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Diffstat (limited to 'thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Utilities/STM32_EVAL/STM32L152D_EVAL/stm32l152d_eval_audio_codec.c')
| -rw-r--r-- | thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Utilities/STM32_EVAL/STM32L152D_EVAL/stm32l152d_eval_audio_codec.c | 1489 |
1 files changed, 1489 insertions, 0 deletions
diff --git a/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Utilities/STM32_EVAL/STM32L152D_EVAL/stm32l152d_eval_audio_codec.c b/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Utilities/STM32_EVAL/STM32L152D_EVAL/stm32l152d_eval_audio_codec.c new file mode 100644 index 0000000..4fad206 --- /dev/null +++ b/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Utilities/STM32_EVAL/STM32L152D_EVAL/stm32l152d_eval_audio_codec.c @@ -0,0 +1,1489 @@ +/** + ****************************************************************************** + * @file stm32l152d_eval_audio_codec.c + * @author MCD Application Team + * @version V1.0.1 + * @date 09-March-2012 + * @brief This file includes the low layer driver for CS43L22 Audio Codec + * mounted on STM32L152D-EVAL board. + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT 2012 STMicroelectronics</center></h2> + * + * Licensed under MCD-ST Liberty SW License Agreement V2, (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.st.com/software_license_agreement_liberty_v2 + * + * 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. + * + ****************************************************************************** + */ + +/*============================================================================================================================== + User NOTES +1. How To use this driver: +-------------------------- + - This driver supports STM32L1xx devices on STM32L152D-EVAL Evaluation boards. + + - Configure the options in file stm32l152d_eval_audio_codec.h in the section CONFIGURATION. + Refer to the sections 2 and 3 to have more details on the possible configurations. + + - Call the function EVAL_AUDIO_Init( + OutputDevice: physical output mode (OUTPUT_DEVICE_SPEAKER, + OUTPUT_DEVICE_HEADPHONE, OUTPUT_DEVICE_AUTO or + OUTPUT_DEVICE_BOTH) + Volume: intial volume to be set (0 is min (mute), 100 is max (100%) + AudioFreq: Audio frequency in Hz (8000, 16000, 22500, 32000 ...) + this parameter is relative to the audio file/stream type. + ) + This function configures all the hardware required for the audio application (codec, I2C, I2S, + GPIOs, DMA and interrupt if needed). This function returns 0 if configuration is OK. + if the returned value is different from 0 or the function is stuck then the communication with + the codec or the IOExpander has failed (try to unplug the power or reset device in this case). + + OUTPUT_DEVICE_SPEAKER: only speaker will be set as output for the audio stream. + + OUTPUT_DEVICE_HEADPHONE: only headphones will be set as output for the audio stream. + + OUTPUT_DEVICE_AUTO: Selection of output device is made through external switch (implemented + into the audio jack on the evaluation board). When the Headphone is connected it is used + as output. When the headphone is disconnected from tha audio jack, the output is + automatically switched to Speaker. + + OUTPUT_DEVICE_BOTH: both Speaker and Headphone are used as outputs for the audio stream + at the same time. + + - Call the function EVAL_AUDIO_Play( + pBuffer: pointer to the audio data file address + Size: size of the buffer to be sent in Bytes + ) + to start playing (for the first time) from the audio file/stream. + + - Call the function EVAL_AUDIO_PauseResume( + Cmd: AUDIO_PAUSE (or 0) to pause playing or AUDIO_RESUME (or + any value different from 0) to resume palying. + ) + Note. After calling EVAL_AUDIO_PauseResume() function for pause, only EVAL_AUDIO_PauseResume() should be called + for resume (it is not allowed to call EVAL_AUDIO_Play() in this case). + Note. This function should be called only when the audio file is played or paused (not stopped). + + - For each mode, you may need to implement the relative callback functions into your code. + The Callback functions are named EVAL_AUDIO_XXX_CallBack() and only their prototypes are declared in + the stm324xg_eval_audio_codec.h file. (refer to the example for more details on the callbacks implementations) + + - To Stop playing, to modify the volume level or to mute, use the functions + EVAL_AUDIO_Stop(), EVAL_AUDIO_VolumeCtl() and EVAL_AUDIO_Mute(). + + - The driver API and the callback functions are at the end of the stm324xg_eval_audio_codec.h file. + + + Driver architecture: + -------------------- + This driver is composed of three main layers: + o High Audio Layer: consists of the function API exported in the stm324xg_eval_audio_codec.h file + (EVAL_AUDIO_Init(), EVAL_AUDIO_Play() ...) + o Codec Control layer: consists of the functions API controlling the audio codec (CS43L22) and + included as local functions in file stm324xg_eval_audio_codec.c (Codec_Init(), Codec_Play() ...) + o Media Access Layer (MAL): which consists of functions allowing to access the media containing/ + providing the audio file/stream. These functions are also included as local functions into + the stm324xg_eval_audio_codec.c file (Audio_MAL_Init(), Audio_MAL_Play() ...) + Each set of functions (layer) may be implemented independently of the others and customized when + needed. + +2. Modes description: +--------------------- + + AUDIO_MAL_MODE_NORMAL : is suitable when the audio file is in a memory location. + + AUDIO_MAL_MODE_CIRCULAR: is suitable when the audio data are read either from a + memory location or from a device at real time (double buffer could be used). + +3. DMA interrupts description: +------------------------------ + + EVAL_AUDIO_IT_TC_ENABLE: Enable this define to use the DMA end of transfer interrupt. + then, a callback should be implemented by user to perform specific actions + when the DMA has finished the transfer. + + EVAL_AUDIO_IT_HT_ENABLE: Enable this