LED.cpp

00001 /*
00002  * PROGRAM RESPONSIBLE FOR open/close door.
00003  * ^^^^^^^ ^^^^^^^^^^^ ^^^ ^^^^^^^^^^ ^^^^
00004  *
00005  * FILE NAME: LED.cpp
00006  * USAGE: program that control 16 LED's that indicate the position of the doors.
00007  */
00008 
00009 
00010 /*
00011 * including the wanted library files.
00012 */
00013 #include "mbed.h"
00014 #include "LED.h"
00015 #include "main.h"
00016 
00017 /*--------------------------*\
00018  *  defineding the variables*
00019 \*--------------------------*/
00020 int floor_level;
00021 int LED_order;
00022 
00023 DigitalOut latch(p8); //  control a digital output pin..
00024 
00025 SPI spi(p5, p6, p7); // SPI bus master; mosi, miso, sclk.
00026 Ticker door_timer; /* using ticker class which repeatedly call a function*/
00027 
00028 void open_close_doors ( int f) { // a function that defined the number of elements and selecting a floor
00029     floor_level=f; // for selecting the wanted floor (0, 1)
00030     LED_order=28; // max. number of the elements
00031 }
00032 
00033 void doors (void) { // a function responsible of turning the LEDs on/off
00034     if (LED_order) {
00035         spi.write(door_light[floor_level][--LED_order]); //Write to the SPI Slave; Send the command.
00036         latch=1;// Deselect the device
00037         latch=0;// Select the device by seting chip select low
00038         if (LED_order==0) // when the LED order reach 0, a new event will be called (timeout)
00039             new_event(timeout);
00040     }
00041 }
00042 
00043 void doors_start (void) {// a ticker function for the LED doors.
00044     spi.format(16,0);
00045     latch =0;// Select the device by seting chip select low
00046     spi.write(0xFFFF); //Write to the SPI Slave; Send (0xFFFF)the command.
00047     latch=1;// Deselect the device
00048     latch=0;
00049     LED_order=0;
00050     door_timer.attach(&doors,0.2);// repeatedly call "doors" function.
00051 }