Olle Sköld
This demo reads a bitmap from a FAT formatted SD-card, copies it to flash and displays it on the screen. The demo is based on the following project: https://os.mbed.com/users/DieterGraef/code/DISCO-F746NG_SDFileSystem/
Dependencies: LCD_DISCO_F746NG TS_DISCO_F746NG mbed FATFileSystem
Fork of
DISCO-F746NG_SDFileSystem
by 
Dieter Graef
Diff: BSP_DISCO_F746NG/wm8994.c
- Revision:
- 4:95e30a911d97
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/BSP_DISCO_F746NG/wm8994.c Thu Apr 19 19:59:54 2018 +0000
@@ -0,0 +1,924 @@
+/**
+ ******************************************************************************
+ * @file wm8994.c
+ * @author MCD Application Team
+ * @version V2.0.0
+ * @date 24-June-2015
+ * @brief This file provides the WM8994 Audio Codec driver.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "wm8994.h"
+
+/** @addtogroup BSP
+ * @{
+ */
+
+/** @addtogroup Components
+ * @{
+ */
+
+/** @addtogroup wm8994
+ * @brief This file provides a set of functions needed to drive the
+ * WM8994 audio codec.
+ * @{
+ */
+
+/** @defgroup WM8994_Private_Types
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup WM8994_Private_Defines
+ * @{
+ */
+/* Uncomment this line to enable verifying data sent to codec after each write
+ operation (for debug purpose) */
+#if !defined (VERIFY_WRITTENDATA)
+/* #define VERIFY_WRITTENDATA */
+#endif /* VERIFY_WRITTENDATA */
+/**
+ * @}
+ */
+
+/** @defgroup WM8994_Private_Macros
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup WM8994_Private_Variables
+ * @{
+ */
+
+/* Audio codec driver structure initialization */
+AUDIO_DrvTypeDef wm8994_drv =
+{
+ wm8994_Init,
+ wm8994_DeInit,
+ wm8994_ReadID,
+
+ wm8994_Play,
+ wm8994_Pause,
+ wm8994_Resume,
+ wm8994_Stop,
+
+ wm8994_SetFrequency,
+ wm8994_SetVolume,
+ wm8994_SetMute,
+ wm8994_SetOutputMode,
+
+ wm8994_Reset
+};
+
+static uint32_t outputEnabled = 0;
+static uint32_t inputEnabled = 0;
+/**
+ * @}
+ */
+
+/** @defgroup WM8994_Function_Prototypes
+ * @{
+ */
+static uint8_t CODEC_IO_Write(uint8_t Addr, uint16_t Reg, uint16_t Value);
+/**
+ * @}
+ */
+
+/** @defgroup WM8994_Private_Functions
+ * @{
+ */
+
+/**
+ * @brief Initializes the audio codec and the control interface.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param OutputInputDevice: can be OUTPUT_DEVICE_SPEAKER, OUTPUT_DEVICE_HEADPHONE,
+ * OUTPUT_DEVICE_BOTH, OUTPUT_DEVICE_AUTO, INPUT_DEVICE_DIGITAL_MICROPHONE_1,
+ * INPUT_DEVICE_DIGITAL_MICROPHONE_2, INPUT_DEVICE_INPUT_LINE_1 or INPUT_DEVICE_INPUT_LINE_2.
