Thanks Awol
The code I am using to run the SRF05 is :
int duration; // Stores duratiuon of pulse in
int distance; // Stores distance
int srfPin = 3; // Pin for SRF05
void setup(){
Serial.begin(9600);
}
void loop(){
pinMode(srfPin, OUTPUT);
digitalWrite(srfPin, LOW); // Make sure pin is low before sending a short high to trigger ranging
delayMicroseconds(2);
digitalWrite(srfPin, HIGH); // Send a short 10 microsecond high burst on pin to start ranging
delayMicroseconds(10);
digitalWrite(srfPin, LOW); // Send pin low again before waiting for pulse back in
pinMode(srfPin, INPUT);
duration = pulseIn(srfPin, HIGH); // Reads echo pulse in from SRF05 in micro seconds
distance = duration/58; // Dividing this by 58 gives us a distance in cm
Serial.println(distance);
delay(50); // Wait before looping to do it again
}
I have also run the playback example code for my rmp3 shield and it is working.
I am trying to use the 'rmp3 trigger with delay code' as a starting point for my project:
I want to integrate the SRF05 to act as the trigger for the mp3 playback.
I have hacked these 2 pieces of code together, and added this in the loop:
if (distance < 20)
digitalWrite(INPUT_PIN, HIGH);
heres the mashed together code:
/******************************************
rMP3 Trigger with Time-Out Example
rMP3 Control Requirements
* Play songs in order when trigger is set.
* If trigger clears, start timer and stop
playback if timer runs out.
Assumptions
* When timer runs out, playback starts
at the beginning.
* Playback will continue if trigger re-sets
before timer runs out.
******************************************/
#include <RogueSD.h>
#include <RogueMP3.h>
#include <NewSoftSerial.h>
// 30 second timeout
#define TIMER_MAX 30000
#define INPUT_PIN 8
// Objects
NewSoftSerial rmp3_serial(6, 7);
RogueMP3 rmp3(rmp3_serial);
RogueSD filecommands(rmp3_serial);
// global variables
int duration; // Stores duratiuon of pulse in
int distance; // Stores distance
int srfPin = 3; // Pin for SRF05
int numberOfSongs;
int currentSong = 0;
boolean triggered = false;
boolean playing = false;
uint32_t triggerTimer = 0xffffffff - TIMER_MAX;
char filePath[96];
// consts
const char *directory = "/";
void setup()
{
pinMode(srfPin, OUTPUT);
digitalWrite(srfPin, LOW); // Make sure pin is low before sending a short high to trigger ranging
delayMicroseconds(2);
digitalWrite(srfPin, HIGH); // Send a short 10 microsecond high burst on pin to start ranging
delayMicroseconds(10);
digitalWrite(srfPin, LOW); // Send pin low again before waiting for pulse back in
pinMode(srfPin, INPUT);
duration = pulseIn(srfPin, HIGH); // Reads echo pulse in from SRF05 in micro seconds
distance = duration/58; // Dividing this by 58 gives us a distance in cm
Serial.println(distance);
delay(50);
pinMode(INPUT_PIN, INPUT);
digitalWrite(INPUT_PIN, HIGH);
Serial.begin(9600);
rmp3_serial.begin(9600);
// synchronize audio player
rmp3.sync();
rmp3.stop();
// synchronize file system controller
filecommands.sync();
Serial.println("rMP3 Synchronized.");
// get the number of songs available
strcpy(filePath, directory);
strcat(filePath, "/");
strcat(filePath, "*.mp3");
numberOfSongs = filecommands.filecount(filePath);
if (numberOfSongs < 0)
{
// rMP3 error
if (filecommands.LastErrorCode == 8)
Serial.println("No card inserted.");
else
{
Serial.print("rMP3 Error Code: ");
Serial.println(filecommands.LastErrorCode, HEX);
}
Serial.println("Reset required to continue.");
for (;;);
}
Serial.print(numberOfSongs, DEC);
Serial.println(" files available.");
// rewind directory
filecommands.opendir(directory);
Serial.println("Awaiting trigger.");
}
// Play next song, if we can
void playNextSong()
{
char filename[80];
if (playing == true)
{
if (filecommands.status() == 0)
{
// card is inserted and good to go
if (currentSong == 0)
{
// rewind directory
filecommands.opendir(directory);
}
if (currentSong < numberOfSongs)
{
// get the next song
filecommands.readdir(filename, "*.mp3");
rmp3.playfile(directory, filename);
Serial.print("Playing: ");
Serial.print(directory);
Serial.print('/');
Serial.println(filename);
currentSong++;
}
else
{
playing = false;
currentSong = 0;
}
}
else
{
if (filecommands.LastErrorCode == 8)
{
Serial.println("No card inserted.");
}
else
{
Serial.print("rMP3 Error Code: ");
Serial.println(filecommands.LastErrorCode, HEX);
}
Serial.println("Reset required to continue.");
for (;;);
}
}
}
// This is the function to check the input
boolean checkTrigger(void)
{
if (digitalRead(INPUT_PIN) == HIGH)
return true;
else
return false;
}
/******************************************
Main loop
******************************************/
void loop()
{
char rMP3Status = rmp3.getplaybackstatus();
if (distance < 20)
digitalWrite(INPUT_PIN, HIGH);
// First, check the trigger
if (checkTrigger())
{
if (triggered == false)
{
Serial.println("Trigger set.");
if (playing == false)
{
// Start from the top
playing = true;
currentSong = 0;
}
}
triggered = true;
}
else
{
if (triggered == true)
{
Serial.println("Trigger cleared.");
triggered = false;
triggerTimer = millis();
}
else
{
if ((millis() - triggerTimer) > TIMER_MAX)
{
if (playing == true)
{
playing = false;
Serial.println("Playback stopped.");
}
if (rMP3Status == 'P')
{
// stop playback
rmp3.stop();
}
}
}
}
if (triggered == true || ((millis() - triggerTimer) < TIMER_MAX))
{
if (rMP3Status != 'P')
playNextSong();
}
// Arbitrary delay
delay(250);
}
When I run it, the activity light on the rmp3 flashes 3 times quickly and goes off. In the serial monitor I see :
rpm3 synchronised
3 files available
Trigger set
Playing // Snake Awake.mp3
Playing // Track 2.mp3
Playing// Track3.mp3
These are the 3 tracks on my sd card. It seems to begin playing the track then skips instantly on to the next and so on until it stops.
I hear no audio.
Can anyone help ?
Many Thanks
Twogan