WT5001 Class Reference

API for the WT5001 Serial MP3 Module. More...

Detailed Description

• ID: wt5001
• Name: Serial MP3 Module
• Other Names: Grove Serial MP3 Player
• Category: sound
• Manufacturer: seeed
• Link: http://www.seeedstudio.com/wiki/Grove_%E2%80%93_Serial_MP3_Player
• Connection: uart

UPM support for the WT5001 Serial MP3 module. This was tested specifically with the Grove Serial MP3 module.

    // Instantiate a WT5001 serial MP3 player on uart 0.
    // This example was tested on the Grove Serial MP3 module.

    upm::WT5001 mp3(0);

    int cmd = -1;
    if (argc > 1)
        cmd = atoi(argv[1]);

    // make sure port is initialized properly.  9600 baud is the default.
    if (!mp3.setupTty(B9600)) {
        cerr << "Failed to setup tty port parameters" << endl;
        return 1;
    }

    switch (cmd) {
        case 0:
            mp3.stop();
            break;

        case 1:
            mp3.play(upm::WT5001::SD, 1);
            break;

        case 2:
            mp3.pause();
            break;

        case 3:
            mp3.next();
            break;

        case 4:
            mp3.previous();
            break;

        default:
            // nothing, just output usage, and info below
            printUsage(argv[0]);
            break;
    }

    // Example: set the date
    // mp3.setDate(2015, 1, 1);

    // Example: set the time
    // mp3.setTime(12, 30, 30);

    // print out some information
    uint8_t vol = 0;
    if (mp3.getVolume(&vol))
        cout << "The current volume is: " << int(vol) << endl;

    uint8_t ps = 0;
    if (mp3.getPlayState(&ps))
        cout << "The current play state is: " << int(ps) << endl;

    uint16_t numf = 0;
    if (mp3.getNumFiles(upm::WT5001::SD, &numf))
        cout << "The number of files on the SD card is: " << int(numf) << endl;

    uint16_t curf = 0;
    if (mp3.getCurrentFile(&curf))
        cout << "The current file is: " << int(curf) << endl;

    uint16_t year = 0;
    uint8_t month = 0, day = 0;
    if (mp3.getDate(&year, &month, &day))
        cout << "The device date is: " << int(month) << "/" << int(day) << "/" << int(year) << endl;

    uint8_t hour = 0, minute = 0, second = 0;
    if (mp3.getTime(&hour, &minute, &second))
        cout << "The device time is: " << int(hour) << ":" << int(minute) << ":" << int(second)
             << endl;

Public Types
enum	WT5001_OPCODE_T {   NONE = 0x00, PLAY_SD = 0xa0, PLAY_SPI = 0xa1, PLAY_UDISK = 0xa2,   PAUSE = 0xa3, STOP = 0xa4, NEXT = 0xa5, PREVIOUS = 0xa6,   SET_VOLUME = 0xa7, QUEUE = 0xa8, PLAY_MODE = 0xa9, COPY_SD2FLASH = 0xaa,   COPY_UDISK2FLASH = 0xab, INSERT_SONG = 0xac, SET_DATE = 0xb1, SET_TIME = 0xb2,   SET_ALARM = 0xb3, SET_ALARM_DUR = 0xb4, CLEAR_ALARM = 0xb5, CLEAR_ALARM_DUR = 0xb6,   READ_VOLUME = 0xc1, READ_PLAY_STATE = 0xc2, READ_SPI_NUMF = 0xc3, READ_SD_NUMF = 0xc4,   READ_UDISK_NUMF = 0xc5, READ_CUR_FNAME = 0xc6, READ_CF_CHAR = 0xc7, READ_DATE = 0xd1,   READ_TIME = 0xd2 }
enum	WT5001_PLAYMODE_T { NORMAL = 0x00, SINGLE_REPEAT = 0x01, ALL_REPEAT = 0x02, RANDOM = 0x03 }
enum	WT5001_PLAYSOURCE_T { SD, SPI, UDISK }

Public Member Functions
	WT5001 (int uart)
	~WT5001 ()
bool	dataAvailable (unsigned int millis)
int	readData (char *buffer, int len)
int	writeData (char *buffer, int len)
bool	setupTty (speed_t baud=B9600)
bool	checkResponse (WT5001_OPCODE_T opcode)
bool	play (WT5001_PLAYSOURCE_T psrc, uint16_t index)
bool	stop ()
bool	pause ()
bool	next ()
bool	previous ()
bool	setVolume (uint8_t vol)
bool	queue (uint16_t index)
bool	setPlayMode (WT5001_PLAYMODE_T pm)
bool	insert (uint16_t index)
bool	setDate (uint16_t year, uint8_t month, uint8_t day)
bool	setTime (uint8_t hour, uint8_t minute, uint8_t second)
bool	setAlarm (uint8_t hour, uint8_t minute, uint8_t second)
bool	clearAlarm ()
bool	getVolume (uint8_t *vol)
uint8_t	getVolume ()
bool	getPlayState (uint8_t *ps)
uint8_t	getPlayState ()
bool	getNumFiles (WT5001_PLAYSOURCE_T psrc, uint16_t *numf)
uint16_t	getNumFiles (WT5001_PLAYSOURCE_T psrc)
bool	getCurrentFile (uint16_t *curf)
uint16_t	getCurrentFile ()
bool	getDate (uint16_t *year, uint8_t *month, uint8_t *day)
bool	getTime (uint8_t *hour, uint8_t *minute, uint8_t *second)

