Diff: WM8731.cpp

Revision:

0:0d5190d379d3

Child:

3:7ef908e84ae1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WM8731.cpp	Mon Aug 25 13:15:27 2014 +0000
@@ -0,0 +1,61 @@
+/*
+ *  Copyright 2013 Embedded Artists AB
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+/******************************************************************************
+ * Includes
+ *****************************************************************************/
+
+#include "mbed.h"
+#include "mbed_debug.h"
+
+#include "WM8731.h"
+
+/******************************************************************************
+ * Defines and typedefs
+ *****************************************************************************/
+
+#define WM8731_I2C_ADDR (0x1A << 1)
+
+#define WM8731_REG_R0_LEFT_LINE_IN                    0x00
+#define WM8731_REG_R1_RIGHT_LINE_IN                   0x01
+#define WM8731_REG_R2_LEFT_HP_OUT                     0x02
+#define WM8731_REG_R3_RIGHT_HP_OUT                    0x03
+#define WM8731_REG_R4_ANALOGUE_AUDIO_PATH_CONTROL     0x04
+#define WM8731_REG_R5_DIGITAL_AUDIO_PATH_CONTROL      0x05
+#define WM8731_REG_R6_POWER_DOWN_CONTROL              0x06
+#define WM8731_REG_R7_DIGITAL_AUDIO_INTERFACE_FORMAT  0x07
+#define WM8731_REG_R8_SAMPLING_CONTROL                0x08
+#define WM8731_REG_R9_ACTIVE_CONTROL                  0x09
+#define WM8731_REG_R15_RESET                          0x0f
+
+
+WM8731::WM8731(PinName sda, PinName scl) : _i2c(sda, scl) {
+}
+
+bool WM8731::writeCmd(Register reg, uint16_t data) {
+  char dataToTransfer[2];
+  
+  dataToTransfer[0] = (reg << 1) | ((data & 0x100) >> 8);
+  dataToTransfer[1] = data & 0xff;
+  
+  if (_i2c.write(WM8731_I2C_ADDR, dataToTransfer, 2) == 0) {
+    wait_us(40);
+	return true;
+  }
+  return false;
+}
+
+