+ * @param Volume: Initial volume level (from 0 (Mute) to 100 (Max))
+ * @param AudioFreq: Audio Frequency
+ * @retval 0 if correct communication, else wrong communication
+ */
+uint32_t wm8994_Init(uint16_t DeviceAddr, uint16_t OutputInputDevice, uint8_t Volume, uint32_t AudioFreq)
+{
+ uint32_t counter = 0;
+ uint16_t output_device = OutputInputDevice & 0xFF;
+ uint16_t input_device = OutputInputDevice & 0xFF00;
+ uint16_t power_mgnt_reg_1 = 0;
+
+ /* Initialize the Control interface of the Audio Codec */
+ AUDIO_IO_Init();
+ /* wm8994 Errata Work-Arounds */
+ counter += CODEC_IO_Write(DeviceAddr, 0x102, 0x0003);
+ counter += CODEC_IO_Write(DeviceAddr, 0x817, 0x0000);
+ counter += CODEC_IO_Write(DeviceAddr, 0x102, 0x0000);
+
+ /* Enable VMID soft start (fast), Start-up Bias Current Enabled */
+ counter += CODEC_IO_Write(DeviceAddr, 0x39, 0x006C);
+
+ /* Enable bias generator, Enable VMID */
+ counter += CODEC_IO_Write(DeviceAddr, 0x01, 0x0003);
+
+ /* Add Delay */
+ AUDIO_IO_Delay(50);
+
+ /* Path Configurations for output */
+ if (output_device > 0)
+ {
+ outputEnabled = 1;
+ switch (output_device)
+ {
+ case OUTPUT_DEVICE_SPEAKER:
+ /* Enable DAC1 (Left), Enable DAC1 (Right),
+ Disable DAC2 (Left), Disable DAC2 (Right)*/
+ counter += CODEC_IO_Write(DeviceAddr, 0x05, 0x0C0C);
+
+ /* Enable the AIF1 Timeslot 0 (Left) to DAC 1 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x601, 0x0000);
+
+ /* Enable the AIF1 Timeslot 0 (Right) to DAC 1 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x602, 0x0000);
+
+ /* Disable the AIF1 Timeslot 1 (Left) to DAC 2 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x604, 0x0002);
+
+ /* Disable the AIF1 Timeslot 1 (Right) to DAC 2 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x605, 0x0002);
+ break;
+
+ case OUTPUT_DEVICE_HEADPHONE:
+ /* Disable DAC1 (Left), Disable DAC1 (Right),
+ Enable DAC2 (Left), Enable DAC2 (Right)*/
+ counter += CODEC_IO_Write(DeviceAddr, 0x05, 0x0303);
+
+ /* Enable the AIF1 Timeslot 0 (Left) to DAC 1 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x601, 0x0001);
+
+ /* Enable the AIF1 Timeslot 0 (Right) to DAC 1 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x602, 0x0001);
+
+ /* Disable the AIF1 Timeslot 1 (Left) to DAC 2 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x604, 0x0000);
+
+ /* Disable the AIF1 Timeslot 1 (Right) to DAC 2 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x605, 0x0000);
+ break;
+
+ case OUTPUT_DEVICE_BOTH:
+ /* Enable DAC1 (Left), Enable DAC1 (Right),
+ also Enable DAC2 (Left), Enable DAC2 (Right)*/
+ counter += CODEC_IO_Write(DeviceAddr, 0x05, 0x0303 | 0x0C0C);
+
+ /* Enable the AIF1 Timeslot 0 (Left) to DAC 1 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x601, 0x0001);
+
+ /* Enable the AIF1 Timeslot 0 (Right) to DAC 1 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x602, 0x0001);
+
+ /* Enable the AIF1 Timeslot 1 (Left) to DAC 2 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x604, 0x0002);
+
+ /* Enable the AIF1 Timeslot 1 (Right) to DAC 2 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x605, 0x0002);
+ break;
+
+ case OUTPUT_DEVICE_AUTO :
+ default:
+ /* Disable DAC1 (Left), Disable DAC1 (Right),
+ Enable DAC2 (Left), Enable DAC2 (Right)*/
+ counter += CODEC_IO_Write(DeviceAddr, 0x05, 0x0303);
+
+ /* Enable the AIF1 Timeslot 0 (Left) to DAC 1 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x601, 0x0001);
+
+ /* Enable the AIF1 Timeslot 0 (Right) to DAC 1 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x602, 0x0001);
