Revision 1:51f8c2b04ce2, committed 2014-09-05

Comitter:

scohennm

Date:

Fri Sep 05 02:26:47 2014 +0000

Parent:

0:e23fffd4b9a7

Child:

2:c016448d89b2

Commit message:

Use of KL46z PWM LCD and LED's for NMHU 140904

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SLCD.lib	Fri Sep 05 02:26:47 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/Sissors/code/SLCD/#ef2b3b7f1b01

--- a/main.cpp	Thu Aug 14 21:18:38 2014 +0000
+++ b/main.cpp	Fri Sep 05 02:26:47 2014 +0000
@@ -1,19 +1,61 @@
 #include "mbed.h"
+#include "SLCD.h"
+
+// An example of C++ abuse 140904 sc
+//#define PRINTDEBUG
+#define PROGNAME "blink_kl46z_states v1\n\r"
 #define LEDON false
 #define LEDOFF true
-
-// slightly more interesting blinky 140814 sc
+#define PWMDWELL 50 // milliseconds
+#define DFDELTA 0.01
+#define PWMTIME 1 // ms (kHz
+#define LCDLEN 10
+#define RMPUP true
+#define RMPDWN false
+#define NUMSTATES 2
 
-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
+float rampDirection[NUMSTATES] = {-DFDELTA, DFDELTA};
+
+Serial pc(USBTX, USBRX);
+
+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);
+    int rampstate = RMPUP;
+    int numSteps;
+    float workingDelta;
+    int i=0;
+    
+    pc.printf(PROGNAME);
+    
+    workingDelta = rampDirection[rampstate];
+    numSteps = (int)(1.0/workingDelta);
     while(true) {
-        ledState = !ledState; // Flip the general state
-        redColor = ledState;
-        greenColor = !ledState;// flip state but don't store it.
-        wait(blinks[ledState]);
+        i++;      
+        redColor.write(dutyFactor);
+        greenColor.write(1.0 - dutyFactor);
+        dutyFactor += workingDelta;
+        sprintf (lcdData,"%4.3f",dutyFactor);  
+        LCDMess(lcdData);
+#ifdef PRINTDEBUG
+        pc.printf("i= %d dutyfactor = %5.4f workingDelta %5.4f \n\r",  i, dutyFactor, workingDelta); 
+#endif
+        if (!(i % numSteps)){
+            i=0;
+            rampstate = !rampstate;
+            workingDelta = rampDirection[rampstate];
+        }
+        wait_ms(PWMDWELL); 
     }
 }
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