68HC11, DRAM, SPI, X25020

Posted on 2004-11-28
Last Modified: 2008-01-09
i have 2 questions that i'm currently investigating.

i'm trying to investigate how to use a DP8428 DRAM with a 128k x 8 DRAM chips.
i also want to know how much overhead is is lost due to necessary refreshing

how do i interface X25020 to the 68HC11 SPI embedded function. i also need to write a device driver in C that provides a way to read any particular addressed byte. that is, calling the device driver w/ an argument address will retrun the char stored at that address in the X25020.

i know a little bit of C but haven't programmed in a while so any input, advice, direction, sample etc will be greatly appreciated.

Question by:ransula
    LVL 17

    Accepted Solution

    Why not using static rams? Back to ancient history?
    I know it is not exactly what are You looking for, but You've got schematics and source code for interfacing serial spi eeproms to 68hc11

    Author Comment

    it's a problem that i've been given.
    i wouldn't torture myself that way if i had the choice :)


    Author Comment

    u wouldn't know of any program that will convert a .asm prog to .c
    do u?

    i know the reverse is possible ...
    LVL 17

    Expert Comment

    Unforyunately I don't know of such a program.
    Moreover I can't see any sense in it, unless You have been given such task :)

    Author Comment

    no, i know of the reverse ... so i thought i ask

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