Hi friends,
I am using a C5515 device and a AIC3254 audio codec. I am trying to connect the codec to the DSP using I2S.
I want this configuration:
AIC as a master, DSP as a slave.
16bit words
48ksamples per second
write data to the codec and output it to the head phones.
The AIC is connected using I2S 1.
Below please find a sample from the code I am using.
I am having two problems:
1) The transmit interrupt is never received, so the code stops in the while((Xmit & I2S1_IR) == 0);
2) I hear a lot of noise, and not the sound that I send to the codec.
Any help please? I suspect I have some wrong PLL or clock settings, but am not sure. I have tried several types of settings, but after three days trying, I decided to see if I could get an opinion from you guys :)
Thanks a lot!
Simon
void main( void )
{
aic3254_initialise();
test();
}
Int16 aic3254_initialise( )
{
SYS_EXBUSSEL &= ~0x7000;
SYS_EXBUSSEL |= 0x1000; // Configure Parallel Port
/* Configure Serial Port */
SYS_EXBUSSEL &= ~0x0C00;
SYS_EXBUSSEL |= 0x0400; // Serial Port mode 1 (I2S1 and GP[11:10])
EVM5515_GPIO_init();
EVM5515_GPIO_setDirection(GPIO10, GPIO_IN);
EVM5515_GPIO_setDirection(GPIO11, GPIO_IN);
EVM5515_GPIO_setDirection(GPIO4, GPIO_OUT);
EVM5515_GPIO_setOutput( GPIO4, 1 ); // Take AIC3254 out from reset
EVM5515_wait( 100 ); // Wait
EVM5515_I2C_init( ); // Initialize I2C
/* Configure AIC3204 */
AIC3204_rset( 0, 0x00 ); // Select page 0
AIC3204_rset( 1, 0x01 ); // Reset codec
AIC3204_rset( 0, 0x01 ); // Point to page 1
AIC3204_rset( 1, 0x80 ); // Disable crude AVDD generation from DVDD
AIC3204_rset( 2, 0x00 ); // Enable Analog Blocks
// PLL and Clocks config and Power Up
AIC3204_rset( 0, 0x00 ); // Select page 0
AIC3204_rset( 27, 0x0D ); // BCLK and WCLK is set as i/p to AIC3204(Slave)
AIC3204_rset( 4, 0x03 ); // BCLK and WCLK are outputs
AIC3204_rset( 6, 0x08 ); // PLL setting: J
AIC3204_rset( 7, 0x07 ); // PLL setting: HI_BYTE(D)
AIC3204_rset( 8, 0x80 ); // PLL setting: LO_BYTE(D)
AIC3204_rset( 30, 0x91 );
// For 48 KHz sampling
AIC3204_rset( 5, 0x92 ); // PLL setting: Power up PLL, P=1 and R=2
AIC3204_rset( 13, 0x00 ); // Hi_Byte(DOSR) for DOSR = 128 decimal or 0x0080 DAC oversamppling
AIC3204_rset( 14, 0x80 ); // Lo_Byte(DOSR) for DOSR = 128 decimal or 0x0080
AIC3204_rset( 20, 0x80 ); // AOSR for AOSR = 128 decimal or 0x0080 for decimation filters 1 to 6
AIC3204_rset( 11, 0x88 ); // Power up NDAC and set NDAC value to 8
AIC3204_rset( 12, 0x82 ); // Power up MDAC and set MDAC value to 2
AIC3204_rset( 18, 0x88 ); // Power up NADC and set NADC value to 8
AIC3204_rset( 19, 0x82 ); // Power up MADC and set MADC value to 2
// DAC ROUTING and Power Up
AIC3204_rset( 0, 0x01 ); // Select page 1
AIC3204_rset( 12, 0x08 ); // LDAC AFIR routed to HPL
AIC3204_rset( 13, 0x08 ); // RDAC AFIR routed to HPR
AIC3204_rset( 0, 0x00 ); // Select page 0
AIC3204_rset( 64, 0x02 ); // Left vol=right vol
AIC3204_rset( 65, 0x00 ); // Left DAC gain to 0dB VOL; Right tracks Left
AIC3204_rset( 63, 0xd4 ); // Power up left,right data paths and set channel
AIC3204_rset( 0, 0x01 ); // Select page 1
AIC3204_rset( 16, 0x06 ); // Unmute HPL , 6dB gain
AIC3204_rset( 17, 0x06 ); // Unmute HPR , 6dB gain
AIC3204_rset( 9, 0x30 ); // Power up HPL,HPR
AIC3204_rset( 0, 0x00 ); // Select page 0
EVM5515_wait( 500 ); // Wait
// ADC ROUTING and Power Up
AIC3204_rset( 0, 0x01 ); // Select page 1
AIC3204_rset( 52, 0x0C ); // STEREO 1 Jack
// IN2_L to LADC_P through 40 kohm
AIC3204_rset( 55, 0x0C ); // IN2_R to RADC_P through 40 kohmm
AIC3204_rset( 54, 0x03 ); // CM_1 (common mode) to LADC_M through 40 kohm
AIC3204_rset( 57, 0xC0 ); // CM_1 (common mode) to RADC_M through 40 kohm
AIC3204_rset( 59, 0x00 ); // MIC_PGA_L unmute
AIC3204_rset( 60, 0x00 ); // MIC_PGA_R unmute
AIC3204_rset( 0, 0x00 ); // Select page 0
AIC3204_rset( 81, 0xc0 ); // Powerup Left and Right ADC
AIC3204_rset( 82, 0x00 ); // Unmute Left and Right ADC
AIC3204_rset( 0, 0x00 );
EVM5515_wait( 200 ); // Wait
/* I2S settings */
I2S1_SRGR = 0x0015;
I2S1_ICMR = 0x003F; // Enable interrupts
I2S1_CR = 0x8010; // 16-bit word, Slave, enable I2C
}
Int16 test( )
{
for ( i = 0 ; i < 5 ; i++ )
{
for ( j = 0 ; j < 1000 ; j++ )
{
for ( sample = 0 ; sample < 48 ; sample++ )
{
data3 = I2S1_W0_MSW_R;
data1 = I2S1_W0_LSW_R;
data4 = I2S1_W1_MSW_R;
data2 = I2S1_W1_LSW_R;
while((Rcv & I2S1_IR) == 0); // Wait for interrupt
I2S1_W0_MSW_W = (sinetable[sample]) ;
I2S1_W0_LSW_W = 0;
I2S1_W1_MSW_W = (sinetable[sample]) ;
I2S1_W1_LSW_W = 0;
while((Xmit & I2S1_IR) == 0); // Wait for interrupt
}
}
}
}
