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Merge pull request #611 from GregBurns/midi_usbh
MIDI USB Host support
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Middlewares/ST/STM32_USB_Host_Library/Class/MIDI/Inc/usbh_midi.h
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,87 @@ | ||
| /** | ||
| ****************************************************************************** | ||
| * @file usbh_midi.h | ||
| * @author Greg Burns | ||
| * @author MCD Application Team | ||
| * @brief This file contains all the prototypes for the usbh_midi.c | ||
| ****************************************************************************** | ||
| * @attention | ||
| * | ||
| * <h2><center>© Copyright (c) 2015 STMicroelectronics. | ||
| * All rights reserved.</center></h2> | ||
| * | ||
| * This software component is licensed by ST under Ultimate Liberty license | ||
| * SLA0044, the "License"; You may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at: | ||
| * www.st.com/SLA0044 | ||
| * | ||
| ****************************************************************************** | ||
| */ | ||
|
|
||
| /* Define to prevent recursive ----------------------------------------------*/ | ||
| #ifndef __USBH_MIDI_H | ||
| #define __USBH_MIDI_H | ||
|
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| #ifdef __cplusplus | ||
| extern "C" { | ||
| #endif | ||
|
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| /* Includes ------------------------------------------------------------------*/ | ||
| #include "usbh_core.h" | ||
|
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| typedef enum { | ||
| MIDI_INIT = 0, | ||
| MIDI_IDLE, | ||
| MIDI_RX, | ||
| MIDI_RX_POLL, | ||
| MIDI_RX_ERROR, | ||
| MIDI_FATAL_ERROR | ||
| } MIDI_StateTypeDef; | ||
|
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| typedef enum { | ||
| MIDI_OK, | ||
| MIDI_BUSY, | ||
| MIDI_ERROR | ||
| } MIDI_ErrorTypeDef; | ||
|
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| typedef void (*USBH_MIDI_RxCallback)(uint8_t* buff, size_t len, void* pUser); | ||
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| #define USBH_MIDI_RX_BUF_SIZE 64 | ||
|
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| /* Structure for MIDI process */ | ||
| typedef struct _MIDI_Process { | ||
| uint8_t InPipe; | ||
| uint8_t InEp; | ||
| uint16_t InEpSize; | ||
| uint8_t OutPipe; | ||
| uint8_t OutEp; | ||
| uint16_t OutEpSize; | ||
| MIDI_StateTypeDef state; | ||
| MIDI_ErrorTypeDef error; | ||
| USBH_MIDI_RxCallback callback; | ||
| void* pUser; | ||
| uint8_t rxBuffer[USBH_MIDI_RX_BUF_SIZE]; | ||
| } MIDI_HandleTypeDef; | ||
|
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| /* MIDI Class Codes */ | ||
| #define USB_AUDIO_CLASS 0x01U | ||
| #define USB_MIDI_STREAMING_SUBCLASS 0x03U | ||
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| extern USBH_ClassTypeDef USBH_midi; | ||
| #define USBH_MIDI_CLASS &USBH_midi | ||
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| uint8_t USBH_MIDI_IsReady(USBH_HandleTypeDef *phost); | ||
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| MIDI_ErrorTypeDef USBH_MIDI_Transmit(USBH_HandleTypeDef *phost, | ||
| uint8_t* data, size_t len); | ||
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| void USBH_MIDI_SetReceiveCallback(USBH_HandleTypeDef *phost, | ||
| USBH_MIDI_RxCallback cb, void* pUser); | ||
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| #ifdef __cplusplus | ||
| } | ||
| #endif | ||
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| #endif /* __USBH_MIDI_H */ | ||
