Diff: main.cpp

Revision:

0:e2b0ee19db2b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Sep 26 09:22:57 2014 +0000
@@ -0,0 +1,156 @@
+
+
+#include "mbed.h"
+#include    "IAP.h"
+#include "TextLCD.h"
+#include "stdlib.h"
+#include <stdio.h>
+
+#define     FLOAT_SIZE        4
+#define     TARGET_ADDRESS   64
+#define     NEXT_PLACE 1
+#define     PLACE   0
+
+IAP     iap;
+float getEepromFloat(int place);
+void teletype(char* text, int row);
+
+typedef char * string;
+
+// ====== Pins =========
+
+DigitalOut gLED(P1_18);
+DigitalOut rLED(P1_24);
+
+
+TextLCD lcd(P1_22, P1_14, P0_9, P0_8, P1_21, P1_2); // rs, e, d4-d7
+
+
+//Tie unused analogue pins LOW
+
+DigitalOut a1(P0_15);
+DigitalOut a2(P0_16);
+DigitalOut a3(P0_22);
+DigitalOut a4(P0_23);
+
+// ====== Variables =========
+
+float test_float = 12.5;
+float display_float = 0.0;
+
+int twodp =0;
+
+float _ON;
+float _OFF;
+
+float calib;
+float voltage;
+float displayVoltage;
+float displaySet;
+
+float difference = 0;
+float calibrate=0.0;
+
+
+
+
+// ====== CODE BEGINS=========
+
+typedef union _data {
+    float f;
+    char  s[4];
+} myData;
+
+
+float getEepromFloat(int place)
+{
+    myData returnedFloat;
+    char someBytes[4];
+
+    iap.read_eeprom( (char*)(TARGET_ADDRESS+(place*4)), someBytes, FLOAT_SIZE );
+
+    returnedFloat.s[0] = someBytes[0];
+    returnedFloat.s[1] = someBytes[1];
+    returnedFloat.s[2] = someBytes[2];
+    returnedFloat.s[3] = someBytes[3];
+    return returnedFloat.f;
+
+}
+
+void setEepromFloat(int place, float incomingFloat)
+{
+    char theBytes[4];
+    myData aFloat;
+
+    aFloat.f = incomingFloat;
+
+    theBytes[0] = aFloat.s[0];
+    theBytes[1] = aFloat.s[1];
+    theBytes[2] = aFloat.s[2];
+    theBytes[3] = aFloat.s[3];
+
+    iap.write_eeprom( theBytes, (char*) (TARGET_ADDRESS+(place*4)), FLOAT_SIZE );
+
+}
+
+
+int main()
+{
+
+    teletype("Hello", 0);
+    float aValue=0.0;
+    float theReturned=99.99;
+    
+    while (1) {
+                wait(2.0);
+                
+                aValue++;     // increment it
+                
+                setEepromFloat(PLACE,aValue);         //put it in place 0 (Global variable)
+                        
+                theReturned = getEepromFloat(PLACE); //get it back
+                
+                lcd.cls();
+                teletype("Value: %f", theReturned);  //output it to the screen
+                
+
+    };
+}
+
+
+
+
+char* left(string Source,int NewLen)
+{
+
+    char* result;
+    char* temp;
+    if (NewLen <=0)
+        NewLen =1; /* Minimum length */
+
+    result = (char*)malloc(NewLen + 1); /* +1 = DFTTZ! */
+    *result=' ';   /* default for unassigned strings */
+    temp=result;
+    if (Source && *Source) { /* don't copy an empty string */
+        while (NewLen-- >0)
+            *temp++=*Source++;
+    } else temp++;
+    *temp='\0';
+    return result;
+}
+
+void teletype(char* text, int row)
+{
+    lcd.locate(0,row);
+    lcd.printf("                ");
+
+    int whole=strlen(text);
+
+    for (int i=1; i<=whole; i++) {
+        lcd.locate(0,row);
+        lcd.printf(left(text,i));
+        wait(0.15);
+    }
+}
+
+