Is the serial backpack from Sparkfun....

Buck Rogers

Hello!
Is the Sparkfun Serial Enabled backpack for LCD displays compatible with the LCD functions for the BS2?

This is covered here:
http://www.sparkfun.com/commerce/product_info.php?products_id=258

I have both the backpack and the parallel LCD display so I don't need to track them down. I suspect the display is compatible with the BS2.
:mad:
Incidentally the beginning baud rate for the backpack is 9600 baud.:mad:

Franklin

Have you compared the instruction sets? That would tell you.

sylvie369

Are you talking about the commands LCDCMD, LCDIN and LCDOUT?

Those commands are for using a BS2p, BS2px, or BS2pe to control a parallel LCD (and they are not available on the other flavors of BS2)
The Sparkfun backpack is for using serial commands to control a parallel LCD, using a single I/O pin.

In short, they're two different solutions to the same problem, and there's no reason to use both at once. If you have the serial backpack, you don't need the LCD commands - you control the LCD through SEROUT commands, just as though you were writing to the screen (well, I suppose you'd use DEBUG instead, but it's the same thing).

If you have a 2p, 2pe or 2px, you can use cheaper parallel LCDs without the backpack, though you do need to use quite a few of your I/O pins to control it that way.

If you already have the backpack, you should be able to connect it to your parallel LCD, and easily control it using the BS2 and the SEROUT command (and possibly some SERINs as well).

Morrolan

The BS2 LCD commands are not compatible, but it isn't difficult to control a SparkFun Serial LCD backpack from a BS2 - I've done it lots of times and have demo code if required.

RAS1

Can you send me some example codes for this product?
Thank you!

Ron Czapala

Here is some demo code for the Sparkfun Serial LCDs

' {$STAMP BS2}
' {$PBASIC 2.5}
lcd_cmd     CON    $FE   'command prefix
lcd_cmd2    CON    $7C   'special command prefix
clrLCD      CON    $01   'Clear entire LCD screen
displayOff  CON    $08   'Display off
displayOn   CON    $0C   'Display ON
noCurs      CON    $0C   'Make cursor invisible
ulCurs      CON    $0E   'Show underline cursor
blkCurs     CON    $0D   'Show blinking block cursor
curpos      CON    $80   'set cursor  + position  (row 1=0 TO 15, row 2 = 64 TO 79)
scrollRight CON    $1C
scrollLeft  CON    $18
curRight    CON    $14
curLeft     CON    $10
#SELECT $STAMP                          ' Select Baud constants
  #CASE BS2, BS2E, BS2PE
    T1200       CON     813
    T2400       CON     396
    T4800       CON     188
    T9600       CON     84
    T19K2       CON     32
  #CASE BS2SX, BS2P
    T1200       CON     2063
    T2400       CON     1021
    T4800       CON     500
    T9600       CON     240
    T19K2       CON     110
  #CASE BS2PX
    T1200       CON     3313
    T2400       CON     1646
    T4800       CON     813
    T9600       CON     396
    T19K2       CON     188
#ENDSELECT
Inverted        CON     $4000           'Value for inverted serial format
Baud            CON     T9600      '+ Inverted 8,N,1 inverted
LCD CON 4
i VAR Byte
SEROUT LCD,Baud,[lcd_cmd, displayOn]
SEROUT LCD,Baud,[lcd_cmd, clrLCD]
SEROUT lcd,Baud,[lcd_cmd, curpos+6, "AAA", lcd_cmd, curpos+68, "BBBBB"]
SEROUT lcd,Baud,[lcd_cmd2, $0A]   'ctrl-j   Save Splash screen
PAUSE 2000
SEROUT LCD,Baud,[lcd_cmd, clrLCD, noCurs]
SEROUT LCD,Baud,[lcd_cmd, curpos + 0,"Test line 1"]
PAUSE 500
SEROUT LCD,Baud,[lcd_cmd, curpos + 64,"Test line 2"]
PAUSE 1000
FOR i = 0 TO 5
 SEROUT LCD,Baud,[lcd_cmd, scrollRight]
 PAUSE 500
NEXT
FOR i = 0 TO 5
 SEROUT LCD,Baud,[lcd_cmd, scrollLeft]
 PAUSE 500
NEXT
'Backlight values: 128-157
SEROUT LCD,Baud,[lcd_cmd2, $8C]   '40% backlight
PAUSE 3000
SEROUT LCD,Baud,[lcd_cmd2, $96]   '73% backlight
PAUSE 3000
SEROUT LCD,Baud,[lcd_cmd2, $9D]   '100% backlight
PAUSE 1000
SEROUT LCD,Baud,[lcd_cmd2, $80]   'backlight off
SEROUT LCD,Baud,[lcd_cmd, displayOff]
END ' Finished.