main.cpp

00001 /* Hello World! for the Emwin TFT Library */
00002 
00003 #include "mbed.h"
00004 #include "GUI.h"
00005 #include "cy8ckit_028_tft.h"
00006 
00007 #define LED_DIAMETER    (8)
00008 #define LED_RADIUS      (LED_DIAMETER/2)
00009 #define DISPLAY_X       (320)
00010 #define DISPLAY_Y       (240)
00011 #define NUMLEDS_X       (DISPLAY_X/LED_DIAMETER)
00012 #define NUMLEDS_Y       (DISPLAY_Y/LED_DIAMETER)
00013 #define LED_OFF         (0)
00014 #define LED_ON          (1)
00015 #define TITLE_OFFSET    (16+LED_RADIUS)    
00016 
00017 AnalogIn lightlevel(P10_0);  
00018 DigitalOut lights(LED4);
00019 DigitalOut lightsR(LED1);
00020 DigitalOut lightsG(LED3);
00021 DigitalOut lightsB(LED2);
00022 
00023 
00024 bool lightStatus;
00025 
00026 void Display_Init(void)
00027 {
00028     /* Initialise EmWin driver*/
00029     GUI_Init();
00030 
00031     /* Set font size, foreground and background Colours */
00032     GUI_SetFont(GUI_FONT_24B_1);
00033     GUI_SetColor(GUI_WHITE);
00034     GUI_SetBkColor(GUI_BLACK);
00035 
00036     /* Clear screen and print splash screen */
00037     GUI_Clear();
00038     GUI_SetTextAlign(GUI_TA_HCENTER);
00039     GUI_DispStringAt("LIGHT SENSOR", 160, 0);
00040 }
00041 
00042 int main()
00043 {
00044     int lowThresh, highThresh;
00045     lowThresh = 40;
00046     highThresh = 70;
00047     lights, 0;
00048     
00049 
00050     /* Initialise display */
00051     Display_Init();
00052 
00053     printf("LIGHT LEVEL CONTROL\r\n");
00054     lightStatus = false;
00055 
00056     GUI_SetFont(GUI_FONT_D80);
00057     GUI_SetColor(GUI_BLUE);
00058     while(true){
00059         int lightpercent;
00060         lightpercent = (lightlevel.read_u16()*100)/65535;
00061         printf("light level is %d\r\n", lightpercent);
00062         if(lightpercent > highThresh) lightStatus = 1;
00063         else if(lightpercent < lowThresh) lightStatus = 0;
00064         lights = lightStatus;
00065         if(lightpercent > highThresh) {
00066             lightsB = 0;
00067             lightsR = 1;
00068             lightsG = 1;
00069             }
00070         if(lightpercent < highThresh && lightpercent > lowThresh) {
00071             lightsB = 1;
00072             lightsR = 1;
00073             lightsG = 0;
00074             }
00075          if(lightpercent < lowThresh) {
00076             lightsB = 1;
00077             lightsR = 0;
00078             lightsG = 1;
00079             }
00080             
00081         ThisThread::sleep_for(1000);
00082         char buffer[16];
00083         sprintf(buffer, "%d", lightpercent);
00084         GUI_DispStringAt(buffer, 30, 30);
00085         GUI_SetColor(GUI_DARKGREEN);
00086         GUI_FillRect(260, 30, 300, 220);
00087         GUI_SetColor(GUI_GREEN);
00088         GUI_FillRect(260, 220 - lightpercent * 2, 300, 220);
00089          
00090         }
00091     
00092 }
00093 
00094 
00095