增加Arduino使用的example

部分源自：ricmoo/QRCode#12

Signed-off-by: Meco Man <920369182@qq.com>

examples/QRCode/QRCode.ino

@@ -0,0 +1,56 @@
+/**
+ *  QRCode
+ *
+ *  A quick example of generating a QR code.
+ *
+ *  This prints the QR code to the serial monitor as solid blocks. Each module
+ *  is two characters wide, since the monospace font used in the serial monitor
+ *  is approximately twice as tall as wide.
+ *
+ */
+
+#include "qrcode.h"
+
+void setup() {
+    Serial.begin(115200);
+
+    // Start time
+    uint32_t dt = millis();
+
+    // Create the QR code
+    QRCode qrcode;
+    uint8_t qrcodeData[qrcode_getBufferSize(3)];
+    qrcode_initText(&qrcode, qrcodeData, 3, 0, "HELLO WORLD");
+
+    // Delta time
+    dt = millis() - dt;
+    Serial.print("QR Code Generation Time: ");
+    Serial.print(dt);
+    Serial.print("\n");
+
+    // Top quiet zone
+    Serial.print("\n\n\n\n");
+
+    for (uint8_t y = 0; y < qrcode.size; y++) {
+
+        // Left quiet zone
+        Serial.print("        ");
+
+        // Each horizontal module
+        for (uint8_t x = 0; x < qrcode.size; x++) {
+
+            // Print each module (UTF-8 \u2588 is a solid block)
+            Serial.print(qrcode_getModule(&qrcode, x, y) ? "\u2588\u2588": "  ");
+
+        }
+
+        Serial.print("\n");
+    }
+
+    // Bottom quiet zone
+    Serial.print("\n\n\n\n");
+}
+
+void loop() {
+
+}

examples/QRCode/QRCode_halfsize.ino

@@ -0,0 +1,72 @@
+/**
+ *  QRCode
+ *
+ *  A quick example of generating a QR code.
+ *
+ *  This prints the QR code to the serial monitor as solid blocks. Each character
+ *  contains two blocks, since the monospace font used in the serial monitor
+ *  is approximately twice as tall as wide.
+ *
+ */
+
+#include "qrcode.h"
+
+void setup() {
+    Serial.begin(115200);
+
+    // Start time
+    uint32_t dt = millis();
+
+    // Create the QR code
+    QRCode qrcode;
+    uint8_t qrcodeData[qrcode_getBufferSize(3)];
+    qrcode_initText(&qrcode, qrcodeData, 3, 0, "HELLO WORLD");
+
+    // Delta time
+    dt = millis() - dt;
+    Serial.print("QR Code Generation Time: ");
+    Serial.print(dt);
+    Serial.print("\n");
+
+    // Top quiet zone
+    Serial.print("\n\n\n\n");
+
+    for (uint8_t y = 0; y < qrcode.size; y += 2) {
+
+        // Left quiet zone
+        Serial.print("        ");
+
+        // Each horizontal module
+        for (uint8_t x = 0; x < qrcode.size; x++) {
+            uint8_t block = qrcode_getModule(&qrcode, x, y) << 1 | qrcode_getModule(&qrcode, x, y + 1);
+
+            switch (block)
+            {
+                case 0b00:
+                    Serial.print(" ");
+                    break;
+
+                case 0b01:
+                    Serial.print("\u2584"); // \u2584 lower block
+                    break;
+
+                case 0b10:
+                    Serial.print("\u2580"); // \u2580 upper block
+                    break;
+
+                case 0b11:
+                    Serial.print("\u2588"); // \u2588 both blocks
+                    break;
+            }
+        }
+
+        Serial.print("\n");
+    }
+
+    // Bottom quiet zone
+    Serial.print("\n\n\n\n");
+}
+
+void loop() {
+
+}