Diff: vs10xx.cpp

Revision:

0:58524d569dfd

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vs10xx.cpp	Fri Dec 02 19:37:00 2016 +0000
@@ -0,0 +1,148 @@
+/** \file vs10xx.c
+ * Functions for interfacing with the mp3 player chip.
+ * \todo safe rewind
+ * \todo VS1003 WMA "wma-bytes-left" variable adjustment at ff/rew
+ */
+#include "vs10xx.h"
+
+/** Constructor of class VS1053. */
+vs10xx::vs10xx(PinName MOSI, PinName MISO, PinName SCLK, PinName XCS, 
+               PinName XDCS,PinName DREQ, PinName XRESET)
+                :  
+                _spi(MOSI,MISO,SCLK),
+                _XCS(XCS),
+                _XDCS(XDCS),
+                _DREQ(DREQ),
+                _XRESET(XRESET)    
+{
+    _XCS = 1;
+    _XDCS = 1;
+    _XRESET = 1;
+}
+
+/** Write the 16-bit value to VS10xx register*/
+void vs10xx::writeRegister(unsigned char addressbyte,unsigned int value)
+{
+    _XCS = 1;
+    while (!_DREQ);
+	_XCS = 0;
+ 	_spi.write(VS_WRITE_COMMAND);
+ 	_spi.write(addressbyte);
+ 	_spi.write(value >> 8);
+ 	_spi.write(value & 0xFF);
+ 	_XCS = 1;
+}
+
+/** Read the 16-bit value of a VS10xx register */
+unsigned int vs10xx::readRegister (unsigned char addressbyte)
+{
+    unsigned int resultvalue = 0;
+    
+    _XCS = 1;
+    while (!_DREQ);
+	_XCS = 0;
+    _spi.write(VS_READ_COMMAND);
+    _spi.write((addressbyte));
+    resultvalue = _spi.write(0XFF) << 8;
+    resultvalue |= _spi.write(0XFF); 
+    _XCS = 1;
+    return resultvalue;
+}
+
+/** write data to VS10xx  */
+void vs10xx::writeData(unsigned char *databuf,unsigned char n)
+{
+    _XDCS = 1;
+    _XDCS = 0;
+    while (!_DREQ);
+    while (n--)
+    {
+        _spi.write(*databuf++);
+    }
+    _XDCS = 1;
+}
+
+void vs10xx::setFreq(int freq)
+{
+    _spi.frequency(freq);        //set freq for speed
+}
+
+void vs10xx::setVolume(unsigned char vol)
+{
+    writeRegister(SPI_VOL, vol*0x101);     //Set volume level
+}
+
+/** Soft Reset of VS10xx (Between songs) */
+void vs10xx::softReset()
+{
+    _spi.frequency(1000000);          //low speed
+    
+    /* Soft Reset of VS10xx */
+    writeRegister(SPI_MODE, 0x0804); /* Newmode, Reset, No L1-2 */
+    
+    wait_ms(2);         //delay
+    while(!_DREQ);
+    
+    /* A quick sanity check: write to two registers, then test if we
+     get the same results. Note that if you use a too high SPI
+     speed, the MSB is the most likely to fail when read again. */
+    writeRegister(SPI_HDAT0, 0xABAD);
+    writeRegister(SPI_HDAT1, 0x1DEA);
+    if (readRegister(SPI_HDAT0) != 0xABAD || readRegister(SPI_HDAT1) != 0x1DEA) {
+        printf("There is something wrong with VS10xx\n");
+    }
+    
+    writeRegister(SPI_CLOCKF,0XC000);   //Set the clock
+    writeRegister(SPI_AUDATA,0xbb81);   //samplerate 48k,stereo
+    writeRegister(SPI_BASS, 0x0055);    //set accent
+    writeRegister(SPI_VOL, 0x4040);     //Set volume level
+        
+    while (!_DREQ);
+    
+}
+
+/** Reset VS10xx */
+void vs10xx::reset(){
+
+    _XRESET = 0;
+    wait_ms(2);  //it is a must
+    
+    /* Send dummy SPI byte to initialize SPI */
+    _spi.write(0xFF);
+
+    /* Un-reset VS10XX chip */
+    _XCS = 1;
+    _XDCS = 1;
+    _XRESET = 1;
+
+    softReset(); //vs10xx soft reset.
+
+   // printf("\r\nVS10xx Init\r\n");
+}
+
+/*     Loads a plugin.       */
+void vs10xx::loadPlugin(const unsigned short *plugin,int length) {
+    int i = 0;
+    while (i<length) {
+        unsigned short addr, n, val;
+        addr = plugin[i++];
+        n = plugin[i++];
+        if (n & 0x8000U) { /* RLE run, replicate n samples */
+            n &= 0x7FFF;
+            val = plugin[i++];
+            while (n--) {
+                writeRegister(addr, val);
+            }
+        } else {           /* Copy run, copy n samples */
+            while (n--) {
+                val = plugin[i++];
+                writeRegister(addr, val);
+            }
+        }
+    }
+}
+
+
+
+
+