Hi,
I bought the same board recently and found a solution to your problem. (I originally came to this page to see if anyone can solve my same problem.)
Basically, I modified a source linked from Sparkfun. I had to modify it because the code is from April 2011 and I am using Arduino 1.0*.
Not sure if it matters in your case, but I used a UNO board where SPI pins (MOSI/MISO/SCK) are defaulted to (PIN 11/12/13).
For simplicity, I didn't change that.
Also, the MP3 board I bought does't have the jumper on LINE in. It looks identical to yours otherwise.
This probably does't make a difference.
For reference, on UNO board, Pin 10 must be set to OUTPUT even if you reassign MOSI/MISO/SCK pins to non-default values. Otherwise, SPI won't work.
One more point regarding this chip/board is that they have 2 chip select pins (CS/DCS).
This means only 1 CS pin should be set to LOW at all times.
The realization of this made me drop another sample code I was using, where mp3 clip is played directly from a small defined array values.
In that particular sample, they are not taking care of the CS pins for other SPI devices (SD/TFT, etc).
Source code is below.
-----------------------
/*
Modified from
//////////////
//
http://dlnmh9ip6v2uc.cloudfront.net/...le_Control.pde
// linked from
https://www.sparkfun.com/products/10628
// -> "MP3 Player Control Example"
//
// 4-28-2011
// Spark Fun Electronics 2011
// Nathan Seidle
//////////////
*/
#include <SPI.h>
#include <SD.h>
char trackName[] = "tomorrow.mp3";
int trackNumber = 1;
char errorMsg[100]; //This is a generic array used for sprintf of error messages
#define TRUE 0
#define FALSE 1
//MP3 Player Shield pin mapping. See the schematic
#define MP3_XCS 9 //Control Chip Select Pin (for accessing SPI Control/Status registers)
#define MP3_XDCS 6 //Data Chip Select / BSYNC Pin
#define MP3_DREQ 8 //Data Request Pin: Player asks for more data
#define MP3_RESET 7 //Reset is active low
#define SD_CS 4 // Chip select line for SD card
//VS10xx SCI Registers
#define SCI_MODE 0x00
#define SCI_STATUS 0x01
#define SCI_BASS 0x02
#define SCI_CLOCKF 0x03
#define SCI_DECODE_TIME 0x04
#define SCI_AUDATA 0x05
#define SCI_WRAM 0x06
#define SCI_WRAMADDR 0x07
#define SCI_HDAT0 0x08
#define SCI_HDAT1 0x09
#define SCI_AIADDR 0x0A
#define SCI_VOL 0x0B
#define SCI_AICTRL0 0x0C
#define SCI_AICTRL1 0x0D
#define SCI_AICTRL2 0x0E
#define SCI_AICTRL3 0x0F
void setup() {
pinMode(MP3_DREQ, INPUT);
pinMode(MP3_XCS, OUTPUT);
pinMode(MP3_XDCS, OUTPUT);
pinMode(MP3_RESET, OUTPUT);
digitalWrite(MP3_XCS, HIGH); //Deselect Control
digitalWrite(MP3_XDCS, HIGH); //Deselect Data
digitalWrite(MP3_RESET, LOW); //Put VS1053 into hardware reset
Serial.begin(9600); //Use serial for debugging
Serial.println("MP3 Testing");
pinMode(10, OUTPUT); //Pin 10 must be set as an output for the SD communication to work.
Serial.print("Initializing SD card...");
if (!SD.begin(SD_CS)) {
Serial.println("failed!");
return;
}
Serial.println("OK!");
//From page 12 of datasheet, max SCI reads are CLKI/7. Input clock is 12.288MHz.
//Internal clock multiplier is 1.0x after power up.
//Therefore, max SPI speed is 1.75MHz. We will use 1MHz to be safe.