+
+ /* Disable the AIF1 Timeslot 1 (Left) to DAC 2 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x604, 0x0000);
+
+ /* Disable the AIF1 Timeslot 1 (Right) to DAC 2 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x605, 0x0000);
+ break;
+ }
+ }
+ else
+ {
+ outputEnabled = 0;
+ }
+
+ /* Path Configurations for input */
+ if (input_device > 0)
+ {
+ inputEnabled = 1;
+ switch (input_device)
+ {
+ case INPUT_DEVICE_DIGITAL_MICROPHONE_2 :
+ /* Enable AIF1ADC2 (Left), Enable AIF1ADC2 (Right)
+ * Enable DMICDAT2 (Left), Enable DMICDAT2 (Right)
+ * Enable Left ADC, Enable Right ADC */
+ counter += CODEC_IO_Write(DeviceAddr, 0x04, 0x0C30);
+
+ /* Enable AIF1 DRC2 Signal Detect & DRC in AIF1ADC2 Left/Right Timeslot 1 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x450, 0x00DB);
+
+ /* Disable IN1L, IN1R, IN2L, IN2R, Enable Thermal sensor & shutdown */
+ counter += CODEC_IO_Write(DeviceAddr, 0x02, 0x6000);
+
+ /* Enable the DMIC2(Left) to AIF1 Timeslot 1 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x608, 0x0002);
+
+ /* Enable the DMIC2(Right) to AIF1 Timeslot 1 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x609, 0x0002);
+
+ /* GPIO1 pin configuration GP1_DIR = output, GP1_FN = AIF1 DRC2 signal detect */
+ counter += CODEC_IO_Write(DeviceAddr, 0x700, 0x000E);
+ break;
+
+ case INPUT_DEVICE_INPUT_LINE_1 :
+ /* Enable AIF1ADC1 (Left), Enable AIF1ADC1 (Right)
+ * Enable Left ADC, Enable Right ADC */
+ counter += CODEC_IO_Write(DeviceAddr, 0x04, 0x0303);
+
+ /* Enable AIF1 DRC1 Signal Detect & DRC in AIF1ADC1 Left/Right Timeslot 0 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x440, 0x00DB);
+
+ /* Enable IN1L and IN1R, Disable IN2L and IN2R, Enable Thermal sensor & shutdown */
+ counter += CODEC_IO_Write(DeviceAddr, 0x02, 0x6350);
+
+ /* Enable the ADCL(Left) to AIF1 Timeslot 0 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x606, 0x0002);
+
+ /* Enable the ADCR(Right) to AIF1 Timeslot 0 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x607, 0x0002);
+
+ /* GPIO1 pin configuration GP1_DIR = output, GP1_FN = AIF1 DRC1 signal detect */
+ counter += CODEC_IO_Write(DeviceAddr, 0x700, 0x000D);
+ break;
+
+ case INPUT_DEVICE_DIGITAL_MICROPHONE_1 :
+ case INPUT_DEVICE_INPUT_LINE_2 :
+ default:
+ /* Actually, no other input devices supported */
+ counter++;
+ break;
+ }
+ }
+ else
+ {
+ inputEnabled = 0;
+ }
+
+ /* Clock Configurations */
+ switch (AudioFreq)
+ {
+ case AUDIO_FREQUENCY_8K:
+ /* AIF1 Sample Rate = 8 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0003);
+ break;
+
+ case AUDIO_FREQUENCY_16K:
+ /* AIF1 Sample Rate = 16 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0033);
+ break;
+
+ case AUDIO_FREQUENCY_48K:
+ /* AIF1 Sample Rate = 48 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0083);
+ break;
+
+ case AUDIO_FREQUENCY_96K:
+ /* AIF1 Sample Rate = 96 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x00A3);
+ break;
+
+ case AUDIO_FREQUENCY_11K:
+ /* AIF1 Sample Rate = 11.025 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0013);
+ break;
+
+ case AUDIO_FREQUENCY_22K:
+ /* AIF1 Sample Rate = 22.050 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0043);
+ break;
+
+ case AUDIO_FREQUENCY_44K:
+ /* AIF1 Sample Rate = 44.1 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0073);
+ break;
+
+ default:
+ /* AIF1 Sample Rate = 48 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0083);
+ break;
+ }
