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Diffstat (limited to 'components/codec-wm8731/wm8731.c')
| -rw-r--r-- | components/codec-wm8731/wm8731.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/components/codec-wm8731/wm8731.c b/components/codec-wm8731/wm8731.c new file mode 100644 index 0000000..5b5a4e6 --- /dev/null +++ b/components/codec-wm8731/wm8731.c @@ -0,0 +1,159 @@ +/* ----------------------------------------------------------------------------
+ * 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.
+ * ----------------------------------------------------------------------------
+ */
+
+ //------------------------------------------------------------------------------
+/// \unit
+///
+/// !Purpose
+///
+/// WM8731 driver
+///
+/// !Usage
+///
+/// Explanation on the usage of the code made available through the header file.
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+#include "wm8731.h"
+#include <board.h>
+
+//------------------------------------------------------------------------------
+// Definitions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+// Internal functions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+// Exported functions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// Read data from WM8731 Register.
+/// \param pTwid pointer to twi driver structure
+/// \param device twi slave address
+/// \param regAddr register address to read.
+//------------------------------------------------------------------------------
+unsigned short WM8731_Read(Twid *pTwid,
+ unsigned int device,
+ unsigned int regAddr)
+{
+ unsigned short bitsDataRegister;
+ unsigned char Tdata[2]={0,0};
+
+ TWID_Read(pTwid, device, regAddr, 0, Tdata, 2, 0);
+ bitsDataRegister = (Tdata[0] << 8) | Tdata[1];
+ return bitsDataRegister;
+}
+
+//------------------------------------------------------------------------------
+/// Write data to WM8731 Register.
+/// \param pTwid pointer to twi driver structure
+/// \param device twi slave address
+/// \param regAddr register address to read.
+/// \param data data to write
+//------------------------------------------------------------------------------
+void WM8731_Write(Twid *pTwid,
+ unsigned int device,
+ unsigned int regAddr,
+ unsigned short data)
+{
+ unsigned char tmpData[2];
+ unsigned short tmp;
+ tmp = ((regAddr & 0x7f) << 9) | (data & 0x1ff);
+
+ tmpData[0] = (tmp & 0xff00) >> 8;
+ tmpData[1] = tmp & 0xff;
+ TWID_Write(pTwid, device, regAddr, 0, tmpData, 2, 0);
+}
+
+//------------------------------------------------------------------------------
+/// Init WM8731 to DAC mode.
+/// \param pTwid pointer to twi driver structure
+/// \param device twi slave address
+//------------------------------------------------------------------------------
+unsigned char WM8731_DAC_Init(Twid *pTwid,
+ unsigned int device)
+{
+ // reset
+ WM8731_Write(pTwid, device, WM8731_REG_RESET, 0);
+
+ // analogue audio path control
+ WM8731_Write(pTwid, device, WM8731_REG_ANALOGUE_PATH_CTRL, 0x12);
+
+ // digital audio path control
+ WM8731_Write(pTwid, device, WM8731_REG_DIGITAL_PATH_CTRL, 0x00);
+
+ // power down control
+ WM8731_Write(pTwid, device, WM8731_REG_PWDOWN_CTRL, 0x7);
+
+ // Active control
+ WM8731_Write(pTwid, device, WM8731_REG_ACTIVE_CTRL, 0x01);
+
+ return 0;
+}
+
+//------------------------------------------------------------------------------
+/// Power down WM8731 DAC.
+/// \param pTwid pointer to twi driver structure
+/// \param device twi slave address
+//------------------------------------------------------------------------------
+void WM8731_DAC_PD(Twid *pTwid,
+ unsigned int device)
+{
+ // power down control
+ WM8731_Write(pTwid, device, WM8731_REG_PWDOWN_CTRL, 0xf);
+}
+
+
+//------------------------------------------------------------------------------
+/// Set WM8731 volume
+/// \param pTwid pointer to twi driver structure
+/// \param device twi slave address
+/// \param register register address
+/// \param value register value, valid value is between 0x30 to 0x7f
+//------------------------------------------------------------------------------
+unsigned char WM8731_VolumeSet(Twid *pTwid,
+ unsigned int device,
+ unsigned short value)
+{
+ unsigned short regValue;
+
+ value &= WM8731_LHPVOL_BITS;
+ regValue = WM8731_LRHPBOTH_BIT | WM8731_LZCEN_BIT | value;
+ WM8731_Write(pTwid, device, WM8731_REG_LEFT_HPOUT, regValue);
+ regValue = WM8731_RZCEN_BIT | WM8731_RLHPBOTH_BIT | value;
+ WM8731_Write(pTwid, device, WM8731_REG_RIGHT_HPOUT, value);
+
+ return 0;
+}
+
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