mirror of
https://github.com/felis/USB_Host_Shield_2.0.git
synced 2024-03-22 11:31:26 +01:00
698 lines
27 KiB
C++
698 lines
27 KiB
C++
/*
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*******************************************************************************
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* USB-MIDI class driver for USB Host Shield 2.0 Library
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* Copyright (c) 2012-2022 Yuuichi Akagawa
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*
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* Idea from LPK25 USB-MIDI to Serial MIDI converter
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* by Collin Cunningham - makezine.com, narbotic.com
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*
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* for use with USB Host Shield 2.0 from Circuitsathome.com
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* https://github.com/felis/USB_Host_Shield_2.0
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*******************************************************************************
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*******************************************************************************
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*/
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#include "usbh_midi.h"
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// To enable serial debugging see "settings.h"
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//#define EXTRADEBUG // Uncomment to get even more debugging data
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//////////////////////////
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// MIDI MESAGES
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// midi.org/techspecs/
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//////////////////////////
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// STATUS BYTES
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// 0x8n == noteOff
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// 0x9n == noteOn
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// 0xAn == afterTouch
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// 0xBn == controlChange
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// n == Channel(0x0-0xf)
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//////////////////////////
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//DATA BYTE 1
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// note# == (0-127)
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// or
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// control# == (0-119)
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//////////////////////////
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// DATA BYTE 2
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// velocity == (0-127)
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// or
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// controlVal == (0-127)
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///////////////////////////////////////////////////////////////////////////////
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// USB-MIDI Event Packets
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// usb.org - Universal Serial Bus Device Class Definition for MIDI Devices 1.0
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///////////////////////////////////////////////////////////////////////////////
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//+-------------+-------------+-------------+-------------+
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//| Byte 0 | Byte 1 | Byte 2 | Byte 3 |
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//+------+------+-------------+-------------+-------------+
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//|Cable | Code | | | |
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//|Number|Index | MIDI_0 | MIDI_1 | MIDI_2 |
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//| |Number| | | |
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//|(4bit)|(4bit)| (8bit) | (8bit) | (8bit) |
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//+------+------+-------------+-------------+-------------+
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// CN == 0x0-0xf
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//+-----+-----------+-------------------------------------------------------------------
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//| CIN |MIDI_x size|Description
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//+-----+-----------+-------------------------------------------------------------------
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//| 0x0 | 1, 2 or 3 |Miscellaneous function codes. Reserved for future extensions.
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//| 0x1 | 1, 2 or 3 |Cable events. Reserved for future expansion.
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//| 0x2 | 2 |Two-byte System Common messages like MTC, SongSelect, etc.
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//| 0x3 | 3 |Three-byte System Common messages like SPP, etc.
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//| 0x4 | 3 |SysEx starts or continues
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//| 0x5 | 1 |Single-byte System Common Message or SysEx ends with following single byte.
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//| 0x6 | 2 |SysEx ends with following two bytes.
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//| 0x7 | 3 |SysEx ends with following three bytes.
