arduinoでAMラジオを鳴らす その2

#概要

arduinoでAMラジオを鳴らしてみた。
wemos d1で、やってみた。

#配線

D9に、アンテナ用に、リード線をつなぐ。


#サンプルコード

resetが、かかる。

```
volatile int v;

#define CLOCK	   (1000000/8)
#define UA		  	1
#define SILO		2
#define DO		  	3
#define DOSH		4
#define RE		  	5
#define RESH		6
#define MI		  	7
#define FA		  	8
#define FASH		9
#define SO		  	10
#define SOSH		11
#define LA		  	12
#define SIFL		13
#define SI		  	14
#define DOHI		15
#define DOHS		16
#define REHI		17
#define REHS		18
#define MIHI		19
#define FAHI		20
#define FAHS		21
#define END0		0x30
#define OFF0		0x31
#define T03		 	3
#define T06		 	6
#define T09		 	9
#define NOTE		32

byte musicData[200] = {
	DO, T03,
	FA, T03,
	FA, T09,
	FA, T03,
	MI, T03,
	RE, T03,
	DO, T03,
	RE, T09,
	DO, T03,
	DO, T03,
	UA, T03,
	DO, T03,
	RE, T06,
	RE, T03,
	RE, T03,
	RE, T03,
	FA, T03,
	RE, T03,
	MI, T06,
	UA, T03,
	OFF0, T03,
	UA, T03,
	DO, T03,
	RE, T06,
	RE, T03,
	FA, T03,
	SO, T06,
	FA, T03,
	MI, T03,
	FA, T06,
	MI, T03,
	RE, T03,
	RE, T06,
	DO, T03,
	RE, T06,
	RE, T03,
	RE, T03,
	LA, T03,
	FA, T03,
	LA, T03,
	SO, T09,
	OFF0, T03,
	DO, T03,
	FA, T09,
	FA, T03,
	FA, T03,
	MI, T03,
	RE, T03,
	DO, T03,
	RE, T09,
	DO, T03,
	DO, T03,
	UA, T06,
	DO, T03,
	RE, T03,
	RE, T06,
	RE, T03,
	RE, T03,
	FA, T03,
	RE, T03,
	MI, T03,
	UA, T06,
	OFF0, T03,
	UA, T03,
	DO, T03,
	RE, T06,
	RE, T03,
	FA, T03,
	SO, T06,
	FA, T03,
	MI, T03,
	FA, T06,
	MI, T03,
	RE, T03,
	RE, T06,
	DO, T03,
	RE, T06,
	RE, T03,
	RE, T03,
	LA, T03,
	FA, T03,
	LA, T03,
	SO, T09,
	END0, T03,
	END0, T03
};
void playTone(byte tone0, byte tempo) {
	int i,
		hz,
		itone;
	switch (tone0)
	{
	case UA:
		hz = 466 / NOTE;
		itone = ((int) (CLOCK / 466)) << 3;
	break;
	case SILO:
		hz = 493 / NOTE;
		itone = ((int) (CLOCK / 493)) << 3;
	break;
	case DO:
		hz = 523 / NOTE;
		itone = ((int) (CLOCK / 523)) << 3;
	break;
	case DOSH:
		hz = 554 / NOTE;
		itone = ((int) (CLOCK / 554)) << 3;
	break;
	case RE:
		hz = 587 / NOTE;
		itone = ((int) (CLOCK / 587)) << 3;
	break;
	case RESH:
		hz = 622 / NOTE;
		itone = ((int) (CLOCK / 622)) << 3;
	break;
	case MI:
		hz = 659 / NOTE;
		itone = ((int) (CLOCK / 659)) << 3;
	break;
	case FA:
		hz = 698 / NOTE;
		itone = ((int) (CLOCK / 698)) << 3;
	break;
	case FASH:
		hz = 739 / NOTE;
		itone = ((int) (CLOCK / 739)) << 3;
	break;
	case SO:
		hz = 783 / NOTE;
		itone = ((int) (CLOCK / 783)) << 3;
	break;
	case SOSH:
		hz = 830 / NOTE;
		itone = ((int) (CLOCK / 830)) << 3;
	break;
	case LA:
		hz = 880 / NOTE;
		itone = ((int) (CLOCK / 880)) << 3;
	break;
	case SIFL:
		hz = 932 / NOTE;
		itone = ((int) (CLOCK / 932)) << 3;
	break;
	case SI:
		hz = 987 / NOTE;
		itone = ((int) (CLOCK / 987)) << 3;
	break;
	case DOHI:
		hz = 1046 / NOTE;
		itone = ((int) (CLOCK / 1046)) << 3;
	break;
	case DOHS:
		hz = 1108 / NOTE;
		itone = ((int) (CLOCK / 1108)) << 3;
	break;
	case REHI:
		hz = 1174 / NOTE;
		itone = ((int) (CLOCK / 1174)) << 3;
	break;
	case REHS:
		hz = 1244 / NOTE;
		itone = ((int) (CLOCK / 1244)) << 3;
	break;
	case MIHI:
		hz = 1318 / NOTE;
		itone = ((int) (CLOCK / 1318)) << 3;
	break;
	case FAHI:
		hz = 1396 / NOTE;
		itone = ((int) (CLOCK / 1396)) << 3;
	break;
	case FAHS:
		hz = 1480 / NOTE;
		itone = ((int) (CLOCK / 1480)) << 3;
	break;
	default:
		hz = 880 / NOTE;
		itone = ((int) (CLOCK / 880)) << 3;
	break;
	}
	for ( ; tempo > 0; tempo--)
	{
		if ((tone0 == OFF0) || (tone0 == END0))
		{
			delayMicroseconds(NOTE * 1000);
		}
		else
		{
			for (i = 0; i < hz; i++)
			{
				pinMode(LED_BUILTIN, INPUT);
				delayMicroseconds(itone);
				pinMode(LED_BUILTIN, OUTPUT);
				delayMicroseconds(itone);
			}
		}
	}
	delayMicroseconds(50000);
}
void isr0(void) {
	if (v == 0)
	{
		GPOC = 1 << 2;
		v = 1;
	}
	else
	{
		GPOS = 1 << 2;
		v = 0;
	}
	timer0_write(ESP.getCycleCount() + 1000L);
}

void setup() {
	pinMode(LED_BUILTIN, OUTPUT);
	digitalWrite(LED_BUILTIN, HIGH);
	Serial.begin(9600);
	while (!Serial)
	{
		;
	}
	Serial.println("start");
	noInterrupts();
	timer0_isr_init();
	timer0_attachInterrupt(isr0);
	timer0_write(ESP.getCycleCount() + 4000L);
	interrupts();
	ESP.wdtDisable();
	Serial.println("ok0");
}
void loop() {
	int i;
	byte tone0,
		tempo;
	for (i = 0; i < 80; i++)
	{
		tone0 = musicData[i * 2];
		tempo = musicData[i * 2 + 1];
		playTone(tone0, tempo);
	}
  	//yield();
}





```

以上。