Revision 1:c0cfd1b0f4ef, committed 2014-09-17

Comitter:

wernert

Date:

Wed Sep 17 09:29:41 2014 +0000

Parent:

0:346c8150ca74

Commit message:

Update to disable pull-up that were causing extra current to be drawn.

Changed in this revision

--- a/main.cpp	Sat Sep 06 09:30:35 2014 +0000
+++ b/main.cpp	Wed Sep 17 09:29:41 2014 +0000
@@ -1,5 +1,9 @@
 #include "mbed.h"
 #include "WakeUp.h"
+#include <stdlib.h>
+
+
+DigitalIn progMode(P0_3);
 
 DigitalOut LED[] = {(P0_7), (P0_8), (P0_2), (P0_20), (P1_19), (P0_17), (P0_23)};// declare 7 LEDs
 
@@ -10,21 +14,30 @@
     __WFI();
 }
 
+
 int main() {
 
     int i = 0;
     
+    
+    
+    // Unconfigured GPIO pins default to having the internal pullups enabled. 
+    // The board has a pull down on pin P0_3. This conflict was causing the extra power draw in sleep mode.
+    // Therefor we disable internal pull-ups to ensure low current mode
+    progMode.mode(PullNone);
+
+    
     //The low-power oscillator can be quite inaccurate on some targets
     //this function calibrates it against the main clock
     WakeUp::calibrate();
     while(1)
     {  
         LED[i] = 1; // turn on
-        wait(.01);   // delay
+        wait(.05);   // delay
         LED[i] = 0; // turn off
         
          //Set wakeup time for second
-        WakeUp::set_ms(1000);
+        WakeUp::set_ms(5000);
         //Enter deepsleep, the program won't go beyond this point until it is woken up
         myDeepSleep();
         i++;