diff options
Diffstat (limited to 'stmhal/usbdev/class/AUDIO/Src/usbd_audio.c')
| -rw-r--r-- | stmhal/usbdev/class/AUDIO/Src/usbd_audio.c | 781 |
1 files changed, 0 insertions, 781 deletions
diff --git a/stmhal/usbdev/class/AUDIO/Src/usbd_audio.c b/stmhal/usbdev/class/AUDIO/Src/usbd_audio.c deleted file mode 100644 index 32565320a..000000000 --- a/stmhal/usbdev/class/AUDIO/Src/usbd_audio.c +++ /dev/null @@ -1,781 +0,0 @@ -/**
- ******************************************************************************
- * @file usbd_audio.c
- * @author MCD Application Team
- * @version V2.0.0
- * @date 18-February-2014
- * @brief This file provides the HID core functions.
- *
- * @verbatim
- *
- * ===================================================================
- * AUDIO Class Description
- * ===================================================================
- *
- *
- *
- *
- *
- *
- * @note In HS mode and when the DMA is used, all variables and data structures
- * dealing with the DMA during the transaction process should be 32-bit aligned.
- *
- *
- * @endverbatim
- *
- ******************************************************************************
- * @attention
- *
- * <h2><center>© COPYRIGHT 2014 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.
- *
- ******************************************************************************
- */
-
-/* Includes ------------------------------------------------------------------*/
-#include "usbd_audio.h"
-#include "usbd_desc.h"
-#include "usbd_ctlreq.h"
-
-
-/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
- * @{
- */
-
-
-/** @defgroup USBD_AUDIO
- * @brief usbd core module
- * @{
- */
-
-/** @defgroup USBD_AUDIO_Private_TypesDefinitions
- * @{
- */
-/**
- * @}
- */
-
-
-/** @defgroup USBD_AUDIO_Private_Defines
- * @{
- */
-
-/**
- * @}
- */
-
-
-/** @defgroup USBD_AUDIO_Private_Macros
- * @{
- */
-#define AUDIO_SAMPLE_FREQ(frq) (uint8_t)(frq), (uint8_t)((frq >> 8)), (uint8_t)((frq >> 16))
-
-#define AUDIO_PACKET_SZE(frq) (uint8_t)(((frq * 2 * 2)/1000) & 0xFF), \
- (uint8_t)((((frq * 2 * 2)/1000) >> 8) & 0xFF)
-
-/**
- * @}
- */
-
-
-
-
-/** @defgroup USBD_AUDIO_Private_FunctionPrototypes
- * @{
- */
-
-
-static uint8_t USBD_AUDIO_Init (USBD_HandleTypeDef *pdev,
- uint8_t cfgidx);
-
-static uint8_t USBD_AUDIO_DeInit (USBD_HandleTypeDef *pdev,
- uint8_t cfgidx);
-
-static uint8_t USBD_AUDIO_Setup (USBD_HandleTypeDef *pdev,
- USBD_SetupReqTypedef *req);
-
-static uint8_t *USBD_AUDIO_GetCfgDesc (uint16_t *length);
-
-static uint8_t *USBD_AUDIO_GetDeviceQualifierDesc (uint16_t *length);
-
-static uint8_t USBD_AUDIO_DataIn (USBD_HandleTypeDef *pdev, uint8_t epnum);
-
-static uint8_t USBD_AUDIO_DataOut (USBD_HandleTypeDef *pdev, uint8_t epnum);
-
-static uint8_t USBD_AUDIO_EP0_RxReady (USBD_HandleTypeDef *pdev);
-
-static uint8_t USBD_AUDIO_EP0_TxReady (USBD_HandleTypeDef *pdev);
-
-static uint8_t USBD_AUDIO_SOF (USBD_HandleTypeDef *pdev);
-
-static uint8_t USBD_AUDIO_IsoINIncomplete (USBD_HandleTypeDef *pdev, uint8_t epnum);
-
-static uint8_t USBD_AUDIO_IsoOutIncomplete (USBD_HandleTypeDef *pdev, uint8_t epnum);
-
-static void AUDIO_REQ_GetCurrent(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);
