Diff: main.cpp

Revision:

0:0d08d0b3c7ed

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jan 13 12:46:12 2015 +0000
@@ -0,0 +1,103 @@
+// For Arch and Xadow M0, use on-board button for normal input function rather than reset function
+// single click - LED1 on
+// double click - LED2 on
+// long click - LED1 and LED2 on, and then the board will restart
+//
+// Note: To enter ISP mode, press the button and then power on (power-on reset)
+
+#include "mbed.h"
+#include "pinmap.h"
+
+#define BUTTON_DOWN  0
+
+InterruptIn button(P0_1);       // on-board button of Arch or Xadow M0
+BusOut leds(LED1, LED2);
+
+uint8_t button_down_event = 0;
+
+void button_callback()
+{
+    button_down_event = 1;      // set button down event flag
+}
+
+int button_detect()
+{
+    int t = 0;
+    
+    while (1) {
+        if (button.read() != BUTTON_DOWN) {
+            if (t < 30) {
+                return 0;     // for anti shake
+            } else {
+                break;
+            }
+        }
+        
+        if (t > 3000) {        // More than 3 seconds
+            return -1;          // long click
+        }
+        
+        t++;
+        wait_ms(1);
+    }
+    
+    if (t > 4000) {             // More than 0.4 seconds
+        return 1;               // single click
+    }
+    
+    while (true) {
+        if (button.read() == BUTTON_DOWN) {
+            wait_ms(1);
+            if (button.read() == BUTTON_DOWN) {
+                return 2;      // double click
+            }
+            
+            t += 10;
+        }
+        
+        if (t > 400) {
+            return 1;          // The interval of double click supposes to be less than 0.4 seconds, so it's single click
+        }
+        
+        t++;
+        wait_ms(1);
+    }
+}
+
+
+int main() {
+    // start 
+    leds = 1;
+    wait(0.2);
+    leds = 3;
+    wait(0.2);
+    leds = 2;
+    wait(0.2);
+    leds = 0;
+    
+    pin_function(P0_0, 1);      // use RESET pin as 
+    button.fall(button_callback);
+    
+    while(1) {
+        if (button_down_event != 0) {
+            int clicks = button_detect();
+            if (clicks == 1) {
+                leds = 0x01;
+            } else if (clicks == 2) {
+                leds = 0x02;
+            } else if (clicks == -1) {  // long press
+                leds = 0x03;
+                while (button.read() == BUTTON_DOWN) { } // wait until button is released. note: remove this line to boot into ISP mode after reset
+                NVIC_SystemReset();                      // reset
+            }
+            
+            wait(1);
+            leds = 0;
+            
+            button_down_event = 0;      // clear button down event flag
+        }
+        
+        // sleep();
+        // or do something else
+    }
+}