10);
+
+  digitalWrite(ledPin, LOW);
+ // _delay_ms(300);
+  
+  sleepNow();
+
+}