|
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| /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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Middlewares/ST/STM32_USB_Host_Library/Class/MIDI/Src/usbh_midi.c
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,251 @@ | ||
| /** | ||
| ****************************************************************************** | ||
| * @attention | ||
| * | ||
| * <h2><center>© Copyright (c) 2015 STMicroelectronics. | ||
| * All rights reserved.</center></h2> | ||
| * | ||
| * This software component is licensed by ST under Ultimate Liberty license | ||
| * SLA0044, the "License"; You may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at: | ||
| * www.st.com/SLA0044 | ||
| * | ||
| ****************************************************************************** | ||
| */ | ||
|
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| #include "usbh_midi.h" | ||
| #include "daisy_core.h" | ||
|
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| static MIDI_HandleTypeDef DMA_BUFFER_MEM_SECTION static_midi; | ||
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| static USBH_StatusTypeDef USBH_MIDI_InterfaceInit(USBH_HandleTypeDef *phost); | ||
| static USBH_StatusTypeDef USBH_MIDI_InterfaceDeInit(USBH_HandleTypeDef *phost); | ||
| static USBH_StatusTypeDef USBH_MIDI_Process(USBH_HandleTypeDef *phost); | ||
| static USBH_StatusTypeDef USBH_MIDI_ClassRequest(USBH_HandleTypeDef *phost); | ||
| static USBH_StatusTypeDef USBH_MIDI_SOFProcess(USBH_HandleTypeDef *phost); | ||
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| USBH_ClassTypeDef USBH_midi = { | ||
| "MIDI", | ||
| USB_AUDIO_CLASS, | ||
| USBH_MIDI_InterfaceInit, | ||
| USBH_MIDI_InterfaceDeInit, | ||
| USBH_MIDI_ClassRequest, | ||
| USBH_MIDI_Process, | ||
| USBH_MIDI_SOFProcess, | ||
| NULL, | ||
| }; | ||
|
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| #define EP_IN 0x80U | ||
|
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| /** | ||
| * @brief USBH_MIDI_InterfaceInit | ||
| * The function init the MIDI class. | ||
| * @param phost: Host handle | ||
| * @retval USBH Status | ||
| */ | ||
| static USBH_StatusTypeDef USBH_MIDI_InterfaceInit(USBH_HandleTypeDef *phost) | ||
| { | ||
| USBH_UsrLog(__FUNCTION__); | ||
| USBH_StatusTypeDef status; | ||
| MIDI_HandleTypeDef *MIDI_Handle; | ||
|
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| // Single static instance of midi handle | ||
| phost->pActiveClass->pData = &static_midi; | ||
| MIDI_Handle = (MIDI_HandleTypeDef*)phost->pActiveClass->pData; | ||
| USBH_memset(MIDI_Handle, 0, sizeof(MIDI_HandleTypeDef)); | ||
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| uint8_t interface = USBH_FindInterface(phost, phost->pActiveClass->ClassCode, | ||
| USB_MIDI_STREAMING_SUBCLASS, 0xFFU); | ||
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| if ((interface == 0xFFU) || (interface >= USBH_MAX_NUM_INTERFACES)) { | ||
| USBH_DbgLog("Cannot find interface for %s class.", phost->pActiveClass->Name); | ||
| return USBH_FAIL; | ||
| } | ||
| status = USBH_SelectInterface(phost, interface); | ||
| if (status != USBH_OK) { | ||
| return USBH_FAIL; | ||
| } | ||
|
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| /* Find the endpoints */ | ||
| for (int ep = 0; ep < phost->device.CfgDesc.Itf_Desc[interface].bNumEndpoints; ++ep) { | ||
| if (phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[ep].bEndpointAddress & EP_IN) { | ||
