Revision 8:1b64fa37f082, committed 2014-03-27

Comitter:

bhakti08

Date:

Thu Mar 27 18:11:50 2014 +0000

Parent:

7:f740e1a3890f

Commit message:

Modified to add comments

Changed in this revision

--- a/main.cpp	Thu Mar 27 17:33:50 2014 +0000
+++ b/main.cpp	Thu Mar 27 18:11:50 2014 +0000
@@ -1,16 +1,26 @@
+/*****************************************************************************/
+/*                                   USB MOUSE HOST                          */
+/*Function: This program is used to connect the MBED USB mouse. The bubble   */
+/*          on the LCD moves according to the input from the USB device.     */
+/*          The program for the MBED USB Device can be found at following    */
+/*          location:                                                        */
+/*          <http://mbed.org/users/bhakti08/code/USB_Project_Device/>        */
+/*Author:   Bhakti Kulkarni                                                  */
+/*Date:     03/27/2014                                                       */
+/*****************************************************************************/
+
 #include "mbed.h"
 #include "USBHostMouse.h"
 #include "C12832_lcd.h"
 #include "DebouncedInterrupt.h"
 #include "DebouncedIn.h"
-//#define INTERRUPT
 
-DebouncedIn report(p14);
-DigitalOut led(LED1);
+DigitalOut connect(LED1);     //LED to indicate USB Mouse connected
 C12832_LCD lcd;
 Serial pc(USBTX,USBRX);
-BusOut button (LED2,LED3,LED4);
+BusOut button (LED2,LED3,LED4);   //LEDs for the Button pressed on Device
 
+/*Global Variables to process the X abd Y values*/
 int x_lcd=0,y_lcd=0;
 int Xpos=0,Ypos=0;
 uint8_t buttons; 
@@ -18,16 +28,29 @@
 int8_t y; 
 int8_t z;
 
+/*****************************************************************************/
+/*Function: OnMouseEvent()                                                   */
+/*          This function is called whenever there is change in mouse data   */
+/*          It copies the values of x,y and buttons from the device into     */
+/*          variables that can be accessed by the main logic to move the     */
+/*          bubble on the LCD                                                */
+/*Inputs:   The x,y and button values from the Mouse.                        */
+/*Outputs:  None.                                                            */
+/*****************************************************************************/
 void onMouseEvent(uint8_t buttons, int8_t x, int8_t y, int8_t z) {
-    if(!report)
-        lcd.cls();
-    //lcd.locate(0,0);
     pc.printf("Mouse values: x= %d, y= %d\r\n",x,y);
     Xpos = x;
     Ypos = y;
     button = buttons;
 }
+/*****************************************************************************/
 
+/*****************************************************************************/
+/*This thread is the mouse_task thread which will check for the USB Device   */
+/*connectivity. If the device is not connected it will issue an error message*/
+/*Once the device is connected, this thread will attach the mouse event      */
+/*thread.                                                                    */
+/*****************************************************************************/
 void mouse_task(void const *) {
     
     USBHostMouse mouse;
@@ -35,8 +58,12 @@
     while(1) {
         
         // try to connect a USB mouse
-        while(!mouse.connect())
+        while(!mouse.connect()){
+            lcd.cls();
+            lcd.locate(0,0);
+            lcd.printf("Connect the USB Mouse\n");
             Thread::wait(500);
+        }
     
         // when connected, attach handler called on mouse event
         mouse.attachEvent(onMouseEvent);
@@ -44,20 +71,25 @@
         // wait until the mouse is disconnected
         while(mouse.connected()){
             lcd.cls();
-            led = 1;
+            connect = 1;
             lcd.fillcircle(Xpos,Ypos, 2, 1); 
             wait(.05);
             lcd.fillcircle(Xpos,Ypos, 2, 1); 
             Thread::wait(100);
         }
-        led = 0;
+         connect= 0;
     }
 }
-     
+/*****************************************************************************/
+
+/*****************************************************************************/
+/*This is the main thread. This will do nothing but initiate the mouse task  */
+/*thread and then wait forever in the loop                                   */
+/*****************************************************************************/ 
 int main() {
     Thread mouseTask(mouse_task, NULL, osPriorityNormal, 256 * 4);
     while(1) {
-        //led=!led;
         Thread::wait(osWaitForever);
     }
-}
\ No newline at end of file
+}
+/*****************************************************************************/