define to use the DMA end of half transfer interrupt. + then, a callback should be implemented by user to perform specific actions + when the DMA has reached the half of the buffer transfer (generally, it is useful + to load the first half of buffer while DMA is loading from the second half). + + EVAL_AUDIO_IT_ER_ENABLE: Enable this define to manage the cases of error on DMA transfer. + +4. Known Limitations: +--------------------- + 1- When using the Speaker, if the audio file quality is not high enough, the speaker output + may produce high and uncomfortable noise level. To avoid this issue, to use speaker + output properly, try to increase audio file sampling rate (typically higher than 48KHz). + This operation will lead to larger file size. + 2- Communication with the audio codec (through I2C) may be corrupted if it is interrupted by some + user interrupt routines (in this case, interrupts could be disabled just before the start of + communication then re-enabled when it is over). Note that this communication is only done at + the configuration phase (EVAL_AUDIO_Init() or EVAL_AUDIO_Stop()) and when Volume control modification is + performed (EVAL_AUDIO_VolumeCtl() or EVAL_AUDIO_Mute()). When the audio data is played, no communication is + required with the audio codec. + 3- Parsing of audio file is not implemented (in order to determine audio file properties: Mono/Stereo, Data size, + File size, Audio Frequency, Audio Data header size ...). The configuration is fixed for the given audio file. + 4- Mono audio streaming is not supported (in order to play mono audio streams, each data should be sent twice + on the I2S or should be duplicated on the source buffer. Or convert the stream in stereo before playing). + 5- Supports only 16-bit audio data size. +===============================================================================================================================*/ + + +/* Includes ------------------------------------------------------------------*/ +#include "stm32l152d_eval_audio_codec.h" + +/** @addtogroup Utilities + * @{ + */ + +/** @addtogroup STM32_EVAL + * @{ + */ + +/** @addtogroup STM32L152D_EVAL + * @{ + */ + +/** @addtogroup STM32L152D_EVAL_AUDIO_CODEC + * @brief This file includes the low layer driver for CS43L22 Audio Codec + * available on STM32L152D-EVAL Eval. + * @{ + */ + +/** @defgroup STM32L152D_EVAL_AUDIO_CODEC_Private_Types + * @{ + */ +/** + * @} + */ + +/** @defgroup STM32L152D_EVAL_AUDIO_CODEC_Private_Defines + * @{ + */ + +/* Mask for the bit EN of the I2S CFGR register */ +#define I2S_ENABLE_MASK 0x0400 + +/* Delay for the Codec to be correctly reset */ +#define CODEC_RESET_DELAY 0x4FFF + +/* Codec audio Standards */ +#ifdef I2S_STANDARD_PHILLIPS +#define CODEC_STANDARD 0x04 +#define I2S_STANDARD I2S_Standard_Phillips +#elif defined(I2S_STANDARD_MSB) +#define CODEC_STANDARD 0x00 +#define I2S_STANDARD I2S_Standard_MSB +#elif defined(I2S_STANDARD_LSB) +#define CODEC_STANDARD 0x08 +#define I2S_STANDARD I2S_Standard_LSB +#else +#error "Error: No audio communication standard selected !" +#endif /* I2S_STANDARD */ + +/* The 7 bits Codec address (sent through I2C interface) */ +#define CODEC_ADDRESS 0x94 /* b00100111 */ +/** + * @} + */ + +/** @defgroup STM32L152D_EVAL_AUDIO_CODEC_Private_Macros + * @{ + */ +/** + * @} + */ + +/** @defgroup STM32L152D_EVAL_AUDIO_CODEC_Private_Variables + * @{ + */ +/* This structure is declared global because it is handled by two different functions */ +static DMA_InitTypeDef DMA_InitStructure; + +DMA_InitTypeDef AUDIO_MAL_DMA_InitStructure; + +uint32_t AudioTotalSize = 0xFFFF; /* This variable holds the total size of the audio file */ +uint32_t AudioRemSize = 0xFFFF; /* This variable holds the remaining data in audio file */ +uint16_t *CurrentPos; /* This variable holds the current position of audio pointer */ + +__IO uint32_t CODECTimeout = CODEC_LONG_TIMEOUT; +__IO uint8_t OutputDev = 0; + +__IO uint32_t CurrAudioInterface = AUDIO_INTERFACE_I2S; +/** + * @} + */ + +/** @defgroup STM32L152D_EVAL_AUDIO_CODEC_Private_Function_Prototypes + * @{ + */ +/** + * @} + */ + +/** @defgroup STM32L152D_EVAL_AUDIO_CODEC_Private_Functions + * @{ + */ +static void Audio_MAL_IRQHandler(void); +/*----------------------------------- +Audio Codec functions +------------------------------------------*/ +/* High Layer codec functions */ +static uint32_t Codec_Init(uint16_t OutputDevice, uint8_t Volume, uint32_t AudioFreq); +static uint32_t Codec_DeInit(void); +static uint32_t Codec_Play(void); +static uint32_t Codec_PauseResume(uint32_t Cmd); +static uint32_t Codec_Stop(uint32_t Cmd); +static uint32_t Codec_VolumeCtrl(uint8_t Volume); +static uint32_t Codec_Mute(uint32_t Cmd); +/* Low layer codec functions */ +static void Codec_CtrlInterface_Init(void); +static void Codec_CtrlInterface_DeInit(void); +static void Codec_AudioInterface_Init(uint32_t AudioFreq); +static void Codec_AudioInterface_DeInit(void); +static void Codec_Reset(void); +static uint32_t Codec_WriteRegister(uint8_t RegisterAddr, uint8_t RegisterValue); +static uint32_t Codec_ReadRegister(uint8_t RegisterAddr); +static void Codec_GPIO_Init(void); +static void Codec_GPIO_DeInit(void); +static void Delay(__IO uint32_t nCount); +/*----------------------------------------------------------------------------*/ + +/*----------------------------------- +MAL (Media Access Layer) functions +------------------------------------------*/ +/* Peripherals configuration functions */ +static void Audio_MAL_Init(void); +static void Audio_MAL_DeInit(void); +static void Audio_MAL_Play(uint32_t Addr, uint32_t Size); +static void Audio_MAL_PauseResume(uint32_t Cmd, uint32_t Addr); +static void Audio_MAL_Stop(void); + +/*----------------------------------------------------------------------------*/ + +/* DMA Channel definitions */ +DMA_Channel_TypeDef* AUDIO_MAL_DMA_CHANNEL = AUDIO_I2S_DMA_CHANNEL; +uint32_t AUDIO_MAL_DMA_CLOCK = AUDIO_I2S_DMA_CLOCK; +uint32_t AUDIO_MAL_DMA_DREG = AUDIO_I2S_DMA_DREG; +uint32_t AUDIO_MAL_DMA_IRQ = AUDIO_I2S_DMA_IRQ; +uint32_t AUDIO_MAL_DMA_FLAG_TC = AUDIO_I2S_DMA_FLAG_TC; +uint32_t AUDIO_MAL_DMA_FLAG_HT = AUDIO_I2S_DMA_FLAG_HT; +uint32_t AUDIO_MAL_DMA_FLAG_TE = AUDIO_I2S_DMA_FLAG_TE; + + +/** + * @brief Set the current audio interface (I2S). + * @param Interface: AUDIO_INTERFACE_I2S + * @retval None + */ +void EVAL_AUDIO_SetAudioInterface(uint32_t Interface) +{ + CurrAudioInterface = Interface; + + if (CurrAudioInterface == AUDIO_INTERFACE_I2S) + { + /* DMA Channel definitions */ + AUDIO_MAL_DMA_CLOCK = AUDIO_I2S_DMA_CLOCK; + AUDIO_MAL_DMA_DREG = AUDIO_I2S_DMA_DREG; + AUDIO_MAL_DMA_CHANNEL = AUDIO_I2S_DMA_CHANNEL; + AUDIO_MAL_DMA_IRQ = AUDIO_I2S_DMA_IRQ ; + AUDIO_MAL_DMA_FLAG_TC = AUDIO_I2S_DMA_FLAG_TC; + AUDIO_MAL_DMA_FLAG_HT = AUDIO_I2S_DMA_FLAG_HT; + AUDIO_MAL_DMA_FLAG_TE = AUDIO_I2S_DMA_FLAG_TE; + } +} + +/** + * @brief Configure the audio peripherals. + * @param OutputDevice: OUTPUT_DEVICE_SPEAKER, OUTPUT_DEVICE_HEADPHONE, + * OUTPUT_DEVICE_BOTH or OUTPUT_DEVICE_AUTO . + * @param Volume: Initial volume level (from 0 (Mute) to 100 (Max)) + * @param AudioFreq: Audio frequency used to play the audio stream. + * @retval 0 if correct communication, else wrong communication + */ +uint32_t EVAL_AUDIO_Init(uint16_t OutputDevice, uint8_t Volume, uint32_t AudioFreq) +{ + /* Perform low layer Codec initialization */ + if (Codec_Init(OutputDevice, VOLUME_CONVERT(Volume), AudioFreq) != 0) + { + return 1; + } + else + { + /* I2S data transfer preparation: + Prepare the Media to be used for the audio transfer from memory to I2S peripheral */ + Audio_MAL_Init(); + + /* Return 0 when all operations are OK */ + return 0; + } +} + +/** + * @brief Deinitializes all the resources used by the codec (those initialized + * by EVAL_AUDIO_Init() function). + * @param None + * @retval 0 if correct communication, else wrong communication + */ +uint32_t EVAL_AUDIO_DeInit(void) +{ + /* DeInitialize the Media layer */ + Audio_MAL_DeInit(); + + /* DeInitialize Codec */ + Codec_DeInit(); + + return 0; +} + +/** + * @brief Starts playing audio stream from a data buffer for a determined size. + * @param pBuffer: Pointer to the buffer + * @param Size: Number of audio data BYTES. + * @retval 0 if correct communication, else wrong communication + */ +uint32_t EVAL_AUDIO_Play(uint16_t* pBuffer, uint32_t Size) +{ + /* Set the total number of data to be played (count in half-word) */ + AudioTotalSize = Size/2; + + /* Call the audio Codec Play function */ + Codec_Play(); + + /* Update the Media layer and enable it for play */ + Audio_MAL_Play((uint32_t)pBuffer, (uint32_t)(DMA_MAX(AudioTotalSize / 2))); + + /* Update the remaining number of data to be played */ + AudioRemSize = (Size/2) - DMA_MAX(AudioTotalSize); + + /* Update the current audio pointer position */ + CurrentPos = pBuffer + DMA_MAX(AudioTotalSize); + + return 0; +} + +/** + * @brief This function Pauses or Resumes the audio file stream. In case + * of using DMA, the DMA Pause feature is used. In all cases the I2S + * peripheral is disabled. + * + * @WARNING When calling EVAL_AUDIO_PauseResume() function for pause, only + * this function should be called for resume (use of EVAL_AUDIO_Play() + * function for resume could lead to unexpected behavior). + * + * @param Cmd: AUDIO_PAUSE (or 0) to pause, AUDIO_RESUME (or any value different + * from 0) to resume. + * @retval 0 if correct communication, else wrong communication + */ +uint32_t EVAL_AUDIO_PauseResume(uint32_t Cmd) +{ + /* Call the Audio Codec Pause/Resume function */ + if (Codec_PauseResume(Cmd) != 0) + { + return 1; + } + else + { + /* Call the Media layer pause/resume function */ + Audio_MAL_PauseResume(Cmd, 0); + + /* Return 0 if all operations are OK */ + return 0; + } +} + +/** + * @brief Stops audio playing and Power down the Audio Codec. + * @param Option: could be one of the following parameters + * - CODEC_PDWN_SW: for software power off (by writing registers). + * Then no need to reconfigure the Codec after power on. + * - CODEC_PDWN_HW: completely shut down the codec (physically). + * Then need to reconfigure the Codec after power on. + * @retval 0 if correct communication, else wrong communication + */ +uint32_t EVAL_AUDIO_Stop(uint32_t Option) +{ + /* Call Audio Codec Stop function */ + if (Codec_Stop(Option) != 0) + { + return 1; + } + else + { + /* Call Media layer Stop function */ + Audio_MAL_Stop(); + + /* Update the remaining data number */ + AudioRemSize = AudioTotalSize; + + /* Return 0 when all operations are correctly done */ + return 0; + } +} + +/** + * @brief Controls the current audio volume level. + * @param Volume: Volume level to be set in percentage from 0% to 100% (0 for + * Mute and 100 for Max volume level). + * @retval 0 if correct communication, else wrong communication + */ +uint32_t EVAL_AUDIO_VolumeCtl(uint8_t Volume) +{ + /* Call the codec volume control function with converted volume value */ + return (Codec_VolumeCtrl(VOLUME_CONVERT(Volume))); +} + +/** + * @brief Enables or disables the MUTE mode by software + * @param Command: could be AUDIO_MUTE_ON to mute sound or AUDIO_MUTE_OFF to + * unmute the codec and restore previous volume level. + * @retval 0 if correct communication, else wrong communication + */ +uint32_t EVAL_AUDIO_Mute(uint32_t Cmd) +{ + /* Call the Codec Mute function */ + return (Codec_Mute(Cmd)); +} + +/** + * @brief This function handles main Media layer interrupt. + * @param None + * @retval 0 if correct communication, else wrong communication + */ +static void Audio_MAL_IRQHandler(void) +{ +#ifndef AUDIO_MAL_MODE_NORMAL + uint16_t *pAddr = (uint16_t *)CurrentPos; + uint32_t Size = AudioRemSize; +#endif /* AUDIO_MAL_MODE_NORMAL */ + +#ifdef AUDIO_MAL_DMA_IT_TC_EN + /* Transfer complete interrupt */ + if (DMA_GetFlagStatus(AUDIO_MAL_DMA_FLAG_TC) != RESET) + { +#ifdef AUDIO_MAL_MODE_NORMAL + /* Check if the end of file has been reached */ + if (AudioRemSize > 0) + { + /* Clear the Interrupt flag */ + DMA_ClearFlag( AUDIO_MAL_DMA_FLAG_TC); + + /* Re-Configure the buffer address