+ /* AIF1 Word Length = 16-bits, AIF1 Format = I2S (Default Register Value) */
+ counter += CODEC_IO_Write(DeviceAddr, 0x300, 0x4010);
+
+ /* slave mode */
+ counter += CODEC_IO_Write(DeviceAddr, 0x302, 0x0000);
+
+ /* Enable the DSP processing clock for AIF1, Enable the core clock */
+ counter += CODEC_IO_Write(DeviceAddr, 0x208, 0x000A);
+
+ /* Enable AIF1 Clock, AIF1 Clock Source = MCLK1 pin */
+ counter += CODEC_IO_Write(DeviceAddr, 0x200, 0x0001);
+
+ if (output_device > 0) /* Audio output selected */
+ {
+ /* Analog Output Configuration */
+
+ /* Enable SPKRVOL PGA, Enable SPKMIXR, Enable SPKLVOL PGA, Enable SPKMIXL */
+ counter += CODEC_IO_Write(DeviceAddr, 0x03, 0x0300);
+
+ /* Left Speaker Mixer Volume = 0dB */
+ counter += CODEC_IO_Write(DeviceAddr, 0x22, 0x0000);
+
+ /* Speaker output mode = Class D, Right Speaker Mixer Volume = 0dB ((0x23, 0x0100) = class AB)*/
+ counter += CODEC_IO_Write(DeviceAddr, 0x23, 0x0000);
+
+ /* Unmute DAC2 (Left) to Left Speaker Mixer (SPKMIXL) path,
+ Unmute DAC2 (Right) to Right Speaker Mixer (SPKMIXR) path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x36, 0x0300);
+
+ /* Enable bias generator, Enable VMID, Enable SPKOUTL, Enable SPKOUTR */
+ counter += CODEC_IO_Write(DeviceAddr, 0x01, 0x3003);
+
+ /* Headphone/Speaker Enable */
+
+ /* Enable Class W, Class W Envelope Tracking = AIF1 Timeslot 0 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x51, 0x0005);
+
+ /* Enable bias generator, Enable VMID, Enable HPOUT1 (Left) and Enable HPOUT1 (Right) input stages */
+ /* idem for Speaker */
+ power_mgnt_reg_1 |= 0x0303 | 0x3003;
+ counter += CODEC_IO_Write(DeviceAddr, 0x01, power_mgnt_reg_1);
+
+ /* Enable HPOUT1 (Left) and HPOUT1 (Right) intermediate stages */
+ counter += CODEC_IO_Write(DeviceAddr, 0x60, 0x0022);
+
+ /* Enable Charge Pump */
+ counter += CODEC_IO_Write(DeviceAddr, 0x4C, 0x9F25);
+
+ /* Add Delay */
+ AUDIO_IO_Delay(15);
+
+ /* Select DAC1 (Left) to Left Headphone Output PGA (HPOUT1LVOL) path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x2D, 0x0001);
+
+ /* Select DAC1 (Right) to Right Headphone Output PGA (HPOUT1RVOL) path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x2E, 0x0001);
+
+ /* Enable Left Output Mixer (MIXOUTL), Enable Right Output Mixer (MIXOUTR) */
+ /* idem for SPKOUTL and SPKOUTR */
+ counter += CODEC_IO_Write(DeviceAddr, 0x03, 0x0030 | 0x0300);
+
+ /* Enable DC Servo and trigger start-up mode on left and right channels */
+ counter += CODEC_IO_Write(DeviceAddr, 0x54, 0x0033);
+
+ /* Add Delay */
+ AUDIO_IO_Delay(250);
+
+ /* Enable HPOUT1 (Left) and HPOUT1 (Right) intermediate and output stages. Remove clamps */
+ counter += CODEC_IO_Write(DeviceAddr, 0x60, 0x00EE);
+
+ /* Unmutes */
+
+ /* Unmute DAC 1 (Left) */
+ counter += CODEC_IO_Write(DeviceAddr, 0x610, 0x00C0);
+
+ /* Unmute DAC 1 (Right) */
+ counter += CODEC_IO_Write(DeviceAddr, 0x611, 0x00C0);
+
+ /* Unmute the AIF1 Timeslot 0 DAC path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x420, 0x0000);
+
+ /* Unmute DAC 2 (Left) */
+ counter += CODEC_IO_Write(DeviceAddr, 0x612, 0x00C0);
+
+ /* Unmute DAC 2 (Right) */
+ counter += CODEC_IO_Write(DeviceAddr, 0x613, 0x00C0);
+
+ /* Unmute the AIF1 Timeslot 1 DAC2 path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x422, 0x0000);
+
+ /* Volume Control */
+ wm8994_SetVolume(DeviceAddr, Volume);
+ }
+
+ if (input_device > 0) /* Audio input selected */
+ {
+ if ((input_device == INPUT_DEVICE_DIGITAL_MICROPHONE_1) || (input_device == INPUT_DEVICE_DIGITAL_MICROPHONE_2))
