Diff: main.cpp

Revision:

0:11f1739fb2ad

diff -r 000000000000 -r 11f1739fb2ad main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jun 27 20:40:36 2017 +0000
@@ -0,0 +1,98 @@
+#include "mbed.h"
+
+DigitalOut led1(LED1);
+InterruptIn sw(SW2);  //Use SW1 on some platforms
+Timer timer;
+
+uint8_t recording = 0;  //indicates whether recording a new pattern or not
+uint32_t blinkTiming[20] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};  //to store pattern - series of milisecond time delays
+uint8_t blinkCount = 0;  //starts at 0 for first knock
+uint32_t startTime;  //timer time in miliseconds
+
+//interrupt routine that is called when button is pressed
+void fall_handler(void) {
+
+    //if not recording yet
+    if(recording ==0)
+      {
+        //this is the first button press
+        blinkCount = 0;
+        led1 = 1; //turn off led
+        //clear the array that stores the pattern
+        for(uint8_t i = 0; i<20; i++)
+        {
+          blinkTiming[i] = 0;
+        }
+        //set state to recording
+        recording = 1;
+        //start timer
+        timer.start();
+        timer.reset();
+        startTime = timer.read_ms();
+
+      //if already recording
+      }else if(recording == 1)
+      {
+        //this is not the first button press
+        uint32_t now;
+        //check the time verses the start time and save it
+        now = timer.read_ms();
+        blinkTiming[blinkCount] = (now - startTime);
+        //add to the number of button presses captured - same as number of blinks that will come later
+        blinkCount++;
+        startTime = now;  //start time for next period
+      }
+
+}
+
+// main() runs in its own thread in the OS
+int main() {
+
+  //set state to not recording
+  recording = 0;
+  //set interrupt callback for when the button is pressed
+  sw.fall(fall_handler);
+
+
+  while(1)
+  {
+      //if state is recording
+      if(recording==1)
+      {
+          //check if the max button presses (and thus blinks) has been reached, or time period has expired
+          if (blinkCount >= 20 || timer.read_ms() > 5000)  //max presses reached or 5 sec elapsed - done recording
+          {
+            timer.stop();
+            /* re-initialize all variables */
+            recording = 0;
+            blinkCount = 0;
+
+          }
+      //if state not recording
+      }else if(recording == 0)
+      {
+          while(recording == 0)
+          {
+            //blink out the pattern
+            for(uint8_t i = 0;i < 20; i++)
+            {
+              //blink led
+              led1 = 0;
+              wait_ms(10);
+              led1 = 1;
+              //wait for specified delay that was captured
+              wait_ms(blinkTiming[i]);
+              //check if the delay is zero, if so its the last one so stop.
+              if(blinkTiming[i] == 0){
+                break;
+              }
+
+            }
+            //take a break for a few seconds, then loop back and repeat the pattern again
+            wait_ms(2000);
+          }  //end of while(recording == 0)
+      } //end of if(recording == 0)
+
+  }  //end of while(1) infinite loop
+
+}  //end of main