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//| 0x8 | 3 |Note-off
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//| 0x9 | 3 |Note-on
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//| 0xA | 3 |Poly-KeyPress
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//| 0xB | 3 |Control Change
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//| 0xC | 2 |Program Change
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//| 0xD | 2 |Channel Pressure
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//| 0xE | 3 |PitchBend Change
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//| 0xF | 1 |Single Byte
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//+-----+-----------+-------------------------------------------------------------------
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USBH_MIDI::USBH_MIDI(USB *p) :
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pUsb(p),
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bAddress(0),
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bPollEnable(false),
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readPtr(0) {
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// initialize endpoint data structures
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for(uint8_t i=0; i<MIDI_MAX_ENDPOINTS; i++) {
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epInfo[i].epAddr = 0;
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epInfo[i].maxPktSize = (i) ? 0 : 8;
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epInfo[i].bmNakPower = (i) ? USB_NAK_NOWAIT : USB_NAK_MAX_POWER;
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}
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// register in USB subsystem
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if (pUsb) {
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pUsb->RegisterDeviceClass(this);
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}
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}
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/* Connection initialization of an MIDI Device */
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uint8_t USBH_MIDI::Init(uint8_t parent, uint8_t port, bool lowspeed)
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{
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uint8_t buf[sizeof (USB_DEVICE_DESCRIPTOR)];
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USB_DEVICE_DESCRIPTOR * udd = reinterpret_cast<USB_DEVICE_DESCRIPTOR*>(buf);
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uint8_t rcode;
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UsbDevice *p = NULL;
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EpInfo *oldep_ptr = NULL;
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uint8_t num_of_conf; // number of configurations
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uint8_t bConfNum = 0; // configuration number
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uint8_t bNumEP = 1; // total number of EP in the configuration
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USBTRACE("\rMIDI Init\r\n");
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#ifdef DEBUG_USB_HOST
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Notify(PSTR("USBH_MIDI version "), 0x80), D_PrintHex((uint8_t) (USBH_MIDI_VERSION / 10000), 0x80), D_PrintHex((uint8_t) (USBH_MIDI_VERSION / 100 % 100), 0x80), D_PrintHex((uint8_t) (USBH_MIDI_VERSION % 100), 0x80), Notify(PSTR("\r\n"), 0x80);
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#endif
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//for reconnect
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for(uint8_t i=epDataInIndex; i<=epDataOutIndex; i++) {
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epInfo[i].bmSndToggle = 0;
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epInfo[i].bmRcvToggle = 0;
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// If you want to retry if you get a NAK response when sending, enable the following:
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// epInfo[i].bmNakPower = (i==epDataOutIndex) ? 10 : USB_NAK_NOWAIT;
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}
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// get memory address of USB device address pool
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AddressPool &addrPool = pUsb->GetAddressPool();
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// check if address has already been assigned to an instance
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if (bAddress) {
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return USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE;
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}
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// Get pointer to pseudo device with address 0 assigned
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p = addrPool.GetUsbDevicePtr(bAddress);
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if (!p) {
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return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
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}
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if (!p->epinfo) {
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return USB_ERROR_EPINFO_IS_NULL;
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}
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// Save old pointer to EP_RECORD of address 0
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oldep_ptr = p->epinfo;
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// Temporary assign new pointer to epInfo to p->epinfo in order to avoid toggle inconsistence
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p->epinfo = epInfo;
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p->lowspeed = lowspeed;
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// First Device Descriptor Request (Initially first 8 bytes)
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// https://techcommunity.microsoft.com/t5/microsoft-usb-blog/how-does-usb-stack-enumerate-a-device/ba-p/270685#_First_Device_Descriptor
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rcode = pUsb->getDevDescr( 0, 0, 8, (uint8_t*)buf );
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// Restore p->epinfo
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p->epinfo = oldep_ptr;
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if( rcode ){
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goto FailGetDevDescr;
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}
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// Allocate new address according to device class
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bAddress = addrPool.AllocAddress(parent, false, port);
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if (!bAddress) {
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return USB_ERROR_OUT_OF_ADDRESS_SPACE_IN_POOL;
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}
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// Extract Max Packet Size from device descriptor
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epInfo[0].maxPktSize = udd->bMaxPacketSize0;
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// Assign new address to the device
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rcode = pUsb->setAddr( 0, 0, bAddress );
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if (rcode) {
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p->lowspeed = false;
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addrPool.FreeAddress(bAddress);
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bAddress = 0;
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return rcode;
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}//if (rcode...
