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Thread: Protoboard, can load RAM but cant load EEPROM?

  1. #1

    Default Protoboard, can load RAM but cant load EEPROM?

    Hi guys!


    Have finished soldering everything up on my latest protoboard. Everything works, but i just cant load the EEPROM, just load the RAM.


    Its not the PC because i can load the Prof. Developmentboard without a glitch.

  2. #2

    Default Re: Protoboard, can load RAM but cant load EEPROM?

    Check the area around the EEPROM for shorts. Carefully touch up the solder connections on the EEPROM. Once your program is loaded into the RAM and the PC tells the bootloader to copy it to the EEPROM, the Prop does all the work.

    Was there some kind of program in the EEPROM already? If so, did it work? If the Prop can read from the EEPROM, it should be able to write to it unless the /WP pin on the EEPROM isn't connected properly.

  3. #3

    Default Re: Protoboard, can load RAM but cant load EEPROM?

    Did you solder anything to P28 or P29? That's the I2C bus pins that the eeprom is on...

  4. #4

    Default Re: Protoboard, can load RAM but cant load EEPROM?

    Hi.

    Check You have an EEProm that are 32 KBytes else bigger


    Quote Originally Posted by Crosswinds View Post
    Hi guys!


    Have finished soldering everything up on my latest protoboard. Everything works, but i just cant load the EEPROM, just load the RAM.


    Its not the PC because i can load the Prof. Developmentboard without a glitch.
    Regards
    Sapieha
    __________________________________________________ ___
    Nothing is impossible, there are only different degrees of difficulty.
    For every stupid question there is at least one intelligent answer.
    Don't guess - ask instead.
    If you don't ask you won't know.
    If your gonna construct something, make it as simple as possible yet as versatile/usable as possible.

  5. #5

    Default Re: Protoboard, can load RAM but cant load EEPROM?

    Quote Originally Posted by Mike Green View Post
    Check the area around the EEPROM for shorts. Carefully touch up the solder connections on the EEPROM. Once your program is loaded into the RAM and the PC tells the bootloader to copy it to the EEPROM, the Prop does all the work.

    Was there some kind of program in the EEPROM already? If so, did it work? If the Prop can read from the EEPROM, it should be able to write to it unless the /WP pin on the EEPROM isn't connected properly.
    Hello Mike!

    The EEPROM looks great. and this is a brand new board. But i think rayman have the answer. I have wired a button-input to the P29 -.-

    Quote Originally Posted by Rayman View Post
    Did you solder anything to P28 or P29? That's the I2C bus pins that the eeprom is on...
    Mygod, i have wired a button in-put to P29. I certainly dont hope i have ruined the EEPROM now?

    Feel really stupid. i assumed that the EEPROM-input pins were some of the unmarked ones on the board.

    My ignorance.

    Quote Originally Posted by Sapieha View Post
    Hi.

    Check You have an EEProm that are 32 KBytes else bigger

    Its the standard one that is surfacemounted!

  6. #6

    Default Re: Protoboard, can load RAM but cant load EEPROM?

    You probably didn't ruin the eeprom but you could've pulled the data line of the I2C buss to either 1 or 0 depending if the switch is connect to 3.3V or GND. This would cause the eeprom to fail. If you connected this line directly to 5 V then some damage could've happened.

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