MTP_Standalone
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Outline
Includes
#include "main.h"
Private variables
WavHandles
NumObs
Private function prototypes
MTP_Init()
MTP_ExploreWavFile()
MTP_GetData(uint32_t, uint32_t, uint32_t, uint8_t *, uint32_t *)
MTP_GetWavObjectNumber()
MTP_GetWavObjectName(uint16_t, uint8_t *)
MTP_GetWavObjectHandles()
Files
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SourceVuSTM32 Libraries and SamplesMTP_StandaloneSrc/mtp.c
 
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/** ****************************************************************************** * @file USB_Host/MTP_Standalone/Src/mtp.c * @author MCD Application Team * @brief This file provides APIs to explorer MTP Storage Objects ****************************************************************************** * @attention * * Copyright (c) 2017 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** *//* ... */ /* Includes ------------------------------------------------------------------*/ #include "main.h" Includes /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private typedef -----------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ MTP_ObjectHandlesTypedef WavHandles; uint32_t NumObs = 0; Private variables /* Private function prototypes -----------------------------------------------*/ static uint8_t MTP_GetWavObjectHandles(void); Private function prototypes /* Private functions ---------------------------------------------------------*/ /** * @brief Starts Audio streaming. * @param None * @retval Returns 0 if OK, otherwise 1. *//* ... */ uint8_t MTP_Init(void) { static uint8_t is_initialized = 0; uint8_t ret = 1; if(is_initialized == 0) { if(USBH_MTP_IsReady(&hUSBHost) > 0) { if(USBH_MTP_GetNumObjects(&hUSBHost, 0, PTP_OFC_WAV, 0xFFFFFFFF, &NumObs) == USBH_OK) { /* Get objects handlers */ if(MTP_GetWavObjectHandles() == 0) { is_initialized = 1; ret = 0; }if (MTP_GetWavObjectHandles() == 0) { ... } }if (USBH_MTP_GetNumObjects(&hUSBHost, 0, PTP_OFC_WAV, 0xFFFFFFFF, &NumObs) == USBH_OK) { ... } }if (USBH_MTP_IsReady(&hUSBHost) > 0) { ... } }if (is_initialized == 0) { ... } else { ret = 0; }else { ... } return ret; }{ ... } /** * @brief Explores Wav Files. * @param None * @retval Returns 0 if OK, otherwise 1. *//* ... */ uint8_t MTP_ExploreWavFile(void) { uint8_t ret = 1; uint32_t index; MTP_ObjectInfoTypedef objectinfo; MTP_Init(); if(USBH_MTP_IsReady(&hUSBHost) > 0) { LCD_UsrLog("\nAvailable wav files:\n"); /* Get Available WAV files number */ if((NumObs = MTP_GetWavObjectNumber()) > 0) { /* Get objects handlers */ if(MTP_GetWavObjectHandles() == 0) { ret = 0; for (index = 0; index < NumObs; index ++) { if( USBH_MTP_GetObjectInfo(&hUSBHost, WavHandles.Handler[index], &objectinfo) == USBH_OK) { LCD_DbgLog(" %lu- %s\n", index, objectinfo.Filename); }if (USBH_MTP_GetObjectInfo(&hUSBHost, WavHandles.Handler[index], &objectinfo) == USBH_OK) { ... } else { ret = 1; }else { ... } }for (index = 0; index < NumObs; index ++) { ... } }if (MTP_GetWavObjectHandles() == 0) { ... } }if ((NumObs = MTP_GetWavObjectNumber()) > 0) { ... } }if (USBH_MTP_IsReady(&hUSBHost) > 0) { ... } else { LCD_ErrLog("MTP Device Not yet ready...\n"); }else { ... } return ret; }{ ... } /** * @brief Gets Data from MTP Device. * @param file_idx: File index * @param offset: Offset * @param maxbytes: Max bytes * @param object: Pointer to the file object * @param len: Pointer to the file length * @retval Returns Status 0 if OK, otherwise 1. *//* ... */ uint8_t MTP_GetData(uint32_t file_idx, uint32_t offset, uint32_t maxbytes, uint8_t *object, uint32_t *len) { USBH_MTP_GetPartialObject(&hUSBHost, WavHandles.Handler[file_idx], offset, maxbytes, object, len); return 0; }{ ... } /** * @brief Gets Wav Object Number. * @param None * @retval Number of Wav object files *//* ... */ uint16_t MTP_GetWavObjectNumber(void) { return NumObs; }{ ... } /** * @brief Gets Wav Object Names. * @param None * @retval Returns Status 0 if OK, otherwise 1. *//* ... */ uint8_t MTP_GetWavObjectName(uint16_t object_index, uint8_t *filename) { uint8_t ret = 1; MTP_ObjectInfoTypedef objectinfo; if(USBH_MTP_GetObjectInfo(&hUSBHost, WavHandles.Handler[object_index], &objectinfo) == USBH_OK) { strcpy((char *)filename, (char *)objectinfo.Filename); ret = 0; }if (USBH_MTP_GetObjectInfo(&hUSBHost, WavHandles.Handler[object_index], &objectinfo) == USBH_OK) { ... } return ret; }{ ... } /** * @brief Gets Wav Object Handles. * @param None * @retval Returns Status 0 if OK, otherwise 1. *//* ... */ static uint8_t MTP_GetWavObjectHandles(void) { uint8_t ret = 1; /* Get objects handlers */ if(USBH_MTP_GetObjectHandles(&hUSBHost, 0, PTP_OFC_WAV, 0xFFFFFFFF, &WavHandles) == USBH_OK) { ret = 0; }if (USBH_MTP_GetObjectHandles(&hUSBHost, 0, PTP_OFC_WAV, 0xFFFFFFFF, &WavHandles) == USBH_OK) { ... } return ret; }{ ... }
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