我用我的attiny85 Arduino纳米闪存芯片。本指南有助于建立董事会。你也可以使用一个特定的attiny85程序员板。
温度也不被以节省电池寿命。在attiny85睡眠模式是用来降低功耗。本代码是基于工作的网站上re-innovation.co.uk Matthew Little。来源
温度可以设置你喜欢的,默认被设置为18°C开关
代码如下,它可以下载附件。
#include <avr/sleep.h>;
#include <avr/wdt.h>;
// Routines to set and clear bits (used in the sleep code)
#ifndef cbi
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#endif
#ifndef sbi
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
#endif
volatile boolean f_wdt = 1;
const int redPin = 1;
const int bluePin = 0;
const int sensorPin = 2;
const int fadeTime = 10;
// blue = 0, red = 1
int currentColor = 0;
void setup()
{
pinMode(redPin, OUTPUT);
pinMode(bluePin, OUTPUT);
setup_watchdog(8);
digitalWrite(bluePin, HIGH);
digitalWrite(redPin, LOW);
}
void loop()
{
if (f_wdt==1) { // wait for timed out watchdog / flag is set when a watchdog timeout occurs
f_wdt=0; // reset flag
checkTemp();
system_sleep(); // Send the unit to sleep
}
}
void checkTemp()
{
int reading = analogRead(sensorPin);
float voltage = reading * 3.3;
voltage /= 1024.0;
float temperatureC = (voltage - 0.5) * 100 ;
if(temperatureC > 18) {
if(currentColor != 1){
currentcolor = 1;
fadetored();
}
} else if!= 0) {
currentColor = 0;
fadeToBlue();
}
}
void fadeToRed(){
int redVal = 255;
int blueVal = 0;
for( int i = 0 ; i < 255 ; i += 1 ){
blueVal += 1;
redVal -= 1;
analogWrite( bluePin, 255 - blueVal );
analogWrite( redPin, 255 - redVal );
delay( fadeTime );
}
}
void fadeToBlue(){
int redVal = 0;
int blueVal = 255;
for( int i = 0 ; i < 255 ; i += 1 ){
blueVal -= 1;
redVal += 1;
analogWrite( bluePin, 255 - blueVal );
analogWrite( redPin, 255 - redVal );
delay( fadeTime );
}
}
// set system into the sleep state
// system wakes up when watchdog is timed out
void system_sleep() {
cbi(ADCSRA,ADEN); // switch Analog to Digitalconverter OFF</p><p> set_sleep_mode(SLEEP_MODE_PWR_DOWN); // sleep mode is set here
sleep_enable();</p><p> sleep_mode(); // System actually sleeps here</p><p> sleep_disable(); // System continues execution here when watchdog timed out
sbi(ADCSRA,ADEN); // switch Analog to Digitalconverter ON
}
// <a href="http://www.re-innovation.co.uk/web12/index.php/en/blog-75/306-sleep-modes-on-attiny85" rel="nofollow"> http://www.re-innovation.co.uk/web12/index.php/en...</a>
// 0=16ms, 1=32ms,2=64ms,3=128ms,4=250ms,5=500ms
// 6=1 sec,7=2 sec, 8=4 sec, 9= 8sec
void setup_watchdog(int ii) {
byte bb;
int ww;
if (ii > 9 ) ii=9;
bb=ii & 7;
if (ii > 7) bb|= (1<<5);
bb|= (1<<wdce);
ww=bbl;
MCUSR &= ~(1<<wdrf);
// start timed sequence
wdtcr |= (1<<WDCE) | (1<<WDE);
// set a new watchdog timeout value
WDTCR = bb;
WDTCR |= _BV(WDIE);
}