FourDisplay driver

[valoni]

tested this drivers (everything work well until using DOTS)

problem appear if used 0x80 check this code to understand problem

/// bool point=true;

        FourDigitDisplay fdd = new FourDigitDisplay(Fez.Gpio.D3, Fez.Gpio.D4);
        fdd.SetBrightness(FourDigitDisplay.Brightness.Pw01);

        while (true)
        {
            for (int d1 = 0; d1 < 10; d1++)
                for (int d2 = 0; d2 < 10; d2++)
                    for (int d3 = 0; d3 < 10; d3++)
                        for (int d4 = 0; d4 < 10; d4++)
                        { 
                            //show point 
                            fdd.SetPoint(point);  
                           /* if point = true  than number 4 appear as 9 and . number 1 appear as 7   
                               if point = false everything was ok seem problem appear on SHIFT LEFT ..
                            */

                            //show values 
                            fdd.Display(d1,d2,d3,d4);

                            point = !point;
                            Thread.Sleep(350);
                        }
        }

[valoni]

on BrainPad it run well

[bauland]

Seems to be come from only port of nucleo 411