-
-static void AUDIO_REQ_SetCurrent(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);
-
-/**
- * @}
- */
-
-/** @defgroup USBD_AUDIO_Private_Variables
- * @{
- */
-
-USBD_ClassTypeDef USBD_AUDIO =
-{
- USBD_AUDIO_Init,
- USBD_AUDIO_DeInit,
- USBD_AUDIO_Setup,
- USBD_AUDIO_EP0_TxReady,
- USBD_AUDIO_EP0_RxReady,
- USBD_AUDIO_DataIn,
- USBD_AUDIO_DataOut,
- USBD_AUDIO_SOF,
- USBD_AUDIO_IsoINIncomplete,
- USBD_AUDIO_IsoOutIncomplete,
- USBD_AUDIO_GetCfgDesc,
- USBD_AUDIO_GetCfgDesc,
- USBD_AUDIO_GetCfgDesc,
- USBD_AUDIO_GetDeviceQualifierDesc,
-};
-
-/* USB AUDIO device Configuration Descriptor */
-__ALIGN_BEGIN static uint8_t USBD_AUDIO_CfgDesc[USB_AUDIO_CONFIG_DESC_SIZ] __ALIGN_END =
-{
- /* Configuration 1 */
- 0x09, /* bLength */
- USB_DESC_TYPE_CONFIGURATION, /* bDescriptorType */
- LOBYTE(USB_AUDIO_CONFIG_DESC_SIZ), /* wTotalLength 109 bytes*/
- HIBYTE(USB_AUDIO_CONFIG_DESC_SIZ),
- 0x02, /* bNumInterfaces */
- 0x01, /* bConfigurationValue */
- 0x00, /* iConfiguration */
- 0xC0, /* bmAttributes BUS Powred*/
- 0x32, /* bMaxPower = 100 mA*/
- /* 09 byte*/
-
- /* USB Speaker Standard interface descriptor */
- AUDIO_INTERFACE_DESC_SIZE, /* bLength */
- USB_DESC_TYPE_INTERFACE, /* bDescriptorType */
- 0x00, /* bInterfaceNumber */
- 0x00, /* bAlternateSetting */
- 0x00, /* bNumEndpoints */
- USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
- AUDIO_SUBCLASS_AUDIOCONTROL, /* bInterfaceSubClass */
- AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
- 0x00, /* iInterface */
- /* 09 byte*/
-
- /* USB Speaker Class-specific AC Interface Descriptor */
- AUDIO_INTERFACE_DESC_SIZE, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_CONTROL_HEADER, /* bDescriptorSubtype */
- 0x00, /* 1.00 */ /* bcdADC */
- 0x01,
- 0x27, /* wTotalLength = 39*/
- 0x00,
- 0x01, /* bInCollection */
- 0x01, /* baInterfaceNr */
- /* 09 byte*/
-
- /* USB Speaker Input Terminal Descriptor */
- AUDIO_INPUT_TERMINAL_DESC_SIZE, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_CONTROL_INPUT_TERMINAL, /* bDescriptorSubtype */
- 0x01, /* bTerminalID */
- 0x01, /* wTerminalType AUDIO_TERMINAL_USB_STREAMING 0x0101 */
- 0x01,
- 0x00, /* bAssocTerminal */
- 0x01, /* bNrChannels */
- 0x00, /* wChannelConfig 0x0000 Mono */
- 0x00,
- 0x00, /* iChannelNames */
- 0x00, /* iTerminal */
- /* 12 byte*/
-
- /* USB Speaker Audio Feature Unit Descriptor */
- 0x09, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_CONTROL_FEATURE_UNIT, /* bDescriptorSubtype */
- AUDIO_OUT_STREAMING_CTRL, /* bUnitID */
- 0x01, /* bSourceID */
- 0x01, /* bControlSize */
- AUDIO_CONTROL_MUTE,// |AUDIO_CONTROL_VOLUME, /* bmaControls(0) */
- 0, /* bmaControls(1) */
- 0x00, /* iTerminal */
- /* 09 byte*/
-
- /*USB Speaker Output Terminal Descriptor */
- 0x09, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_CONTROL_OUTPUT_TERMINAL, /* bDescriptorSubtype */
- 0x03, /* bTerminalID */
- 0x01, /* wTerminalType 0x0301*/
- 0x03,
- 0x00, /* bAssocTerminal */
- 0x02, /* bSourceID */
- 0x00, /* iTerminal */
- /* 09 byte*/
-
- /* USB Speaker Standard AS Interface Descriptor - Audio Streaming Zero Bandwith */
- /* Interface 1, Alternate Setting 0 */
