first commit

ATTINY13_SLEEP/ATTINY13_SLEEP.ino

@@ -0,0 +1,43 @@
+#include <avr/sleep.h>
+
+#ifdef __AVR_ATtiny13__
+
+  #define SLEEP_FOREVER  128
+  #define SLEEP_016MS    (period_t)0
+  #define SLEEP_125MS    (1<<WDP1) | (1<<WDP0)
+  #define SLEEP_250MS    (1<<WDP2)
+  #define SLEEP_500MS    (1<<WDP2) | (1<<WDP0)
+  #define SLEEP_1SEC     (1<<WDP2) | (1<<WDP1)
+  #define SLEEP_2SEC     (1<<WDP2) | (1<<WDP1) | (1<<WDP0)
+  #define SLEEP_4SEC     (1<<WDP3)
+  #define SLEEP_8SEC     (1<<WDP3) | (1<<WDP0)
+
+#endif /* ifdef __AVR_ATtiny13__ */
+
+
+  // without that empty declaration, I got some problems with my other code. Maybe you don't need that.
+  ISR(WDT_vect) {
+  }
+
+
+  void sleepNow(byte b) {
+    {
+      ACSR |= (1 << ACD); //Analog comparator off
+      ACSR = ADMUX = ADCSRA = 0;
+    }
+
+    if (b != SLEEP_FOREVER) {
+      WDTCR |= b;    //Watchdog
+      // Enable watchdog timer interrupts
+      WDTCR |= (1 << WDTIE);
+    }
+    set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+
+    cli(); // No interrupts; timed sequence
+    sei(); // Enable global interrupts or we never wake
+    sleep_mode();
+    sleep_disable();
+  }
+
+
+  // calling in loop() for example: sleepNow(SLEEP_1SEC);