Diff: main.cpp

Revision:

1:c452326c2800

Parent:

0:04499bc54bee

--- a/main.cpp	Fri Sep 09 17:51:13 2016 +0000
+++ b/main.cpp	Wed Sep 21 17:57:26 2016 +0000
@@ -1,15 +1,79 @@
 #include "mbed.h"
+#include <math.h>  
 #include "TSISensor.h"
 #include "SLCD.h"
+#define LBUT PTC12  // port addresses for buttons
+#define RBUT PTC3
 #define TSILIMIT 0.99
+#define PRINTDELTA 0.01
 #define LCDCHARLEN 10
 #define DATAINTERVAL 0.1
-#define PROGNAME "kl46z_slider_test_v1\n\r"
+#define BUTTONTIME 0.3
+#define LCDTIME 0.250
+#define NUMMESS 2
+#define NUMBUTS 2
+#define FLOATDISP 0
+#define UINTDISP 1
+#define BITS16 65536
+#define SHIFT2NUMERALS 100 // divide for right shift -  modul
+#define RETAIN3NUMERALS 1000 // modulo (%) 1000
+
+
+#define LIGHTSENSORPORT PTE22
+#define PROGNAME "kl46z_slider_lightsense\n\r"
 
 SLCD slcd; //define LCD display
 Serial pc(USBTX, USBRX);
 
-float tsidata;
+// define I/O
+PwmOut gled(LED_GREEN);
+PwmOut rled(LED_RED);
+TSISensor tsi;
+
+DigitalIn buttons[NUMBUTS] = {RBUT, LBUT};
+AnalogIn LightSensor(LIGHTSENSORPORT);
+Timer ButtonTimer; // for reading button states
+Timer LCDTimer;
+Timer dataTimer;
+
+// definie an enum for illustration purposes
+    enum shiftstate_t {right, none, left};
+
+int displayState = FLOATDISP;
+
+unsigned int leftrigntStateMachine( shiftstate_t sState, unsigned int usenseData ){
+    unsigned int dataReturn;
+    
+    // data shifter state machine
+    
+    switch(sState) { 
+        case none: {
+                dataReturn = usenseData;
+                break;
+                }
+        case right: {
+                dataReturn = usenseData / SHIFT2NUMERALS;
+                break;
+                }
+        case left: {
+                dataReturn = usenseData % RETAIN3NUMERALS;
+                break;
+                }
+    } // end switch shiftstate 
+    return (dataReturn);
+}
+
+void initialize_global_vars(){
+    pc.printf(PROGNAME);
+    // set up DAQ timer
+    ButtonTimer.start();
+    ButtonTimer.reset();
+    dataTimer.start();
+    dataTimer.reset(); 
+    LCDTimer.start();
+    LCDTimer.reset(); 
+     
+} 
 
 void LCDMess(char *lMess){
         slcd.Home();
@@ -18,24 +82,80 @@
 }
 
 int main(void) {
+    int i;
+    unsigned int dataRemainder;
+
     char lcdData[LCDCHARLEN];
-    PwmOut gled(LED_GREEN);
-    PwmOut rled(LED_RED);
-    pc.printf(PROGNAME);
-    TSISensor tsi;
+    float tempTouch;
+    float lastTouch = 0.0;
+    float tsidata = 0.0;
+    float lightData;
+    unsigned int ulightData;
+    float shiftResult;
+    
+    shiftstate_t shiftstate = none;
+
+    
+    
+    initialize_global_vars();
 
      while (true) {
-        tsidata = tsi.readPercentage();
-        if (tsidata > TSILIMIT){
-            gled = 0.0;
-            rled = 0.0;
-        }else {
-            pc.printf("\n Position %f\n\r", tsidata);
-            sprintf (lcdData,"%0.4f",tsidata);  
-            LCDMess(lcdData);  
-            gled = tsidata;
-            rled = 1.0 - tsidata;
+        // read buttons
+        if (ButtonTimer.read() > BUTTONTIME){
+            for (i=0; i<NUMBUTS; i++){ // index will be 0 or 1 
+                if(!buttons[i]) { 
+                    displayState = i;
+                } // if ! buttons
+            }// for loop to look at buttons
+            ButtonTimer.reset();
         }
-            wait(DATAINTERVAL);
-    }
+        
+        // Read touch sensor
+        if(dataTimer.read() > DATAINTERVAL){
+            tempTouch = tsi.readPercentage();
+            dataTimer.reset();  
+            shiftResult = tempTouch -lastTouch;
+            if (tempTouch > TSILIMIT){
+                gled.write(0.0);// turn them off
+                rled.write(0.0);
+            }else {
+                if (fabs(shiftResult) < PRINTDELTA) {
+                    shiftstate = none; 
+                    
+                } else if (shiftResult < 0.0 ) {
+                        shiftstate = left;
+                      
+                } else {
+                        shiftstate = right;                   
+                }
+                /*
+                if (fabs(shiftResult)> PRINTDELTA){                
+                    pc.printf("Position %0.4f\n\r", tsidata);
+                }
+                */
+                tsidata= tempTouch;
+                gled.write(tsidata);
+                rled.write(1.0 - tsidata);
+                lastTouch=tsidata;
+            }  
+        }
+        if(LCDTimer.read() > LCDTIME){
+            LCDTimer.reset();                               
+            switch (displayState){
+                case FLOATDISP: {
+                    lightData = (1.0 - LightSensor.read()); // show as increasiing with increasing intensity  
+                    sprintf(lcdData,"%4.3f",lightData); 
+                    break;
+                }
+                case UINTDISP: {
+                    ulightData = BITS16 - LightSensor. read_u16();  
+                    dataRemainder = leftrigntStateMachine( shiftstate, ulightData);
+                    sprintf(lcdData,"%4d",dataRemainder); 
+                    break;
+                }// end switch displaystate
+            }                 
+            LCDMess(lcdData); 
+        } // end LCD timer.read
+            
+    }// end while(true)
 }
\ No newline at end of file