WIZnet
Playing MP3 with Music Shield and WIZwiki-W7500
Dependencies: FTPClient javakysSDFileSystem2 WIZnetInterface mbed
Prerequisite
This example is for playing MP3 file stored in SD card on WIZwiki-W7500 and updating MP3 files from server to SD card via FTP protocol.
To implement this function, you need a Platform board, network Interface board, MP3 decoder board and SD card. Below are what we used.
- WIZwiki-W7500 from WIZnet (Platform board and Ethernet I/F board)
- Music shield from Seeed Studio
- SD card
Hardware Configuration
WIZwiki-W7500 Pin map
SPI1 for SD Card
SPI1 on WIZwiki-W7100 is for reading from or writing to SD card and pins for SPI1 are PB_0, PB_1, PB_2 and PB_3.
SPI0 and other control pins for MP3 decoder
WIZwiki-W7500 communicates to MP3 decoder on Music Shield via SPI0 pins of which consists of PC_12, D11, D12 and D13.
And PC_13, PC_14 and PC-15 are used for DCS, DREQ and RST, respectively.
InterruptIn pins for 5-Way Navigation Switch
D3, D4, D5, D6 and D7 are connected to 5 way navigation switch on Music Shield.
When user pushes the switch to one way, a relevant pin is grounded so that he or she should make it set high at the beginning.
Software
SPI Initialization
//Declaration in VS1002.cpp
VS1002::VS1002(PinName mmosi, PinName mmiso, PinName ssck, PinName ccs, const char *name, PinName mosi, PinName miso, PinName sck, PinName cs, PinName rst, PinName dreq, PinName dcs)
: _DREQ(dreq), _RST(rst), _spi(mosi, miso, sck), _CS(cs), _DCS(dcs), _sd(mmosi, mmiso, ssck, ccs, name) {
}
//Initialization in main.cpp
VS1002 mp3(PB_3, PB_2, PB_1, PB_0,"sdc",D11, D12 ,D13, PC_12, PC_15, PC_14, PC_13);
Mapping 5-Way Navigation Switch into InterruptIn pins
main.cpp
InterruptIn K_VU(D3); // Volume UP Key InterruptIn K_VD(D7); // Volume Down Key InterruptIn K_FW(D4); // Foward Key InterruptIn K_BW(D6); // Backward Key InterruptIn K_ONOFF(D5); //Play/Resume or Pause Key
Additional codes due to mbed library bug of WIZwiki-W7500
main.cpp
//Operating Clock Frequency Set *(volatile uint32_t *)(0x41001014) = 0x0060100; //Set all InterruptIn pins to Internal PullUp *(volatile uint32_t *)(0x41003000) = 0x00000002; //D6 *(volatile uint32_t *)(0x41003004) = 0x00000002; //D5 *(volatile uint32_t *)(0x41003008) = 0x00000002; //D4 *(volatile uint32_t *)(0x41003080) = 0x00000002; //D3 *(volatile uint32_t *)(0x41003098) = 0x00000002; //D7
Caution
This example can play only MP3 files with up to 192KHz sample rate//
Diff: VS1002.h
- Revision:
- 1:fc4e0c572992
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/VS1002.h Thu Mar 30 06:29:49 2017 +0000
@@ -0,0 +1,74 @@
+#ifndef VS1002_H
+#define VS1002_H
+
+#include "mbed.h"
+#include "SDFileSystem.h"
+#include "string"
+#include "string.h"
+
+
+//SCI_MODE register bits as of p.26 of the datasheet
+#define SM_DIFF 0x0001
+#define SM_SETTOZERO 0x0002
+#define SM_RESET 0x0004
+#define SM_OUTOFWAV 0x0008
+#define SM_PDOWN 0x0010
+#define SM_TESTS 0x0020
+#define SM_STREAM 0x0040
+#define SM_PLUSV 0x0080
+#define SM_DACT 0x0100
+#define SM_SDIORD 0x0200
+#define SM_SDISHARE 0x0400
+#define SM_SDINEW 0x0800
+#define SM_ADPCM 0x1000
+#define SM_ADPCM_HP 0x2000
+
+extern int new_song_number;
+extern int volume_set;
+extern bool pause;
+extern bool mute;
+extern char * song_name[9];
+
+
+class VS1002 {
+
+public:
+
+ VS1002(PinName mmosi, PinName mmiso, PinName ssck, PinName ccs, const char *name, PinName mosi, PinName miso, PinName sck, PinName cs, PinName rst, PinName dreq, PinName dcs);
+
+ void cs_low(void);
+ void cs_high(void);
+ void dcs_low(void);
+ void dcs_high(void);
+ void sci_en(void);
+ void sci_dis(void);
+ void sdi_en(void);
+ void sdi_dis(void);
+
+ void sci_initialise(void);
+ void sdi_initialise(void);
+ void reset(void);
+ void power_down(void);
+
+ void sci_write(unsigned char, unsigned short int);
+ void sdi_write(unsigned char);
+ unsigned short int read(unsigned short int);
+ void sine_test_activate(unsigned char);
+ void volume(signed int,signed int);
+ void sine_test_deactivate(void);
+ void play_song(int);
+
+ int num_of_files;
+
+ DigitalIn _DREQ;
+ DigitalOut _RST;
+
+protected:
+
+ SPI _spi;
+ DigitalOut _CS;
+ DigitalOut _DCS;
+ SDFileSystem _sd;
+
+};
+#endif
\ No newline at end of file