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Diffstat (limited to 'components/codec-ak4641/ak4641.c')
| -rw-r--r-- | components/codec-ak4641/ak4641.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/components/codec-ak4641/ak4641.c b/components/codec-ak4641/ak4641.c new file mode 100644 index 0000000..f53a08d --- /dev/null +++ b/components/codec-ak4641/ak4641.c @@ -0,0 +1,225 @@ +/* ----------------------------------------------------------------------------
+ * ATMEL Microcontroller Software Support
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+
+#include <chip.h>
+#include <board.h>
+#include <dbgu/dbgu.h>
+#include <twi/twi.h>
+#include "ak4641.h"
+
+//------------------------------------------------------------------------------
+// Internal definitions
+//------------------------------------------------------------------------------
+
+// 5-bit address of an AK4641 component on the TWI interface
+#define AK4641_SLAVEADDRESS 0x12
+
+// Register addresses
+// Power management 1 register address
+#define AK4641_POWMGT1 0x00
+// Power management 2 register address
+#define AK4641_POWMGT2 0x01
+// Signal select 2 register address
+#define AK4641_SIGSEL2 0x03
+// DAC control register address
+#define AK4641_DACCTRL 0x06
+// MIC control register address
+#define AK4641_MICCTRL 0x07
+
+// Register field values
+// Power management 1 register
+// Powers up the ADC block of the stereo CODEC
+#define AK4641_POWMGT1_PMADC (1 << 0)
+// Powers up the MIC in block of the stereo CODEC
+#define AK4641_POWMGT1_PMMIC (1 << 1)
+// Powers up the AUX in block of the stereo CODEC
+#define AK4641_POWMGT1_PMAUX (1 << 2)
+// Powers up the Mont out block of the stereo CODEC
+#define AK4641_POWMGT1_PMMO (1 << 3)
+// Powers up the Line out block of the stereo CODEC
+#define AK4641_POWMGT1_PMLO (1 << 4)
+// Powers up the VCOM block of the stereo DEOC
+#define AK4641_POWMGT1_PMVCM (1 << 7)
+
+// Power management 2 register
+// Powers up the DAC block of the stereo CODEC
+#define AK4641_POWMGT2_PMDAC (1 << 0)
+// Powers up the Mono out 2 block of the stereo CODEC
+#define AK4641_POWMGT2_PMMO2 (1 << 3)
+// Sets the master clock input mode to AC-coupling
+#define AK4641_POWMGT2_MCKAC (1 << 4)
+// Disables the master clock input buffer control
+#define AK4641_POWMGT2_MCKPD (1 << 7)
+
+// Signal select 2 register
+// Selects the right channel line output
+#define AK4641_SIGSEL2_PSLOR (1 << 0)
+// Selects the left channel line output
+#define AK4641_SIGSEL2_PSLOL (1 << 1)
+// Selects AUX single-ended output
+#define AK4641_SIGSEL2_AUXSI (1 << 2)
+// Sets MIC in as the line out mixer output
+#define AK4641_SIGSEL2_MICL (1 << 4)
+// Sets AUX in as the line out mixer output
+#define AK4641_SIGSEL2_AUXL (1 << 5)
+// Sets the DAC as the line out mixer output
+#define AK4641_SIGSEL2_DACL (1 << 7)
+
+// DAC control register
+// De-emphasis filter for a 44.1kHz sample rate
+#define AK4641_DACCTRL_DEM44_1 0
+// Disables the de-emphasis filter
+#define AK4641_DACCTRL_DEMDIS 1
+// De-emphasis filter for a 48kHz sample rate
+#define AK4641_DACCTRL_DEM48 2
+// De-emphasis filter for a 32kHz sample rate
+#define AK4641_DACCTRL_DEM32 3
+// Attenuator level for left & right channels controlled by the ATTL6-0 bits
+#define AK4641_DACCTRL_DATTC (1 << 4)
+// Soft-mutes the DAC
+#define AK4641_DACCTRL_SMUTE (1 << 5)
+// Sets the soft mute time setting to 256/Fs
+#define AK4641_DACCTRL_TM (1 << 6)
+
+// MIC control register
+// Enables the 20dB gain on the microphone input
+#define AK4641_MICCTRL_MGAIN (1 << 0)
+// Select the microphone as the ADC input
+#define AK4641_MICCTRL_MICAD (1 << 2)
+// Enables the power supply input for the internal microphone
+#define AK4641_MICCTRL_MPWRI (1 << 3)
+
+//------------------------------------------------------------------------------
+// Internal functions
+//------------------------------------------------------------------------------
+/*!
