Revision 1:d7c915e8a270, committed 2014-09-08

Comitter:

scohennm

Date:

Mon Sep 08 19:42:06 2014 +0000

Parent:

0:e23fffd4b9a7

Commit message:

KL46Z using the loop for ramping LED PWM

Changed in this revision

diff -r e23fffd4b9a7 -r d7c915e8a270 SLCD.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SLCD.lib	Mon Sep 08 19:42:06 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/Sissors/code/SLCD/#ef2b3b7f1b01

diff -r e23fffd4b9a7 -r d7c915e8a270 main.cpp
--- a/main.cpp	Thu Aug 14 21:18:38 2014 +0000
+++ b/main.cpp	Mon Sep 08 19:42:06 2014 +0000
@@ -1,19 +1,47 @@
 #include "mbed.h"
+#include "SLCD.h"
+
 #define LEDON false
 #define LEDOFF true
+#define PWMDWELL 50 // milliseconds
+#define DFDELTA 0.01
+#define PWMTIME 1 // ms (kHxz
+#define LCDLEN 10
 
 // slightly more interesting blinky 140814 sc
+// Change to use PWM
 
-float blinks[]={0.200, 0.700};
-int ledState = LEDON;
-DigitalOut greenColor(LED_GREEN);
-DigitalOut redColor(LED_RED);
+float dutyFactor = 0.0;
+PwmOut greenColor(LED_GREEN);
+PwmOut redColor(LED_RED);
+SLCD slcd; //define LCD display
+
+void LCDMess(char *lMess){
+        slcd.Home();
+        slcd.clear();
+        slcd.printf(lMess);
+} 
 
 int main() {
+    char lcdData[LCDLEN];
+    greenColor.period_ms(PWMTIME); // set the frequency of the pulse train
+    redColor.period_ms(PWMTIME);
+    float workingDelta = DFDELTA;
+    int numSteps;
+    int i;
+    
+    numSteps = (int)(1.0/DFDELTA);
     while(true) {
-        ledState = !ledState; // Flip the general state
-        redColor = ledState;
-        greenColor = !ledState;// flip state but don't store it.
-        wait(blinks[ledState]);
+        for (i = 0; i < numSteps; i++){
+            redColor.write(dutyFactor);
+            greenColor.write(1.0 - dutyFactor);
+            dutyFactor += workingDelta;
+//        if(dutyFactor >= 1.0) workingDelta = -workingDelta;
+//        if(dutyFactor < DFDELTA) workingDelta = DFDELTA; // could be done another way
+            sprintf (lcdData,"%4.3f",dutyFactor);  
+            LCDMess(lcdData);  
+            wait_ms(PWMDWELL);
+        }
+        workingDelta = -workingDelta;
     }
 }
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