v1.0.0 for hardware-PWM on nRF52 boards

### Initial Releases v1.0.0

1. Initial coding to support **nRF52-based boards, such as AdaFruit Itsy-Bitsy nRF52840, Feather nRF52840 Express, Seeed XIAO nRF52840, Seeed XIAO nRF52840 Sense**, etc. using [`Adafruit nRF52 core`](https://github.com/adafruit/Adafruit_nRF52_Arduino) or [`Seeeduino nRF52 core`](https://github.com/Seeed-Studio/Adafruit_nRF52_Arduino)

Author: khoih-prog

Packages_Patches/Seeeduino/hardware/nrf52/1.0.0/cores/nRF5/Print.cpp

@@ -0,0 +1,123 @@
+/*
+  Copyright (c) 2016 Arduino LLC.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the GNU Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#pragma once
+
+#include <inttypes.h>
+#include <stdio.h> // for size_t
+
+#include "WString.h"
+#include "Printable.h"
+
+#define DEC 10
+#define HEX 16
+#define OCT 8
+#define BIN 2
+
+class Print
+{
+  private:
+    int write_error;
+    size_t printNumber(unsigned long, uint8_t);
+    size_t printULLNumber(unsigned long long, uint8_t);
+    size_t printFloat(double, int);
+  protected:
+    void setWriteError(int err = 1)
+    {
+      write_error = err;
+    }
+  public:
+    Print() : write_error(0) {}
+
+    int getWriteError()
+    {
+      return write_error;
+    }
+    void clearWriteError()
+    {
+      setWriteError(0);
+    }
+
+    virtual size_t write(uint8_t) = 0;
+    size_t write(const char *str)
+    {
+      if (str == NULL)
+        return 0;
+
+      return write((const uint8_t *)str, strlen(str));
+    }
+    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);
+    }
+
+    // default to zero, meaning "a single write may block"
+    // should be overridden by subclasses with buffering
+    virtual int availableForWrite()
+    {
+      return 0;
+    }
+
+    size_t print(const __FlashStringHelper *);
+    size_t print(const String &);
+    size_t print(const char[]);
+    size_t print(char);
+    size_t print(unsigned char, int = DEC);
+    size_t print(int, int = DEC);
+    size_t print(unsigned int, int = DEC);
+    size_t print(long, int = DEC);
+    size_t print(unsigned long, int = DEC);
+    size_t print(long long, int = DEC);
+    size_t print(unsigned long long, int = DEC);
+    size_t print(double, int = 2);
+    size_t print(const Printable&);
+
+    size_t println(const __FlashStringHelper *);
+    size_t println(const String &s);
+    size_t println(const char[]);
+    size_t println(char);
+    size_t println(unsigned char, int = DEC);
+    size_t println(int, int = DEC);
+    size_t println(unsigned int, int = DEC);
+    size_t println(long, int = DEC);
+    size_t println(unsigned long, int = DEC);
+    size_t println(long long, int = DEC);
+    size_t println(unsigned long long, int = DEC);
+    size_t println(double, int = 2);
+    size_t println(const Printable&);
+    size_t println(void);
+
+    size_t printf(const char * format, ...);
+
+    size_t printBuffer(uint8_t const buffer[], int len, char delim = ' ', int byteline = 0);
+    size_t printBuffer(char const buffer[], int size, char delim = ' ', int byteline = 0)
+    {
+      return printBuffer((uint8_t const*) buffer, size, delim, byteline);
+    }
+
+    size_t printBufferReverse(uint8_t const buffer[], int len, char delim = ' ', int byteline = 0);
+    size_t printBufferReverse(char const buffer[], int size, char delim = ' ', int byteline = 0)
+    {
+      return printBufferReverse((uint8_t const*) buffer, size, delim, byteline);
+    }
+
+    virtual void flush() { /* Empty implementation for backward compatibility */ }
+};
+
+

Packages_Patches/Seeeduino/hardware/nrf52/1.0.0/cores/nRF5/Print.h

@@ -0,0 +1,100 @@
+/*
+    Udp.cpp: Library to send/receive UDP packets.
+
+   NOTE: UDP is fast, but has some important limitations (thanks to Warren Gray for mentioning these)
+   1) UDP does not guarantee the order in which assembled UDP packets are received. This
+   might not happen often in practice, but in larger network topologies, a UDP
+   packet can be received out of sequence.
+   2) UDP does not guard against lost packets - so packets *can* disappear without the sender being
+   aware of it. Again, this may not be a concern in practice on small local networks.
+   For more information, see http://www.cafeaulait.org/course/week12/35.html
+
+   MIT License:
+   Copyright (c) 2008 Bjoern Hartmann
+   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.
+
+   [email protected] 12/30/2008
+*/
+
+#ifndef udp_h
+#define udp_h
+
+#include <Stream.h>
+#include <IPAddress.h>
+
+class UDP : public Stream
+{
+
+  public:
+    virtual uint8_t begin(uint16_t) =
+      0; // initialize, start listening on specified port. Returns 1 if successful, 0 if there are no sockets available to use
+
+    // KH, add virtual function to support Multicast, necessary for many services (MDNS, UPnP, etc.)
+    virtual uint8_t beginMulticast(IPAddress, uint16_t)
+    {
+      return 0;  // initialize, start listening on specified multicast IP address and port. Returns 1 if successful, 0 on failure
+    }
+
+    virtual void stop() = 0; // Finish with the UDP socket
+
+    // Sending UDP packets
+
+    // Start building up a packet to send to the remote host specific in ip and port
+    // Returns 1 if successful, 0 if there was a problem with the supplied IP address or port
+    virtual int beginPacket(IPAddress ip, uint16_t port) = 0;
+    // Start building up a packet to send to the remote host specific in host and port
+    // Returns 1 if successful, 0 if there was a problem resolving the hostname or port
+    virtual int beginPacket(const char *host, uint16_t port) = 0;
+    // Finish off this packet and send it
+    // Returns 1 if the packet was sent successfully, 0 if there was an error
+    virtual int endPacket() = 0;
+    // Write a single byte into the packet
+    virtual size_t write(uint8_t) = 0;
+    // Write size bytes from buffer into the packet
+    virtual size_t write(const uint8_t *buffer, size_t size) = 0;
+
+    // Start processing the next available incoming packet
+    // Returns the size of the packet in bytes, or 0 if no packets are available
+    virtual int parsePacket() = 0;
+    // Number of bytes remaining in the current packet
+    virtual int available() = 0;
+    // Read a single byte from the current packet
+    virtual int read() = 0;
+    // Read up to len bytes from the current packet and place them into buffer
+    // Returns the number of bytes read, or 0 if none are available
+    virtual int read(unsigned char* buffer, size_t len) = 0;
+    // Read up to len characters from the current packet and place them into buffer
+    // Returns the number of characters read, or 0 if none are available
+    virtual int read(char* buffer, size_t len) = 0;
+    // Return the next byte from the current packet without moving on to the next byte
+    virtual int peek() = 0;
+    virtual void flush() = 0; // Finish reading the current packet
+
+    // Return the IP address of the host who sent the current incoming packet
+    virtual IPAddress remoteIP() = 0;
+    // Return the port of the host who sent the current incoming packet
+    virtual uint16_t remotePort() = 0;
+  protected:
+    uint8_t* rawIPAddress(IPAddress& addr)
+    {
+      return addr.raw_address();
+    };
+};
+
+#endif