+ Reads data (using the given \a twi peripheral) from an AK4146 starting with
+ a particular \a registerAddress and stores it in the provided \a buffer.
+ Data is read until the buffer is filled to its \a bufferSize.
+
+ This function returns true if the read operation was successful; otherwise
+ it returns false.
+ */
+inline unsigned char AK4641_Read(AT91S_TWI *twi,
+ void *buffer,
+ unsigned int bufferSize,
+ unsigned char registerAddress)
+{
+ return TWI_Read(twi,
+ buffer,
+ bufferSize,
+ AK4641_SLAVEADDRESS,
+ registerAddress,
+ 1);
+}
+
+/*!
+ Writes (through a \a twi interface) the content of the provided \a buffer
+ in the registers of an AK4641 component, starting at the specified
+ \a registerAddress.
+
+ This function returns true if the write operation was successful; otherwise
+ it returns false.
+ */
+inline unsigned char AK4641_Write(AT91S_TWI *twi,
+ void *buffer,
+ unsigned int bufferSize,
+ unsigned char registerAddress)
+{
+ return TWI_Write(twi,
+ buffer,
+ bufferSize,
+ AK4641_SLAVEADDRESS,
+ registerAddress,
+ 1);
+}
+
+//------------------------------------------------------------------------------
+// Exported functions
+//------------------------------------------------------------------------------
+/*!
+ Configures an external AK4641 component, through the specified \a twi
+ interface.
+
+ The TWI interface and the AK4641 master clock must both be already
+ configured properly before calling this method.
+ */
+inline void AK4641_Configure(AT91S_TWI *twi)
+{
+ unsigned char value;
+ unsigned char values[20];
+
+ // Power up the ADC and VCOM blocks
+ value = AK4641_POWMGT1_PMADC | AK4641_POWMGT1_PMVCM;
+ AK4641_Write(twi, &value, 1, AK4641_POWMGT1);
+
+ // Power up the DAC
+ value = AK4641_POWMGT2_PMDAC;
+ AK4641_Write(twi, &value, 1, AK4641_POWMGT2);
+
+ // Select the right and left channel outputs, enable the DAC output
+ value = AK4641_SIGSEL2_PSLOR | AK4641_SIGSEL2_PSLOL | AK4641_SIGSEL2_DACL;
+ AK4641_Write(twi, &value, 1, AK4641_SIGSEL2);
+
+ // Disable the de-emphasis filter
+ value = AK4641_DACCTRL_DEMDIS;// | AK4641_DACCTRL_SMUTE;
+ AK4641_Write(twi, &value, 1, AK4641_DACCTRL);
+
+ // Enable the MIC 20dB gain and the internal MIC power supply
+ value = AK4641_MICCTRL_MGAIN | AK4641_MICCTRL_MICAD | AK4641_MICCTRL_MPWRI;
+ AK4641_Write(twi, &value, 1, AK4641_MICCTRL);
+
+ // Power up the Line out and Mic blocks
+ value = AK4641_POWMGT1_PMMIC | AK4641_POWMGT1_PMADC
+ | AK4641_POWMGT1_PMVCM | AK4641_POWMGT1_PMLO;
+ AK4641_Write(twi, &value, 1, AK4641_POWMGT1);
+}
+
+/*!
+ Mutes or unmutes an external AK4641 component connected to the given \a twi
+ peripheral, depending on the value of the \a muted parameter.
+ */
+inline void AK4641_SetMuted(AT91S_TWI *twi, unsigned char muted)
+{
+ if (muted) {
+
+ unsigned char value = AK4641_DACCTRL_DEMDIS | AK4641_DACCTRL_SMUTE;
+ AK4641_Write(twi, &value, 1, AK4641_DACCTRL);
+ }
+ else {
+
+ unsigned char value = AK4641_DACCTRL_DEMDIS;
+ AK4641_Write(twi, &value, 1, AK4641_DACCTRL);
+ }
+}
+
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