+ {
+ /* Enable Microphone bias 1 generator, Enable VMID */
+ power_mgnt_reg_1 |= 0x0013;
+ counter += CODEC_IO_Write(DeviceAddr, 0x01, power_mgnt_reg_1);
+
+ /* ADC oversample enable */
+ counter += CODEC_IO_Write(DeviceAddr, 0x620, 0x0002);
+
+ /* AIF ADC2 HPF enable, HPF cut = voice mode 1 fc=127Hz at fs=8kHz */
+ counter += CODEC_IO_Write(DeviceAddr, 0x411, 0x3800);
+ }
+ else if ((input_device == INPUT_DEVICE_INPUT_LINE_1) || (input_device == INPUT_DEVICE_INPUT_LINE_2))
+ {
+ /* Enable normal bias generator, Enable VMID */
+ power_mgnt_reg_1 |= 0x0003;
+ counter += CODEC_IO_Write(DeviceAddr, 0x01, power_mgnt_reg_1);
+
+ /* Disable mute on IN1L, IN1L Volume = +0dB */
+ counter += CODEC_IO_Write(DeviceAddr, 0x18, 0x000B);
+
+ /* Disable mute on IN1R, IN1R Volume = +0dB */
+ counter += CODEC_IO_Write(DeviceAddr, 0x1A, 0x000B);
+
+ /* Disable mute on IN1L_TO_MIXINL, Gain = +0dB */
+ counter += CODEC_IO_Write(DeviceAddr, 0x29, 0x0025);
+
+ /* Disable mute on IN1R_TO_MIXINL, Gain = +0dB */
+ counter += CODEC_IO_Write(DeviceAddr, 0x2A, 0x0025);
+
+ /* IN1LN_TO_IN1L, IN1LP_TO_VMID, IN1RN_TO_IN1R, IN1RP_TO_VMID */
+ counter += CODEC_IO_Write(DeviceAddr, 0x28, 0x0011);
+
+ /* AIF ADC1 HPF enable, HPF cut = hifi mode fc=4Hz at fs=48kHz */
+ counter += CODEC_IO_Write(DeviceAddr, 0x410, 0x1800);
+ }
+ /* Volume Control */
+ wm8994_SetVolume(DeviceAddr, Volume);
+ }
+ /* Return communication control value */
+ return counter;
+}
+
+/**
+ * @brief Deinitializes the audio codec.
+ * @param None
+ * @retval None
+ */
+void wm8994_DeInit(void)
+{
+ /* Deinitialize Audio Codec interface */
+ AUDIO_IO_DeInit();
+}
+
+/**
+ * @brief Get the WM8994 ID.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval The WM8994 ID
+ */
+uint32_t wm8994_ReadID(uint16_t DeviceAddr)
+{
+ /* Initialize the Control interface of the Audio Codec */
+ AUDIO_IO_Init();
+
+ return ((uint32_t)AUDIO_IO_Read(DeviceAddr, WM8994_CHIPID_ADDR));
+}
+
+/**
+ * @brief Start the audio Codec play feature.
+ * @note For this codec no Play options are required.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval 0 if correct communication, else wrong communication
+ */
+uint32_t wm8994_Play(uint16_t DeviceAddr, uint16_t* pBuffer, uint16_t Size)
+{
+ uint32_t counter = 0;
+
+ /* Resumes the audio file playing */
+ /* Unmute the output first */
+ counter += wm8994_SetMute(DeviceAddr, AUDIO_MUTE_OFF);
+
+ return counter;
+}
+
+/**
+ * @brief Pauses playing on the audio codec.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval 0 if correct communication, else wrong communication
+ */
+uint32_t wm8994_Pause(uint16_t DeviceAddr)
+{
+ uint32_t counter = 0;
+
+ /* Pause the audio file playing */
+ /* Mute the output first */
+ counter += wm8994_SetMute(DeviceAddr, AUDIO_MUTE_ON);
+
+ /* Put the Codec in Power save mode */
+ counter += CODEC_IO_Write(DeviceAddr, 0x02, 0x01);
+
+ return counter;
+}
+
+/**
+ * @brief Resumes playing on the audio codec.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval 0 if correct communication, else wrong communication
+ */
+uint32_t wm8994_Resume(uint16_t DeviceAddr)
+{
+ uint32_t counter = 0;
+
+ /* Resumes the audio file playing */
+ /* Unmute the output first */
+ counter += wm8994_SetMute(DeviceAddr, AUDIO_MUTE_OFF);
+
+ return counter;
+}
+
+/**
+ * @brief Stops audio Codec playing. It powers down the codec.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param CodecPdwnMode: selects the power down mode.