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USBTRACE2("Addr:", bAddress);
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p->lowspeed = false;
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//get pointer to assigned address record
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p = addrPool.GetUsbDevicePtr(bAddress);
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if (!p) {
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return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
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}
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p->lowspeed = lowspeed;
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// Second Device Descriptor Request (Full)
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rcode = pUsb->getDevDescr( bAddress, 0, sizeof(USB_DEVICE_DESCRIPTOR), (uint8_t*)buf );
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if( rcode ){
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goto FailGetDevDescr;
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}
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vid = udd->idVendor;
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pid = udd->idProduct;
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num_of_conf = udd->bNumConfigurations;
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// Assign epInfo to epinfo pointer
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rcode = pUsb->setEpInfoEntry(bAddress, 1, epInfo);
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if (rcode) {
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USBTRACE("setEpInfoEntry failed");
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goto FailSetDevTblEntry;
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}
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USBTRACE("VID:"), D_PrintHex(vid, 0x80);
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USBTRACE(" PID:"), D_PrintHex(pid, 0x80);
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USBTRACE2(" #Conf:", num_of_conf);
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//Setup for well known vendor/device specific configuration
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bTransferTypeMask = bmUSB_TRANSFER_TYPE;
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setupDeviceSpecific();
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// STEP1: Check if attached device is a MIDI device and fill endpoint data structure
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USBTRACE("\r\nSTEP1: MIDI Start\r\n");
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for(uint8_t i = 0; i < num_of_conf; i++) {
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MidiDescParser midiDescParser(this, true); // Check for MIDI device
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rcode = pUsb->getConfDescr(bAddress, 0, i, &midiDescParser);
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if(rcode) // Check error code
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goto FailGetConfDescr;
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bNumEP += midiDescParser.getNumEPs();
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if(bNumEP > 1) {// All endpoints extracted
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bConfNum = midiDescParser.getConfValue();
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break;
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}
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}
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USBTRACE2("STEP1: MIDI,NumEP:", bNumEP);
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//Found the MIDI device?
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if( bNumEP == 1 ){ //Device not found.
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USBTRACE("MIDI not found.\r\nSTEP2: Attempts vendor specific bulk device\r\n");
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// STEP2: Check if attached device is a MIDI device and fill endpoint data structure
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for(uint8_t i = 0; i < num_of_conf; i++) {
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MidiDescParser midiDescParser(this, false); // Allow all devices, vendor specific class with Bulk transfer
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rcode = pUsb->getConfDescr(bAddress, 0, i, &midiDescParser);
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if(rcode) // Check error code
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goto FailGetConfDescr;
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bNumEP += midiDescParser.getNumEPs();
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if(bNumEP > 1) {// All endpoints extracted
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bConfNum = midiDescParser.getConfValue();
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break;
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}
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}
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USBTRACE2("\r\nSTEP2: Vendor,NumEP:", bNumEP);
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}
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if( bNumEP < 2 ){ //Device not found.
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rcode = 0xff;
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goto FailGetConfDescr;
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}
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// Assign epInfo to epinfo pointer
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rcode = pUsb->setEpInfoEntry(bAddress, 3, epInfo);
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USBTRACE2("Conf:", bConfNum);
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USBTRACE2("EPin :", (uint8_t)(epInfo[epDataInIndex].epAddr + 0x80));
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USBTRACE2("EPout:", epInfo[epDataOutIndex].epAddr);
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// Set Configuration Value
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rcode = pUsb->setConf(bAddress, 0, bConfNum);
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if (rcode)
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goto FailSetConfDescr;
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bPollEnable = true;
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if(pFuncOnInit)
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pFuncOnInit(); // Call the user function
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USBTRACE("Init done.\r\n");
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return 0;
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FailGetDevDescr:
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FailSetDevTblEntry:
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FailGetConfDescr:
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FailSetConfDescr:
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Release();
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return rcode;
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}
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/* Performs a cleanup after failed Init() attempt */
