constant declaration

StampNut2

Please can someone on this forum advise me if this text is correct to insert on each program for constant declarations for each of the stamp chips. Is it inserted at the beginning of each program?
Thanks

#SELECT $STAMP
#CASE BS2, BS2E
CycAdj CON $100 ' x 1.0, adjustment (for ms)
#CASE BS2SX
CycAdj CON $280 ' x 2.5
#CASE BS2P
CycAdj CON $188 ' x 1.53
#CASE BS2PE
CycAdj CON $09E ' x 0.62
#ENDSELECT

RampTm CON 15 ' 15 ms per level

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Never give up when things go wrong.

Duffer

StampNut2 (also?),

This is the code that I use as a template in nearly all of my BSxx programs. I don't use the BS2e, but this should help you verify your code (this all works).

'****************
'Constants
'****************
#SELECT $STAMP                'PULSOUT/PULSIN Scaling
 #CASE BS2
  PScale CON $0100
 #CASE BS2P, BS2PX
  PScale CON $0280
#ENDSELECT
#SELECT $STAMP                'FREQOUT Duration Scaling
 #CASE BS2
  FODScale CON $0100
 #CASE BS2P, BS2PX
  FODScale CON $03C6
#ENDSELECT
#SELECT $STAMP                'FREQOUT Freq Scaling
 #CASE BS2
  FOFScale CON $0100
 #CASE BS2P, BS2PX
  FOFScale CON $0044
#ENDSELECT
#SELECT $STAMP                'Baud Rates
  #CASE BS2
    T1200       CON     813
    T2400       CON     396
    T4800       CON     188
    T9600       CON     84
    T19K2       CON     32
    T38K4       CON     6
  #CASE BS2P
    T1200       CON     2063
    T2400       CON     1021
    T4800       CON     500
    T9600       CON     240
    T19K2       CON     110
    T38K4       CON     45
#ENDSELECT

I do this because I tend to run the same code on several Stamp platforms with different chips and this way I don't have to worry about making code changes. I just got into·the habit of always using·scaling when I write the code, i.e. PULSOUT 13,·Dur */ PScale. I also use the baud rates section by defining·a variable (could also be another constant if space is a concern)·and setting it equal to the constant derived by the conditional code.· i.e.· BRate··VAR· Word·and then BRate = T9600.· Then in my code I just use BRate·like this:· SEROUT TxPin. Brate, [noparse][[/noparse]"C", 63, 63, 20, $F8, $00] allowing me to change baud rates by changing a single variable (BRate from T9600 to T19K2) without having to find and change every occurrence.

Steve

Post Edited (Duffer) : 8/20/2007 9:22:47 PM GMT

Chris Savage

Hello,

These are the constants for a specific program and for multiple BASIC Stamp Models. Not every program need start like this. Reading the, “What’s a Microcontroller?” manual might give you some more simple examples of how to format your code. Take care.

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Chris Savage
Parallax Tech Support

StampNut2

Hey guys, Thanks for your time. This forum rocks. So much talent.

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Never give up when things go wrong.