Diff: main.cpp

Revision:

0:70afbb61cc9a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Feb 18 12:45:39 2014 +0000
@@ -0,0 +1,100 @@
+
+#include "mbed.h"
+#include "LM75B.h"
+#include "C12832_lcd.h"
+
+#define  T_START 1392096720 //RTC time = Mon, 10 Feb 2014 21:32:00 PDT
+
+#define JOY_UP    p16 // joystick related pins
+#define JOY_DOWN  p13
+#define JOY_LEFT  p12
+#define JOY_RIGHT p15
+
+BusIn nibble(p12, p13, p14, p15);
+
+void upDateLCD(C12832_LCD *lcd, float mycurrentTemp, time_t *mycurrentTime)
+{
+    (*lcd).cls();
+    (*lcd).locate(0,0);
+    (*lcd).printf("Temp: %.2f\n", mycurrentTemp);
+    //(*lcd).printf("Time: %s", ctime(mycurrentTime)); // don't use this one
+    char buffer[20];  // strftime format begets .e.g. "May 19 03:10:50 PM"
+    strftime(buffer, 20, "%b %d %I:%M:%S %p\n",localtime(mycurrentTime));//note pointer
+    (*lcd).printf("%s", buffer);
+}
+
+void upDateTerminal(Serial *pc, float mycurrentTemp, time_t *mycurrentTime, int myJoyVal)
+{
+    (*pc).printf("myJoyVal = %d\n", myJoyVal);
+    (*pc).printf("Current Temp: %.2f\n", mycurrentTemp);
+    (*pc).printf("Time as seconds since January 1, 1970 = %d\n", *mycurrentTime);
+    (*pc).printf("Time as a basic string = %s", ctime(mycurrentTime));//note pointer
+    char buffer[20]; // strftime() format begets .e.g. "May 19 03:10:50 PM"
+    strftime(buffer, 20, "%b %d %I:%M:%S %p\n", localtime(mycurrentTime));//note pointer
+    (*pc).printf("Time as a custom formatted string = %s\n", buffer);
+}
+
+void getMyTempnTime(LM75B *mytmpSns, float *mycurrentTemp, time_t *mycurrentTime)
+{
+    *mycurrentTemp = (((*mytmpSns).read()*9/5)+32);
+    *mycurrentTime = time(NULL);
+}
+
+
+void readJoyStick(BusIn *myJoyStick, int *myJoyVal)
+{
+    int sampleJoyVal = *myJoyStick;
+    wait(.04);
+    if (sampleJoyVal != *myJoyStick) // if not stable, clear sample
+    {
+        *myJoyVal = 0;
+    }
+    else
+    {
+        switch (sampleJoyVal) //disallow "diagonal" combinations
+        {
+            case 0x1: // JOY_RIGHT
+            case 0x2: // JOY_LEFT
+            case 0x4: // JOY_DOWN
+            case 0x8: // JOY_UP
+                (*myJoyVal) = sampleJoyVal; 
+                break;
+            default:  (*myJoyVal) = 0; // JOY_IDLE
+                break;
+        }
+    }
+}
+
+/*******************************************************************
+* EXPERIMENT_F_CALL.CPP
+* Date: 2/17/2014  Author: George (Michael) Hey
+* MBED Program to read time and temperature periodically (~ every second)
+* and also to read the joystick, debounced.
+* Displays to the LCD screen temperature and time.
+* Displays to the PC terminal the joystick value, temperature and time.
+* Reference http://mbed.org/handbook/Time?action=view&revision=11592
+* http://mbed.org/users/petereiso/notebook/cc-time-functions/
+* This program puts all the peripherals inside main(), and passes
+* peripheral pointers to functions().
+*******************************************************************/
+int main()
+{
+    C12832_LCD lcd;
+    LM75B tmpSns(p28,p27);
+    Serial pc(USBTX, USBRX); // tx, rx
+    float currentTemp = 0;
+    time_t currentTime = T_START;  // see #define
+    BusIn joyStick(JOY_UP,JOY_DOWN,JOY_LEFT,JOY_RIGHT);
+    int joyVal = 28; // bogus value for debug
+
+    set_time(T_START); //  RTC start time - see #define
+    while (1) {
+        time_t seconds = time(NULL);
+        getMyTempnTime(&tmpSns, &currentTemp, &currentTime);
+        readJoyStick(&joyStick, &joyVal);
+        upDateLCD(&lcd, currentTemp, &currentTime);
+        upDateTerminal(&pc, currentTemp, &currentTime, joyVal);
+        wait(1.0);
+    }
+    return 0;
+}