// Configure Timer 5.
    TMR5    = 0;
    PR5     = 99; // period match every 100 us
    IPC5SET = ( 1 << 4 ) | ( 1 << 3 ) | ( 1 << 2 ) | ( 1 << 1 ) | ( 1 << 0 ); // interrupt priority level 7, sub 3
    IFS0CLR = ( 1 << 20);
    IEC0SET = ( 1 << 20);

    // Start timers.
    T5CON = ( 1 << 15 ) | ( 1 << 5 ) | ( 1 << 4 ); // fTimer5 = fPb / 8