我在arduino.stackexchange上发布了此问题,但我认为此问题仅与(C)语言有关。
我有一辆汽车,并且正在尝试使用带有Arduino的红外(IR)遥控器播放歌曲时以某种方式关闭汽车电源。我决定使用蜂鸣器播放一首歌曲(SuperMario),当我按下Power ON按钮时,该歌曲可以正常播放。
问题是当我按下“关闭电源”时,我必须等到歌曲结束才能关闭汽车电源。
我当时在想也许我需要线程之类的东西,但是我不确定,或者也许有更好的方法来解决这个问题。
这是一个演示程序:
#include "IRremote.h"
#define NOTE_B0 31
#define NOTE_C1 33
#define NOTE_CS1 35
#define NOTE_D1 37
#define NOTE_DS1 39
#define NOTE_E1 41
#define NOTE_F1 44
#define NOTE_FS1 46
#define NOTE_G1 49
#define NOTE_GS1 52
#define NOTE_A1 55
#define NOTE_AS1 58
#define NOTE_B1 62
#define NOTE_C2 65
#define NOTE_CS2 69
#define NOTE_D2 73
#define NOTE_DS2 78
#define NOTE_E2 82
#define NOTE_F2 87
#define NOTE_FS2 93
#define NOTE_G2 98
#define NOTE_GS2 104
#define NOTE_A2 110
#define NOTE_AS2 117
#define NOTE_B2 123
#define NOTE_C3 131
#define NOTE_CS3 139
#define NOTE_D3 147
#define NOTE_DS3 156
#define NOTE_E3 165
#define NOTE_F3 175
#define NOTE_FS3 185
#define NOTE_G3 196
#define NOTE_GS3 208
#define NOTE_A3 220
#define NOTE_AS3 233
#define NOTE_B3 247
#define NOTE_C4 262
#define NOTE_CS4 277
#define NOTE_D4 294
#define NOTE_DS4 311
#define NOTE_E4 330
#define NOTE_F4 349
#define NOTE_FS4 370
#define NOTE_G4 392
#define NOTE_GS4 415
#define NOTE_A4 440
#define NOTE_AS4 466
#define NOTE_B4 494
#define NOTE_C5 523
#define NOTE_CS5 554
#define NOTE_D5 587
#define NOTE_DS5 622
#define NOTE_E5 659
#define NOTE_F5 698
#define NOTE_FS5 740
#define NOTE_G5 784
#define NOTE_GS5 831
#define NOTE_A5 880
#define NOTE_AS5 932
#define NOTE_B5 988
#define NOTE_C6 1047
#define NOTE_CS6 1109
#define NOTE_D6 1175
#define NOTE_DS6 1245
#define NOTE_E6 1319
#define NOTE_F6 1397
#define NOTE_FS6 1480
#define NOTE_G6 1568
#define NOTE_GS6 1661
#define NOTE_A6 1760
#define NOTE_AS6 1865
#define NOTE_B6 1976
#define NOTE_C7 2093
#define NOTE_CS7 2217
#define NOTE_D7 2349
#define NOTE_DS7 2489
#define NOTE_E7 2637
#define NOTE_F7 2794
#define NOTE_FS7 2960
#define NOTE_G7 3136
#define NOTE_GS7 3322
#define NOTE_A7 3520
#define NOTE_AS7 3729
#define NOTE_B7 3951
#define NOTE_C8 4186
#define NOTE_CS8 4435
#define NOTE_D8 4699
#define NOTE_DS8 4978
#define powerLedRed 2
#define powerLedGreen 3
#define receiver 5
#define buzzer 7
void translateIR( void );
void powerON( void );;
void powerOFF( void );
void swap( int *x, int *y );
void playSuperMario( void );
void buzz( int targetPin, long frequency, long length );
int power = 2;
int switchOFF = 0;
int switchON = 1;
int melody[] = {
NOTE_E7, NOTE_E7, 0, NOTE_E7, 0, NOTE_C7, NOTE_E7, 0,
NOTE_G7, 0, 0, 0, NOTE_G6, 0, 0, 0,
NOTE_C7, 0, 0, NOTE_G6, 0, 0, NOTE_E6, 0, 0,
NOTE_A6, 0, NOTE_B6, 0, NOTE_AS6, NOTE_A6, 0,
NOTE_G6, NOTE_E7, NOTE_G7, NOTE_A7, 0, NOTE_F7, NOTE_G7, 0,
NOTE_E7, 0, NOTE_C7, NOTE_D7, NOTE_B6, 0, 0,
NOTE_C7, 0, 0, NOTE_G6, 0, 0, NOTE_E6, 0, 0,
NOTE_A6, 0, NOTE_B6, 0, NOTE_AS6, NOTE_A6, 0,
NOTE_G6, NOTE_E7, NOTE_G7, NOTE_A7, 0, NOTE_F7, NOTE_G7, 0,
NOTE_E7, 0, NOTE_C7, NOTE_D7, NOTE_B6, 0, 0
};
int tempo[] = {
12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
9, 9, 9, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
9, 9, 9, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
};
int underworld_melody[] = {
NOTE_C4, NOTE_C5, NOTE_A3, NOTE_A4, NOTE_AS3, NOTE_AS4, 0, 0,
NOTE_C4, NOTE_C5, NOTE_A3, NOTE_A4, NOTE_AS3, NOTE_AS4, 0, 0,
