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data storage problem — Parallax Forums

data storage problem

AdrianaAdriana Posts: 7
edited 2007-08-26 18:46 in BASIC Stamp
Hello everybody,··· smilewinkgrin.gif
I need to store data in memory but I don't want to use my EPROM due a short life and program integrity, help needed,·I want to store 5 readings every 3 seconds any RAM recommended?, thanks.tongue.gif

Comments

  • D FaustD Faust Posts: 608
    edited 2007-08-23 21:46
    You mean EEPROM, right?· I think EPROM is erased with UV light as opposed to electrically.· Just a clarification.· I think there is a tool that lets you write to memory card, but the name has escaped me.· Check the Parallax site.

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  • BeanBean Posts: 8,129
    edited 2007-08-24 00:04
    For how long do you want to store the data ? Minutes ? Hours ? Days ?

    I would recommend my SD Data Logger if you want to store data on an SD memory card. Then you can put the SD card into a PC and read the data.
    http://www.hittconsulting.com/products/sddatalogger/

    or the Parallax memory stick logger
    http://www.parallax.com/detail.asp?product_id=27937

    Bean.

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  • RDL2004RDL2004 Posts: 2,554
    edited 2007-08-24 00:08
    It's not clear from what you are asking whether it will do what you need, but you might want to check out how to use a serial eeprom. Here is a Nuts and Volts article that has some info on the I2C version. They are also available in SPI for a bit less code overhead.

    Nuts and Volts 115

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  • Mike GreenMike Green Posts: 23,101
    edited 2007-08-24 01:27
    Also keep in mind that you can use an external RTC with battery backup that includes enough RAM for your purposes.

    Ramtron sells a line of what they call FRAM chips that are "drop-in" compatible with standard EEPROMs and don't have the same limitations of write speed and endurance. Have a look at their website.
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2007-08-26 18:46
    I would be inclined to go with the DS1302 or similar and use its RAM. The FRAM chips are all SMD parts as I recall...Not easy to experiment with unless you have a breakout board.

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    Parallax Tech Support
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