add webusb rgb with neopixel example

Author: hathach

examples/WebUSB/webusb_rgb/webusb_rgb.ino

@@ -0,0 +1,89 @@
+/*********************************************************************
+ Adafruit invests time and resources providing this open source code,
+ please support Adafruit and open-source hardware by purchasing
+ products from Adafruit!
+
+ MIT license, check LICENSE for more information
+ Copyright (c) 2019 Ha Thach for Adafruit Industries
+ All text above, and the splash screen below must be included in
+ any redistribution
+*********************************************************************/
+
+/* This sketch demonstrates WebUSB as web serial with Chrome browser.
+ * After enumerated successfully, Chrome will pop-up notification
+ * with URL to landing page, click on it to test
+ *  - Click "Connect" and select device, When connected the on-board LED will litted up.
+ *  - Any charaters received from either webusb/Serial will be echo back to webusb and Serial
+ *  
+ * Note: 
+ * - The WebUSB landing page notification is currently disabled in Chrome 
+ * on Windows due to Chromium issue 656702 (https://crbug.com/656702). You have to 
+ * go to https://adafruit.github.io/Adafruit_TinyUSB_Arduino/examples/webusb-serial to test
+ * 
+ * - On Windows 7 and prior: You need to use Zadig tool to manually bind the 
+ * WebUSB interface with the WinUSB driver for Chrome to access. From windows 8 and 10, this
+ * is done automatically by firmware.
+ */
+
+#include "Adafruit_TinyUSB.h"
+#include <Adafruit_NeoPixel.h>
+
+// Which pin on the Arduino is connected to the NeoPixels?
+// On a Trinket or Gemma we suggest changing this to 1
+// use on-board neopixel PIN_NEOPIXEL if existed
+#ifdef PIN_NEOPIXEL
+  #define PIN      PIN_NEOPIXEL
+#else
+  #define PIN      6
+#endif
+
+// How many NeoPixels are attached to the Arduino?
+#define NUMPIXELS  1
+
+// When we setup the NeoPixel library, we tell it how many pixels, and which pin to use to send signals.
+// Note that for older NeoPixel strips you might need to change the third parameter--see the strandtest
+// example for more information on possible values.
+Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
+
+// USB WebUSB object
+Adafruit_USBD_WebUSB usb_web;
+
+// Landing Page: scheme (0: http, 1: https), url
+WEBUSB_URL_DEF(landingPage, 1 /*https*/, "adafruit.github.io/Adafruit_TinyUSB_Arduino/examples/webusb-rgb");
+
+// the setup function runs once when you press reset or power the board
+void setup()
+{
+  usb_web.begin();
+  usb_web.setLandingPage(&landingPage);
+  usb_web.setLineStateCallback(line_state_callback);
+
+  Serial.begin(115200);
+
+  // This initializes the NeoPixel with RED
+  pixels.begin();
+  pixels.setBrightness(50);
+  pixels.setPixelColor(0, 0xff0000);
+  pixels.show();
+
+  // wait until device mounted
+  while( !USBDevice.mounted() ) delay(1);
+
+  Serial.println("TinyUSB WebUSB RGB example");
+}
+
+void loop()
+{
+  // Landing Page send 3 bytes of color as RGB
+  if (usb_web.available() < 3 ) return;
+
+  pixels.setPixelColor(0, usb_web.read(), usb_web.read(), usb_web.read());
+  pixels.show();
+}
+
+void line_state_callback(bool connected)
+{
+  // connected = green, disconnected = red
+  pixels.setPixelColor(0, connected ? 0x00ff00 : 0xff0000);
+  pixels.show();
+}

examples/WebUSB/webusb_serial/webusb_serial.ino

@@ -9,8 +9,6 @@
  any redistribution
 *********************************************************************/
 
-#include "Adafruit_TinyUSB.h"
-
 /* This sketch demonstrates WebUSB as web serial with Chrome browser.
  * After enumerated successfully, Chrome will pop-up notification
  * with URL to landing page, click on it to test
@@ -27,6 +25,8 @@
  * is done automatically by firmware.
  */
 
+#include "Adafruit_TinyUSB.h"
+
 // USB WebUSB object
 Adafruit_USBD_WebUSB usb_web;
 
@@ -50,7 +50,7 @@ void setup()
   // wait until device mounted
   while( !USBDevice.mounted() ) delay(1);
 
-  Serial.println("TinyUSB WebUSB example");
+  Serial.println("TinyUSB WebUSB Serial example");
 }
 
 // function to echo to both Serial and WebUSB
@@ -76,5 +76,5 @@ void line_state_callback(bool connected)
 {
   digitalWrite(led_pin, connected);
 
-  if ( connected ) usb_web.println("TinyUSB WebUSB example");
+  if ( connected ) usb_web.println("TinyUSB WebUSB Serial example");
 }