- AUDIO_INTERFACE_DESC_SIZE, /* bLength */
- USB_DESC_TYPE_INTERFACE, /* bDescriptorType */
- 0x01, /* bInterfaceNumber */
- 0x00, /* bAlternateSetting */
- 0x00, /* bNumEndpoints */
- USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
- AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */
- AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
- 0x00, /* iInterface */
- /* 09 byte*/
-
- /* USB Speaker Standard AS Interface Descriptor - Audio Streaming Operational */
- /* Interface 1, Alternate Setting 1 */
- AUDIO_INTERFACE_DESC_SIZE, /* bLength */
- USB_DESC_TYPE_INTERFACE, /* bDescriptorType */
- 0x01, /* bInterfaceNumber */
- 0x01, /* bAlternateSetting */
- 0x01, /* bNumEndpoints */
- USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */
- AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */
- AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */
- 0x00, /* iInterface */
- /* 09 byte*/
-
- /* USB Speaker Audio Streaming Interface Descriptor */
- AUDIO_STREAMING_INTERFACE_DESC_SIZE, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_STREAMING_GENERAL, /* bDescriptorSubtype */
- 0x01, /* bTerminalLink */
- 0x01, /* bDelay */
- 0x01, /* wFormatTag AUDIO_FORMAT_PCM 0x0001*/
- 0x00,
- /* 07 byte*/
-
- /* USB Speaker Audio Type III Format Interface Descriptor */
- 0x0B, /* bLength */
- AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_STREAMING_FORMAT_TYPE, /* bDescriptorSubtype */
- AUDIO_FORMAT_TYPE_III, /* bFormatType */
- 0x02, /* bNrChannels */
- 0x02, /* bSubFrameSize : 2 Bytes per frame (16bits) */
- 16, /* bBitResolution (16-bits per sample) */
- 0x01, /* bSamFreqType only one frequency supported */
- AUDIO_SAMPLE_FREQ(USBD_AUDIO_FREQ), /* Audio sampling frequency coded on 3 bytes */
- /* 11 byte*/
-
- /* Endpoint 1 - Standard Descriptor */
- AUDIO_STANDARD_ENDPOINT_DESC_SIZE, /* bLength */
- USB_DESC_TYPE_ENDPOINT, /* bDescriptorType */
- AUDIO_OUT_EP, /* bEndpointAddress 1 out endpoint*/
- USBD_EP_TYPE_ISOC, /* bmAttributes */
- AUDIO_PACKET_SZE(USBD_AUDIO_FREQ), /* wMaxPacketSize in Bytes (Freq(Samples)*2(Stereo)*2(HalfWord)) */
- 0x01, /* bInterval */
- 0x00, /* bRefresh */
- 0x00, /* bSynchAddress */
- /* 09 byte*/
-
- /* Endpoint - Audio Streaming Descriptor*/
- AUDIO_STREAMING_ENDPOINT_DESC_SIZE, /* bLength */
- AUDIO_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType */
- AUDIO_ENDPOINT_GENERAL, /* bDescriptor */
- 0x00, /* bmAttributes */
- 0x00, /* bLockDelayUnits */
- 0x00, /* wLockDelay */
- 0x00,
- /* 07 byte*/
-} ;
-
-/* USB Standard Device Descriptor */
-__ALIGN_BEGIN static uint8_t USBD_AUDIO_DeviceQualifierDesc[USB_LEN_DEV_QUALIFIER_DESC] __ALIGN_END=
-{
- USB_LEN_DEV_QUALIFIER_DESC,
- USB_DESC_TYPE_DEVICE_QUALIFIER,
- 0x00,
- 0x02,
- 0x00,
- 0x00,
- 0x00,
- 0x40,
- 0x01,
- 0x00,
-};
-
-/**
- * @}
- */
-
-/** @defgroup USBD_AUDIO_Private_Functions
- * @{
- */
-
-/**
- * @brief USBD_AUDIO_Init
- * Initialize the AUDIO interface
- * @param pdev: device instance
- * @param cfgidx: Configuration index
- * @retval status
- */
-static uint8_t USBD_AUDIO_Init (USBD_HandleTypeDef *pdev,
- uint8_t cfgidx)
-{
- USBD_AUDIO_HandleTypeDef *haudio;
-
- /* Open EP OUT */
- USBD_LL_OpenEP(pdev,