and size */ + DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) CurrentPos; + DMA_InitStructure.DMA_BufferSize = (uint32_t) (DMA_MAX(AudioRemSize)); + + /* Configure the DMA Channel with the new parameters */ + DMA_Init(AUDIO_MAL_DMA_CHANNEL, &DMA_InitStructure); + + /* Enable the I2S DMA Channel*/ + DMA_Cmd(AUDIO_MAL_DMA_CHANNEL, ENABLE); + + /* Update the current pointer position */ + CurrentPos += DMA_MAX(AudioRemSize); + + /* Update the remaining number of data to be played */ + AudioRemSize -= DMA_MAX(AudioRemSize); + } + else + { + /* Disable the I2S DMA Channel*/ + DMA_Cmd(AUDIO_MAL_DMA_CHANNEL, DISABLE); + + /* Clear the Interrupt flag */ + DMA_ClearFlag(AUDIO_MAL_DMA_FLAG_TC); + + /* Manage the remaining file size and new address offset: This function + should be coded by user (its prototype is already declared in stm32l152d_eval_audio_codec.h) */ + EVAL_AUDIO_TransferComplete_CallBack((uint32_t)CurrentPos, 0); + } + +#elif defined(AUDIO_MAL_MODE_CIRCULAR) + /* Manage the remaining file size and new address offset: This function + should be coded by user (its prototype is already declared in stm32l152d_eval_audio_codec.h) */ + EVAL_AUDIO_TransferComplete_CallBack(*pAddr, Size); + + /* Clear the Interrupt flag */ + DMA_ClearFlag(AUDIO_MAL_DMA_FLAG_TC); +#endif /* AUDIO_MAL_MODE_NORMAL */ + } +#endif /* AUDIO_MAL_DMA_IT_TC_EN */ + +#ifdef AUDIO_MAL_DMA_IT_HT_EN + /* Half Transfer complete interrupt */ + if (DMA_GetFlagStatus(AUDIO_MAL_DMA_FLAG_HT) != RESET) + { + /* Manage the remaining file size and new address offset: This function + should be coded by user (its prototype is already declared in stm32l152d_eval_audio_codec.h) */ + EVAL_AUDIO_HalfTransfer_CallBack((uint32_t)pAddr, Size); + + /* Clear the Interrupt flag */ + DMA_ClearFlag(AUDIO_MAL_DMA_FLAG_HT); + } +#endif /* AUDIO_MAL_DMA_IT_HT_EN */ + +#ifdef AUDIO_MAL_DMA_IT_TE_EN + /* FIFO Error interrupt */ + if ((DMA_GetFlagStatus(AUDIO_MAL_DMA_FLAG_TE) != RESET)) + + { + /* Manage the error generated on DMA FIFO: This function + should be coded by user (its prototype is already declared in stm32l152d_eval_audio_codec.h) */ + EVAL_AUDIO_Error_CallBack((uint32_t*)&pAddr); + + /* Clear the Interrupt flag */ + DMA_ClearFlag(AUDIO_MAL_DMA_FLAG_TE); + } +#endif /* AUDIO_MAL_DMA_IT_TE_EN */ +} + +/** + * @brief This function handles main I2S interrupt. + * @param None + * @retval 0 if correct communication, else wrong communication + */ +void Audio_MAL_I2S_IRQHandler(void) +{ + Audio_MAL_IRQHandler(); +} + +/** + * @brief I2S interrupt management + * @param None + * @retval None + */ +void Audio_I2S_IRQHandler(void) +{ + EVAL_Audio_I2S_IRQHandler(); +} + +/*============================================================================== + CS43L22 Audio Codec Control Functions +==============================================================================*/ +/** + * @brief Initializes the audio codec and all related interfaces (control + * interface: I2C and audio interface: I2S) + * @param OutputDevice: can be OUTPUT_DEVICE_SPEAKER, OUTPUT_DEVICE_HEADPHONE, + * OUTPUT_DEVICE_BOTH or OUTPUT_DEVICE_AUTO . + * @param Volume: Initial volume level (from 0 (Mute) to 100 (Max)) + * @param AudioFreq: Audio frequency used to play the audio stream. + * @retval 0 if correct communication, else wrong communication + */ +static uint32_t Codec_Init(uint16_t OutputDevice, uint8_t Volume, uint32_t AudioFreq) +{ + uint32_t counter = 0; + + /* Configure the Codec related IOs */ + Codec_GPIO_Init(); + + /* Reset the Codec Registers */ + Codec_Reset(); + + /* Initialize the Control interface of the Audio Codec */ + Codec_CtrlInterface_Init(); + + /* Keep Codec powered OFF */ + counter += Codec_WriteRegister(0x02, 0x01); + + switch (OutputDevice) + { + case OUTPUT_DEVICE_SPEAKER: + counter += Codec_WriteRegister(0x04, 0xFA); /* SPK always ON & HP always OFF */ + OutputDev = 0xFA; + break; + + case OUTPUT_DEVICE_HEADPHONE: + counter += Codec_WriteRegister(0x04, 0xAF); /* SPK always OFF & HP always ON */ + OutputDev = 0xAF; + break; + + case OUTPUT_DEVICE_BOTH: + counter += Codec_WriteRegister(0x04, 0xAA); /* SPK always ON & HP always ON */ + OutputDev = 0xAA; + break; + + case OUTPUT_DEVICE_AUTO: + counter += Codec_WriteRegister(0x04, 0x05); /* Detect the HP or the SPK automatically */ + OutputDev = 0x05; + break; + + default: + counter += Codec_WriteRegister(0x04, 0x05); /* Detect the HP or the SPK automatically */ + OutputDev = 0x05; + break; + } + + /* Clock configuration: Auto detection */ + counter += Codec_WriteRegister(0x05, 0x81); + + /* Set the Slave Mode and the audio Standard */ + counter += Codec_WriteRegister(0x06, CODEC_STANDARD); + + /* Set the Master volume */ + Codec_VolumeCtrl(Volume); + + /* If the Speaker is enabled, set the Mono mode and volume attenuation level */ + if (OutputDevice != OUTPUT_DEVICE_HEADPHONE) + { + /* Set the Speaker Mono mode */ + counter += Codec_WriteRegister(0x0F , 0x06); + + /* Set the Speaker attenuation level */ + counter += Codec_WriteRegister(0x24, 0xF0); + counter += Codec_WriteRegister(0x25, 0xF0); + } + + /* Power on the Codec */ + counter += Codec_WriteRegister(0x02, 0x9E); + + /* Configure the I2S peripheral */ + Codec_AudioInterface_Init(AudioFreq); + + /* Return communication control value */ + return counter; +} + +/** + * @brief Restore the audio codec state to default state and free all used + * resources. + * @param None + * @retval 0 if correct communication, else wrong communication + */ +static uint32_t Codec_DeInit(void) +{ + uint32_t counter = 0; + + /* Reset the Codec Registers */ + Codec_Reset(); + + /* Keep Codec powered OFF */ + counter += Codec_WriteRegister(0x02, 0x01); + + /* Deinitialize all use GPIOs */ + Codec_GPIO_DeInit(); + + /* Disable the Codec control interface */ + Codec_CtrlInterface_DeInit(); + + /* Deinitialize the Codec audio interface (I2S) */ + Codec_AudioInterface_DeInit(); + + /* Return communication control value */ + return counter; +} + +/** + * @brief Start the audio Codec play feature. + * @note