WIZnet / Mbed 2 deprecated MP3Decoding_VS1002_WIZwiki-W7500

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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

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: SSD1306.h

Revision:
1:fc4e0c572992
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SSD1306.h	Thu Mar 30 06:29:49 2017 +0000
@@ -0,0 +1,209 @@
+#include "data.h"
+#define addr    (0x78)
+
+#if defined(TARGET_WIZwiki_W7500)
+#define SDA                  PA_10
+#define SCL                  PA_9
+#endif
+
+I2C i2c(SDA, SCL);
+
+void send_cmd(uint8_t cmd){
+     char c[2] ={0x00,cmd};
+     
+       i2c.write(addr,c,2,1);
+     
+}
+
+void send_data(uint8_t data){
+    char c[2] = {0x40,data};
+    i2c.write(addr,c,2,1);
+    
+}
+
+void init(void)
+{
+    wait_ms(5); // TBD
+       
+    send_cmd(0xae); // display off
+    send_cmd(0xd5); // display divide ratio/osc. freq. ratio
+    send_cmd(0x80);
+    send_cmd(0xa8); // multiplex ation mode: 63
+    send_cmd(0x3f);
+    send_cmd(0xd3); // set display offset
+    send_cmd(0x00);
+    send_cmd(0x40); // set display start line
+    send_cmd(0x8d); // set display offset
+    send_cmd(0x14);
+    send_cmd(0xa1); // segment remap
+    send_cmd(0xc8); // set COM output scan direction
+    send_cmd(0xda); // common pads hardware: alternative
+    send_cmd(0x12);
+    send_cmd(0x81); // contrast control
+    send_cmd(0xcf);
+    send_cmd(0xd9); // set pre-charge period
+    send_cmd(0xf1);
+    send_cmd(0xdb); // VCOM deselect level mode
+    send_cmd(0x40); // set vcomh = 0.83 * VCC
+    send_cmd(0xa4); // set entire display on/off
+    send_cmd(0xa6); // set normal display
+    send_cmd(0xaf); // set display on
+}
+
+// set position (x, 8*y)
+void locate(int x, int y){
+    send_cmd(0xb0+y);
+    send_cmd(((x&0xf0)>>4)|0x10);
+    send_cmd((x&0x0f)|0x01);
+}
+
+void cls(void){
+    int x, y;
+    for(y = 0; y < 8; y++){
+        locate(0, y);
+        for(x = 0; x < 128; x++) send_data(0x00);
+    }
+}
+
+
+
+ void OLED_ShowStr(unsigned char x, unsigned char y, char ch[], unsigned char TextSize)
+{
+    unsigned char c = 0,i = 0,j = 0;
+    switch(TextSize)
+    {
+        case 1:
+        {
+            while(ch[j] != '\0')
+            {
+                c = ch[j] - 32;
+                if(x > 126)
+                {
+                    x = 0;
+                    y++;
+                }
+                locate(x,y);
+                for(i=0;i<6;i++)
+                    send_data(F6x8[c][i]);
+                x += 6;
+                j++;
+            }
+        }break;
+        case 2:
+        {
+            while(ch[j] != '\0')
+            {
+                c = ch[j] - 32;
+                if(x > 120)
+                {
+                    x = 0;
+                    y++;
+                }
+                locate(x,y);
+                for(i=0;i<8;i++)
+                    send_data(F8X16[c*16+i]);
+                locate(x,y+1);
+                for(i=0;i<8;i++)
+                    send_data(F8X16[c*16+i+8]);
+                x += 8;
+                j++;
+            }
+        }break;
+    }
+}
+void OLED_DrawBMP(unsigned char x0,
+                           unsigned char y0,unsigned char x1,
+                           unsigned char y1,unsigned char BMP[])
+{
+    unsigned int j=0;
+    unsigned char x,y;
+
+  if(y1%8==0)
+        y = y1/8;
+  else
+        y = y1/8 + 1;
+    for(y=y0;y<y1;y++)
+    {
+        locate(x0,y);
+    for(x=x0;x<x1;x++)
+        {
+            send_data(BMP[j++]);
+        }
+    }
+}
+//==========================================================//
+// Prints a display big number (96 bytes) in coordinates X Y,
+// being multiples of 8. This means we have 16 COLS (0-15)
+// and 8 ROWS (0-7).
+void printBigNumber(unsigned char s, int x, int y)
+{
+    locate(x,y);
+    int salto=0;
+    for(int i=0; i<96; i++) {
+        if(s == ' ') {
+            send_data(0);
+        } else
+            send_data(bigNumbers[s-0x30][i]);
+
+        if(salto == 23) {
+            salto = 0;
+            x++;
+            locate(x,y);
+        } else {
+            salto++;
+        }
+    }
+}
+void printBigTime(char *s)
+{
+
+    int y=0;
+    int lon = strlen(s);
+    if(lon == 6) {
+        y = 0;
+    } else if (lon == 5) {
+        y = 3;
+    } else if (lon == 4) {
+        y = 6;
+    }
+      else if(lon == 3) {
+        y = 9;
+    } else if (lon == 2) {
+        y = 12;
+    } else if (lon == 1) {
+        y = 15;
+    }
+
+    int x = 2;
+    while(*s) {
+        printBigNumber(*s, x, y);
+
+        y+=3;
+        x=2;
+        locate(x,y);
+        *s++;
+    }
+}
+void LED_P23x32Str(unsigned char x, unsigned char y, char ch[])
+{
+  unsigned char c = 0, i = 0, j = 0, k = 0;
+  while (ch[j] != '\0')
+  {
+    c = ch[j] - '0';
+    if (x > 120) {
+      x = 0;
+      y++;
+    }
+
+    for (k = 0; k < 4; k++) {
+      locate(x, y + k);
+      for (i = 0; i < 23; i++) {
+        send_data(F23x32[c * 23 * 4 + k * 23 + i]);
+      }
+    }
+    x += 25;
+    j++;
+  }
+}
+
+