Clearing EEPROM

Comments

• Pavel Posts: 43

  2008-03-21 15:09 edited 2008-03-21 15:09

  You do not need to clear EEPROM, you just upload the new version of your program there, overwriting the old version. Even though the program starts executing when you power the chip, the programming connection will reset the chip to upload the new code.
  
  In other words, just hit F11 again and new code will go into EEPROM.
• Searider Posts: 290

  2008-03-21 16:40 edited 2008-03-21 16:40

  You can also press F10 and what ever program you have up will load into RAM and execute. When you reset it will go back to runing the program that was last loaded into ROM.
  
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  ---

  
  Searider

  ---
• Iamretired Posts: 56

  2011-07-27 12:28 edited 2011-07-27 12:28

  I want to also clear EEPROM. I don't want to do anything else. What can I do to clear a program out of EEPROM?
  
  John
• RonP Posts: 384

  2011-07-27 12:32 edited 2011-07-27 12:32

  You could just write a Do Nothing program if that will work for you.
  

  PUB DoNothing
  

  
  Upload to EEPROM F11. Upon boot up the Propeller will Do Nothing.
  
  Ron
• Bobb Fwed Posts: 1,119

  2011-07-27 13:47 edited 2011-07-27 13:47

  Or programmatically:

  ' using Basic I2C Driver or PASM I2C Driver
  PRI _errase | i, empty[16]
  '' errase EEPROM memory
  
    longfill(@empty, 0, 16)
  
    REPEAT i FROM $0 TO $7FFF STEP 64
      write(i, @empty, 64)
  
  PUB write (addr, valueAddr, size) | time
  '' write page to EEPROM with watchdog  
  
    IF i2c.WritePage(BootPin, EEPROM, addr, valueAddr, size)
      RETURN false
    time := cnt
    repeat while i2c.WriteWait(BootPin, EEPROM, addr)                             ' wait for watchdog
      if cnt - time > clkfreq / 10
        RETURN false
  
    RETURN true
  

  Probably not as efficient as it could be, but it's the way I've do it on a non-time sensitive system.