+ * - CODEC_PDWN_SW: only mutes the audio codec. When resuming from this
+ * mode the codec keeps the previous initialization
+ * (no need to re-Initialize the codec registers).
+ * - CODEC_PDWN_HW: Physically power down the codec. When resuming from this
+ * mode, the codec is set to default configuration
+ * (user should re-Initialize the codec in order to
+ * play again the audio stream).
+ * @retval 0 if correct communication, else wrong communication
+ */
+uint32_t wm8994_Stop(uint16_t DeviceAddr, uint32_t CodecPdwnMode)
+{
+ uint32_t counter = 0;
+
+ if (outputEnabled != 0)
+ {
+ /* Mute the output first */
+ counter += wm8994_SetMute(DeviceAddr, AUDIO_MUTE_ON);
+
+ if (CodecPdwnMode == CODEC_PDWN_SW)
+ {
+ /* Only output mute required*/
+ }
+ else /* CODEC_PDWN_HW */
+ {
+ /* Mute the AIF1 Timeslot 0 DAC1 path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x420, 0x0200);
+
+ /* Mute the AIF1 Timeslot 1 DAC2 path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x422, 0x0200);
+
+ /* Disable DAC1L_TO_HPOUT1L */
+ counter += CODEC_IO_Write(DeviceAddr, 0x2D, 0x0000);
+
+ /* Disable DAC1R_TO_HPOUT1R */
+ counter += CODEC_IO_Write(DeviceAddr, 0x2E, 0x0000);
+
+ /* Disable DAC1 and DAC2 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x05, 0x0000);
+
+ /* Reset Codec by writing in 0x0000 address register */
+ counter += CODEC_IO_Write(DeviceAddr, 0x0000, 0x0000);
+
+ outputEnabled = 0;
+ }
+ }
+ return counter;
+}
+
+/**
+ * @brief Sets higher or lower the codec volume level.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param Volume: a byte value from 0 to 255 (refer to codec registers
+ * description for more details).
+ * @retval 0 if correct communication, else wrong communication
+ */
+uint32_t wm8994_SetVolume(uint16_t DeviceAddr, uint8_t Volume)
+{
+ uint32_t counter = 0;
+ uint8_t convertedvol = VOLUME_CONVERT(Volume);
+
+ /* Output volume */
+ if (outputEnabled != 0)
+ {
+ if(convertedvol > 0x3E)
+ {
+ /* Unmute audio codec */
+ counter += wm8994_SetMute(DeviceAddr, AUDIO_MUTE_OFF);
+
+ /* Left Headphone Volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x1C, 0x3F | 0x140);
+
+ /* Right Headphone Volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x1D, 0x3F | 0x140);
+
+ /* Left Speaker Volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x26, 0x3F | 0x140);
+
+ /* Right Speaker Volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x27, 0x3F | 0x140);
+ }
+ else if (Volume == 0)
+ {
+ /* Mute audio codec */
+ counter += wm8994_SetMute(DeviceAddr, AUDIO_MUTE_ON);
+ }
+ else
+ {
+ /* Unmute audio codec */
+ counter += wm8994_SetMute(DeviceAddr, AUDIO_MUTE_OFF);
+
+ /* Left Headphone Volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x1C, convertedvol | 0x140);
+
+ /* Right Headphone Volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x1D, convertedvol | 0x140);
+
+ /* Left Speaker Volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x26, convertedvol | 0x140);
+
+ /* Right Speaker Volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x27, convertedvol | 0x140);
+ }
+ }
+
+ /* Input volume */
+ if (inputEnabled != 0)
+ {
+ convertedvol = VOLUME_IN_CONVERT(Volume);
+
+ /* Left AIF1 ADC1 volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x400, convertedvol | 0x100);
+
+ /* Right AIF1 ADC1 volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x401, convertedvol | 0x100);
+
+ /* Left AIF1 ADC2 volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x404, convertedvol | 0x100);
+
+ /* Right AIF1 ADC2 volume */
+ counter += CODEC_IO_Write(DeviceAddr, 0x405, convertedvol | 0x100);
+ }
+ return counter;
+}
+
+/**
+ * @brief Enables or disables the mute feature on the audio codec.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param Cmd: AUDIO_MUTE_ON to enable the mute or AUDIO_MUTE_OFF to disable the
+ * mute mode.