| MIDI_Handle->InEp = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[ep].bEndpointAddress; | ||
| MIDI_Handle->InEpSize = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[ep].wMaxPacketSize & 0x03FFU; | ||
| if (MIDI_Handle->InEpSize > USBH_MIDI_RX_BUF_SIZE) { | ||
| MIDI_Handle->InEpSize = USBH_MIDI_RX_BUF_SIZE; | ||
| } | ||
| /* Allocate and open input pipe */ | ||
| MIDI_Handle->InPipe = USBH_AllocPipe(phost, MIDI_Handle->InEp); | ||
| USBH_OpenPipe(phost, MIDI_Handle->InPipe, MIDI_Handle->InEp, | ||
| phost->device.address, phost->device.speed, USB_EP_TYPE_BULK, | ||
| MIDI_Handle->InEpSize); | ||
| (void)USBH_LL_SetToggle(phost, MIDI_Handle->InPipe, 0U); | ||
| USBH_UsrLog("InEP[%d] %02x size=%u", ep, MIDI_Handle->InEp, MIDI_Handle->InEpSize); | ||
| } else { | ||
| MIDI_Handle->OutEp = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[ep].bEndpointAddress; | ||
| MIDI_Handle->OutEpSize = phost->device.CfgDesc.Itf_Desc[interface].Ep_Desc[ep].wMaxPacketSize & 0x03FFU; | ||
| /* Allocate and open output pipe */ | ||
| MIDI_Handle->OutPipe = USBH_AllocPipe(phost, MIDI_Handle->OutEp); | ||
| USBH_OpenPipe(phost, MIDI_Handle->OutPipe, MIDI_Handle->OutEp, | ||
| phost->device.address, phost->device.speed, USB_EP_TYPE_BULK, | ||
| MIDI_Handle->OutEpSize); | ||
| (void)USBH_LL_SetToggle(phost, MIDI_Handle->OutPipe, 0U); | ||
| USBH_UsrLog("OutEP[%d] %02x size=%u", ep, MIDI_Handle->OutEp, MIDI_Handle->OutEpSize); | ||
| } | ||
| } | ||
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| MIDI_Handle->state = MIDI_INIT; | ||
| MIDI_Handle->error = MIDI_OK; | ||
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| return USBH_OK; | ||
| } | ||
|
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| /** | ||
| * @brief USBH_MIDI_InterfaceDeInit | ||
| * The function DeInit the Pipes used for the MIDI class. | ||
| * @param phost: Host handle | ||
| * @retval USBH Status | ||
| */ | ||
| static USBH_StatusTypeDef USBH_MIDI_InterfaceDeInit(USBH_HandleTypeDef *phost) | ||
| { | ||
| USBH_UsrLog(__FUNCTION__); | ||
| MIDI_HandleTypeDef *MIDI_Handle = (MIDI_HandleTypeDef *) phost->pActiveClass->pData; | ||
| if (MIDI_Handle) { | ||
| if (MIDI_Handle->InPipe) { | ||
| USBH_ClosePipe(phost, MIDI_Handle->InPipe); | ||
| USBH_FreePipe(phost, MIDI_Handle->InPipe); | ||
| MIDI_Handle->InPipe = 0U; /* Reset the Channel as Free */ | ||
| } | ||
| if (MIDI_Handle->OutPipe) { | ||
| USBH_ClosePipe(phost, MIDI_Handle->OutPipe); | ||
| USBH_FreePipe(phost, MIDI_Handle->OutPipe); | ||
| MIDI_Handle->InPipe = 0U; /* Reset the Channel as Free */ | ||
| } | ||
| phost->pActiveClass->pData = 0U; | ||
| MIDI_Handle->state = MIDI_INIT; | ||
| MIDI_Handle->error = MIDI_OK; | ||
| } | ||
| return USBH_OK; | ||
| } | ||
|
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| /** | ||
| * @brief USBH_MIDI_ClassRequest | ||
| * The function is responsible for handling Standard requests | ||
| * for MIDI class. | ||
| * @param phost: Host handle | ||
| * @retval USBH Status | ||
| */ | ||
| static USBH_StatusTypeDef USBH_MIDI_ClassRequest(USBH_HandleTypeDef *phost) | ||
| { | ||
| phost->pUser(phost, HOST_USER_CLASS_ACTIVE); | ||
| return USBH_OK; | ||
| } | ||
|
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| /** | ||
| * @brief USBH_MIDI_Process | ||
| * The function is for managing state machine for MIDI data transfers | ||
| * @param phost: Host handle | ||
| * @retval USBH Status | ||
| */ | ||
| static USBH_StatusTypeDef USBH_MIDI_Process(USBH_HandleTypeDef *phost) | ||
| { | ||
| if (!phost->pActiveClass || !phost->pActiveClass->pData) | ||
