//Usage: vs1002SCIWrite(SCI_MODE, SM_SDINEW);
//Inputs: unsigned char address - Adress of the register to be written to
// unsigned short int data - Data to write to the register
//Outputs: None
//Description: Writes "data" to the register defined in "address"
void vs1002SCIWrite(unsigned char address, unsigned short int data)
{
SELECT_MP3_SCI();
SPI0_send(WRITE_COMMAND);
SPI0_send(address);
SPI0_send(data >> 8); // Send High Byte of data
SPI0_send(data & 0x00ff); // Send Low Byte of data
UNSELECT_MP3_SCI();
delay_ms(1);
}
//Usage: vs1002SendMusic(bufferedSongData, BUFFERSIZE);
//Inputs: unsigned char* songData - pointer to MP3 data that is to be sent to mp3 player
// int buffer_size - size of song data in bytes
//Outputs: None
//Description: Sends the data in the songData buffer to the MP3 player
void vs1002SendMusic(unsigned char* songData, int buffer_size){
SELECT_MP3_SDI();
for(int i=0; i<buffer_size; i++){
SPI0_send(*songData++); //Send the buffered byte of data, then increment the buffer position
}
UNSELECT_MP3_SDI();
}
/*----------------------------------------------------------------------------
MAIN function
*----------------------------------------------------------------------------*/
int main (void) { /* Main Program */
char state = 0;
uint8_t buf[] = {0x5, 0xA, 0x3, 0x5A};
SysTick_Config(SystemCoreClock/100); /* Generate IRQ each ~10 ms */
LED_init(); /* LED Initialization */
SER_init(); /* UART#1 Initialization */
SPI0_init();
while (1)
{ /* Loop forever */
if (clock_1s)
{
clock_1s = 0;
state++;
if (state & 0x01)
{
LED_On();
sendchar('A');
sendchar('\n');
sendchar('\r');
SPI0_send(buf, 4);
}
else
LED_Off();
}
}
}
//Usage: register_value = vs1002SCIRead(SCI_MODE);
//Inputs: unsigned char address - Address of the register to be read
//Ouputs: None
//Description: Returns the value of the vs1002 register defined by "address"
unsigned short int vs1002SCIRead(unsigned char address)
{
unsigned short int temp;
SELECT_MP3_SCI();
//delay_ms(1);
SPI0_send(READ_COMMAND);
SPI0_send(address);
temp = SPI0_recv();
temp <<= 8;
temp |= SPI0_recv();
//delay_ms(1);
UNSELECT_MP3_SCI();
delay_ms(1);
return temp;
}
//Usage: vs1002SineTest(126);
//Inputs: unsigned char pitch - pitch of the sine wave to be produced
//Outputs: None
//Description: Runs the Sine Test defined in the vs1002 datasheet
//**NOTE: ** for a sine wave test @ 5168 hz, send sequence: 0x53, 0xEF, 0x6E, 126, 0, 0, 0, 0
void vs1002SineTest(unsigned char pitch)
{
SELECT_MP3_SDI();
SPI0_send(0x53);
SPI0_send(0xEF);
SPI0_send(0x6E);
SPI0_send(pitch); //Send the Pitch
SPI0_send(0);
SPI0_send(0);
SPI0_send(0);
SPI0_send(0);
UNSELECT_MP3_SDI();
}
