Diff: main.cpp

Revision:

4:b5ca7f122564

Parent:

3:a7b520fad123

--- a/main.cpp	Fri Sep 22 07:49:45 2017 +0000
+++ b/main.cpp	Tue Sep 26 01:17:42 2017 +0000
@@ -1,20 +1,41 @@
 #include "mbed.h"
 
-DigitalOut led_blink(LED1);
-PwmOut led_pwm(LED1);
+//------------------------------------
+// Hyperterminal configuration
+// 115200 bauds, 8-bit data, no parity
+//------------------------------------
 
-int main()
+Serial pc(SERIAL_TX, SERIAL_RX, 115200);
+DigitalOut led_red((PinName)LED_RED, (int)0);//高电平点亮,低电平熄灭
+DigitalIn user_button((PinName)USER_BUTTON, (PinMode)PullUp);
+AnalogIn analog_value(A0);
+PwmOut mypwm(PWM_OUT);
+
+Ticker read_analog_ticker;
+
+void read_analog_value()
 {
-    led_blink = 1; // LED is ON
-    wait(0.2); // 200 ms
-    led_blink = 0; // LED is OFF
-    wait(0.8); // 800 ms
+    float meas = analog_value.read(); // Converts and read the analog input value (value from 0.0 to 1.0)
+    meas = meas * 3300; // Change the value to be in the 0 to 3300 range
+    pc.printf("measure = %.0f mV\r\n", meas);
+}
+
+int main(void)
+{
+    pc.printf("\nAnalogIn example\r\n");
+
+    mypwm.period_ms(10);
+    mypwm.pulsewidth_ms(1);
+    printf("pwm set to %.2f %%\n", mypwm.read() * 100);
+
+    // Init the ticker with the address of the function (toggle_led) to be attached and the interval (100 ms)
+    read_analog_ticker.attach(&read_analog_value, 1);
 
     while (1) {
-        led_pwm = led_pwm + 0.01;
-        wait(0.2);
-        if (led_pwm == 1.0) {
-            led_pwm = 0;
-        }
+        if (0  == user_button) {
+            led_red.write(1);
+        } else
+            led_red.write(0);
+        wait(0.1); // 100 ms
     }
 }