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Type: Posts; User: spartekus

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  1. Closed: Our header files are static or dynamic library

    Hi Everyone,

    when we create own headers, for istance, math,c and math.h.
    When we include them, does compiler make them shared or static library.
    Thank you

    project :
    main.c
    math.c
    ...
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    Closed: Re: How does bootloader know about RAM?

    noone knows?
    maybe any suggestions about what i should read?
  3. Replies
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    1,908

    Closed: How does bootloader know about RAM?

    Hi everyone,

    I want to learn about linux porting. I was reading some documents, but none of them explains how to give u-boot new RAM address.
    How does u-boot know where to find RAM, which address...
  4. Closed: Uboot switching from RAM to ROM based booting

    Hi,

    my linux board only boots form ROM, so anything i created or any configurations are gone after restart.
    Any idea how can i start in on ROM?
    thank you
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    Closed: Re: nor flash memory map

    hi:)

    thanks for asnwering.
    linux board is LS1043,
    datasheet is Freescale Linux LS1043A SDK.
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    Closed: nor flash memory map

    Hi everyone,

    -on the data sheet a table, nor flash memory map is given:
    start end offset description size.
    .
    .
    .


    does anyone know, when and how do...
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    Closed: Re: understanding PCI express root complex

    linux environment, hardware is different.
    a driver should be written, it is clear.

    in the architecture of PCIe, there are some layers, such as, Transaction Layer -> data link layer -> physical...
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    Closed: Re: understanding PCI express root complex

    Hi Srizbf,

    i didnt want to open new topic related to this.
    Something confuses me still:
    Transaction Layer -> data link layer -> physical layer. These should be programmed or they are already...
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    [SOLVED]Closed: Re: how can C code access device driver?

    thank you srizbf:)
    do you know any link for tutorial or example, i can read more about it? It would be so usefull.
  10. Replies
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    [SOLVED]Closed: how can C code access device driver?

    Hi everyone,

    i want to write a device driver (in linux), which has functions such as "write_memory" "read_memory", but i want to decide in C, when these functions will work.
    How can C code...
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    14,807

    Closed: Re: understanding PCI express root complex

    i am not sure, if i understood it correct. a pcie switch is a fpga or mcu?
    or it is an IC and its registers should be configured by root complex?
  12. Replies
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    Closed: Re: understanding PCI express root complex

    Hi srizbf,

    ich like to ask something about Switch. does it should be programmed? is it an fpga or cpu?
    thanks

    - - - Updated - - -

    i meant, should it be programmed or just registers should...
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    14,807

    Closed: Re: understanding PCI express root complex

    thank you srizbf,
    is root complex integriert into the CPU or there has to be an external chip except CPU?
    greetings
  14. Replies
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    14,807

    Closed: Re: understanding PCI express root complex

    Hi Srizbf,

    thanks for your answer, nice to see someone know about topic.
    in which case i may not use root complex and do work only with switch?
    driver programming should be done on CPU or on...
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    14,807

    Closed: Re: understanding PCI express root complex

    thank you for your answer, this book is actually around 1000 pages, and only demo version is available which is 222 pages. I doubt my questions are in these 222 pages :/. I will try to find out in...
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    14,807

    Closed: Understanding PCI express root complex

    Hi everyone,

    I try to understand PCI express since hours. Can anyone help me understand some points.

    - Do i have to use root complex? In which cases it is fine not to use root complex?

    -...
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    Closed: Flyback Transformer design

    Hi,

    i need to make flyback converter, i used online program of STmicroelectronics for it.
    But transformer design part wasnt clear to me.
    -i couldnt see EE60 in farnell, i guess i will use twice...
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    Closed: Re: 230VAC - 5V, 7.5V and 12V DC conversion

    hi BradtheRad ,
    should i use a second transformer for inductive load, did u mean that?
    or can i use same 15VDC for,
    voltage regulator of normal load and voltage regulator of sudden changing load?...
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    Closed: Re: 230VAC - 5V, 7.5V and 12V DC conversion

    thank you FvM,
    would you use suggest me, linear or switching voltage regulator?
    i am thinking to use get 15VDC to 12V voltage regulator and 7.5V voltage regulator. and after 12 i am thinking to add...
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    Closed: Re: 230VAC - 5V, 7.5V and 12V DC conversion

    thank you for answers. There is something else confuses me,
    there is some IC like L6566B, it takes so high DC as input, wouldnt it be so hot, because input is 230VDC then. Why they didnt use...
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    Closed: 230VAC - 5V, 7.5V and 12V DC conversion

    Hi all,

    i need to make a power supply, with 3 DC output
    5 V, will need max 0.56A,
    7.5V, will need 2A (stepmotors)
    12V will need 1A
    i guess switching voltage regulators will be better.
    i...
  22. Closed: Re: 230VAC input protection against to reverse connection

    i made this circuit to control amplitude of selonoid with microcontroller.
    i meant, in case someone give power in other direction(Neutral instead of Phase und Phase instead of Neutral).
    what...
  23. Closed: 230VAC input protection against to reverse connection

    Hi all,

    i have a circuit for AC load. Does anyone know, how can i protect circuit and let it work normally.
    if user put power socket in reverse direction. if phase and neutral change places.

    i...
  24. Closed: Re: how to limit current to max 0.6A when voltage 230VAC, for inductive load,

    Thnk you Frank,

    0.6A will be max current.
    it will change with coming data of sensor.
    it will start like ~0.5A then will go to zero in seconds.
    (without DAC i thought to do it)
    i thought to...
  25. Closed: Re: how to limit current to max 0.6A when voltage 230VAC, for inductive load,

    thanks your answer.

    i need to control output with microcontrol with respect to sensor data.

    I have also other question.
    i have inductive load, i dont know inductance of it. when i measure...
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