/* ------------------------------------------------------------------------ *
 *                                                                          *
 *  _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;
}
Exemple #2
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/*
 *
 *  AIC3204_rset( regnum, regval )
 *
 *      Set codec register regnum to value regval
 *
 */
Int16 AIC3204_rset( Uint16 regnum, Uint16 regval )
{
    Uint16 cmd[2];
    cmd[0] = regnum & 0x007F;       // 7-bit Device Register
    cmd[1] = regval;                // 8-bit Register Data

    USBSTK5505_waitusec( 300 );

    return USBSTK5505_I2C_write( AIC3204_I2C_ADDR, cmd, 2 );
}
/* ------------------------------------------------------------------------ *
 *                                                                          *
 *  _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;

}