unsigned int MP3_wram_read(unsigned int address) {
unsigned int tmp1,tmp2;
MP3_SCI_Write(SCI_WRAMADDR_ADDR,address);
tmp1=MP3_SCI_ReadSingle(SCI_WRAM_ADDR);
MP3_SCI_Write(SCI_WRAMADDR_ADDR,address);
tmp2=MP3_SCI_ReadSingle(SCI_WRAM_ADDR);
if (tmp1==tmp2) return tmp1;
MP3_SCI_Write(SCI_WRAMADDR_ADDR,address);
tmp1=MP3_SCI_ReadSingle(SCI_WRAM_ADDR);
if (tmp1==tmp2) return tmp1;
MP3_SCI_Write(SCI_WRAMADDR_ADDR,address);
tmp1=MP3_SCI_ReadSingle(SCI_WRAM_ADDR);
if (tmp1==tmp2) return tmp1;
return tmp1;
}
//***********************************************//
//MP3_Init
//Prototype: void MP3_Init(void)
//Description: initial vs1011e chip
//Returns: None.
//***********************************************//
void MP3_Init()
{
MP3_pin_init();
// Clear BSYNC
// Hardware reset
MP3_reset();
while (!DREQ);
MP3_SCI_Write(SCI_MODE_ADDR, 0x0800); //mode new
MP3_SCI_Write(SCI_BASS_ADDR, 0x7A00);
MP3_SCI_Write(SCI_CLOCKF_ADDR,0x9800); // default 12 288 000 Hz
// // Maximum volume is 0x00 and total silence is 0xFE.
//
// // volume_right = 40; //0x3F;
MP3_Set_Volume( 40, 40);
Delay_ms(500);
}
//************************************************//
//MP3_soft_reset
//Prototype: void MP3_soft_reset(unsigned char)
//Parameters: volume value after reset.
//Description: perform software reset for vs1011e, and set new volume.
//Returns: None.
//***********************************************//
void MP3_soft_reset(unsigned char volume)
{
MP3_SCI_Write(SCI_MODE_ADDR ,0x0804) ;
Delay_ms(1); /* One millisecond delay */
while (!DREQ) /* wait for startup */
;
Delay_ms(100);
MP3_SCI_Write(SCI_MODE_ADDR, 0x0800); //mode new
MP3_SCI_Write(SCI_BASS_ADDR, 0x7A00);
MP3_SCI_Write(SCI_CLOCKF_ADDR,0x9800); // default 12 288 000 Hz
// Delay_ms(200); /* One millisecond delay */
MP3_Set_Volume(volume, volume);
Delay_ms(100);
MP3_SDI_Write(0x00);
MP3_SDI_Write(0x00);
MP3_SDI_Write(0x00);
MP3_SDI_Write(0x00);
Delay_ms(100);
}
/**************************************************************************************************
* Function MP3_Set_Volume()
* -------------------------------------------------------------------------------------------------
* Overview: Function set volume on the left and right channel
* Input: left channel volume, right channel volume
* Output: Nothing
**************************************************************************************************/
void MP3_Set_Volume(char left, char right) {
unsigned int volume;
volume = (left<<8) + right; // calculate value
MP3_SCI_Write(SCI_VOL_ADDR, volume); // Write value to VOL register
}
void MP3_wram_write(unsigned int address, unsigned int writeData) {
MP3_SCI_Write(SCI_WRAMADDR_ADDR, address);
MP3_SCI_Write(SCI_WRAM_ADDR, writeData);
return;
}