Protected Member Functions
int	ttyFd ()

Constructor & Destructor Documentation

WT5001

(

int

uart

)

WT5001 constructor

Parameters

uart	Default UART to use (0 or 1)

~WT5001

(

)

WT5001 destructor

Member Function Documentation

bool dataAvailable

(

unsigned int

millis

)

Checks to see if there is data available for reading

Parameters

millis

Number of milliseconds to wait; 0 means no waiting

Returns

True if there is data available for reading

int readData	(	char *	buffer,
		int	len
	)

Reads any available data in a user-supplied buffer. Note: the call blocks until data is available to be read. Use dataAvailable() to determine whether there is data available beforehand, to avoid blocking.

Parameters

buffer	Buffer to hold the data read
len	Length of the buffer

Returns

Number of bytes read

int writeData	(	char *	buffer,
		int	len
	)

Writes the data in the buffer to the device

Parameters

buffer	Buffer to hold the data read
len	Length of the buffer

Returns

Number of bytes written

bool setupTty

(

speed_t

baud = B9600

)

Sets up proper tty I/O modes and the baud rate. The default baud rate is 9,600 (B9600).

Parameters

baud	Desired baud rate.

Returns

True if successful

bool checkResponse

(

WT5001_OPCODE_T

opcode

)

Gets a command response and returns its validity

Parameters

opcode

Opcode to verify

Returns

True if successful

bool play	(	WT5001_PLAYSOURCE_T	psrc,
		uint16_t	index
	)

Plays a file from a source

Parameters

psrc	Play source (SD, UDISK, SPI)
index	File number to play

Returns

True if successful

bool stop

(

)

Stops playing

Returns

True if successful

bool pause

(

)

Pauses the playback or resumes it if already paused

Returns

True if successful

bool next

(

)

Moves to the next track

Returns

True if successful

bool previous

(

)

Moves to the previous track

Returns

True if successful

bool setVolume

(

uint8_t

vol

)

Sets the volume. Valid range is 0-31. 0 means mute.

Returns

True if successful

bool queue

(

uint16_t

index

)

Queues a track to play next, when the current song is finished

Parameters

index

File number to queue

Returns

True if successful

bool setPlayMode

(

WT5001_PLAYMODE_T

pm

)

Sets the playback mode

Parameters

pm	Play mode to enable

Returns

True if successful

bool insert

(

uint16_t

index

)

Inserts a track to play immediately, interrupting the current track. When the inserted track is finished, the interrupted track resumes where it was interrupted.

Parameters

index

File number to insert

Returns

True if successful

bool setDate	(	uint16_t	year,
		uint8_t	month,
		uint8_t	day
	)

Sets the date of the internal clock

Parameters

year	4-digit year
month	Month
day	Day

Returns

True if successful

bool setTime	(	uint8_t	hour,
		uint8_t	minute,
		uint8_t	second
	)

Sets the time of the internal clock

Parameters

hour	Hour
minute	Minute
second	Second

Returns

True if successful

bool setAlarm	(	uint8_t	hour,
		uint8_t	minute,
		uint8_t	second
	)

Sets the alarm

Parameters

hour	Hour
minute	Minute
second	Second

Returns

True if successful

bool clearAlarm

(

)

Clears any alarm that has been set

Returns

True if successful

bool getVolume

(

uint8_t *

vol

)

Gets the current volume

Parameters

vol

Volume

Returns

True if successful

uint8_t getVolume

(

)

Gets the current volume

Returns

Volume

Exceptions

std::runtime_error

if reading from the sensor failed

bool getPlayState

(

uint8_t *

ps

)

Gets the current play state: 1 = playing, 2 = stopped, 3 = paused

Parameters

ps	Play state

Returns

True if successful

uint8_t getPlayState

(

)

Gets the current play state: 1 = playing, 2 = stopped, 3 = paused

Returns

Play state

Exceptions

std::runtime_error

if reading from the sensor failed

bool getNumFiles	(	WT5001_PLAYSOURCE_T	psrc,
		uint16_t *	numf
	)

Gets the number of files present on the source device

Parameters

psrc	Storage source
numf	Number of files

Returns

True if successful

uint16_t getNumFiles

(

WT5001_PLAYSOURCE_T

psrc

)

Gets the number of files present on the source device

Parameters

psrc	Storage source

Returns

Number of files

Exceptions

std::runtime_error

if reading from the sensor failed

bool getCurrentFile

(

uint16_t *

curf

)

Gets the index of the current file

Parameters

curf	Index of the current file

Returns

True if successful

uint16_t getCurrentFile

(

)

Gets the index of the current file

Returns

Index of the curretn file

Exceptions

std::runtime_error

if reading from the sensor failed

bool getDate	(	uint16_t *	year,
		uint8_t *	month,
		uint8_t *	day
	)

Gets the device date

Parameters

year	4-digit year
month	Month
day	Day

Returns

True if successful

bool getTime	(	uint8_t *	hour,
		uint8_t *	minute,
		uint8_t *	second
	)

Gets the device time

Parameters

hour	Hour
minute	Minute
second	Second

Returns

True if successful

---

The documentation for this class was generated from the following files:

• src/wt5001/wt5001.hpp
• src/wt5001/wt5001.cxx