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uint8_t USBH_MIDI::Release()
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{
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if(pFuncOnRelease && bPollEnable)
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pFuncOnRelease(); // Call the user function
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pUsb->GetAddressPool().FreeAddress(bAddress);
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bAddress = 0;
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bPollEnable = false;
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readPtr = 0;
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return 0;
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}
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/* Setup for well known vendor/device specific configuration */
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void USBH_MIDI::setupDeviceSpecific()
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{
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// Novation
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if( vid == 0x1235 ) {
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// LaunchPad and LaunchKey endpoint attribute is interrupt
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// https://github.com/YuuichiAkagawa/USBH_MIDI/wiki/Novation-USB-Product-ID-List
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// LaunchPad: 0x20:S, 0x36:Mini, 0x51:Pro, 0x69:MK2
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if( pid == 0x20 || pid == 0x36 || pid == 0x51 || pid == 0x69 ) {
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bTransferTypeMask = 2;
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return;
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}
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// LaunchKey: 0x30-32, 0x35:Mini, 0x7B-0x7D:MK2, 0x0102,0x113-0x122:MiniMk3, 0x134-0x137:MK3
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if( (0x30 <= pid && pid <= 0x32) || pid == 0x35 || (0x7B <= pid && pid <= 0x7D)
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|| pid == 0x102 || (0x113 <= pid && pid <= 0x122) || (0x134 <= pid && pid <= 0x137) ) {
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bTransferTypeMask = 2;
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return;
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}
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}
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}
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/* Receive data from MIDI device */
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uint8_t USBH_MIDI::RecvData(uint16_t *bytes_rcvd, uint8_t *dataptr)
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{
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*bytes_rcvd = (uint16_t)epInfo[epDataInIndex].maxPktSize;
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uint8_t r = pUsb->inTransfer(bAddress, epInfo[epDataInIndex].epAddr, bytes_rcvd, dataptr);
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#ifdef EXTRADEBUG
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if( r )
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USBTRACE2("inTransfer():", r);
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#endif
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if( *bytes_rcvd < (MIDI_EVENT_PACKET_SIZE-4)){
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dataptr[*bytes_rcvd] = '\0';
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dataptr[(*bytes_rcvd)+1] = '\0';
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}
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return r;
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}
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/* Receive data from MIDI device */
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uint8_t USBH_MIDI::RecvData(uint8_t *outBuf, bool isRaw)
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{
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uint8_t rcode = 0; //return code
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uint16_t rcvd;
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if( bPollEnable == false ) return 0;
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//Checking unprocessed message in buffer.
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if( readPtr != 0 && readPtr < MIDI_EVENT_PACKET_SIZE ){
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if(recvBuf[readPtr] == 0 && recvBuf[readPtr+1] == 0) {
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//no unprocessed message left in the buffer.
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}else{
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goto RecvData_return_from_buffer;
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}
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}
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readPtr = 0;
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rcode = RecvData( &rcvd, recvBuf);
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if( rcode != 0 ) {
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return 0;
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}
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//if all data is zero, no valid data received.
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if( recvBuf[0] == 0 && recvBuf[1] == 0 && recvBuf[2] == 0 && recvBuf[3] == 0 ) {
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return 0;
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}
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RecvData_return_from_buffer:
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uint8_t m;
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uint8_t cin = recvBuf[readPtr];
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if( isRaw == true ) {
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*(outBuf++) = cin;
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}
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readPtr++;
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*(outBuf++) = m = recvBuf[readPtr++];
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*(outBuf++) = recvBuf[readPtr++];
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*(outBuf++) = recvBuf[readPtr++];
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return getMsgSizeFromCin(cin & 0x0f);
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}
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/* Send data to MIDI device */
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uint8_t USBH_MIDI::SendData(uint8_t *dataptr, uint8_t nCable)
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{
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uint8_t buf[4];
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uint8_t status = dataptr[0];
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uint8_t cin = convertStatus2Cin(status);
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if ( status == 0xf0 ) {
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// SysEx long message
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return SendSysEx(dataptr, countSysExDataSize(dataptr), nCable);
