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Added idle mode to the delay function 

The controller will be sent to idle mode if the remaining delay time allows this. It will be woken up by any interrupt, which will be latest by the timer0 interrupt.

Rebase of https://github.com/arduino/Arduino/pull/2240/
This commit is contained in:
Zorph 2017-11-13 15:58:15 +01:00 committed by Martino Facchin
parent 6c861d8c70
commit 63f2cf419e
1 changed files with 4 additions and 0 deletions
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4
cores/arduino/wiring.c
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@ -21,6 +21,7 @@
*/
#include "wiring_private.h"
#include <avr/sleep.h>
// the prescaler is set so that timer0 ticks every 64 clock cycles, and the
// the overflow handler is called every 256 ticks.
@ -107,13 +108,16 @@ void delay(unsigned long ms)
{
uint32_t start = micros();
sleep_enable();
while (ms > 0) {
yield();
while ( ms > 0 && (micros() - start) >= 1000) {
ms--;
start += 1000;
}
if (ms>MILLIS_INC) sleep_cpu();
}
sleep_disable();
}
/* Delay for the given number of microseconds. Assumes a 1, 8, 12, 16, 20 or 24 MHz clock. */