Diff: main.cpp

Revision:

0:1ab681bd453e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Jan 05 00:58:09 2014 +0000
@@ -0,0 +1,126 @@
+/* A port test of the arduino voltmeter example using the 
+4.3' PCT 4d systems touch screen display.  
+
+uses the mbed_genie library ported from the arduino
+visie-genie library by Christian B
+
+The display serial TX and RX pins are connected to pin 9
+and pin 10 of the mbed
+
+The reset pin is not connected as reset function is not implemented
+
+Pin 15 of the mbed has a potentiometer wiper connected to it
+The other connections of the potentiometer are connected to +3.3V
+and 0V 
+
+For setting up the display in Visie-Genie
+
+The display has an angular meter objecr, a LED digits object, two buttons 
+and three static text objects.
+
+The program sends digital voltage readings to the LED digits and 
+angular meter of the display module.
+
+The On and Off button has been set to report on change
+
+The baud rate of the display is set to 115200 baud
+
+*/
+
+#include "mbed.h"
+#include "mbed_genie.h"
+
+DigitalOut myled(LED1);   //LED 1 for indication
+
+AnalogIn voltReading(p15);  //Potentiometer wiper connected to pin 15      
+
+int flag = 0;        //holds the "power status" of the voltmeter. flag = 0 means voltmeter is "off", flag = 1 means the voltmeter is "on".
+float voltMeter;       //holds the digital voltage value to be sent to the angular meter
+float voltLED;         //holds the digital voltage value to be sent to the LED digits
+
+//Event handler for the 4d Systems display
+void myGenieEventHandler(void) 
+{
+  genieFrame Event;
+  genieDequeueEvent(&Event);
+  //event report from an object
+  if(Event.reportObject.cmd == GENIE_REPORT_EVENT)
+  {
+    /*
+    for example here we check if we received a message from 4dbuttons objects
+    the index is the button number, refer to the 4dgenie project to know the index
+    */
+    if (Event.reportObject.object == GENIE_OBJ_4DBUTTON)                // If the Reported Message was from a button
+    {
+        if (Event.reportObject.index == 0) 
+        {
+             //printf("Off Button pressed!\n\r");
+             wait(0.2);
+             flag=1;
+        }
+        if (Event.reportObject.index == 1) 
+        {
+             //printf("On Button pressed!\n\r");
+             wait(0.2);
+             flag=0;           
+        }
+    }
+  }
+  
+  //Cmd from a reported object (happens when an object read is requested)
+  // if(Event.reportObject.cmd == GENIE_REPORT_OBJ)
+  // {
+ 
+  // }
+
+}
+ 
+int main() 
+
+{ 
+    SetupGenie();
+    genieAttachEventHandler(&myGenieEventHandler);
+    //genieResetDisplay();
+ 
+    printf("Langsters's mbed Visi-Genie Voltmeter demo \n\r");
+ 
+    genieWriteContrast(15); //set screen contrast to full brightness
+ 
+            while(1) 
+            {   
+                //voltLED = 0;
+                
+                if (flag == 1)
+                    {
+                        //printf("Flag status: %d \r\n", flag);
+                        wait (0.1); 
+                        voltLED = voltReading; 
+                        wait (0.1);    
+                        //printf("Volt bit Reading: %f \n\r",voltLED);
+                        voltLED = voltLED * 3.3;                                    //convert float reading to voltage
+                        //printf("voltLED: %f\r\n",voltLED);
+                
+                        voltLED = voltLED * 1000;
+                        genieWriteObject(GENIE_OBJ_LED_DIGITS, 0x00, voltLED);      //write to Leddigits0 the value of voltLED 
+                        wait (0.1);
+                        
+                        voltMeter = voltLED/100;
+                        genieWriteObject(GENIE_OBJ_ANGULAR_METER, 0x00, voltMeter); //write to Angularmeter0 the value of voltMeter     
+                    }
+                
+                else if(flag == 0)
+                    
+                    {
+                        //printf("Flag status: %d \r\n", flag); 
+                        wait (0.1);
+                        voltLED = 0;
+                        genieWriteObject(GENIE_OBJ_LED_DIGITS, 0x00, 0);      //write to Leddigits0 the value of voltLED 
+                        wait (0.1);
+                        
+                        //voltMeter = voltLED/100;
+                        genieWriteObject(GENIE_OBJ_ANGULAR_METER, 0x00, 0); //write to Angularmeter0 the value of voltMeter   
+                    }                            
+                                
+            }
+      
+}        
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