NOTE_F3, NOTE_F4, NOTE_D3, NOTE_D4, NOTE_DS3, NOTE_DS4, 0, 0,
NOTE_F3, NOTE_F4, NOTE_D3, NOTE_D4, NOTE_DS3, NOTE_DS4, 0, 0,
NOTE_DS4, NOTE_CS4, NOTE_D4, NOTE_CS4, NOTE_DS4, NOTE_DS4, NOTE_GS3,
NOTE_G3, NOTE_CS4, NOTE_C4, NOTE_FS4, NOTE_F4, NOTE_E3, NOTE_AS4, NOTE_A4,
NOTE_GS4, NOTE_DS4, NOTE_B3, NOTE_AS3, NOTE_A3, NOTE_GS3, 0, 0, 0
};
int underworld_tempo[] = {
12, 12, 12, 12, 12, 12, 6, 3,
12, 12, 12, 12, 12, 12, 6, 3,
12, 12, 12, 12, 12, 12, 6, 3,
12, 12, 12, 12, 12, 12, 6,
6, 18, 18, 18, 6, 6, 6, 6, 6, 6,
18, 18, 18, 18, 18, 18, 10, 10, 10,
10, 10, 10, 3, 3, 3
};
IRrecv irrecv(receiver);
decode_results results;
void setup( void )
{
pinMode(buzzer, OUTPUT);
pinMode(powerLedGreen, OUTPUT);
pinMode(powerLedRed, OUTPUT);
Serial.begin(9600);
Serial.println("IR Receiver Button Decode");
irrecv.enableIRIn();
}
void loop( void )
{
if ( power == 2 ) {
powerOFF();
}
if (irrecv.decode(&results)) {
translateIR();
irrecv.resume();
}
}
void playSuperMario( void ) {
Serial.println(" 'Mario Theme'");
int size = sizeof(melody) / sizeof(int);
for (int thisNote = 0; thisNote < size; thisNote++) {
int noteDuration = 1000 / tempo[thisNote];
buzz(buzzer, melody[thisNote], noteDuration);
int pauseBetweenNotes = noteDuration * 1.30;
delay(pauseBetweenNotes);
buzz(buzzer, 0, noteDuration);
}
}
void buzz( int targetPin, long frequency, long length ) {
digitalWrite(13, HIGH);
long delayValue = 1000000 / frequency / 2; // calculate the delay value between transitions
long numCycles = frequency * length / 1000; // calculate the number of cycles for proper timing
for (long i = 0; i < numCycles; i++) { // for the calculated length of time...
digitalWrite(targetPin, HIGH); // write the buzzer pin high to push out the diaphram
delayMicroseconds(delayValue); // wait for the calculated delay value
digitalWrite(targetPin, LOW); // write the buzzer pin low to pull back the diaphram
delayMicroseconds(delayValue); // wait again or the calculated delay value
}
digitalWrite(13, LOW);
}
void translateIR( void ) {
switch (results.value) {
case 0xFF02FD:
Serial.println(" -OK-");
swap(&switchON, &switchOFF);
if (switchON == 0 )
{
powerON();
playSuperMario();
}
else
{
powerOFF();
}
break;
default:
Serial.println(" other button ");
power = 0;
}
//delay(500);
}
void powerOFF( void ) {
digitalWrite(powerLedRed, HIGH);
digitalWrite(powerLedGreen, LOW);
power = 0;
}
void powerON( void ) {
digitalWrite(powerLedRed, LOW);
digitalWrite(powerLedGreen, HIGH);
}
void swap( int *x, int *y ) {
if (*x != *y) {
*x ^= *y;
*y ^= *x;
*x ^= *y;
}
}
在
translateIR
函数中,我有这个:void translateIR( void ) {
switch (results.value) {
case 0xFF02FD:
Serial.println(" -OK-");
swap(&switchON, &switchOFF);
if (switchON == 0 )
{
powerON();
playSuperMario();
}
else
{
powerOFF();
}
break;
default:
Serial.println(" other button ");
power = 0;
}
//delay(500);
}
在这里,这两个函数都称为
powerON()
和playSuperMario();
,因此在播放乐曲期间,我需要某种方式关闭汽车电源。这是VIDEO Demo。
如何解决?
最佳答案
忘了线程,这是我们在这里谈论的微控制器。我建议基于计时器的中断可能每100毫秒左右触发一次。人耳的时间很短,但是中断之间的时间却很长,微指令每秒执行1600万条指令。因此,在中断中,您检查是否已按下按钮。如果已设置,请设置一个在主循环中检查的变量,如果已设置,则关闭旋律。
最大等待时间= 100毫秒加上几个时钟周期。
我不会为您编写代码。但我会告诉你Google做什么。首先,您需要阅读特定Arduino板上的微控制器的数据表。从Atmel下载。然后研究如何在CTC模式下设置计时器,如何设置预分频器,如何在您选择的编译器IDE中为其编写中断代码,如何在中断期间检测按钮按下,如何设置中断中断主体中的volatile
变量,以及如何在主循环中检查该变量并中断旋律。嵌入式编程方面有很多东西要学习,而且它们都可以在互联网上找到。从数据表开始。 ;)