Diff: VS1002.cpp

Revision:

0:c3c8793d0091

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/VS1002.cpp	Wed Mar 16 13:38:50 2016 +0000
@@ -0,0 +1,240 @@
+#include "VS1002.h"
+#include "mbed.h"
+#include "SDFileSystem.h"
+
+//Serial pc(USBTX, USBRX);
+//TextLCD lcd(p30, p29, p17, p18, p19, p20);
+
+/* ==================================================================
+ * Constructor
+ * =================================================================*/
+
+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, PinName vol)
+    : _sd(mmosi, mmiso, ssck, ccs, name), _spi(mosi, miso, sck), _CS(cs), _RST(rst), _DREQ(dreq), _DCS(dcs), _VOL(vol) {
+
+    }    
+
+/*===================================================================
+ * Functions
+ *==================================================================*/
+ 
+void VS1002::cs_low(void)
+{
+    _CS = 0;                                
+}
+void VS1002::cs_high(void)
+{
+    _CS = 1;                                
+}
+void VS1002::dcs_low(void)
+{
+    _DCS = 0;
+}
+void VS1002::dcs_high(void)
+{
+    _DCS = 1;
+}
+void VS1002::sci_en(void)                    //SCI enable
+{
+    cs_high();
+    dcs_high();
+    cs_low();
+}
+void VS1002::sci_dis(void)                    //SCI disable
+{
+    cs_high();
+}
+void VS1002::sdi_en(void)                    //SDI enable
+{
+    dcs_high();
+    cs_high();
+    dcs_low();
+}
+void VS1002::sdi_dis(void)                    //SDI disable
+{
+    dcs_high();
+}
+void VS1002::reset(void)                    //hardware reset
+{
+    wait(0.01);
+    _RST = 0;
+    wait(0.01);
+    _RST = 1;
+    wait(0.10);
+}
+void VS1002::power_down(void)                //hardware and software reset
+{
+    cs_low();
+    reset();
+    sci_write(0x00, SM_PDOWN);
+    wait(0.01);
+    reset();
+}
+void VS1002::sci_initialise(void)
+{
+    _RST = 1;                                //no reset
+    _spi.format(8,0);                        //spi 8bit interface, steady state low
+    _spi.frequency(1000000);                //rising edge data record, freq. 1Mhz
+    
+    cs_low();
+    for(int i=0; i<4; i++)
+    {
+    _spi.write(0xFF);                        //clock the chip a bit
+    }
+    cs_high();
+    dcs_high();
+    wait_us(5);
+}
+void VS1002::sdi_initialise(void)
+{
+    _spi.format(8,0);
+    _spi.frequency(7000000);                //set to 7MHz
+    
+    cs_high();
+    dcs_high();
+}
+void VS1002::sci_write(unsigned char address, unsigned short int data)
+{
+    sci_en();                                //enables SCI/disables SDI
+    
+    while(!_DREQ);                            //wait unitl data request is high
+    _spi.write(0x02);                        //SCI write
+    _spi.write(address);                    //register address
+    _spi.write((data >> 8) & 0xFF);            //write out first half of data word
+    _spi.write(data & 0xFF);                //write out second half of data word
+    
+    sci_dis();                                //enables SDI/disables SCI
+    wait_us(5);
+}
+void VS1002::sdi_write(unsigned char datum)
+{
+    sdi_en();
+    
+    while(!_DREQ);
+    _spi.write(datum);
+    
+    sci_dis();
+}
+unsigned short int VS1002::read(unsigned short int address)
+{
+    cs_low();                                //enables SCI/disables SDI
+    
+    while(!_DREQ);                            //wait unitl data request is high
+    _spi.write(0x03);                        //SCI write
+    _spi.write(address);                    //register address
+    unsigned short int received = _spi.write(0x00);    //write out dummy byte
+    received <<= 8;
+    received += _spi.write(0x00);            //write out dummy byte
+    
+    cs_high();                                //enables SDI/disables SCI
+    
+    return received;                        //return received word
+}
+void VS1002::sine_test_activate(unsigned char wave)
+{
+    cs_high();                                //enables SDI/disables SCI
+    
+    while(!_DREQ);                            //wait unitl data request is high
+    _spi.write(0x53);                        //SDI write
+    _spi.write(0xEF);                        //SDI write
+    _spi.write(0x6E);                        //SDI write
+    _spi.write(wave);                        //SDI write
+    _spi.write(0x00);                        //filler byte
+    _spi.write(0x00);                        //filler byte
+    _spi.write(0x00);                        //filler byte
+    _spi.write(0x00);                        //filler byte
+
+    cs_low();                                //enables SCI/disables SDI
+}
+void VS1002::sine_test_deactivate(void)
+{
+    cs_high();
+    
+    while(!_DREQ);
+    _spi.write(0x45);                        //SDI write
+    _spi.write(0x78);                        //SDI write
+    _spi.write(0x69);                        //SDI write
+    _spi.write(0x74);                        //SDI write
+    _spi.write(0x00);                        //filler byte
+    _spi.write(0x00);                        //filler byte
+    _spi.write(0x00);                        //filler byte
+    _spi.write(0x00);                        //filler byte
+}
+
+
+void VS1002::volume(signed int left, signed int right)
+{
+    while(_DREQ == 0);
+       
+    unsigned short int _left = -left;       //convert the decibel values into a format
+    unsigned short int _right = -right;     //readable by the chip cf. datasheet p.32 subsection 8.6.11
+    _left *= 2;
+    _right *= 2;
+    unsigned short int attenuation = ((256 * _left) + _right);
+    cs_low();
+    sci_write(0x0B, attenuation);               //writeout these values
+    cs_high();
+}
+
+void VS1002::play_song(int song_number)
+{
+    /*====== Song Select ======*/
+    
+    char str[16] = "/sd/music/";        //folder where the songs are located
+    sprintf(str+10,"%d",song_number);   //appending song number to path of the file
+    strcat(str,".mp3");                 //appending .mp3 to file name
+    FILE *song;
+    //pc.printf("%s",str);
+    unsigned char array[512];           //array for reading data from file
+    bool play_new=false;                // Variable to see if new_song has be assigned or not
+        
+    song = fopen(str, "r");    // Open the music file in read mode
+    //pc.printf("end reading music");
+    
+    /* Printing to LCD the present status */
+    // lcd.cls();
+  if(pause)
+   // lcd.printf("Paused ");
+  if(mute)
+  // lcd.printf("Muted");
+  if(!mute && !pause)
+  // lcd.printf("Playing"); 
+
+  //lcd.printf("\n %d %s",new_song_number,song_name[new_song_number-1]);
+   
+    if(!song) 
+    {
+     //   lcd.printf("\n \n Error!!");
+        exit(1);
+    }
+      while(!feof(song))
+    {
+            if(!pause)
+           {
+          
+           fread(&array, 1, 512, song);           
+           for(int i=0; i<512; i++)
+           {
+                sdi_write(array[i]);
+           }
+           volume(volume_set,volume_set);
+           }
+          if(new_song_number!=song_number)
+           {
+            play_new=true;
+             break;
+            }
+             
+             
+          }
+    
+           fclose(song);                              //close the file
+
+      if(!play_new)
+      {
+     new_song_number+=1;               // Goto Next song on completion of one song
+     if(new_song_number==7)
+      new_song_number=1; 
+     play_new=false;                   
+     }
+}
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