Diff: main.cpp

Revision:

0:fb6ea61c315b

Child:

1:d82569d51964

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Nov 06 16:54:17 2016 +0000
@@ -0,0 +1,91 @@
+#include "mbed.h"
+#include "TSISensor.h"
+#include "SLCD.h"
+#define TSILIMIT     0.99
+#define LCDCHARLEN   10
+#define DATAINTERVAL 0.5
+#define PROGNAME     "kl46z_recursive_count\n\r"
+#define BUTTONTIME 0.2
+#define LCDTITLE "rCNT"
+#define TITLEWAIT 2.0
+#define NUMBUTS 2
+#define LBUT PTC12  // port addresses for buttons
+#define RBUT PTC3
+
+DigitalOut gpo(D0);
+DigitalOut led0(LED_RED);
+SLCD slcd;
+Serial pc(USBTX, USBRX);
+PwmOut gled(LED_GREEN);
+PwmOut rled(LED_RED);
+TSISensor tsi;
+Timer ButtonTimer;
+DigitalIn buttons[NUMBUTS] = {LBUT, RBUT};
+
+char lcdData[LCDCHARLEN];
+float tsidata = 0.0;
+int count_num = 0;
+int count_min = 0;
+
+void LCDMess(char *lMess){
+        slcd.Home();
+        slcd.clear();
+        slcd.printf(lMess);
+}
+
+void initialize_global_vars()
+{
+    pc.printf(PROGNAME);
+    // set up DAQ timer
+    // set up DAQ timers
+    ButtonTimer.start();
+    ButtonTimer.reset();
+}
+
+void showTitle()
+{
+    LCDMess(LCDTITLE);
+    wait(TITLEWAIT);
+    return;
+}
+
+void count_backwards(int cnt, int min){
+    gled = !gled;
+    pc.printf("\tT-%d\n\r", cnt);
+    sprintf (lcdData,"tz%d",cnt);  
+    LCDMess(lcdData);  
+    wait(DATAINTERVAL);
+    // tail recursion to correct the direction of counting
+    if(cnt > min){ 
+        count_backwards(cnt-1,min);
+    }
+}
+
+int main()
+{
+    initialize_global_vars();
+    showTitle();
+    pc.printf(PROGNAME);
+    while (true) {
+        rled = !rled;
+        tsidata = tsi.readPercentage();
+        count_num = floor(tsidata*51);
+        if(count_num > 2){
+            pc.printf("\n Count down from: %d\n\r", count_num);
+            sprintf (lcdData,"%d",count_num);  
+            LCDMess(lcdData);  
+        }
+        wait(DATAINTERVAL);
+        if (ButtonTimer > BUTTONTIME) {
+            if(!buttons[0]){
+                count_backwards(count_num, count_min);
+                showTitle();
+            }
+            if(!buttons[1]){
+                count_num = 0;
+                showTitle();
+            }
+        }
+        ButtonTimer.reset();
+    }
+}
\ No newline at end of file