Stanley Cohen / Mbed 2 deprecated lightsense_kl46z_PWM__lux

kl46z, lux calc

Dependencies:   SLCD mbed

Fork of lightsense_kl46z_PWM_simple by Stanley Cohen

Files at this revision

API Documentation at this revision

Revision 9:96ddab3435d2, committed 2017-02-06

Comitter:
scohennm
Date:
Mon Feb 06 18:59:14 2017 +0000
Parent:
8:ea818c9220fc
Commit message:
measure luc

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r ea818c9220fc -r 96ddab3435d2 main.cpp
--- a/main.cpp	Mon Jan 25 16:10:38 2016 +0000
+++ b/main.cpp	Mon Feb 06 18:59:14 2017 +0000
@@ -6,6 +6,9 @@
 #define DATATIME 400 // milliseconds
 #define LCDLEN 10
 #define LIGHTSENSORPORT PTE22
+#define LUXSCALING 1650 // full scale lux 500 lux/volt
+#define LIMTMESSAGE "OVER"
+#define FULLSCALE  1000.0
 
 
 
@@ -24,6 +27,7 @@
     PwmOut redColor(LED_RED);
     AnalogIn LightSensor(LIGHTSENSORPORT);
     float lightData; 
+    float luxData;
     char lcdData[LCDLEN];
    
     int timeToChangeDF = DATATIME;
@@ -35,12 +39,18 @@
     
     while(true) {    
         if (LEDTimer.read_ms() > timeToChangeDF){ // check for timer time out transtion
+            // start out assuming over 1000 lux
+            sprintf(lcdData,"%s",LIMTMESSAGE);
             lightData = (1.0 - LightSensor.read()); // show as increasiing with increasing intensity
+            luxData = lightData * LUXSCALING;
+            
             greenColor.write(1.0- lightData);
             redColor.write(1.0-lightData);
-            sprintf(lcdData,"%4.3f",lightData);
+            if( luxData < FULLSCALE){
+                sprintf(lcdData,"%4.0f",luxData);
+            }    
             LCDMess(lcdData);  
-            pc.printf("%4.3f\r\n",lightData);
+            pc.printf("%4.3f" "%4.0f\r\n",lightData,luxData);
             timeToChangeDF = DATATIME;
             LEDTimer.reset();
         }