File content as of revision 4:6bf4cdb7b834:

/****************************************************************************
- Following program is to emulate Infinity channel switching.
- embeds are used to send hotkey combination to switch channel. 
- CTRL+SHIFT+[1-4] is used to switch among four channels.
- LCD screen on mbed application board is used to show switch status and count.

****************************************************************************/


#include "mbed.h"
#include "C12832.h"
#include "USBKeyboard.h"


// To change LED colour at channel switching
BusOut leds(p23, p24, p25);
BusOut myleds(LED1, LED2, LED3, LED4);

// keyboard interface to emulate keyboard and send keys with modifiers
USBKeyboard keyboard;

// LCD interface on appication board
C12832 lcd(p5, p7, p6, p8, p11);

// Switching period: 'every <speed> seconds'
const float speed = 10.0;
const int hotkeys = KEY_CTRL | KEY_SHIFT;
const int maxChannels = 3;
const int maxChSw = 60;
const int remainMinutesMax = 50;

void lcd_print(int key, int count, float speed) {
    lcd.cls();
    lcd.locate(0,0);
    lcd.printf("Sending CTRL+SHIFT+%c \nCount: %d\nSpeed: %4.2f\n", key, count, speed);
}

void lcd_print2(int rMinutes, int rMinutesMax) {
    lcd.cls();
    lcd.locate(0,0);
    lcd.printf("Idle time:\n>>> %d/%d minutes\n", rMinutes, rMinutesMax);
}

// Start programm
int main(void) {
    int key_base;
    int count = 1; // Cumulative channel switching count
    char key_modifier;
    
    //Disconnect any existing connections
    lcd.cls();
    lcd.locate(0,0);
    lcd.printf("Starting Up..\nAllowing USB to settle\n>>Please Wait<< ");
    wait(10);
 
    // Loop forever:
    // (1) Channel switch continuously for maxChSw in first part of hour.
    // (2) Idle (no channel switching for remainder of hour.   
    while(1) {
        
        int chswTotal = 1;
        
        // (1) Channel switch continuously.        
        while(chswTotal <= maxChSw) {
            key_base = 1;
            while(key_base <= maxChannels) {
                lcd.cls();
                leds = ~key_base;
                myleds = key_base;
                key_modifier = '0'+key_base;
                keyboard.keyCode(key_modifier, hotkeys);
                lcd_print(key_modifier, count, speed);
                wait(speed);
                key_base++;
                count++;
                chswTotal++;          
            }
        }
        
        // (2) Idle for remainder of hour, counting up
        // every 1 minute.
        int remainMin = 1;
        while(remainMin <= remainMinutesMax) {
            lcd_print2(remainMin, remainMinutesMax);
            wait(60.0);
            remainMin++;
        }                      
    }
}