- AUDIO_OUT_EP,
- USBD_EP_TYPE_ISOC,
- AUDIO_OUT_PACKET);
-
- /* Allocate Audio structure */
- pdev->pClassData = USBD_malloc(sizeof (USBD_AUDIO_HandleTypeDef));
-
- if(pdev->pClassData == NULL)
- {
- return USBD_FAIL;
- }
- else
- {
- haudio = pdev->pClassData;
- haudio->alt_setting = 0;
- haudio->offset = AUDIO_OFFSET_UNKNOWN;
- haudio->wr_ptr = 0;
- haudio->rd_ptr = 0;
- haudio->rd_enable = 0;
-
- /* Initialize the Audio output Hardware layer */
- if (((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->Init(USBD_AUDIO_FREQ, AUDIO_DEFAULT_VOLUME, 0) != USBD_OK)
- {
- return USBD_FAIL;
- }
-
- /* Prepare Out endpoint to receive 1st packet */
- USBD_LL_PrepareReceive(pdev,
- AUDIO_OUT_EP,
- haudio->buffer,
- AUDIO_OUT_PACKET);
- }
- return USBD_OK;
-}
-
-/**
- * @brief USBD_AUDIO_Init
- * DeInitialize the AUDIO layer
- * @param pdev: device instance
- * @param cfgidx: Configuration index
- * @retval status
- */
-static uint8_t USBD_AUDIO_DeInit (USBD_HandleTypeDef *pdev,
- uint8_t cfgidx)
-{
-
- /* Open EP OUT */
- USBD_LL_CloseEP(pdev,
- AUDIO_OUT_EP);
-
- /* DeInit physical Interface components */
- if(pdev->pClassData != NULL)
- {
- ((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->DeInit(0);
- USBD_free(pdev->pClassData);
- pdev->pClassData = NULL;
- }
-
- return USBD_OK;
-}
-
-/**
- * @brief USBD_AUDIO_Setup
- * Handle the AUDIO specific requests
- * @param pdev: instance
- * @param req: usb requests
- * @retval status
- */
-static uint8_t USBD_AUDIO_Setup (USBD_HandleTypeDef *pdev,
- USBD_SetupReqTypedef *req)
-{
- USBD_AUDIO_HandleTypeDef *haudio;
- uint16_t len;
- uint8_t *pbuf;
- uint8_t ret = USBD_OK;
- haudio = pdev->pClassData;
-
- switch (req->bmRequest & USB_REQ_TYPE_MASK)
- {
- case USB_REQ_TYPE_CLASS :
- switch (req->bRequest)
- {
- case AUDIO_REQ_GET_CUR:
- AUDIO_REQ_GetCurrent(pdev, req);
- break;
-
- case AUDIO_REQ_SET_CUR:
- AUDIO_REQ_SetCurrent(pdev, req);
- break;
-
- default:
- USBD_CtlError (pdev, req);
- ret = USBD_FAIL;
- }
- break;
-
- case USB_REQ_TYPE_STANDARD:
- switch (req->bRequest)
- {
- case USB_REQ_GET_DESCRIPTOR:
- if( (req->wValue >> 8) == AUDIO_DESCRIPTOR_TYPE)
- {
- pbuf = USBD_AUDIO_CfgDesc + 18;
- len = MIN(USB_AUDIO_DESC_SIZ , req->wLength);
-
-
- USBD_CtlSendData (pdev,
- pbuf,
- len);
- }
- break;
-
- case USB_REQ_GET_INTERFACE :
- USBD_CtlSendData (pdev,
- (uint8_t *)haudio->alt_setting,
- 1);
- break;
-
- case USB_REQ_SET_INTERFACE :
- if ((uint8_t)(req->wValue) <= USBD_MAX_NUM_INTERFACES)
- {
- haudio->alt_setting = (uint8_t)(req->wValue);
- }
- else
- {
- /* Call the error management function (command will be nacked */
- USBD_CtlError (pdev, req);
- }
- break;
-
- default:
- USBD_CtlError (pdev, req);
- ret = USBD_FAIL;
- }
- }
- return ret;
-}
-
-
-/**
- * @brief USBD_AUDIO_GetCfgDesc
- * return configuration descriptor
- * @param speed : current device speed
- * @param length : pointer data length
- * @retval pointer to descriptor buffer
- */
-static uint8_t *USBD_AUDIO_GetCfgDesc (uint16_t *length)
-{
- *length = sizeof (USBD_AUDIO_CfgDesc);
- return USBD_AUDIO_CfgDesc;
-}
-
-/**
- * @brief USBD_AUDIO_DataIn
- * handle data IN Stage
- * @param pdev: device instance