For this codec no Play options are required. + * @param None + * @retval 0 if correct communication, else wrong communication + */ +static uint32_t Codec_Play(void) +{ + /* + No actions required on Codec level for play command + */ + + /* Return communication control value */ + return 0; +} + +/** + * @brief Pauses and resumes playing on the audio codec. + * @param Cmd: AUDIO_PAUSE (or 0) to pause, AUDIO_RESUME (or any value different + * from 0) to resume. + * @retval 0 if correct communication, else wrong communication + */ +static uint32_t Codec_PauseResume(uint32_t Cmd) +{ + uint32_t counter = 0; + + /* Pause the audio file playing */ + if (Cmd == AUDIO_PAUSE) + { + /* Mute the output first */ + counter += Codec_Mute(AUDIO_MUTE_ON); + + /* Put the Codec in Power save mode */ + counter += Codec_WriteRegister(0x02, 0x01); + } + else /* AUDIO_RESUME */ + { + /* Unmute the output first */ + counter += Codec_Mute(AUDIO_MUTE_OFF); + + counter += Codec_WriteRegister(0x04, OutputDev); + + /* Exit the Power save mode */ + counter += Codec_WriteRegister(0x02, 0x9E); + } + + return counter; +} + +/** + * @brief Stops audio Codec playing. It powers down the codec. + * @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 + */ +static uint32_t Codec_Stop(uint32_t CodecPdwnMode) +{ + uint32_t counter = 0; + + /* Mute the output first */ + Codec_Mute(AUDIO_MUTE_ON); + + if (CodecPdwnMode == CODEC_PDWN_SW) + { + /* Power down the speaker (PMSPK bits)*/ + counter += Codec_WriteRegister(0x02, 0x9F); + } + else /* CODEC_PDWN_HW */ + { + /* Power down the components */ + counter += Codec_WriteRegister(0x02, 0x9F); + + /* Wait at least 100us */ + Delay(0xFFF); + + /* Reset The pin */ + GPIO_WriteBit(AUDIO_RESET_GPIO, AUDIO_RESET_PIN, Bit_RESET); + } + + return counter; +} + +/** + * @brief Sets higher or lower the codec volume level. + * @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 + */ +static uint32_t Codec_VolumeCtrl(uint8_t Volume) +{ + uint32_t counter = 0; + + if (Volume > 0xE6) + { + /* Set the Master volume */ + counter += Codec_WriteRegister(0x20, Volume - 0xE7); + counter += Codec_WriteRegister(0x21, Volume - 0xE7); + } + else + { + /* Set the Master volume */ + counter += Codec_WriteRegister(0x20, Volume + 0x19); + counter += Codec_WriteRegister(0x21, Volume + 0x19); + } + + return counter; +} + +/** + * @brief Enables or disables the mute feature on the audio codec. + * @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 + */ +static uint32_t Codec_Mute(uint32_t Cmd) +{ + uint32_t counter = 0; + + /* Set the Mute mode */ + if (Cmd == AUDIO_MUTE_ON) + { + counter += Codec_WriteRegister(0x04, 0xFF); + } + else /* AUDIO_MUTE_OFF Disable the Mute */ + { + counter += Codec_WriteRegister(0x04, OutputDev); + } + + return counter; +} + +/** + * @brief Resets the audio codec. It restores the default configuration of the + * codec (this function shall be called before initializing the codec). + * @note This function calls an external driver function: The IO Expander driver. + * @param None + * @retval None + */ +static void Codec_Reset(void) +{ + /* Power Down the codec */ + GPIO_WriteBit(AUDIO_RESET_GPIO, AUDIO_RESET_PIN, Bit_RESET); + + /* wait for a delay to insure registers erasing */ + Delay(CODEC_RESET_DELAY); + + /* Power on the codec */ + GPIO_WriteBit(AUDIO_RESET_GPIO, AUDIO_RESET_PIN, Bit_SET); +} + +/** + * @brief Writes a Byte to a given register into the audio codec through the + * control interface (I2C) + * @param RegisterAddr: The address (location) of the register to be written. + * @param RegisterValue: the Byte value to be written into destination register. + * @retval 0 if correct communication, else wrong communication + */ +static uint32_t Codec_WriteRegister(uint8_t RegisterAddr, uint8_t RegisterValue) +{ + uint32_t result = 0; + + /*!< While the bus is busy */ + CODECTimeout = CODEC_LONG_TIMEOUT; + while(I2C_GetFlagStatus(CODEC_I2C, I2C_FLAG_BUSY)) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /* Start the config sequence */ + I2C_GenerateSTART(CODEC_I2C, ENABLE); + + /* Test on EV5 and clear it */ + CODECTimeout = CODEC_FLAG_TIMEOUT; + while (!I2C_CheckEvent(CODEC_I2C, I2C_EVENT_MASTER_MODE_SELECT)) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /* Transmit the slave address and enable writing operation */ + I2C_Send7bitAddress(CODEC_I2C, CODEC_ADDRESS, I2C_Direction_Transmitter); + + /* Test on EV6 and clear it */ + CODECTimeout = CODEC_FLAG_TIMEOUT; + while (!I2C_CheckEvent(CODEC_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /* Transmit the first address for write operation */ + I2C_SendData(CODEC_I2C, RegisterAddr); + + /* Test on EV8 and clear it */ + CODECTimeout = CODEC_FLAG_TIMEOUT; + while (!I2C_CheckEvent(CODEC_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTING)) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /* Prepare the register value to be sent */ + I2C_SendData(CODEC_I2C, RegisterValue); + + /*!< Wait till all data have been physically transferred on the bus */ + CODECTimeout = CODEC_LONG_TIMEOUT; + while(!I2C_GetFlagStatus(CODEC_I2C, I2C_FLAG_BTF)) + { + if((CODECTimeout--) == 0) Codec_TIMEOUT_UserCallback(); + } + + /* End the configuration sequence */ + I2C_GenerateSTOP(CODEC_I2C, ENABLE); + +#ifdef VERIFY_WRITTENDATA + /* Verify that the data has been correctly written */ + result = (Codec_ReadRegister(RegisterAddr) == RegisterValue)? 0:1; +#endif /* VERIFY_WRITTENDATA */ + + /* Return the verifying value: 0 (Passed) or 1 (Failed) */ + return result; +} + +/** + * @brief Reads and returns the value of an audio codec register through the + * control interface (I2C). + * @param RegisterAddr: Address of the register to be read. + * @retval Value of the register to be read or dummy value if the communication + * fails. + */ +static uint32_t Codec_ReadRegister(uint8_t RegisterAddr) +{ + uint32_t result = 0; + + /*!