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}
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//Building USB-MIDI Event Packets
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buf[0] = (uint8_t)(nCable << 4) | cin;
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buf[1] = dataptr[0];
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uint8_t msglen = getMsgSizeFromCin(cin);
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switch(msglen) {
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//3 bytes message
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case 3 :
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buf[2] = dataptr[1];
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buf[3] = dataptr[2];
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break;
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//2 bytes message
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case 2 :
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buf[2] = dataptr[1];
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buf[3] = 0;
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break;
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//1 byte message
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case 1 :
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buf[2] = 0;
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buf[3] = 0;
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break;
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default :
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break;
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}
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#ifdef EXTRADEBUG
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//Dump for raw USB-MIDI event packet
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Notify(PSTR("SendData():"), 0x80), D_PrintHex((buf[0]), 0x80), D_PrintHex((buf[1]), 0x80), D_PrintHex((buf[2]), 0x80), D_PrintHex((buf[3]), 0x80), Notify(PSTR("\r\n"), 0x80);
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#endif
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return pUsb->outTransfer(bAddress, epInfo[epDataOutIndex].epAddr, 4, buf);
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}
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#ifdef DEBUG_USB_HOST
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void USBH_MIDI::PrintEndpointDescriptor( const USB_ENDPOINT_DESCRIPTOR* ep_ptr )
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{
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USBTRACE("Endpoint descriptor:\r\n");
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USBTRACE2(" Length:\t", ep_ptr->bLength);
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USBTRACE2(" Type:\t\t", ep_ptr->bDescriptorType);
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USBTRACE2(" Address:\t", ep_ptr->bEndpointAddress);
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USBTRACE2(" Attributes:\t", ep_ptr->bmAttributes);
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USBTRACE2(" MaxPktSize:\t", ep_ptr->wMaxPacketSize);
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USBTRACE2(" Poll Intrv:\t", ep_ptr->bInterval);
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}
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#endif
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/* look up a MIDI message size from spec */
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/*Return */
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/* 0 : undefined message */
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/* 0<: Vaild message size(1-3) */
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//uint8_t USBH_MIDI::lookupMsgSize(uint8_t midiMsg, uint8_t cin)
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uint8_t USBH_MIDI::lookupMsgSize(uint8_t status, uint8_t cin)
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{
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if( cin == 0 ){
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cin = convertStatus2Cin(status);
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}
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return getMsgSizeFromCin(cin);
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}
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/* SysEx data size counter */
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uint16_t USBH_MIDI::countSysExDataSize(uint8_t *dataptr)
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{
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uint16_t c = 1;
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if( *dataptr != 0xf0 ){ //not SysEx
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return 0;
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}
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//Search terminator(0xf7)
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while(*dataptr != 0xf7) {
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dataptr++;
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c++;
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//Limiter (default: 256 bytes)
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if(c > MIDI_MAX_SYSEX_SIZE){
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c = 0;
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break;
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}
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}
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return c;
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}
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/* Send SysEx message to MIDI device */
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uint8_t USBH_MIDI::SendSysEx(uint8_t *dataptr, uint16_t datasize, uint8_t nCable)
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{
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uint8_t buf[MIDI_EVENT_PACKET_SIZE];
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uint8_t rc = 0;
|
|
uint16_t n = datasize;
|
|
uint8_t wptr = 0;
|
|
uint8_t maxpkt = epInfo[epDataInIndex].maxPktSize;
|
|
|
|
USBTRACE("SendSysEx:\r\t");
|
|
USBTRACE2(" Length:\t", datasize);
|
|
#ifdef EXTRADEBUG
|
|
uint16_t pktSize = (n+2)/3; //Calculate total USB MIDI packet size
|
|
USBTRACE2(" Total pktSize:\t", pktSize);
|
|
#endif
|
|
|
|
while(n > 0) {
|
|
//Byte 0
|
|
buf[wptr] = (nCable << 4) | 0x4; //x4 SysEx starts or continues
|
|
|
|
switch ( n ) {
|
|
case 1 :
|
|
buf[wptr++] = (nCable << 4) | 0x5; //x5 SysEx ends with following single byte.
|
|
buf[wptr++] = *(dataptr++);
|
|
buf[wptr++] = 0x00;
|
|
buf[wptr++] = 0x00;
|
|
n = 0;
|
|
break;
|
|
case 2 :
|
|
buf[wptr++] = (nCable << 4) | 0x6; //x6 SysEx ends with following two bytes.
|
|
buf[wptr++] = *(dataptr++);
|
|
buf[wptr++] = *(dataptr++);
|
|
buf[wptr++] = 0x00;
|
|
n = 0;
|
|
break;
|
|
case 3 :
|
|
buf[wptr] = (nCable << 4) | 0x7; //x7 SysEx ends with following three bytes.
|
|
// fall through
|
|
default :
|
|
wptr++;
|
|
buf[wptr++] = *(dataptr++);
|
|
buf[wptr++] = *(dataptr++);
|
|
buf[wptr++] = *(dataptr++);
|
|
n = n - 3;
|
|
break;
|
|
}
|
|
|
|
if( wptr >= maxpkt || n == 0 ){ //Reach a maxPktSize or data end.