- * @param epnum: endpoint index
- * @retval status
- */
-static uint8_t USBD_AUDIO_DataIn (USBD_HandleTypeDef *pdev,
- uint8_t epnum)
-{
-
- /* Only OUT data are processed */
- return USBD_OK;
-}
-
-/**
- * @brief USBD_AUDIO_EP0_RxReady
- * handle EP0 Rx Ready event
- * @param pdev: device instance
- * @retval status
- */
-static uint8_t USBD_AUDIO_EP0_RxReady (USBD_HandleTypeDef *pdev)
-{
- USBD_AUDIO_HandleTypeDef *haudio;
- haudio = pdev->pClassData;
-
- if (haudio->control.cmd == AUDIO_REQ_SET_CUR)
- {/* In this driver, to simplify code, only SET_CUR request is managed */
-
- if (haudio->control.unit == AUDIO_OUT_STREAMING_CTRL)
- {
- ((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->MuteCtl(haudio->control.data[0]);
- haudio->control.cmd = 0;
- haudio->control.len = 0;
- }
- }
-
- return USBD_OK;
-}
-/**
- * @brief USBD_AUDIO_EP0_TxReady
- * handle EP0 TRx Ready event
- * @param pdev: device instance
- * @retval status
- */
-static uint8_t USBD_AUDIO_EP0_TxReady (USBD_HandleTypeDef *pdev)
-{
- /* Only OUT control data are processed */
- return USBD_OK;
-}
-/**
- * @brief USBD_AUDIO_SOF
- * handle SOF event
- * @param pdev: device instance
- * @retval status
- */
-static uint8_t USBD_AUDIO_SOF (USBD_HandleTypeDef *pdev)
-{
- return USBD_OK;
-}
-
-/**
- * @brief USBD_AUDIO_SOF
- * handle SOF event
- * @param pdev: device instance
- * @retval status
- */
-void USBD_AUDIO_Sync (USBD_HandleTypeDef *pdev, AUDIO_OffsetTypeDef offset)
-{
- int8_t shift = 0;
- USBD_AUDIO_HandleTypeDef *haudio;
- haudio = pdev->pClassData;
-
- haudio->offset = offset;
-
-
- if(haudio->rd_enable == 1)
- {
- haudio->rd_ptr += AUDIO_TOTAL_BUF_SIZE/2;
-
- if (haudio->rd_ptr == AUDIO_TOTAL_BUF_SIZE)
- {
- /* roll back */
- haudio->rd_ptr = 0;
- }
- }
-
- if(haudio->rd_ptr > haudio->wr_ptr)
- {
- if((haudio->rd_ptr - haudio->wr_ptr) < AUDIO_OUT_PACKET)
- {
- shift = -4;
- }
- else if((haudio->rd_ptr - haudio->wr_ptr) > (AUDIO_TOTAL_BUF_SIZE - AUDIO_OUT_PACKET))
- {
- shift = 4;
- }
-
- }
- else
- {
- if((haudio->wr_ptr - haudio->rd_ptr) < AUDIO_OUT_PACKET)
- {
- shift = 4;
- }
- else if((haudio->wr_ptr - haudio->rd_ptr) > (AUDIO_TOTAL_BUF_SIZE - AUDIO_OUT_PACKET))
- {
- shift = -4;
- }
- }
-
- if(haudio->offset == AUDIO_OFFSET_FULL)
- {
- ((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->AudioCmd(&haudio->buffer[0],
- AUDIO_TOTAL_BUF_SIZE/2 - shift,
- AUDIO_CMD_PLAY);
- haudio->offset = AUDIO_OFFSET_NONE;
- }
- else if (haudio->offset == AUDIO_OFFSET_HALF)
- {
-
- ((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->AudioCmd(&haudio->buffer[AUDIO_TOTAL_BUF_SIZE/2],
- AUDIO_TOTAL_BUF_SIZE/2 - shift,
- AUDIO_CMD_PLAY);
- haudio->offset = AUDIO_OFFSET_NONE;
-
- }
-}
-/**
- * @brief USBD_AUDIO_IsoINIncomplete
- * handle data ISO IN Incomplete event
- * @param pdev: device instance
- * @param epnum: endpoint index
- * @retval status
- */
-static uint8_t USBD_AUDIO_IsoINIncomplete (USBD_HandleTypeDef *pdev, uint8_t epnum)
-{
-
- return USBD_OK;
-}
-/**
- * @brief USBD_AUDIO_IsoOutIncomplete
- * handle data ISO OUT Incomplete event
- * @param pdev: device instance
- * @param epnum: endpoint index
- * @retval status
- */
