I am wanting to send a digital signal from one Arduino to another. The goal is for one Arduino send a HIGH signal to a pin on the receiving Arduino. While the pin is HIGH, do function
I initially successfully tested this by blinking the LED on pin 13 but then I tried to add the functionality I needed but I couldn't get the state to change of pin 12 to change.
The circuit is simple
GND <--> GND
pin 10 --> pin 12
I saw there is already a post with a similar title but it didn't help me.
Any ideas?
Host Arduino
#include <SPI.h>
#include <Adafruit_VS1053.h>
#include <SD.h>
#define BREAKOUT_RESET 9 // VS1053 reset pin (output)
#define BREAKOUT_CS 10 // VS1053 chip select pin (output)
#define BREAKOUT_DCS 8 // VS1053 Data/command select pin (output)
// These are the pins used for the music maker shield
#define SHIELD_RESET -1 // VS1053 reset pin (unused!)
#define SHIELD_CS 7 // VS1053 chip select pin (output)
#define SHIELD_DCS 6 // VS1053 Data/command select pin (output)
// These are common pins between breakout and shield
#define CARDCS 4 // Card chip select pin
#define DREQ 3 // VS1053 Data request, ideally an Interrupt pin
Adafruit_VS1053_FilePlayer musicPlayer = Adafruit_VS1053_FilePlayer(SHIELD_RESET, SHIELD_CS, SHIELD_DCS, DREQ, CARDCS);
//DIGITAL SIGNAL PIN
int pin = 10;
void setup() {
Serial.begin(9600);
if (! musicPlayer.begin()) { // initialise the music player
Serial.println(F("Couldn't find VS1053, do you have the right pins defined?"));
while (1);
}
Serial.println(F("VS1053 found"));
if (!SD.begin(CARDCS)) {
Serial.println(F("SD failed, or not present"));
while (1); // don't do anything more
}
// list files
printDirectory(SD.open("/"), 0);
// Set volume for left, right channels. lower numbers == louder volume!
musicPlayer.setVolume(20,20);
// Timer interrupts are not suggested, better to use DREQ interrupt!
//musicPlayer.useInterrupt(VS1053_FILEPLAYER_TIMER0_INT); // timer int
// If DREQ is on an interrupt pin (on uno, #2 or #3) we can do background
// audio playing
musicPlayer.useInterrupt(VS1053_FILEPLAYER_PIN_INT); // DREQ int
pinMode(pin, OUTPUT);}
void loop() {
digitalWrite(pin,LOW);
Serial.print(digitalRead(pin));
// Play one file, don't return until complete
Serial.println(F("Playing track 001"));
musicPlayer.playFullFile("track001.mp3");
// Play another file in the background, REQUIRES interrupts!
Serial.println(F("Playing track 002"));
musicPlayer.startPlayingFile("track002.mp3");
delay(100);
}
/// File listing helper
void printDirectory(File dir, int numTabs) {
while(true) {
File entry = dir.openNextFile();
if (! entry) {
// no more files
//Serial.println("**nomorefiles**");
break;
}
for (uint8_t i=0; i<numTabs; i++) {
Serial.print('\t');
}
Serial.print(entry.name());
if (entry.isDirectory()) {
Serial.println("/");
printDirectory(entry, numTabs+1);
} else {
// files have sizes, directories do not
Serial.print("\t\t");
Serial.println(entry.size(), DEC);
}
entry.close();
}
}
Slave Arduino
#include <SPI.h>
#include <Adafruit_VS1053.h>
#include <SD.h>
#define BREAKOUT_RESET 9 // VS1053 reset pin (output)
#define BREAKOUT_CS 10 // VS1053 chip select pin (output)
#define BREAKOUT_DCS 8 // VS1053 Data/command select pin (output)
// These are the pins used for the music maker shield
#define SHIELD_RESET -1 // VS1053 reset pin (unused!)
#define SHIELD_CS 7 // VS1053 chip select pin (output)
#define SHIELD_DCS 6 // VS1053 Data/command select pin (output)
// These are common pins between breakout and shield
#define CARDCS 4 // Card chip select pin
// DREQ should be an Int pin, see http://arduino.cc/en/Reference/attachInterrupt
#define DREQ 3 // VS1053 Data request, ideally an Interrupt pin
Adafruit_VS1053_FilePlayer musicPlayer = Adafruit_VS1053_FilePlayer(SHIELD_RESET, SHIELD_CS, SHIELD_DCS, DREQ, CARDCS);
//DIGITAL SIGNAL PIN
int inPin = 12 ;
int state;
void setup() {
Serial.begin(9600);
if (! musicPlayer.begin()) { // initialise the music player
Serial.println(F("Couldn't find VS1053, do you have the right pins defined?"));
while (1);
}
Serial.println(F("VS1053 found"));
if (!SD.begin(CARDCS)) {
Serial.println(F("SD failed, or not present"));
while (1); // don't do anything more
}
// list files
printDirectory(SD.open("/"), 0);
// Set volume for left, right channels. lower numbers == louder volume!
musicPlayer.setVolume(20,20);
// Timer interrupts are not suggested, better to use DREQ interrupt!
//musicPlayer.useInterrupt(VS1053_FILEPLAYER_TIMER0_INT); // timer int
// If DREQ is on an interrupt pin (on uno, #2 or #3) we can do background
// audio playing
musicPlayer.useInterrupt(VS1053_FILEPLAYER_PIN_INT); // DREQ int
pinMode(inPin, INPUT);
}
void loop() {
state = digitalRead(inPin);
Serial.println(digitalRead(state));
if(state == HIGH){
musicPlayer.playFullFile("track001.mp3");
Serial.println(F("Playing track 001"));
}
}
/// File listing helper
void printDirectory(File dir, int numTabs) {
while(true) {
File entry = dir.openNextFile();
if (! entry) {
// no more files
//Serial.println("**nomorefiles**");
break;
}
for (uint8_t i=0; i<numTabs; i++) {
Serial.print('\t');
}
Serial.print(entry.name());
if (entry.isDirectory()) {
Serial.println("/");
printDirectory(entry, numTabs+1);
} else {
// files have sizes, directories do not
Serial.print("\t\t");
Serial.println(entry.size(), DEC);
}
entry.close();
}
}