|
|
USBTRACE2(" wptr:\t", wptr);
|
|
if( (rc = pUsb->outTransfer(bAddress, epInfo[epDataOutIndex].epAddr, wptr, buf)) != 0 ){
|
|
break;
|
|
}
|
|
wptr = 0; //rewind write pointer
|
|
}
|
|
}
|
|
return(rc);
|
|
}
|
|
|
|
uint8_t USBH_MIDI::extractSysExData(uint8_t *p, uint8_t *buf)
|
|
{
|
|
uint8_t rc = 0;
|
|
uint8_t cin = *(p) & 0x0f;
|
|
|
|
//SysEx message?
|
|
if( (cin & 0xc) != 4 ) return rc;
|
|
|
|
switch(cin) {
|
|
case 4:
|
|
case 7:
|
|
*buf++ = *(p+1);
|
|
*buf++ = *(p+2);
|
|
*buf++ = *(p+3);
|
|
rc = 3;
|
|
break;
|
|
case 6:
|
|
*buf++ = *(p+1);
|
|
*buf++ = *(p+2);
|
|
rc = 2;
|
|
break;
|
|
case 5:
|
|
*buf++ = *(p+1);
|
|
rc = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return(rc);
|
|
}
|
|
|
|
// Configuration Descriptor Parser
|
|
// Copied from confdescparser.h and modifiy.
|
|
MidiDescParser::MidiDescParser(UsbMidiConfigXtracter *xtractor, bool modeMidi) :
|
|
theXtractor(xtractor),
|
|
stateParseDescr(0),
|
|
dscrLen(0),
|
|
dscrType(0),
|
|
nEPs(0),
|
|
isMidiSearch(modeMidi){
|
|
theBuffer.pValue = varBuffer;
|
|
valParser.Initialize(&theBuffer);
|
|
theSkipper.Initialize(&theBuffer);
|
|
}
|
|
void MidiDescParser::Parse(const uint16_t len, const uint8_t *pbuf, const uint16_t &offset __attribute__((unused))) {
|
|
uint16_t cntdn = (uint16_t)len;
|
|
uint8_t *p = (uint8_t*)pbuf;
|
|
|
|
while(cntdn)
|
|
if(!ParseDescriptor(&p, &cntdn))
|
|
return;
|
|
}
|
|
|
|
bool MidiDescParser::ParseDescriptor(uint8_t **pp, uint16_t *pcntdn) {
|
|
USB_CONFIGURATION_DESCRIPTOR* ucd = reinterpret_cast<USB_CONFIGURATION_DESCRIPTOR*>(varBuffer);
|
|
USB_INTERFACE_DESCRIPTOR* uid = reinterpret_cast<USB_INTERFACE_DESCRIPTOR*>(varBuffer);
|
|
switch(stateParseDescr) {
|
|
case 0:
|
|
theBuffer.valueSize = 2;
|
|
valParser.Initialize(&theBuffer);
|
|
stateParseDescr = 1;
|
|
// fall through
|
|
case 1:
|
|
if(!valParser.Parse(pp, pcntdn))
|
|
return false;
|
|
dscrLen = *((uint8_t*)theBuffer.pValue);
|
|
dscrType = *((uint8_t*)theBuffer.pValue + 1);
|
|
stateParseDescr = 2;
|
|
// fall through
|
|
case 2:
|
|
// This is a sort of hack. Assuming that two bytes are all ready in the buffer
|
|
// the pointer is positioned two bytes ahead in order for the rest of descriptor
|
|
// to be read right after the size and the type fields.
|
|
// This should be used carefully. varBuffer should be used directly to handle data
|
|
// in the buffer.