+ * @retval 0 if correct communication, else wrong communication
+ */
+uint32_t wm8994_SetMute(uint16_t DeviceAddr, uint32_t Cmd)
+{
+ uint32_t counter = 0;
+
+ if (outputEnabled != 0)
+ {
+ /* Set the Mute mode */
+ if(Cmd == AUDIO_MUTE_ON)
+ {
+ /* Soft Mute the AIF1 Timeslot 0 DAC1 path L&R */
+ counter += CODEC_IO_Write(DeviceAddr, 0x420, 0x0200);
+
+ /* Soft Mute the AIF1 Timeslot 1 DAC2 path L&R */
+ counter += CODEC_IO_Write(DeviceAddr, 0x422, 0x0200);
+ }
+ else /* AUDIO_MUTE_OFF Disable the Mute */
+ {
+ /* Unmute the AIF1 Timeslot 0 DAC1 path L&R */
+ counter += CODEC_IO_Write(DeviceAddr, 0x420, 0x0000);
+
+ /* Unmute the AIF1 Timeslot 1 DAC2 path L&R */
+ counter += CODEC_IO_Write(DeviceAddr, 0x422, 0x0000);
+ }
+ }
+ return counter;
+}
+
+/**
+ * @brief Switch dynamically (while audio file is played) the output target
+ * (speaker or headphone).
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param Output: specifies the audio output target: OUTPUT_DEVICE_SPEAKER,
+ * OUTPUT_DEVICE_HEADPHONE, OUTPUT_DEVICE_BOTH or OUTPUT_DEVICE_AUTO
+ * @retval 0 if correct communication, else wrong communication
+ */
+uint32_t wm8994_SetOutputMode(uint16_t DeviceAddr, uint8_t Output)
+{
+ uint32_t counter = 0;
+
+ switch (Output)
+ {
+ case OUTPUT_DEVICE_SPEAKER:
+ /* Enable DAC1 (Left), Enable DAC1 (Right),
+ Disable DAC2 (Left), Disable DAC2 (Right)*/
+ counter += CODEC_IO_Write(DeviceAddr, 0x05, 0x0C0C);
+
+ /* Enable the AIF1 Timeslot 0 (Left) to DAC 1 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x601, 0x0000);
+
+ /* Enable the AIF1 Timeslot 0 (Right) to DAC 1 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x602, 0x0000);
+
+ /* Disable the AIF1 Timeslot 1 (Left) to DAC 2 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x604, 0x0002);
+
+ /* Disable the AIF1 Timeslot 1 (Right) to DAC 2 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x605, 0x0002);
+ break;
+
+ case OUTPUT_DEVICE_HEADPHONE:
+ /* Disable DAC1 (Left), Disable DAC1 (Right),
+ Enable DAC2 (Left), Enable DAC2 (Right)*/
+ counter += CODEC_IO_Write(DeviceAddr, 0x05, 0x0303);
+
+ /* Enable the AIF1 Timeslot 0 (Left) to DAC 1 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x601, 0x0001);
+
+ /* Enable the AIF1 Timeslot 0 (Right) to DAC 1 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x602, 0x0001);
+
+ /* Disable the AIF1 Timeslot 1 (Left) to DAC 2 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x604, 0x0000);
+
+ /* Disable the AIF1 Timeslot 1 (Right) to DAC 2 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x605, 0x0000);
+ break;
+
+ case OUTPUT_DEVICE_BOTH:
+ /* Enable DAC1 (Left), Enable DAC1 (Right),
+ also Enable DAC2 (Left), Enable DAC2 (Right)*/
+ counter += CODEC_IO_Write(DeviceAddr, 0x05, 0x0303 | 0x0C0C);
+
+ /* Enable the AIF1 Timeslot 0 (Left) to DAC 1 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x601, 0x0001);
+
+ /* Enable the AIF1 Timeslot 0 (Right) to DAC 1 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x602, 0x0001);
+
+ /* Enable the AIF1 Timeslot 1 (Left) to DAC 2 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x604, 0x0002);
+
