main.cpp

00001 #include "mbed.h"
00002 #include "TSISensor.h"
00003 
00004 #define LED_ON                  0
00005 #define LED_OFF                 1
00006 #define RGB_COMPONENTS          3
00007 #define RGB_COLORS              ((int) pow(2 *1.0, RGB_COMPONENTS *1.0))
00008 #define BAUDRATE                115200
00009 #define MAXDELAY                0.3
00010 #define UART_INTERVAL           0.2
00011 
00012 float sliderNewValue;       // temp data of touch slider
00013 float mainLoopDuration;     // main loop measurement
00014 float delay = MAXDELAY;     // blink delay
00015 Serial pc(USBTX, USBRX);    // UART
00016 
00017 void debugOutput()
00018 {
00019     if (sliderNewValue > 0)
00020     {
00021         // UART output
00022         pc.printf("slider input = %3.0f%%  -->  ", 100.0 * sliderNewValue);
00023         pc.printf("blink delay = %3.0f ms", 1000 * delay);
00024         pc.printf("   (last main loop took %4.0f ms)\n", mainLoopDuration);
00025     }
00026 }
00027 
00028 int main()
00029 {
00030     // RGB LED
00031     DigitalOut led_rgb_red(LED1);   // red
00032     DigitalOut led_rgb_grn(LED2);   // green
00033     DigitalOut led_rgb_blu(LED3);   // blue
00034     DigitalOut led_rgb[RGB_COMPONENTS] = {led_rgb_red, led_rgb_grn, led_rgb_blu};
00035     
00036     // Touch slider
00037     TSISensor tsi;
00038     
00039     // UART
00040     pc.baud(BAUDRATE);
00041     
00042     // ticker for debugOutput()
00043     Ticker ticker1;
00044     ticker1.attach(&debugOutput, UART_INTERVAL);
00045 
00046     // timer for main loop measurement
00047     Timer timer1;
00048 
00049     // main loop
00050     while (true)
00051     {
00052         timer1.start();
00053         
00054         // show all colors
00055         for (int i=1; i<RGB_COLORS; i++, wait(delay))   // for each possible color
00056         {
00057             for (int j=0; j<RGB_COMPONENTS; j++)            // for each LED component
00058                 led_rgb[j] = ( i & 1<<j ) ? LED_ON : LED_OFF;   // set LED component according to active color
00059 
00060             // check for active slider input
00061             if ( (sliderNewValue = tsi.readPercentage()) > 0)
00062             {
00063                 // set delay to slider input
00064                 delay = MAXDELAY * sliderNewValue;
00065             }
00066         }
00067     
00068         timer1.stop();
00069         mainLoopDuration = timer1.read_ms();
00070         timer1.reset();
00071     }
00072 }