B4R Code Snippet Reading 6 CJMCU (96 Pins) for keyboard

    Dim myport(12) As Byte
    Dim getmyport(12) As Byte
    Dim tiI2C As Timer

'----------------------------------------

private Sub AppStart

master.Initialize  ' --------------------------clk pin1 - sda pin2
    For i = 0 To 11 ' -------------------------set all bytes to Input and pull up, prefill status
        Dim ioCounter As UInt = 0x20 + i/2  'calculate chip address'
        Dim ioSide As UInt = Bit.Get(i,0) 'calculate upper/lower byte'
    
        master.WriteTo(ioCounter, Array As  Byte(ioSide, 0xFF)) '---- input
        master.WriteTo(ioCounter, Array As  Byte(0x0C + ioSide, 0xFF)) '--- pull up
        
        getmyport(i) = DigitalRead(ioCounter,ioSide)
        If getmyport(i) <> myport(i) Then
            myport(i) = getmyport(i)
        End If
    Next

     tiI2C.Initialize("myTiTick",10) ' normal 10 to 30 ms
     tiI2C.Enabled = True
end sub

private Sub myTiTick

    For i = 0 To 11
        Dim ioCounter As UInt = 0x20 + i/2
        Dim ioSide As UInt = Bit.Get(i,0)
        getmyport(i) = DigitalRead(ioCounter,ioSide)
     
        If getmyport(i) <> myport(i) Then
            If i < 6 Then ' only necessary for 2 channel play
                intent = 0x81
            Else
               intent = 0x80
            End If

            'Log(ioCounter," ",ioSide," ",getmyport(i))
            For ii = 0 To 7
                If Bit.Get(myport(i),ii) <> Bit.Get(getmyport(i),ii) Then
                    If Bit.Get(getmyport(i),ii) = 0 Then intent = intent + 0x10  ' -----------------tone is on. 0x90 for chanel 0, 0x91 for chanel 1
                    sendTone(ii + 1 + (i*8)," A",intent) ' ----------------------------output of pin Nr 0 - 95 for tone definition
                End If
            Next
            myport(i) = getmyport(i)
        End If
    Next

... and have fun