| return USBH_FAIL; | ||
|
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| MIDI_HandleTypeDef *hMidi = (MIDI_HandleTypeDef*)phost->pActiveClass->pData; | ||
| USBH_StatusTypeDef error = USBH_OK; | ||
| USBH_URBStateTypeDef rxStatus; | ||
|
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| switch (hMidi->state) { | ||
| case MIDI_INIT: | ||
| hMidi->state = MIDI_IDLE; | ||
| break; | ||
| case MIDI_IDLE: | ||
| hMidi->state = MIDI_RX; | ||
| break; | ||
| case MIDI_RX: | ||
| // Always returns USBH_OK, call USBH_LL_GetURBState() for status | ||
| USBH_BulkReceiveData(phost, hMidi->rxBuffer, hMidi->InEpSize, hMidi->InPipe); | ||
| hMidi->state = MIDI_RX_POLL; | ||
| break; | ||
| case MIDI_RX_POLL: | ||
| rxStatus = USBH_LL_GetURBState(phost, hMidi->InPipe); | ||
| if (rxStatus == USBH_URB_NOTREADY || rxStatus == USBH_URB_IDLE) { | ||
| hMidi->state = MIDI_RX_POLL; | ||
| } else if (rxStatus == USBH_URB_DONE) { | ||
| size_t sz = USBH_LL_GetLastXferSize(phost, hMidi->InPipe); | ||
| hMidi->state = MIDI_RX; | ||
| if (hMidi->callback) { | ||
| hMidi->callback(hMidi->rxBuffer, sz, hMidi->pUser); | ||
| } | ||
| } else { | ||
| hMidi->state = MIDI_RX_ERROR; | ||
| error = USBH_FAIL; | ||
| } | ||
| break; | ||
| case MIDI_RX_ERROR: | ||
| error = USBH_ClrFeature(phost, hMidi->InEp); | ||
| if (error == USBH_FAIL) { | ||
| USBH_MIDI_InterfaceDeInit(phost); | ||
| hMidi->state = MIDI_FATAL_ERROR; | ||
| } else { | ||
| hMidi->state = MIDI_IDLE; | ||
| } | ||
| break; | ||
| case MIDI_FATAL_ERROR: | ||
| return USBH_FAIL; | ||
| } | ||
| return error; | ||
| } | ||
|
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| /** | ||
| * @brief USBH_MIDI_SOFProcess | ||
| * The function is for SOF state | ||
| * @param phost: Host handle | ||
| * @retval USBH Status | ||
| */ | ||
| static USBH_StatusTypeDef USBH_MIDI_SOFProcess(USBH_HandleTypeDef *phost) | ||
| { | ||
| /* Prevent unused argument(s) compilation warning */ | ||
| UNUSED(phost); | ||
| return USBH_OK; | ||
| } | ||
|
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| void USBH_MIDI_SetReceiveCallback(USBH_HandleTypeDef *phost, USBH_MIDI_RxCallback cb, void* pUser) | ||
| { | ||
| USBH_UsrLog(__FUNCTION__); | ||
| MIDI_HandleTypeDef *hMidi = (MIDI_HandleTypeDef*)phost->pActiveClass->pData; | ||
| hMidi->callback = cb; | ||
| hMidi->pUser = pUser; | ||
| } | ||
|
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| MIDI_ErrorTypeDef USBH_MIDI_Transmit(USBH_HandleTypeDef *phost, uint8_t* data, size_t len) | ||
| { | ||
| MIDI_HandleTypeDef *hMidi = (MIDI_HandleTypeDef*)phost->pActiveClass->pData; | ||
| int numUrbs = 0; | ||
| // This only blocks if data won't fit into one URB | ||
| while(len) | ||
| { | ||
| USBH_URBStateTypeDef txStatus = USBH_LL_GetURBState(phost, hMidi->OutPipe); | ||
| while(txStatus != USBH_URB_IDLE && txStatus != USBH_URB_DONE) | ||
| { | ||
| if(txStatus == USBH_URB_ERROR || txStatus == USBH_URB_STALL) | ||
| { | ||
| USBH_ClrFeature(phost, hMidi->OutEp); | ||
| return MIDI_ERROR; | ||
| } | ||
| if(numUrbs == 0) | ||
| return MIDI_BUSY; | ||
|
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| // Give previous URB time to complete | ||
| USBH_Delay(2); | ||
| } | ||
| size_t sz = (len <= hMidi->OutEpSize) ? len : hMidi->OutEpSize; | ||
| USBH_BulkSendData(phost, data, sz, hMidi->OutPipe, 1); | ||
| len -= sz; | ||
| ++numUrbs; | ||
| } | ||
| return MIDI_OK; | ||
| } | ||
|
|
||
| /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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