LED.cpp

00001 /*--------------------------------------------------------------------------------
00002 Filename: LED.cpp
00003 Description: Holds source code for configuring the RGB LED and also buzzer becuase 
00004              where else do I put it :P
00005 --------------------------------------------------------------------------------*/
00006 
00007 #include "LED.h"
00008 
00009 /*--------------------------------------------------------------------------------
00010 Function name: cRGB_LED
00011 Input Parameters: N/A
00012 Output Parameters: N/A
00013 Description: Class constructor (Initialisation upon creating class)
00014 ----------------------------------------------------------------------------------*/
00015 cRGB_LED::cRGB_LED(DigitalOut DIAG_RED, PwmOut DIAG_BLU, PwmOut DIAG_GRN): _DIAG_RED(DIAG_RED), _DIAG_BLU(DIAG_BLU), _DIAG_GRN(DIAG_GRN)
00016 {
00017     // Set initial condition of PWM
00018     _DIAG_BLU.period(0.001); //1KHz
00019     _DIAG_BLU = 0;
00020 
00021     // Set initial condition of PWM
00022     _DIAG_GRN.period(0.001); //1KHz
00023     _DIAG_GRN = 0;
00024 
00025     // Initial condition of output enables
00026     _DIAG_RED = 0;
00027     
00028     //Initialise battery level
00029     _battery_level = 0;
00030     
00031 }
00032 
00033 /*--------------------------------------------------------------------------------
00034 Function name: cRGB_LED
00035 Input Parameters: N/A
00036 Output Parameters: N/A
00037 Description: Turns on red led
00038 ----------------------------------------------------------------------------------*/
00039 void cRGB_LED::red_led()
00040 {
00041     _DIAG_RED = 1;      //Enable red
00042     _DIAG_BLU = 0.0;    //Disable Blue
00043     _DIAG_GRN = 0.0;    //Disable Green
00044 }
00045 
00046 /*--------------------------------------------------------------------------------
00047 Function name: blue_led()
00048 Input Parameters: N/A
00049 Output Parameters: N/A
00050 Description: Turns on blue led
00051 ----------------------------------------------------------------------------------*/
00052 void cRGB_LED::blue_led()
00053 {
00054     _DIAG_RED = 0;      //Disable Red
00055     _DIAG_BLU = 1.0;    //Enable Blue
00056     _DIAG_GRN = 0.0;    //Enable Green
00057 }
00058 
00059 /*--------------------------------------------------------------------------------
00060 Function name: green_led()
00061 Input Parameters: N/A
00062 Output Parameters: N/A
00063 Description: Turns on green led
00064 ----------------------------------------------------------------------------------*/
00065 void cRGB_LED::green_led()
00066 {
00067     _DIAG_RED = 0;      //Disable Red
00068     _DIAG_BLU = 0.0;    //Disable Blue
00069     _DIAG_GRN = 1.0;    //Enable Green 
00070 }
00071 
00072 /*--------------------------------------------------------------------------------
00073 Function name: yellow_led()
00074 Input Parameters: N/A
00075 Output Parameters: N/A
00076 Description: Turns on yellow led
00077 ----------------------------------------------------------------------------------*/
00078 void cRGB_LED::yellow_led()
00079 {
00080     _DIAG_RED = 1;      //Enable Red
00081     _DIAG_BLU = 0.0;    //Disable Blue
00082     _DIAG_GRN = 0.35;   //Enable Green at 35% duty 
00083 }
00084 
00085 /*--------------------------------------------------------------------------------
00086 Function name: ORANGE_LED ()
00087 Input Parameters: N/A
00088 Output Parameters: N/A
00089 Description: Turns on orange led
00090 ----------------------------------------------------------------------------------*/
00091 void cRGB_LED::orange_led()
00092 {
00093     _DIAG_RED = 1.0f;      //Enable Red
00094     _DIAG_BLU = 0.0f;    //Disable Blue
00095     _DIAG_GRN = 0.647f;   //Enable Green at 35% duty 
00096 }
00097 
00098 /*--------------------------------------------------------------------------------
00099 Function name: led_off()
00100 Input Parameters: N/A
00101 Output Parameters: N/A
00102 Description: Turns the led off
00103 ----------------------------------------------------------------------------------*/
00104 void cRGB_LED::led_off()
00105 {
00106     _DIAG_RED = 0;  //Disable Red
00107     _DIAG_BLU = 0;  //Disable Blue
00108     _DIAG_GRN = 0;  //Disable Green
00109 }
00110 
00111 
00112 /*--------------------------------------------------------------------------------
00113 Function name: record_power()
00114 Input Parameters: vBatt - the battery voltage level
00115 Output Parameters: N/A
00116 Description: Stores an input battery level privately in the LED class
00117 ----------------------------------------------------------------------------------*/
00118 void cRGB_LED::record_power(float vBatt)
00119 {
00120     _battery_level = vBatt; //Record battery level for LED class
00121 }
00122 
00123 /*--------------------------------------------------------------------------------
00124 Function name: display_power()
00125 Input Parameters: N/A
00126 Output Parameters: N/A
00127 Description: Sets the LED colour based on the input voltage levels
00128 ----------------------------------------------------------------------------------*/
00129 void cRGB_LED::display_power()
00130 {
00131     if (_battery_level >= 4.0f)
00132     {
00133         green_led();  //Power above 70%      
00134     }
00135     else if (_battery_level < 4.0f){
00136     
00137         orange_led();  //Power above 40%
00138     }
00139     else if (_battery_level < 3.70f) 
00140     {
00141         red_led();  //Low power needs charging
00142     }
00143     else{
00144         
00145         //SOMETHING WENT WRONG!
00146     }  
00147 }