File content as of revision 2:61fcde3ffe6e:

#include "mbed.h"
#include "TSISensor.h"

#define LED_ON                  0
#define LED_OFF                 1
#define RGB_COMPONENTS          3
#define RGB_COLORS              ((int) pow(2 *1.0, RGB_COMPONENTS *1.0))
#define BAUDRATE                115200
#define MAXDELAY                0.3
#define UART_INTERVAL           0.2

float sliderNewValue;       // temp data of touch slider
float mainLoopDuration;     // main loop measurement
float delay = MAXDELAY;     // blink delay
Serial pc(USBTX, USBRX);    // UART

void debugOutput()
{
    if (sliderNewValue > 0)
    {
        // UART output
        pc.printf("slider input = %3.0f%%  -->  ", 100.0 * sliderNewValue);
        pc.printf("blink delay = %3.0f ms", 1000 * delay);
        pc.printf("   (last main loop took %4.0f ms)\n", mainLoopDuration);
    }
}

int main()
{
    // RGB LED
    DigitalOut led_rgb_red(LED1);   // red
    DigitalOut led_rgb_grn(LED2);   // green
    DigitalOut led_rgb_blu(LED3);   // blue
    DigitalOut led_rgb[RGB_COMPONENTS] = {led_rgb_red, led_rgb_grn, led_rgb_blu};
    
    // Touch slider
    TSISensor tsi;
    
    // UART
    pc.baud(BAUDRATE);
    
    // ticker for debugOutput()
    Ticker ticker1;
    ticker1.attach(&debugOutput, UART_INTERVAL);

    // timer for main loop measurement
    Timer timer1;

    // main loop
    while (true)
    {
        timer1.start();
        
        // show all colors
        for (int i=1; i<RGB_COLORS; i++, wait(delay))   // for each possible color
        {
            for (int j=0; j<RGB_COMPONENTS; j++)            // for each LED component
                led_rgb[j] = ( i & 1<<j ) ? LED_ON : LED_OFF;   // set LED component according to active color

            // check for active slider input
            if ( (sliderNewValue = tsi.readPercentage()) > 0)
            {
                // set delay to slider input
                delay = MAXDELAY * sliderNewValue;
            }
        }
    
        timer1.stop();
        mainLoopDuration = timer1.read_ms();
        timer1.reset();
    }
}