SPI.setClockDivider(SPI_CLOCK_DIV16); //Set SPI bus speed to 1MHz (16MHz / 16 = 1MHz)
SPI.transfer(0xFF); //Throw a dummy byte at the bus
//Initialize VS1053 chip
delay(10);
digitalWrite(MP3_RESET, HIGH); //Bring up VS1053
//delay(10); //We don't need this delay because any register changes will check for a high DREQ
//Mp3SetVolume(20, 20); //Set initial volume (20 = -10dB) LOUD
Mp3SetVolume(40, 40); //Set initial volume (20 = -10dB) Manageable
//Mp3SetVolume(80, 80); //Set initial volume (20 = -10dB) More quiet
//Let's check the status of the VS1053
int MP3Mode = Mp3ReadRegister(SCI_MODE);
int MP3Status = Mp3ReadRegister(SCI_STATUS);
int MP3Clock = Mp3ReadRegister(SCI_CLOCKF);
Serial.print("SCI_Mode (0x4800) = 0x");
Serial.println(MP3Mode, HEX);
Serial.print("SCI_Status (0x48) = 0x");
Serial.println(MP3Status, HEX);
int vsVersion = (MP3Status >> 4) & 0x000F; //Mask out only the four version bits
Serial.print("VS Version (VS1053 is 4) = ");
Serial.println(vsVersion, DEC); //The 1053B should respond with 4. VS1001 = 0, VS1011 = 1, VS1002 = 2, VS1003 = 3
Serial.print("SCI_ClockF = 0x");
Serial.println(MP3Clock, HEX);
//Now that we have the VS1053 up and running, increase the internal clock multiplier and up our SPI rate
Mp3WriteRegister(SCI_CLOCKF, 0x60, 0x00); //Set multiplier to 3.0x
//From page 12 of datasheet, max SCI reads are CLKI/7. Input clock is 12.288MHz.
//Internal clock multiplier is now 3x.
//Therefore, max SPI speed is 5MHz. 4MHz will be safe.
SPI.setClockDivider(SPI_CLOCK_DIV4); //Set SPI bus speed to 4MHz (16MHz / 4 = 4MHz)
MP3Clock = Mp3ReadRegister(SCI_CLOCKF);
Serial.print("SCI_ClockF = 0x");
Serial.println(MP3Clock, HEX);
//MP3 IC setup complete
}
void loop(){
playMP3(trackName);
trackNumber++; //When we loop, advance to next track!
if(trackNumber > 1) {
Serial.println("Whoa there cowboy!");
while(1);
}
}
//PlayMP3 pulls 32 byte chunks from the SD card and throws them at the VS1053
//We monitor the DREQ (data request pin). If it goes low then we determine if
//we need new data or not. If yes, pull new from SD card. Then throw the data
//at the VS1053 until it is full.
void playMP3(char* fileName) {
File mp3File;
if ((mp3File = SD.open(fileName)) == NULL) {
Serial.print("File not found");
return;
}
Serial.println("Track open");
uint8_t mp3DataBuffer[32]; //Buffer of 32 bytes. VS1053 can take 32 bytes at a go.
//track.read(mp3DataBuffer, sizeof(mp3DataBuffer)); //Read the first 32 bytes of the song
int need_data = TRUE;
long replenish_time = millis();
Serial.println("Start MP3 decoding");
while(1) {
while(!digitalRead(MP3_DREQ)) {
//DREQ is low while the receive buffer is full
//You can do something else here, the buffer of the MP3 is full and happy.
//Maybe set the volume or test to see how much we can delay before we hear audible glitches
//If the MP3 IC is happy, but we need to read new data from the SD, now is a great time to do so
if(need_data == TRUE) {
if(!mp3File.read(mp3DataBuffer, sizeof(mp3DataBuffer))) { //Try reading 32 new bytes of the song
//Oh no! There is no data left to read!
//Time to exit
break;
}
need_data = FALSE;
}
//Serial.println("."); //Print a character to show we are doing nothing
//This is here to show how much time is spent transferring new bytes to the VS1053 buffer. Relies on replenish_time below.