-static uint8_t USBD_AUDIO_IsoOutIncomplete (USBD_HandleTypeDef *pdev, uint8_t epnum)
-{
-
- return USBD_OK;
-}
-/**
- * @brief USBD_AUDIO_DataOut
- * handle data OUT Stage
- * @param pdev: device instance
- * @param epnum: endpoint index
- * @retval status
- */
-static uint8_t USBD_AUDIO_DataOut (USBD_HandleTypeDef *pdev,
- uint8_t epnum)
-{
- USBD_AUDIO_HandleTypeDef *haudio;
- haudio = pdev->pClassData;
-
- if (epnum == AUDIO_OUT_EP)
- {
- /* Increment the Buffer pointer or roll it back when all buffers are full */
-
- haudio->wr_ptr += AUDIO_OUT_PACKET;
-
- if (haudio->wr_ptr == AUDIO_TOTAL_BUF_SIZE)
- {/* All buffers are full: roll back */
- haudio->wr_ptr = 0;
-
- if(haudio->offset == AUDIO_OFFSET_UNKNOWN)
- {
- ((USBD_AUDIO_ItfTypeDef *)pdev->pUserData)->AudioCmd(&haudio->buffer[0],
- AUDIO_TOTAL_BUF_SIZE/2,
- AUDIO_CMD_START);
- haudio->offset = AUDIO_OFFSET_NONE;
- }
- }
-
- if(haudio->rd_enable == 0)
- {
- if (haudio->wr_ptr == (AUDIO_TOTAL_BUF_SIZE / 2))
- {
- haudio->rd_enable = 1;
- }
- }
-
- /* Prepare Out endpoint to receive next audio packet */
- USBD_LL_PrepareReceive(pdev,
- AUDIO_OUT_EP,
- &haudio->buffer[haudio->wr_ptr],
- AUDIO_OUT_PACKET);
-
- }
-
- return USBD_OK;
-}
-
-/**
- * @brief AUDIO_Req_GetCurrent
- * Handles the GET_CUR Audio control request.
- * @param pdev: instance
- * @param req: setup class request
- * @retval status
- */
-static void AUDIO_REQ_GetCurrent(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req)
-{
- USBD_AUDIO_HandleTypeDef *haudio;
- haudio = pdev->pClassData;
-
- memset(haudio->control.data, 0, 64);
- /* Send the current mute state */
- USBD_CtlSendData (pdev,
- haudio->control.data,
- req->wLength);
-}
-
-/**
- * @brief AUDIO_Req_SetCurrent
- * Handles the SET_CUR Audio control request.
- * @param pdev: instance
- * @param req: setup class request
- * @retval status
- */
-static void AUDIO_REQ_SetCurrent(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req)
-{
- USBD_AUDIO_HandleTypeDef *haudio;
- haudio = pdev->pClassData;
-
- if (req->wLength)
- {
- /* Prepare the reception of the buffer over EP0 */
- USBD_CtlPrepareRx (pdev,
- haudio->control.data,
- req->wLength);
-
- haudio->control.cmd = AUDIO_REQ_SET_CUR; /* Set the request value */
- haudio->control.len = req->wLength; /* Set the request data length */
- haudio->control.unit = HIBYTE(req->wIndex); /* Set the request target unit */
- }
-}
-
-
-/**
-* @brief DeviceQualifierDescriptor
-* return Device Qualifier descriptor
-* @param length : pointer data length
-* @retval pointer to descriptor buffer
-*/
-static uint8_t *USBD_AUDIO_GetDeviceQualifierDesc (uint16_t *length)
-{
- *length = sizeof (USBD_AUDIO_DeviceQualifierDesc);
- return USBD_AUDIO_DeviceQualifierDesc;
-}
-
-/**
-* @brief USBD_AUDIO_RegisterInterface
-* @param fops: Audio interface callback
-* @retval status
-*/
-uint8_t USBD_AUDIO_RegisterInterface (USBD_HandleTypeDef *pdev,
- USBD_AUDIO_ItfTypeDef *fops)
-{
- if(fops != NULL)
- {
- pdev->pUserData= fops;
- }
- return 0;
-}
-/**
- * @}
- */
-
-
-/**
- * @}
- */
-
-
-/**
- * @}
- */
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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