+ /* Enable the AIF1 Timeslot 1 (Right) to DAC 2 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x605, 0x0002);
+ break;
+
+ default:
+ /* Disable DAC1 (Left), Disable DAC1 (Right),
+ Enable DAC2 (Left), Enable DAC2 (Right)*/
+ counter += CODEC_IO_Write(DeviceAddr, 0x05, 0x0303);
+
+ /* Enable the AIF1 Timeslot 0 (Left) to DAC 1 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x601, 0x0001);
+
+ /* Enable the AIF1 Timeslot 0 (Right) to DAC 1 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x602, 0x0001);
+
+ /* Disable the AIF1 Timeslot 1 (Left) to DAC 2 (Left) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x604, 0x0000);
+
+ /* Disable the AIF1 Timeslot 1 (Right) to DAC 2 (Right) mixer path */
+ counter += CODEC_IO_Write(DeviceAddr, 0x605, 0x0000);
+ break;
+ }
+ return counter;
+}
+
+/**
+ * @brief Sets new frequency.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param AudioFreq: Audio frequency used to play the audio stream.
+ * @retval 0 if correct communication, else wrong communication
+ */
+uint32_t wm8994_SetFrequency(uint16_t DeviceAddr, uint32_t AudioFreq)
+{
+ uint32_t counter = 0;
+
+ /* Clock Configurations */
+ switch (AudioFreq)
+ {
+ case AUDIO_FREQUENCY_8K:
+ /* AIF1 Sample Rate = 8 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0003);
+ break;
+
+ case AUDIO_FREQUENCY_16K:
+ /* AIF1 Sample Rate = 16 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0033);
+ break;
+
+ case AUDIO_FREQUENCY_48K:
+ /* AIF1 Sample Rate = 48 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0083);
+ break;
+
+ case AUDIO_FREQUENCY_96K:
+ /* AIF1 Sample Rate = 96 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x00A3);
+ break;
+
+ case AUDIO_FREQUENCY_11K:
+ /* AIF1 Sample Rate = 11.025 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0013);
+ break;
+
+ case AUDIO_FREQUENCY_22K:
+ /* AIF1 Sample Rate = 22.050 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0043);
+ break;
+
+ case AUDIO_FREQUENCY_44K:
+ /* AIF1 Sample Rate = 44.1 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0073);
+ break;
+
+ default:
+ /* AIF1 Sample Rate = 48 (KHz), ratio=256 */
+ counter += CODEC_IO_Write(DeviceAddr, 0x210, 0x0083);
+ break;
+ }
+ return counter;
+}
+
+/**
+ * @brief Resets wm8994 registers.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval 0 if correct communication, else wrong communication
+ */
+uint32_t wm8994_Reset(uint16_t DeviceAddr)
+{
+ uint32_t counter = 0;
+
+ /* Reset Codec by writing in 0x0000 address register */
+ counter = CODEC_IO_Write(DeviceAddr, 0x0000, 0x0000);
+ outputEnabled = 0;
+ inputEnabled=0;
+
+ return counter;
+}
+
+/**
+ * @brief Writes/Read a single data.
+ * @param Addr: I2C address
+ * @param Reg: Reg address
+ * @param Value: Data to be written
+ * @retval None
+ */
+static uint8_t CODEC_IO_Write(uint8_t Addr, uint16_t Reg, uint16_t Value)
+{
+ uint32_t result = 0;
+
+ AUDIO_IO_Write(Addr, Reg, Value);
+
+#ifdef VERIFY_WRITTENDATA
+ /* Verify that the data has been correctly written */
+ result = (AUDIO_IO_Read(Addr, Reg) == Value)? 0:1;
+#endif /* VERIFY_WRITTENDATA */
+
+ return result;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/