Serial.print("Time to replenish buffer: ");
Serial.print(millis() - replenish_time, DEC);
Serial.print("ms");
//Test to see just how much we can do before the audio starts to glitch
long start_time = millis();
//delay(150); //Do NOTHING - audible glitches
//delay(135); //Do NOTHING - audible glitches
//delay(120); //Do NOTHING - barely audible glitches
delay(100); //Do NOTHING - sounds fine
Serial.print(" Idle time: ");
Serial.print(millis() - start_time, DEC);
Serial.println("ms");
//Look at that! We can actually do quite a lot without the audio glitching
//Now that we've completely emptied the VS1053 buffer (2048 bytes) let's see how much
//time the VS1053 keeps the DREQ line high, indicating it needs to be fed
replenish_time = millis();
}
if(need_data == TRUE){ //This is here in case we haven't had any free time to load new data
if(!mp3File.read(mp3DataBuffer, sizeof(mp3DataBuffer))) { //Go out to SD card and try reading 32 new bytes of the song
//Oh no! There is no data left to read!
//Time to exit
break;
}
need_data = FALSE;
}
//Once DREQ is released (high) we now feed 32 bytes of data to the VS1053 from our SD read buffer
digitalWrite(MP3_XDCS, LOW); //Select Data
for(int y = 0 ; y < sizeof(mp3DataBuffer) ; y++) {
SPI.transfer(mp3DataBuffer[y]); // Send SPI byte
}
digitalWrite(MP3_XDCS, HIGH); //Deselect Data
need_data = TRUE; //We've just dumped 32 bytes into VS1053 so our SD read buffer is empty. Set flag so we go get more data
}
while(!digitalRead(MP3_DREQ)) ; //Wait for DREQ to go high indicating transfer is complete
digitalWrite(MP3_XDCS, HIGH); //Deselect Data
mp3File.close(); //Close out this track
sprintf(errorMsg, "Track %s done!", fileName);
Serial.println(errorMsg);
}
//Write to VS10xx register
//SCI: Data transfers are always 16bit. When a new SCI operation comes in
//DREQ goes low. We then have to wait for DREQ to go high again.
//XCS should be low for the full duration of operation.
void Mp3WriteRegister(unsigned char addressbyte, unsigned char highbyte, unsigned char lowbyte){
while(!digitalRead(MP3_DREQ)) ; //Wait for DREQ to go high indicating IC is available
digitalWrite(MP3_XCS, LOW); //Select control
//SCI consists of instruction byte, address byte, and 16-bit data word.
SPI.transfer(0x02); //Write instruction
SPI.transfer(addressbyte);
SPI.transfer(highbyte);
SPI.transfer(lowbyte);
while(!digitalRead(MP3_DREQ)) ; //Wait for DREQ to go high indicating command is complete
digitalWrite(MP3_XCS, HIGH); //Deselect Control
}
//Read the 16-bit value of a VS10xx register
unsigned int Mp3ReadRegister (unsigned char addressbyte){
while(!digitalRead(MP3_DREQ)) ; //Wait for DREQ to go high indicating IC is available
digitalWrite(MP3_XCS, LOW); //Select control
//SCI consists of instruction byte, address byte, and 16-bit data word.
SPI.transfer(0x03); //Read instruction
SPI.transfer(addressbyte);
char response1 = SPI.transfer(0xFF); //Read the first byte
while(!digitalRead(MP3_DREQ)) ; //Wait for DREQ to go high indicating command is complete
char response2 = SPI.transfer(0xFF); //Read the second byte
while(!digitalRead(MP3_DREQ)) ; //Wait for DREQ to go high indicating command is complete
digitalWrite(MP3_XCS, HIGH); //Deselect Control
int resultvalue = response1 << 8;
resultvalue |= response2;
return resultvalue;
}
//Set VS10xx Volume Register
void Mp3SetVolume(unsigned char leftchannel, unsigned char rightchannel){
Mp3WriteRegister(SCI_VOL, leftchannel, rightchannel);
}
Reply With Quote
Originally Posted by drMams
