initial commit

1-Demo/Demo_Arduino/3_2_Uart/3_2_uart.ino

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+/*
+   Serial
+   串口通讯实验
+*/
+int incomedate = 0;
+void setup() {
+
+  Serial.begin(115200); //设置串口波特率115200
+
+  Serial.println(78, BIN);// "1001110"
+  Serial.println(78, OCT);// "116"
+  Serial.println(78, DEC);// "78"
+  Serial.println(78, HEX);// "4E"
+  Serial.println(1.23456, 0);// "1"
+  Serial.println(1.23456, 2);// "1.23"
+  Serial.println(1.23456, 4);// "1.2346"
+  Serial.println('N');// "N"
+  Serial.println("Hello world.");// "Hello world."
+}
+void loop() {
+
+  if (Serial.available() > 0)//串口接收到数据
+  {
+    incomedate = Serial.read();//获取串口接收到的数据
+    if (incomedate == 'H')
+    {
+      Serial.println("I am OK!");
+    }
+  }
+  delay(1000);
+}