remove tinyusb core submodule, move tinyusb src to its own library to reduce dependency

Author: hathach

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "cores/arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore"]
-	path = cores/arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore
-	url = https://github.com/adafruit/Adafruit_TinyUSB_ArduinoCore.git

cores/arduino/Arduino.h

@@ -150,12 +150,13 @@ void loop( void ) ;
 
 // USB
 #ifdef USE_TINYUSB
-#include "Adafruit_TinyUSB_Core.h"
+  #include "Adafruit_USBD_Interface.h"
+  #include "Adafruit_USBD_CDC.h"
 #else
-#include "USB/USBDesc.h"
-#include "USB/USBCore.h"
-#include "USB/USBAPI.h"
-#include "USB/USB_host.h"
+  #include "USB/USBDesc.h"
+  #include "USB/USBCore.h"
+  #include "USB/USBAPI.h"
+  #include "USB/USB_host.h"
 #endif
 
 #endif // Arduino_h

cores/arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore

@@ -0,0 +1,73 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach for Adafruit Industries
+ *
+ * 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:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * 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.
+ */
+
+#ifndef ADAFRUIT_USBD_CDC_H_
+#define ADAFRUIT_USBD_CDC_H_
+
+#ifdef __cplusplus
+
+#include "Adafruit_USBD_Interface.h"
+#include "Stream.h"
+
+class Adafruit_USBD_CDC : public Stream, public Adafruit_USBD_Interface
+{
+public:
+	Adafruit_USBD_CDC(void);
+
+	// fron Adafruit_USBD_Interface
+	virtual uint16_t getDescriptor(uint8_t itfnum, uint8_t* buf, uint16_t bufsize);
+
+	void setPins(uint8_t pin_rx, uint8_t pin_tx) { (void) pin_rx; (void) pin_tx; }
+	void begin(uint32_t baud_count);
+	void begin(uint32_t baud, uint8_t config);
+	void end(void);
+
+	// return line coding set by host
+	uint32_t baud(void);
+	uint8_t  stopbits(void);
+	uint8_t  paritytype(void);
+	uint8_t  numbits(void);
+	int      dtr(void);
+
+	// Stream API
+	virtual int    available(void);
+	virtual int    peek(void);
+	virtual int    read(void);
+	virtual void   flush(void);
+	virtual size_t write(uint8_t);
+
+	virtual size_t write(const uint8_t *buffer, size_t size);
+	size_t write(const char *buffer, size_t size) {
+	  return write((const uint8_t *)buffer, size);
+	}
+
+	virtual int availableForWrite(void);
+	using Print::write; // pull in write(str) from Print
+	operator bool();
+};
+
+extern Adafruit_USBD_CDC Serial;
+
+#endif // __cplusplus
+#endif

cores/arduino/TinyUSB/Adafruit_TinyUSB_SAMD.cpp

@@ -0,0 +1,45 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Ha Thach (tinyusb.org) for Adafruit Industries
+ *
+ * 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:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * 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.
+ */
+
+#ifndef ADAFRUIT_USBD_INTERFACE_H_
+#define ADAFRUIT_USBD_INTERFACE_H_
+
+#ifdef __cplusplus
+
+class Adafruit_USBD_Interface
+{
+  protected:
+    const char* _desc_str;
+
+  public:
+    Adafruit_USBD_Interface(void) { _desc_str = NULL; }
+
+    virtual uint16_t getDescriptor(uint8_t itfnum, uint8_t* buf, uint16_t bufsize) = 0;
+    void setStringDescriptor(const char* str) { _desc_str = str; }
+    const char* getStringDescriptor(void) { return _desc_str; }
+};
+
+#endif
+
+#endif

cores/arduino/TinyUSB/Adafruit_USBD_CDC.h

@@ -24,6 +24,11 @@
 void initVariant() __attribute__((weak));
 void initVariant() { }
 
+#ifdef USE_TINYUSB
+// Called by main.cpp to initialize usb device typically with CDC device for Serial
+void Adafruit_TinyUSB_Device_init(uint8_t rhport) __attribute__((weak));
+#endif
+
 // Initialize C library
 extern "C" void __libc_init_array(void);
 
@@ -41,7 +46,7 @@ int main( void )
   delay(1);
 
 #if defined(USE_TINYUSB)
-  Adafruit_TinyUSB_Core_init();
+  Adafruit_TinyUSB_Device_init(0);
 #elif defined(USBCON)
   USBDevice.init();
   USBDevice.attach();
@@ -59,14 +64,3 @@ int main( void )
 
   return 0;
 }
-
-#if defined(USE_TINYUSB)
-
-// run TinyUSB background task when yield()
-extern  "C" void yield(void)
-{
-  tud_task();
-  tud_cdc_write_flush();
-}
-
-#endif

cores/arduino/TinyUSB/Adafruit_USBD_Interface.h

@@ -242,10 +242,7 @@ extern Uart Serial1;
 //
 // SERIAL_PORT_HARDWARE_OPEN  Hardware serial ports which are open for use.  Their RX & TX
 //                            pins are NOT connected to anything by default.
-#define SERIAL_PORT_USBVIRTUAL      SerialUSB
-#define SERIAL_PORT_MONITOR         SerialUSB
+#define SERIAL_PORT_USBVIRTUAL      Serial
+#define SERIAL_PORT_MONITOR         Serial
 #define SERIAL_PORT_HARDWARE        Serial1
 #define SERIAL_PORT_HARDWARE_OPEN   Serial1
-
-// Alias Serial to SerialUSB
-#define Serial                      SerialUSB