< While the bus is busy */ + CODECTimeout = CODEC_LONG_TIMEOUT; + while(I2C_GetFlagStatus(CODEC_I2C, I2C_FLAG_BUSY)) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /* Start the config sequence */ + I2C_GenerateSTART(CODEC_I2C, ENABLE); + + /* Test on EV5 and clear it */ + CODECTimeout = CODEC_FLAG_TIMEOUT; + while (!I2C_CheckEvent(CODEC_I2C, I2C_EVENT_MASTER_MODE_SELECT)) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /* Transmit the slave address and enable writing operation */ + I2C_Send7bitAddress(CODEC_I2C, CODEC_ADDRESS, I2C_Direction_Transmitter); + + /* Test on EV6 and clear it */ + CODECTimeout = CODEC_FLAG_TIMEOUT; + while (!I2C_CheckEvent(CODEC_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /* Transmit the register address to be read */ + I2C_SendData(CODEC_I2C, RegisterAddr); + + /* Test on EV8 and clear it */ + CODECTimeout = CODEC_FLAG_TIMEOUT; + while (I2C_GetFlagStatus(CODEC_I2C, I2C_FLAG_BTF) == RESET) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /*!< Send START condition a second time */ + I2C_GenerateSTART(CODEC_I2C, ENABLE); + + /*!< Test on EV5 and clear it (cleared by reading SR1 then writing to DR) */ + CODECTimeout = CODEC_FLAG_TIMEOUT; + while(!I2C_CheckEvent(CODEC_I2C, I2C_EVENT_MASTER_MODE_SELECT)) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /*!< Send Codec address for read */ + I2C_Send7bitAddress(CODEC_I2C, CODEC_ADDRESS, I2C_Direction_Receiver); + + /* Wait on ADDR flag to be set (ADDR is still not cleared at this level */ + CODECTimeout = CODEC_FLAG_TIMEOUT; + while(I2C_GetFlagStatus(CODEC_I2C, I2C_FLAG_ADDR) == RESET) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /*!< Disable Acknowledgment */ + I2C_AcknowledgeConfig(CODEC_I2C, DISABLE); + + /* Clear ADDR register by reading SR1 then SR2 register (SR1 has already been read) */ + (void)CODEC_I2C->SR2; + + /*!< Send STOP Condition */ + I2C_GenerateSTOP(CODEC_I2C, ENABLE); + + /* Wait for the byte to be received */ + CODECTimeout = CODEC_FLAG_TIMEOUT; + while(I2C_GetFlagStatus(CODEC_I2C, I2C_FLAG_RXNE) == RESET) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /*!< Read the byte received from the Codec */ + result = I2C_ReceiveData(CODEC_I2C); + + /* Wait to make sure that STOP flag has been cleared */ + CODECTimeout = CODEC_FLAG_TIMEOUT; + while(CODEC_I2C->CR1 & I2C_CR1_STOP) + { + if((CODECTimeout--) == 0) return Codec_TIMEOUT_UserCallback(); + } + + /*!< Re-Enable Acknowledgment to be ready for another reception */ + I2C_AcknowledgeConfig(CODEC_I2C, ENABLE); + + /* Clear AF flag for next communication */ + I2C_ClearFlag(CODEC_I2C, I2C_FLAG_AF); + + /* Return the byte read from Codec */ + return result; +} + +/** + * @brief Initializes the Audio Codec control interface (I2C). + * @param None + * @retval None + */ +static void Codec_CtrlInterface_Init(void) +{ + I2C_InitTypeDef I2C_InitStructure; + + /* Enable the CODEC_I2C peripheral clock */ + RCC_APB1PeriphClockCmd(CODEC_I2C_CLK, ENABLE); + + /* CODEC_I2C peripheral configuration */ + I2C_DeInit(CODEC_I2C); + I2C_InitStructure.I2C_Mode = I2C_Mode_I2C; + I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; + I2C_InitStructure.I2C_OwnAddress1 = 0x33; + I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; + I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; + I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED; + /* Enable the I2C peripheral */ + I2C_Cmd(CODEC_I2C, ENABLE); + I2C_Init(CODEC_I2C, &I2C_InitStructure); +} + +/** + * @brief Restore the Audio Codec control interface to its default state. + * This function doesn't de-initialize the I2C because the I2C peripheral + * may be used by other modules. + * @param None + * @retval None + */ +static void Codec_CtrlInterface_DeInit(void) +{ + /* Disable the I2C peripheral */ /* This step is not done here because + the I2C interface can be used by other modules */ + I2C_DeInit(CODEC_I2C); +} + +/** + * @brief Initializes the Audio Codec audio interface (I2S) + * @note This function assumes that the I2S input clock (through PLL_R in + * Devices RevA/Z and through dedicated PLLI2S_R in Devices RevB/Y) + * is already configured and ready to be used. + * @param AudioFreq: Audio frequency to be configured for the I2S peripheral. + * @retval None + */ +static void Codec_AudioInterface_Init(uint32_t AudioFreq) +{ + I2S_InitTypeDef I2S_InitStructure; + + /* Enable the CODEC_I2S peripheral clock */ + RCC_APB1PeriphClockCmd(CODEC_I2S_CLK, ENABLE); + + /* CODEC_I2S peripheral configuration */ + SPI_I2S_DeInit(CODEC_I2S); + I2S_InitStructure.I2S_AudioFreq = AudioFreq; + I2S_InitStructure.I2S_Standard = I2S_STANDARD; + I2S_InitStructure.I2S_DataFormat = I2S_DataFormat_16b; + I2S_InitStructure.I2S_CPOL = I2S_CPOL_Low; + + I2S_InitStructure.I2S_Mode = I2S_Mode_MasterTx; + +#ifdef CODEC_MCLK_ENABLED + I2S_InitStructure.I2S_MCLKOutput = I2S_MCLKOutput_Enable; +#elif defined(CODEC_MCLK_DISABLED) + I2S_InitStructure.I2S_MCLKOutput = I2S_MCLKOutput_Disable; +#else +#error "No selection for the MCLK output has been defined !" +#endif /* CODEC_MCLK_ENABLED */ + + /* Initialize the I2S peripheral with the structure above */ + I2S_Init(CODEC_I2S, &I2S_InitStructure); + /* The I2S peripheral will be enabled only in the EVAL_AUDIO_Play() function + or by user functions if DMA mode not enabled */ +} + +/** + * @brief Restores the Audio Codec audio interface to its default state. + * @param None + * @retval None + */ +static void Codec_AudioInterface_DeInit(void) +{ + /* Disable the CODEC_I2S peripheral (in case it hasn't already been disabled) */ + I2S_Cmd(CODEC_I2S, DISABLE); + + /* Deinitialize the CODEC_I2S peripheral */ + SPI_I2S_DeInit(CODEC_I2S); + + /* Disable the CODEC_I2S peripheral clock */ + RCC_APB1PeriphClockCmd(CODEC_I2S_CLK, DISABLE); +} + +/** + * @brief Initializes IOs used by the Audio Codec (on the control and audio + * interfaces). + * @param None + * @retval None + */ +static void Codec_GPIO_Init(void) +{ + GPIO_InitTypeDef GPIO_InitStructure; + + /* Enable Reset GPIO Clock */ + RCC_AHBPeriphClockCmd(AUDIO_RESET_GPIO_CLK,ENABLE); + +/* Audio reset pin configuration ---------------------------------------------*/ + GPIO_InitStructure.GPIO_Pin = AUDIO_RESET_PIN; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; + GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; + GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; + GPIO_Init(AUDIO_RESET_GPIO, &GPIO_InitStructure); + + /* Enable I2S and I2C GPIO clocks */ + RCC_AHBPeriphClockCmd(CODEC_I2C_GPIO_CLOCK | CODEC_I2S_GPIO_CLOCK, ENABLE); + +/* CODEC_I2C SCL and SDA pins configuration ----------------------------------*/ + GPIO_InitStructure.GPIO_Pin = CODEC_I2C_SCL_PIN | CODEC_I2C_SDA_PIN; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; + GPIO_InitStructure.GPIO_OType = GPIO_OType_OD; + GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; + GPIO_Init(CODEC_I2C_GPIO, &GPIO_InitStructure); + /* Connect pins to I2C peripheral */ + GPIO_PinAFConfig(CODEC_I2C_GPIO, CODEC_I2S_SCL_PINSRC, CODEC_I2C_GPIO_AF); + GPIO_PinAFConfig(CODEC_I2C_GPIO, CODEC_I2S_SDA_PINSRC, CODEC_I2C_GPIO_AF); + +/* CODEC_I2S pins configuration: WS, SCK and SD pins -------------------------*/ + GPIO_InitStructure.GPIO_Pin = CODEC_I2S_SCK_PIN | + CODEC_I2S_SD_PIN | + CODEC_I2S_WS_PIN; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; + GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; + GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; + GPIO_Init(CODEC_I2S_GPIO, &GPIO_InitStructure); + + /* Connect pins to I2S peripheral */ + GPIO_PinAFConfig(CODEC_I2S_GPIO, CODEC_I2S_WS_PINSRC, CODEC_I2S_GPIO_AF); + GPIO_PinAFConfig(CODEC_I2S_GPIO, CODEC_I2S_SCK_PINSRC, CODEC_I2S_GPIO_AF); + GPIO_PinAFConfig(CODEC_I2S_GPIO, CODEC_I2S_SD_PINSRC, CODEC_I2S_GPIO_AF); + +#ifdef CODEC_MCLK_ENABLED + /* CODEC_I2S pins configuration: MCK pin */ + GPIO_InitStructure.GPIO_Pin = CODEC_I2S_MCK_PIN; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; + GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; + GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; + GPIO_Init(CODEC_I2S_MCK_GPIO, &GPIO_InitStructure); + /* Connect pins to I2S peripheral */ + GPIO_PinAFConfig(CODEC_I2S_MCK_GPIO, CODEC_I2S_MCK_PINSRC, CODEC_I2S_GPIO_AF); +#endif /* CODEC_MCLK_ENABLED */ +} + +/** + * @brief Restores the IOs used by the Audio Codec interface to their default state. + * @param None + * @retval None + */ +static void Codec_GPIO_DeInit(void) +{ + GPIO_InitTypeDef GPIO_InitStructure; + + /* Deinitialize all the GPIOs used by the driver */ + GPIO_InitStructure.GPIO_Pin = CODEC_I2S_SCK_PIN | CODEC_I2S_SD_PIN; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; + GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; + GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; + GPIO_Init(CODEC_I2S_GPIO, &GPIO_InitStructure); + + GPIO_InitStructure.GPIO_Pin = CODEC_I2S_WS_PIN; + GPIO_Init(CODEC_I2S_GPIO, &GPIO_InitStructure); + + /* Disconnect pins from I2S peripheral */ + GPIO_PinAFConfig(CODEC_I2S_GPIO, CODEC_I2S_WS_PINSRC, 0x00); + GPIO_PinAFConfig(CODEC_I2S_GPIO, CODEC_I2S_SCK_PINSRC, 0x00); + GPIO_PinAFConfig(CODEC_I2S_GPIO, CODEC_I2S_SD_PINSRC, 0x00); + +#ifdef CODEC_MCLK_ENABLED + /* CODEC_I2S pins deinitialization: MCK pin */ + GPIO_InitStructure.GPIO_Pin = CODEC_I2S_MCK_PIN; + GPIO_Init(CODEC_I2S_MCK_GPIO, &GPIO_InitStructure); + /* Disconnect pins from I2S peripheral */ + GPIO_PinAFConfig(CODEC_I2S_MCK_GPIO, CODEC_I2S_MCK_PINSRC, CODEC_I2S_GPIO_AF); +#endif /* CODEC_MCLK_ENABLED */ +} + +/** + * @brief Inserts a delay time (not accurate timing). + * @param nCount: specifies the delay time length. + * @retval None + */ +static void Delay( __IO uint32_t nCount) +{ + for (; nCount != 0; nCount--); +} + +#ifdef USE_DEFAULT_TIMEOUT_CALLBACK +/** + * @brief Basic management of the timeout situation. + * @param None + * @retval None + */ +uint32_t Codec_TIMEOUT_UserCallback(void) +{ + /* Block communication and all processes */ + while (1) + { + } +} +#endif /* USE_DEFAULT_TIMEOUT_CALLBACK */ + +/*============================================================================== + Audio MAL Interface Control Functions +==============================================================================*/ + +/** + * @brief Initializes and prepares the Media to perform audio data transfer + * from Media to the I2S peripheral. + * @param None + * @retval None + */ +static void Audio_MAL_Init(void) +{ + +#ifdef I2S_INTERRUPT + NVIC_InitTypeDef NVIC_InitStructure; + + NVIC_InitStructure.NVIC_IRQChannel = CODEC_I2S_IRQ; + NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; + NVIC_InitStructure.NVIC_IRQChannelSubPriority =0; + NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; + NVIC_Init(&NVIC_InitStructure); + + SPI_I2S_ITConfig(CODEC_I2S, SPI_I2S_IT_TXE, ENABLE); + +#else +#if defined(AUDIO_MAL_DMA_IT_TC_EN) || defined(AUDIO_MAL_DMA_IT_HT_EN) || defined(AUDIO_MAL_DMA_IT_TE_EN) + NVIC_InitTypeDef NVIC_InitStructure; +#endif + + if (CurrAudioInterface == AUDIO_INTERFACE_I2S) + { + /* Enable the DMA clock */ + RCC_AHBPeriphClockCmd(AUDIO_I2S_DMA_CLOCK, ENABLE); + + /* Configure the DMA Channel */ + DMA_Cmd(AUDIO_MAL_DMA_CHANNEL, DISABLE); + DMA_DeInit(AUDIO_MAL_DMA_CHANNEL); + /* Set the parameters to be configured */ + DMA_InitStructure.DMA_PeripheralBaseAddr = AUDIO_MAL_DMA_DREG; + DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)0; /* This field will be configured in play function */ + DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; + DMA_InitStructure.DMA_BufferSize = (uint32_t)0xFFFE; /* This field will be configured in play function */ + DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; + DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; + DMA_InitStructure.DMA_PeripheralDataSize = AUDIO_MAL_DMA_PERIPH_DATA_SIZE; + DMA_InitStructure.DMA_MemoryDataSize = AUDIO_MAL_DMA_MEM_DATA_SIZE; +#ifdef AUDIO_MAL_MODE_NORMAL + DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; +#elif defined(AUDIO_MAL_MODE_CIRCULAR) + DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; +#else +#error "AUDIO_MAL_MODE_NORMAL or AUDIO_MAL_MODE_CIRCULAR should be selected !!" +#endif /* AUDIO_MAL_MODE_NORMAL */ + DMA_InitStructure.DMA_Priority = DMA_Priority_High; + DMA_Init(AUDIO_MAL_DMA_CHANNEL, &DMA_InitStructure); + + /* Enable the selected DMA interrupts (selected in "stm32l152d_eval_eval_audio_codec.h" defines) */ +#ifdef AUDIO_MAL_DMA_IT_TC_EN + DMA_ITConfig(AUDIO_MAL_DMA_CHANNEL, DMA_IT_TC, ENABLE); +#endif /* AUDIO_MAL_DMA_IT_TC_EN */ +#ifdef AUDIO_MAL_DMA_IT_HT_EN + DMA_ITConfig(AUDIO_MAL_DMA_CHANNEL, DMA_IT_HT, ENABLE); +#endif /* AUDIO_MAL_DMA_IT_HT_EN */ +#ifdef AUDIO_MAL_DMA_IT_TE_EN + DMA_ITConfig(AUDIO_MAL_DMA_CHANNEl, DMA_IT_TE | DMA_IT_FE | DMA_IT_DME, ENABLE); +#endif /* AUDIO_MAL_DMA_IT_TE_EN */ + +#if defined(AUDIO_MAL_DMA_IT_TC_EN) || defined(AUDIO_MAL_DMA_IT_HT_EN) || defined(AUDIO_MAL_DMA_IT_TE_EN) + /* I2S DMA IRQ Channel configuration */ + NVIC_InitStructure.NVIC_IRQChannel = AUDIO_MAL_DMA_IRQ; + NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = EVAL_AUDIO_IRQ_PREPRIO; + NVIC_InitStructure.NVIC_IRQChannelSubPriority = EVAL_AUDIO_IRQ_SUBRIO; + NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; + NVIC_Init(&NVIC_InitStructure); +#endif + } + + if (CurrAudioInterface == AUDIO_INTERFACE_I2S) + { + /* Enable the I2S DMA request */ + SPI_I2S_DMACmd(CODEC_I2S, SPI_I2S_DMAReq_Tx, ENABLE); + } +#endif +} + +/** + * @brief Restore default state of the used Media. + * @param None + * @retval None + */ +static void Audio_MAL_DeInit(void) +{ +#if defined(AUDIO_MAL_DMA_IT_TC_EN) || defined(AUDIO_MAL_DMA_IT_HT_EN) || defined(AUDIO_MAL_DMA_IT_TE_EN) + NVIC_InitTypeDef NVIC_InitStructure; + + /* Deinitialize the NVIC interrupt for the I2S DMA Channel */ + NVIC_InitStructure.NVIC_IRQChannel = AUDIO_MAL_DMA_IRQ; + NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = EVAL_AUDIO_IRQ_PREPRIO; + NVIC_InitStructure.NVIC_IRQChannelSubPriority = EVAL_AUDIO_IRQ_SUBRIO; + NVIC_InitStructure.NVIC_IRQChannelCmd = DISABLE; + NVIC_Init(&NVIC_InitStructure); +#endif + + /* Disable the DMA channel before the deinit */ + DMA_Cmd(AUDIO_MAL_DMA_CHANNEL, DISABLE); + + /* Dinitialize the DMA Channel */ + DMA_DeInit(AUDIO_MAL_DMA_CHANNEL); + + /* + The DMA clock is not disabled, since it can be used by other channels + */ +} + +/** + * @brief Starts playing audio stream from the audio Media. + * @param None + * @retval None + */ +static void Audio_MAL_Play(uint32_t Addr, uint32_t Size) +{ +#ifndef I2S_INTERRUPT + if (CurrAudioInterface == AUDIO_INTERFACE_I2S) + { + /* Configure the buffer address and size */ + DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Addr; + DMA_InitStructure.DMA_BufferSize = (uint32_t)Size; + + /* Configure the DMA Channel with the new parameters */ + DMA_Init(AUDIO_MAL_DMA_CHANNEL, &DMA_InitStructure); + + /* Enable the I2S DMA Channel*/ + DMA_Cmd(AUDIO_MAL_DMA_CHANNEL, ENABLE); + } +#else + /* If the I2S peripheral is still not enabled, enable it */ + if ((CODEC_I2S->I2SCFGR & I2S_ENABLE_MASK) == 0) + { + I2S_Cmd(CODEC_I2S, ENABLE); + } +#endif /* I2S_INTERRUPT */ +} + +/** + * @brief Switch dynamically (while audio file is played) the output target + * (speaker or headphone). + * @note This function modifies a global variable of the audio codec driver: OutputDev. + * @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 Codec_SwitchOutput(uint8_t Output) +{ + uint8_t counter = 0; + + switch (Output) + { + case OUTPUT_DEVICE_SPEAKER: + counter += Codec_WriteRegister(0x04, 0xFA); /* SPK always ON & HP always OFF */ + OutputDev = 0xFA; + break; + + case OUTPUT_DEVICE_HEADPHONE: + counter += Codec_WriteRegister(0x04, 0xAF); /* SPK always OFF & HP always ON */ + OutputDev = 0xAF; + break; + + case OUTPUT_DEVICE_BOTH: + counter += Codec_WriteRegister(0x04, 0xAA); /* SPK always ON & HP always ON */ + OutputDev = 0xAA; + break; + + case OUTPUT_DEVICE_AUTO: + counter += Codec_WriteRegister(0x04, 0x05); /* Detect the HP or the SPK automatically */ + OutputDev = 0x05; + break; + + default: + counter += Codec_WriteRegister(0x04, 0x05); /* Detect the HP or the SPK automatically */ + OutputDev = 0x05; + break; + } + + return counter; +} + +/** + * @brief Pauses or Resumes the audio stream playing from the Media. + * @param Cmd: AUDIO_PAUSE (or 0) to pause, AUDIO_RESUME (or any value different + * from 0) to resume. + * @param Addr: Address from/at which the audio stream should resume/pause. + * @retval None + */ +static void Audio_MAL_PauseResume(uint32_t Cmd, uint32_t Addr) +{ + /* Pause the audio file playing */ + if (Cmd == AUDIO_PAUSE) + { + /* Disable the I2S DMA request */ + SPI_I2S_DMACmd(CODEC_I2S, SPI_I2S_DMAReq_Tx, DISABLE); + + /* Pause the I2S DMA Channel + Note. For the STM32L1xx devices, the DMA implements a pause feature, + by disabling the Channel, all configuration is preserved and data + transfer is paused till the next enable of the Channel. + This feature is not available on STM32L1xx devices. */ + DMA_Cmd(AUDIO_MAL_DMA_CHANNEL, DISABLE); + } + else /* AUDIO_RESUME */ + { + /* Enable the I2S DMA request */ + SPI_I2S_DMACmd(CODEC_I2S, SPI_I2S_DMAReq_Tx, ENABLE); + + /* Resume the I2S DMA Channel + Note. For the STM32L1xx devices, the DMA implements a pause feature, + by disabling the channel, all configuration is preserved and data + transfer is paused till the next enable of the channel. + This feature is not available on STM32L1xx devices. */ + DMA_Cmd(AUDIO_MAL_DMA_CHANNEL, ENABLE); + + /* If the I2S peripheral is still not enabled, enable it */ + if ((CODEC_I2S->I2SCFGR & I2S_ENABLE_MASK) == 0) + { + I2S_Cmd(CODEC_I2S, ENABLE); + } + } +} + +/** + * @brief Stops audio stream playing on the used Media. + * @param None + * @retval None + */ +static void Audio_MAL_Stop(void) +{ + /* Stop the Transfer on the I2S side: Stop and disable the DMA channel */ + DMA_Cmd(AUDIO_MAL_DMA_CHANNEL, DISABLE); + + /* Clear all the DMA flags for the next transfer */ + DMA_ClearFlag(AUDIO_MAL_DMA_FLAG_TC |AUDIO_MAL_DMA_FLAG_HT | AUDIO_MAL_DMA_FLAG_TE); + + /* + The I2S DMA requests are not disabled here. + */ + /* In all modes, disable the I2S peripheral */ + I2S_Cmd(CODEC_I2S, DISABLE); +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |