Arduino 低功耗优化
来自Jack's Lab
(版本间的差异)
(→深入 ATMEGA 328) |
|||
第19行: | 第19行: | ||
[[文件:Atmega328p-power-mode.png]] | [[文件:Atmega328p-power-mode.png]] | ||
+ | <br><br> | ||
+ | == 代码 == | ||
− | + | <source lang=java> | |
− | < | + | #include <avr/sleep.h> |
+ | #include <avr/wdt.h> | ||
+ | |||
+ | volatile byte data=0; | ||
+ | |||
+ | void setup() { | ||
+ | pinMode(13,OUTPUT); | ||
+ | setup_watchdog(9); | ||
+ | // 0=16ms, 1=32ms,2=64ms,3=128ms,4=250ms,5=500ms | ||
+ | // 6=1 sec,7=2 sec, 8=4 sec, 9= 8sec | ||
+ | ACSR |=_BV(ACD);//OFF ACD | ||
+ | ADCSRA=0;//OFF ADC | ||
+ | Sleep_avr();//Sleep_Mode | ||
+ | } | ||
+ | |||
+ | void loop() { | ||
+ | |||
+ | if(data>=7){ | ||
+ | data=0; | ||
+ | //------------------------------- | ||
+ | digitalWrite(13,HIGH); | ||
+ | delay(100); //此处是到达设置唤醒时间允许的程序 | ||
+ | digitalWrite(13,LOW); | ||
+ | //-------------------------------- | ||
+ | Sleep_avr(); | ||
+ | } | ||
+ | else { | ||
+ | Sleep_avr(); //Continue Sleep | ||
+ | } | ||
+ | |||
+ | } | ||
+ | |||
+ | //Sleep mode is activated | ||
+ | void setup_watchdog(int ii) { | ||
+ | |||
+ | byte bb; | ||
+ | |||
+ | if (ii > 9 ) ii=9; | ||
+ | bb=ii & 7; | ||
+ | if (ii > 7) bb|= (1<<5); | ||
+ | bb|= (1<<WDCE); | ||
+ | |||
+ | MCUSR &= ~(1<<WDRF); | ||
+ | // start timed sequence | ||
+ | WDTCSR |= (1<<WDCE) | (1<<WDE); | ||
+ | // set new watchdog timeout value | ||
+ | WDTCSR = bb; | ||
+ | WDTCSR |= _BV(WDIE); | ||
+ | |||
+ | |||
+ | } | ||
+ | //WDT interrupt | ||
+ | ISR(WDT_vect) { | ||
+ | |||
+ | ++data; | ||
+ | // wdt_reset(); | ||
+ | |||
+ | } | ||
+ | |||
+ | void Sleep_avr(){ | ||
+ | set_sleep_mode(SLEEP_MODE_PWR_DOWN ); // sleep mode is set here | ||
+ | sleep_enable(); | ||
+ | sleep_mode(); // System sleeps here | ||
+ | } | ||
+ | </source> | ||
<br><br> | <br><br> | ||
<br><br> | <br><br> |
2015年3月17日 (二) 16:06的版本
1 概述
常用的 Atmega328p 最小系统下 16MHz 运行功耗大约是10mA,一块手机1200mAh的电池大约可不间断运行 1200/10/24 = 5天,这个还是在没有任何外围器件的情况下,算上外围设备如温度传感器等,连续运行的时间更短
2 深入 ATMEGA 328
328P有6种节电设置,分别是:
- 空闲模式
- ADC 噪声抑制模式
- 掉电模式
- 省电模式
- Standby 模式
- 扩展Standby 模式
3 代码
#include <avr/sleep.h> #include <avr/wdt.h> volatile byte data=0; void setup() { pinMode(13,OUTPUT); setup_watchdog(9); // 0=16ms, 1=32ms,2=64ms,3=128ms,4=250ms,5=500ms // 6=1 sec,7=2 sec, 8=4 sec, 9= 8sec ACSR |=_BV(ACD);//OFF ACD ADCSRA=0;//OFF ADC Sleep_avr();//Sleep_Mode } void loop() { if(data>=7){ data=0; //------------------------------- digitalWrite(13,HIGH); delay(100); //此处是到达设置唤醒时间允许的程序 digitalWrite(13,LOW); //-------------------------------- Sleep_avr(); } else { Sleep_avr(); //Continue Sleep } } //Sleep mode is activated void setup_watchdog(int ii) { byte bb; if (ii > 9 ) ii=9; bb=ii & 7; if (ii > 7) bb|= (1<<5); bb|= (1<<WDCE); MCUSR &= ~(1<<WDRF); // start timed sequence WDTCSR |= (1<<WDCE) | (1<<WDE); // set new watchdog timeout value WDTCSR = bb; WDTCSR |= _BV(WDIE); } //WDT interrupt ISR(WDT_vect) { ++data; // wdt_reset(); } void Sleep_avr(){ set_sleep_mode(SLEEP_MODE_PWR_DOWN ); // sleep mode is set here sleep_enable(); sleep_mode(); // System sleeps here }