'' **********************************************************************
' ** Program name: S1DEB7.BAS -  Version : 1.1   -   02  June  1999   **
' ** Compiler : BASCOM LT, (IDE V.1.20, LIB V.1.27)                   **
' ** Board : GPC(r) 554                                               **
' ** Firm:   grifo(r) ITALIAN TECHNOLOGY                              **
' ** Via Dell' Artigiano 8/6          40016 San Giorgio di Piano (BO) **
' ** Tel.+39 051 892 052     Fax +39 051 893 661                      **
' ** http://www.grifo.com    http://www.grifo.it                      **
' ** sales@grifo.it          tech@grifo.it          grifo@grifo.it    **
' **                                                                  **
' ** Written by:  Graziano Gaiba                                      **
' **********************************************************************
'
' This program shifts the lighting of a LED to one direction or the other
' according to the status of jumper 2. If jumper 2 is connected shifts from
' the red LEDs to the others.
' To achieve the visualization of the lines, you should connect the CN5
' connector of GPC(r) 554 board to the CN15 connector of DEB(r) 01 board by
' a 20 to 26-pin adapter flat cable.
' ATTENTION! To address correctly the 80552 I/O lines you shuold select the
' 80552 register file. To do this, select tab Misc from the Options/Compiler 
' menu, click in the Register file text box then select the file 80552.DAT.
'
'************************ Compiler Directives  *******************************
'
$romstart = &H8050                 ' start address of machine code
$ramstart = &HD000                 ' start address of data area
$ramsize = &H2800                  ' 10k of data area
$crystal = 22118400                ' clock of microcontroller
$baud = 19200                      ' RS-232 baud rate
$large                             ' 16 bit addressing mode
'
'************************** Constant declarations ****************************
'
Dim Rundebug As Const &HFFFD       ' run/debug register
'
'************************** Variable declarations ****************************
'
Dim Shifter As Byte                ' Lighting shifter
Dim J2 As Byte                     ' Stores status of jumper 2
Dim Port4 As Bit                   ' If 1 selects port 4, else selects port 1

Waitms 1                           ' Delay for signals settling
'
'***************************** Main Program **********************************
'
Print "    Demonstration program 7 for section 1 of DEB(r) 01 board"
Print : Print "    Shifts the lighting of a LED to one direction (from red LEDs to others)"
Print "    if jumper 2 is connected, otherwise shifts to the other direction."
Print : Print "    Running..."
Print
Shifter = 1                        ' Starts with the LSB
Port4 = 1                          ' Selects port A as first
Do
   Shifter = Not Shifter           ' Negates to drive LEDs in negated logic
   If Port4 = 0 Then               ' If port 4 selected
      P1 = 255                     ' Turns off port 1 LEDs
      P4 = Shifter                 ' Drives port 4 LEDs 
   Else
      P1 = Shifter                 ' Drives port 1 LEDs
      P4 = 255                     ' Turns off port 4 LEDs
   End If
   Shifter = Not Shifter           ' Restores normal value for rotation
   Waitms 255                      ' Delay for few rotations per second
   J2 = Inp(rundebug)              ' Reads the run/debug register
   J2 = J2 And &B10000000          ' Isolates jumper 2
   If J2 = 0 Then                  ' If jumper 2 is connected
      Rotate Shifter , Left        ' Shift from red LEDs to others
   Else
      Rotate Shifter , Right       ' Else does the opposite
   End If
   If Shifter = 0 Then             ' If rotation is over 
      Port4 = Not Port4            ' Switch selection between port A and C
      If J2 = 0 Then               ' If jumper 2 is connected
         Shifter = 1               ' Restart shifting from red LEDs to others
      Else
         Shifter = 128             'Else restart shifting to the other direction
      End If
   End If

Loop

End
'
'*************************** End of Main program *****************************
'