Create usb_mtp.h

mtp file derived from rawhid and modified slightly

teensy4/usb_mtp.h

+/* Teensyduino Core Library
+ * http://www.pjrc.com/teensy/
+ * Copyright (c) 2017 PJRC.COM, LLC.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * 1. The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * 2. If the Software is incorporated into a build system that allows
+ * selection among a list of target devices, then similar target
+ * devices manufactured by PJRC.COM must be included in the list of
+ * target devices and selectable in the same manner.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+
+#include "usb_desc.h"
+
+#if defined(MTP_INTERFACE)
+
+#include <inttypes.h>
+
+// C language implementation
+#ifdef __cplusplus
+extern "C" {
+#endif
+void usb_mtp_configure(void);
+int usb_mtp_recv(void *buffer, uint32_t timeout);
+int usb_mtp_available(void);
+int usb_mtp_send(const void *buffer, uint32_t len, uint32_t timeout);
+#ifdef __cplusplus
+}
+#endif
+
+
+// C++ interface
+#ifdef __cplusplus
+class usb_mtp_class
+{
+public:
+	int available(void) {return usb_mtp_available(); }
+	int recv(void *buffer, uint32_t timeout) { return usb_mtp_recv(buffer, timeout); }
+	int send(const void *buffer, uint32_t len, uint32_t timeout) { return usb_mtp_send(buffer, len, timeout); }
+};
+
+extern usb_mtp_class mtp;
+
+#endif // __cplusplus
+
+#endif // MTP_INTERFACE