/* ------------------------------------------------------------------------ *
* *
* _I2C_read( i2c_addr, data, len ) *
* *
* I2C read in Master mode *
* *
* i2c_addr <- I2C slave address *
* data <- I2C data ptr *
* len <- # of bytes to write *
* *
* Returns: 0: PASS *
* -1: FAIL Timeout *
* *
* ------------------------------------------------------------------------ */
Int16 USBSTK5505_I2C_read( Uint16 i2c_addr, Uint8* data, Uint16 len )
{
Int32 timeout, i;
I2C_CNT = len; // Set length
I2C_SAR = i2c_addr; // Set I2C slave address
I2C_MDR = MDR_STT // Set for Master Read
| MDR_MST
| MDR_IRS
| MDR_FREE;
USBSTK5505_wait( 10 ); // Short delay
for ( i = 0 ; i < len ; i++ )
{
timeout = i2c_timeout;
//Wait for Rx Ready
do
{
if ( timeout-- < 0 )
{
USBSTK5505_I2C_reset( );
return -1;
}
} while ( ( I2C_STR & STR_RRDY ) == 0 );// Wait for Rx Ready
data[i] = I2C_DRR; // Read
}
I2C_MDR |= MDR_STP; // Generate STOP
USBSTK5505_waitusec(10);
return 0;
}
/*
*
* aic3204_test( )
*
* Test different configurations of the AIC3204
*/
Int16 aic3204_test( )
{
/* Set A20_MODE for GPIO mode */
CSL_FINST(CSL_SYSCTRL_REGS->EBSR, SYS_EBSR_A20_MODE, MODE1);
/* Use GPIO to enable AIC3204 chip */
USBSTK5505_GPIO_init();
USBSTK5505_GPIO_setDirection(GPIO26, GPIO_OUT);
USBSTK5505_GPIO_setOutput( GPIO26, 1 ); // Take AIC3201 chip out of reset
/* Initialize I2C */
USBSTK5505_I2C_init( );
/* Codec tests */
printf( " -> 1 KHz Tone on Headphone.\n" );
if ( aic3204_tone_headphone( ) ) // Output test
return 1;
USBSTK5505_wait( 100 ); // Wait
printf( "<-> Audio Loopback from Stereo IN --> to HP OUT\n" );
if ( aic3204_loop_linein( ) ) // Loop test
return 3;
USBSTK5505_GPIO_setOutput( GPIO26, 0 ); // Disable AIC3204
return 0;
}
void aic3204_hardware_init(void)
{
// SYS_EXBUSSEL |= 0x0020; // Select A20/GPIO26 as GPIO26
// USBSTK5505_GPIO_init();
// USBSTK5505_GPIO_setDirection(GPIO26, GPIO_OUT);
// USBSTK5505_GPIO_setOutput( GPIO26, 1 ); // Take AIC3204 chip out of reset
USBSTK5505_I2C_init( ); // Initialize I2C
USBSTK5505_wait( 100 ); // Wait
}
/* ------------------------------------------------------------------------ *
* *
* _AIC3204_rget( regnum, regval ) *
* *
* Return value of codec register regnum *
* *
* ------------------------------------------------------------------------ */
Int16 AIC3204_rget( Uint16 regnum, Uint16* regval )
{
Int16 retcode = 0;
Uint8 cmd[2];
cmd[0] = regnum & 0x007F; // 7-bit Device Address
cmd[1] = 0;
retcode |= USBSTK5505_I2C_write( AIC3204_I2C_ADDR, cmd, 1 );
retcode |= USBSTK5505_I2C_read( AIC3204_I2C_ADDR, cmd, 1 );
*regval = cmd[0];
USBSTK5505_wait( 10 );
return retcode;
}
/* ------------------------------------------------------------------------ *
* *
* _I2C_write( i2c_addr, data, len ) *
* *
* I2C write in Master mode *
* *
* i2c_addr <- I2C slave address *
* data <- I2C data ptr *
* len <- # of bytes to write *
* *
* ------------------------------------------------------------------------ */
Int16 USBSTK5505_I2C_write( Uint16 i2c_addr, Uint8* data, Uint16 len )
{
Int32 timeout, i;
//I2C_IER = 0x0000;
I2C_CNT = len; // Set length
I2C_SAR = i2c_addr; // Set I2C slave address
I2C_MDR = MDR_STT // Set for Master Write
| MDR_TRX
| MDR_MST
| MDR_IRS
| MDR_FREE;
USBSTK5505_wait(10); // Short delay
for ( i = 0 ; i < len ; i++ )
{
I2C_DXR = data[i]; // Write
timeout = i2c_timeout;
do
{
if ( timeout-- < 0 )
{
USBSTK5505_I2C_reset( );
return -1;
}
} while ( ( I2C_STR & STR_XRDY ) == 0 );// Wait for Tx Ready
}
I2C_MDR |= MDR_STP; // Generate STOP
USBSTK5505_waitusec(100);
return 0;
}
