how to write data and let the BS2p40 to read

Comments

• T Chap Posts: 4,260

  2006-08-13 05:07 edited 2006-08-13 05:07

  In the Basic Stamp Command Reference, lookup "Write". Keep in mind you can only write to the eeprom so many times before you kill it, maybe 100k times?
• Zoot Posts: 2,227

  2006-08-14 17:54 edited 2006-08-14 17:54

  Here's some simple code that may help get you started.
  
  

  FullName   DATA    (40)     '40 characters of "blank" or "undefined" data --
                                   'this way your program won't overwrite your data when you download your program
  Phone   DATA   (10)     '10 character phone number
  
  EEaddr  VAR     Word    'EEPROM pointer
  somedat   VAR      Byte    'some data
  idx       VAR      Byte     'index counter
  
  '...........some code here to run your LCD and buttons
  '....and write into to EEPROM
  
  '...........here's reading the Name -- do the opposite with WRITE to store info entered via LCD
  
  EEaddr = FullName
  FOR idx = 0 TO 39
     EEaddr = EEaddr + idx
     READ EEaddr, somedat
     DEBUG somedat
  NEXT
  
  

  
  
  
  When you are writing your data, just remember to write one byte at a time, as each character will be a byte. Is this helpful?
  
  Regarding the 100k writes -- search the forums for Andy Lindsey's recent posts regarding "rollover" of often used EE addresses -- basically you move the data around occasionally so that you are not constantly writing to the same locations. But if you are entering phone number/name only once a week or once a month, it will be a while till you hit the limits.
  
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