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87 lines
2.2 KiB
87 lines
2.2 KiB
10 months ago
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//
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// usbminidexedmidigadget.h
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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//
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// Based on circle/usb/gadget/usbmidigadget.h
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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 3 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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#ifndef _usbminidexedmidigadget_h
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#define _usbminidexedmidigadget_h
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#include <circle/usb/gadget/usbmidigadget.h>
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#include <circle/usb/gadget/usbmidigadgetendpoint.h>
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#include <circle/sysconfig.h>
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#include <assert.h>
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class CUSBMiniDexedMIDIGadget : public CUSBMIDIGadget
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{
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private:
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#define MDSTRINGDESCRIPTORS 3
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const char *const s_MiniDexedStringDescriptor[MDSTRINGDESCRIPTORS] =
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{
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"\x04\x03\x09\x04", // Language ID
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"probonopd",
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"MiniDexed"
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};
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public:
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CUSBMiniDexedMIDIGadget (CInterruptSystem *pInterruptSystem)
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: CUSBMIDIGadget (pInterruptSystem)
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{
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}
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~CUSBMiniDexedMIDIGadget (void)
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{
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assert(0);
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}
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protected:
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// Override GetDescriptor frmo CUSBMIDIGadget.
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// See CUSBMIDIGadget for details.
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// This will only act on the DESCRIPOR_STRING.
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// All other descriptors are returned from USBMIDIGadget.
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//
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const void *GetDescriptor (u16 wValue, u16 wIndex, size_t *pLength) override
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{
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assert (pLength);
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u8 uchDescIndex = wValue & 0xFF;
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switch (wValue >> 8)
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{
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case DESCRIPTOR_STRING:
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if (!uchDescIndex)
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{
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*pLength = (u8) s_MiniDexedStringDescriptor[0][0];
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return s_MiniDexedStringDescriptor[0];
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}
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else if (uchDescIndex < MDSTRINGDESCRIPTORS)
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{
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return CUSBMIDIGadget::ToStringDescriptor (s_MiniDexedStringDescriptor[uchDescIndex], pLength);
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}
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break;
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default:
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break;
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}
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return CUSBMIDIGadget::GetDescriptor(wValue, wIndex, pLength);
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}
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};
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#endif
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