|
|
theBuffer.pValue = varBuffer + 2;
|
|
stateParseDescr = 3;
|
|
// fall through
|
|
case 3:
|
|
switch(dscrType) {
|
|
case USB_DESCRIPTOR_INTERFACE:
|
|
isGoodInterface = false;
|
|
break;
|
|
case USB_DESCRIPTOR_CONFIGURATION:
|
|
case USB_DESCRIPTOR_ENDPOINT:
|
|
case HID_DESCRIPTOR_HID:
|
|
break;
|
|
}
|
|
theBuffer.valueSize = dscrLen - 2;
|
|
valParser.Initialize(&theBuffer);
|
|
stateParseDescr = 4;
|
|
// fall through
|
|
case 4:
|
|
switch(dscrType) {
|
|
case USB_DESCRIPTOR_CONFIGURATION:
|
|
if(!valParser.Parse(pp, pcntdn))
|
|
return false;
|
|
confValue = ucd->bConfigurationValue;
|
|
break;
|
|
case USB_DESCRIPTOR_INTERFACE:
|
|
if(!valParser.Parse(pp, pcntdn))
|
|
return false;
|
|
USBTRACE("Interface descriptor:\r\n");
|
|
USBTRACE2(" Inf#:\t\t", uid->bInterfaceNumber);
|
|
USBTRACE2(" Alt:\t\t", uid->bAlternateSetting);
|
|
USBTRACE2(" EPs:\t\t", uid->bNumEndpoints);
|
|
USBTRACE2(" IntCl:\t\t", uid->bInterfaceClass);
|
|
USBTRACE2(" IntSubcl:\t", uid->bInterfaceSubClass);
|
|
USBTRACE2(" Protocol:\t", uid->bInterfaceProtocol);
|
|
// MIDI check mode ?
|
|
if( isMidiSearch ){ //true: MIDI Streaming, false: ALL
|
|
if( uid->bInterfaceClass == USB_CLASS_AUDIO && uid->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING ) {
|
|
// MIDI found.
|
|
USBTRACE("+MIDI found\r\n\r\n");
|
|
}else{
|
|
USBTRACE("-MIDI not found\r\n\r\n");
|
|
break;
|
|
}
|
|
}
|
|
isGoodInterface = true;
|
|
// Initialize the counter if no two endpoints can be found in one interface.
|
|
if(nEPs < 2)
|
|
// reset endpoint counter
|
|
nEPs = 0;
|
|
break;
|
|
case USB_DESCRIPTOR_ENDPOINT:
|
|
if(!valParser.Parse(pp, pcntdn))
|
|
return false;
|
|
if(isGoodInterface && nEPs < 2){
|
|
USBTRACE(">Extracting endpoint\r\n");
|
|
if( theXtractor->EndpointXtract(confValue, 0, 0, 0, (USB_ENDPOINT_DESCRIPTOR*)varBuffer) )
|
|
nEPs++;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if(!theSkipper.Skip(pp, pcntdn, dscrLen - 2))
|
|
return false;
|
|
}
|
|
theBuffer.pValue = varBuffer;
|
|
stateParseDescr = 0;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/* Extracts endpoint information from config descriptor */
|
|
bool USBH_MIDI::EndpointXtract(uint8_t conf __attribute__((unused)),
|
|
uint8_t iface __attribute__((unused)),
|
|
uint8_t alt __attribute__((unused)),
|
|
uint8_t proto __attribute__((unused)),
|
|
const USB_ENDPOINT_DESCRIPTOR *pep)
|
|
{
|
|
uint8_t index;
|
|
|
|
#ifdef DEBUG_USB_HOST
|
|
PrintEndpointDescriptor(pep);
|
|
#endif
|
|
// Is the endpoint transfer type bulk?
|
|
if((pep->bmAttributes & bTransferTypeMask) == USB_TRANSFER_TYPE_BULK) {
|
|
USBTRACE("+valid EP found.\r\n");
|
|
index = (pep->bEndpointAddress & 0x80) == 0x80 ? epDataInIndex : epDataOutIndex;
|
|
} else {
|
|
USBTRACE("-No valid EP found.\r\n");
|
|
return false;
|
|
}
|
|
|
|
// Fill the rest of endpoint data structure
|
|
epInfo[index].epAddr = (pep->bEndpointAddress & 0x0F);
|
|
// The maximum packet size for the USB Host Shield 2.0 library is 64 bytes.
|
|
if(pep->wMaxPacketSize > MIDI_EVENT_PACKET_SIZE) {
|
|
epInfo[index].maxPktSize = MIDI_EVENT_PACKET_SIZE;
|
|
} else {
|
|
epInfo[index].maxPktSize = (uint8_t)pep->wMaxPacketSize;
|
|
}
|
|
|
|
return true;
|
|
}
|