Revision 3:68e974f5f532, committed 2015-07-15

Comitter:

falingtrea

Date:

Wed Jul 15 14:20:33 2015 +0000

Parent:

2:75adc72aa6a0

Child:

4:51d7c24bbf91

Commit message:

Added threads for push button switch debounce.

Changed in this revision

--- a/main.cpp	Thu Jul 09 20:32:03 2015 +0000
+++ b/main.cpp	Wed Jul 15 14:20:33 2015 +0000
@@ -2,7 +2,7 @@
  * @file    main.cpp
  * @brief   Main application for mDot-EVB demo
  * @author  Tim Barr  MultiTech Systems Inc.
- * @version 1.02
+ * @version 1.03
  * @see
  *
  * Copyright (c) 2015
@@ -21,10 +21,13 @@
  *
  * 1.01 TAB 7/6/15 Removed NULL pointer from evbAmbientLight creation call.
  *
- * 1.02 TAB 7/9/15 Send logo to LCD before attempting connection to LoRa network. Added
+ * 1.02 TAB 7/8/15 Send logo to LCD before attempting connection to LoRa network. Added
  *					information on setting up for public LoRa network. Moved SW setup to
  *					beginning of main. Removed printf call from ISR functions. Added
  *					additional checks for exit_program.
+ *
+ * 1.03 TAB 7/15/15 Added threads for push button switch debounce.
+ *
  */
 
 #include "mbed.h"
@@ -130,15 +133,20 @@
 convert32 convertl;
 convert16 converts;
 
+// flags for pushbutton debounce code
+bool pb1_low = false;
+bool pb2_low = false;
+
 void pb1ISR(void);
 void pb2ISR(void);
+void pb1_debounce(void const *args);
+void pb2_debounce(void const *args);
+Thread* thread_3;
 
 void log_error(mDot* dot, const char* msg, int32_t retval);
 
 void config_pkt_xmit (void const *args);
 
-Thread* thread1;
-
 int main()
 {
 
@@ -149,7 +157,10 @@
     debugUART.baud(921600);
 //  mDotUART.baud(9600);    // mdot UART unused but available on external connector
 
-    thread1 = new Thread(config_pkt_xmit);				// start thread that sends LoRa packet when SW2 pressed
+    Thread thread_1(pb1_debounce);						// threads for de-bouncing pushbutton switches
+    Thread thread_2(pb2_debounce);
+
+    thread_3 = new Thread(config_pkt_xmit);				// start thread that sends LoRa packet when SW2 pressed
 
     evbAccel = new MMA845x(mDoti2c,MMA845x::SA0_VSS); 	// setup Accelerometer
     evbBaro = new MPL3115A2(mDoti2c);					// setup Barometric sensor
@@ -530,28 +541,78 @@
 }
 
 /*
- * Ends program when button 1 pushed
+ * Sets pb1_low flag. Slag is cleared in pb1_debounce thread
  */
 void pb1ISR(void)
 {
+	if (!pb1_low)
+		pb1_low = true;
+}
 
-    exit_program = true;
+/*
+ * Debounces pb1. Also exits program if pushbutton 1 is pressed
+ */
+void pb1_debounce(void const *args)
+{
+
+    static uint8_t count = 0;
+
+    while (true) {
+
+        if (pb1_low && (mDot08 == 0))
+			count++;
+        else {
+        	count = 0;
+        	pb1_low = false;
+        }
+        
+		if (count == 5) 
+			exit_program = true;
+		
+        Thread::wait(5);
+    }
 }
 
 /*
- * changes packet transmit time to every other, every fifth, or every tenth sample when SW2 pushed
- * Also triggers a thread to transmit a configuration packet
+ * Sets pb2_low flag. Flag is cleared in pb2_debounce thread
  */
 void pb2ISR(void)
 {
+	if (!pb2_low)
+		pb2_low = true;
+}
 
-    if (pckt_time >= 5)
-        pckt_time /= 2;
-    else pckt_time = 20;
+/*
+ * Debounces pb2. Also changes packet transmit time to every other,
+ * every fifth, or every tenth sample when SW2 pushed
+ * Also triggers a thread to transmit a configuration packet
+ */
+void pb2_debounce(void const *args)
+{
+
+    static uint8_t count = 0;
+
+    while (true) {
 
-    thread1->signal_set(0x10);		// signal config_pkt_xmit to send packet
+        if (pb2_low && (mDot09 == 0))
+			count++;
+        else {
+        	count = 0;
+        	pb2_low = false;
+        }
+        
+		if (count == 5){
 
-}
+			if (pckt_time >= 5)
+				pckt_time /= 2;
+			else pckt_time = 20;
+
+			thread_3->signal_set(0x10);		// signal config_pkt_xmit to send packet
+		}
+		
+        Thread::wait(5);
+ 	}
+ }
 
 /*
  *  Function that print clear text verion of mDot errors