Here are my settings for ADC which are working nice but the loop back is not working why what else could i configure
void AIC3204_Init(void)
{
#endif
asm(" BIT (ST1, #ST1_INTM) = #1");//Disable Global Interrupts
//taken from AED
// Configure AIC3204
AIC3204_rset( 0, 0 ); // Select page 0
AIC3204_rset( 1, 1 ); // Reset codec
USBSTK5515_wait_Test( 200 ); // Wait
//Configure Power Supplies
AIC3204_rset( 0, 1 ); // Point to page 1
AIC3204_rset( 1, 8 ); // Disable crude AVDD generation from DVDD
AIC3204_rset( 2, 1 ); // Enable Analog Blocks, use LDO power
// PLL and Clocks config and Power Up
AIC3204_rset( 0, 0 ); // Select page 0
AIC3204_rset( 27, 0x0d ); // I2S interface, 16 Bit, BCLK and WCLK is set as o/p ,DOUT High Impedence
AIC3204_rset( 28, 0x00 ); // Data ofset = 0
AIC3204_rset( 4, 3 ); // PLL setting: PLLCLK <- MCLK, CODEC_CLKIN <-PLL CLK
AIC3204_rset( 6, 4 ); // PLL setting: J = 4
AIC3204_rset( 7, 0x17 ); // PLL setting: HI_BYTE(D)
AIC3204_rset( 8, 0xc0 ); // PLL setting: LO_BYTE(D)
AIC3204_rset( 30, 0x88 ); // BCLK N Divider ->> DAC_CLK/N =(12288000/8) = 1.536MHz = 32*fs
AIC3204_rset( 5, 0xA4 ); // PLL setting: Power up PLL, P=2 and R=4
AIC3204_rset( 13, 0 ); // Hi_Byte(DOSR)
AIC3204_rset( 14, 0x80 ); // Lo_Byte(DOSR)
AIC3204_rset( 20, 0x80 ); // AOSR for AOSR = 128 ->> Use with PRB_R1 to PRB_R6, ADC Filter Type A)
AIC3204_rset( 11, 0x80+36 ); // Power up NDAC and set NDAC value to 36
AIC3204_rset( 12, 0x83 ); // Power up MDAC and set MDAC value to 3
AIC3204_rset( 18, 0x80+36 ); // Power up NADC and set NADC value to 36
AIC3204_rset( 19, 0x83 ); // Power up MADC and set MADC value to 3
// ADC ROUTING and Power Up
AIC3204_rset( 0, 1 ); // Select page 1
AIC3204_rset(10,0x43); // common mode control register
AIC3204_rset(51,0x68); // MicBias = LDO_IN
#ifdef PRE_AMP
AIC3204_rset( 52, 0xC0 ); // IN1_L Routed to Left PGA
#else
AIC3204_rset( 52, 0x30 ); // IN2_L Routed to Left PGA - For new AED board (03) Left +
#endif
AIC3204_rset( 54, 0xC0 ); // CM_1 (common mode) to LADC_M through 40 kohm Left -
AIC3204_rset( 59, 0x5f ); // MIC_PGA_L unmute Left Mic PGA = 47.5 dB
//AIC3204_rset( 59, 80 ); // MIC_PGA_L unmute Left Mic PGA = 40 dB
AIC3204_rset( 0, 0 ); // Select page 0
#ifdef PRE_AMP
AIC3204_rset( 83,5 ); // Left ADC Channel Volume 2.5dB with this over all gain is 50dB
#endif
#ifdef AGC_ENABLE
#endif
AIC3204_rset( 81, 0x80 ); // Powerup Left
AIC3204_rset( 82, 0x08 ); // Unmute Left and Mute Right
// 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( 29, 0x30 ); // Loop Back
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, 6 ); // Unmute HPL , 6dB gain
AIC3204_rset( 17, 6 ); // Unmute HPR , 6dB gain
AIC3204_rset( 9, 0x30 ); // Power up HPL,HPR
AIC3204_rset( 0, 0x00 ); // Select page 0
USBSTK5515_wait_Test( 500 ); // Wait
