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Ask an Expert Forum Ethernet Shield Heat-up Issue - Need Help
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Ethernet Shield Heat-up Issue - Need Help

ramguna84
ramguna84 over 10 years ago

Sir,

 

We interfaced Ethernet Shield with PSoC4 Pioneer Kit and executes the Project#31 example code (after following the mentioned guidelines). The observations are:

1. Connected USB cable to PSoC4 Board for Power both boards (PSoC and Shield): We were unable to ping with IP address.

2. Connected 12VDC (1mA) adapter to Shield for power both boards: We were able to PING with Shield and run the program (LED blinks on network command (Only once)). But....boards were heated-up. After some time we unplug the power and re-tried the same but we were able to only PING and got the web page; not the LED blink response. We repeated the same but the observation is same.

 

Please suggest us to sort out the heating issue and get the consistent response.

Suggest us the ways to power-up the boards.

 

Regards,

SG Ramanathan - MTech Student

National Institute of Technology (NIT) Calicut

Kerala

India

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  • mudz
    0 mudz over 10 years ago

    Greetings,

    How did you powered both kits? As I can see in manual both kits operating voltage is 5v, so how did you powered it with 12v(1A????).
    It is possible that your led's might be burned up due to excess of voltage and also that explains heating issue ! But again if this is the case how is your board still working(as you mentioned you can ping it).

    Power it using any 5VDC supply or you can use 5v voltage regulator like LM7805(LM317 also). It can easily convert 12v (1A) to 5v regulated supply.

    Good Luck image

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  • ramguna84
    0 ramguna84 over 10 years ago in reply to mudz

    Sir,

     

    Thanks for quick response. I will try it with 5VDC and get back to you.

     

    For sack of clarity on last question; component used and how we connected are detailed and attached for your reference which may help for your investigate and help us in positive direction. Please refer the attachment.

    After two modes of powering (USB and 12VDC) then we tried our simple LED blink program for LED check (only with PSoC4 ) It works. No burned of LED.

     

    Please suggest.

    Attachments:
    imageSupportive document.pdf
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  • mudz
    0 mudz over 10 years ago in reply to ramguna84

    As I don't have these boards so I can only help you debug your problem by my experience with other boards and looking at the manuals. By looking at your reference pin connection image I can't suggest anything, as all connections are wrong, please take a look.
    Let's check few things:

    1> Remove every cable or power from both boards.
    2> Power your PSoC4 Board using usb.

    3> Check 5v and 3v power levels on your board.
    4> If both are correct then power your Ethernet shield using PSoC4 5v supply(connect it to 5v pin of Ethernet Shield) and ground pin.(use Jumper Wires or simple wires only).

    5> Now check the power on Ethernet Board. (both 5v and 3,3 volt).

    6> If it's Fine then connect your Ethernet cable.

    7> Now again check all power levels.

    8> If its working fine then try reprogramming the board one more time.

     

    Note: Use jumper wires for connections, Do not connect Ethernet Shield directly on PSoc board.

    Try these steps and post the result.

     

    Good Luck !

     

    ------------------------------------------------------------------Updated-------------------------------------------------------------------------

    As Robert Peter Oakes fine eyes caught the main problem, you should be probably looking at these two links :
    1.> Arduino - ArduinoBoardEthernet

    2.> Arduino - ArduinoEthernetShield

    There is difference between two Boards and your board is seems to be the first one i.e Arduino - ArduinoBoardEthernet . So program it accordingly!!!

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  • Robert Peter Oakes
    0 Robert Peter Oakes over 10 years ago in reply to ramguna84

    Looking at the board you call a Shield... IT IS NOT A SHIELD. it is a fully fledged Arduino, the little tsop chip in the top right corner is an ATMEL ATMEGA328 same as used in an UNO. This board (Arduino Ethernet) is an Arduino with a WIZNET5100 on board. The Ethernet chip on this board does get hot during use

     

    so if you connect 5V via the red board, by the time it gets to the Ethernet it will be lower than that but probably enough to still work. If you connect 12V to the top board via the barrel connector, this will work but the combined load of both boards will cause the voltage regulator (Buck regulator) to over heat probably and also if it is using the 3V3 rail to the LDO linear reg will also have a hard time.

     

    Now if you where trying to drive LEDs from the PSOC board with this Arduino Ethernet connected to it, then you will be competing with the MEGA328 IO pins and it is possible to damage one or the other boards, how did you even stack them, the Arduino Ethernet does not come with stacking headers, only header sockets (No pins on the bottom)

     

    If you want to add ethernet to the PSOC then you need the "Ethernet Shield", not an Arduino Ethernet

     

    this is an Ethernet Shield

    image

    this is what you have:-, note the MEGA328 in the top right corner

    image

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  • ramguna84
    0 ramguna84 over 10 years ago in reply to mudz

    Sir,

    The responses:

     

    1> Remove every cable or power from both boards- done.
    2> Power your PSoC4 Board using usb.-done

    3> Check 5v and 3v power levels on your board - got 5 and 3 vdc.
    4> If both are correct then power your Ethernet shield using PSoC4 5v supply(connect it to 5v pin of Ethernet Shield) and ground pin.(use Jumper Wires or simple wires only).- done

    5> Now check the the power on Ethernet Board. (both 5v and 3,3 volt). - got 5 and 3.3vdc

    6> If it's Fine then connect your Ethernet cable. - done

    7> Now again check all power levels. - same as above measurements (3.3 and 5vdc)

    8> If its working fine then try reprogramming the board one more time.- reprogrammed.

     

    But now its not pinging with Shield ethernet. Above are our observations. Looks like board is fine.

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  • mudz
    0 mudz over 10 years ago in reply to ramguna84

    Have you read the updated comment? or Robert Peter Oakes comment?

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  • ramguna84
    0 ramguna84 over 10 years ago in reply to Robert Peter Oakes

    Sir,

     

    Answering to your question:

    how did you even stack them, the Arduino Ethernet does not come with stacking headers, only header sockets (No pins on the bottom) --> We extracted the all pins in the bottom of Ethernet shield to stack on to PSoC Board and soldered those pins yesterday. Then the we observed all those as i mentioned in my 1st query.


    After all your suggestion, instead of stacking, today we connected only required pins from PSoC4 to Ethernet Shield and powered PSoC with USB and 5VDC with grnd from PSoC to Ethernet Shield and tried to ping for IP, but it doesn't ping. The tried interface diagram is attached. Please suggest whether this way of interface is OK or any modification is required. I know if i clear with interfacing of board and powering mechanism i can go ahead on porting the software. Please suggest based on your experience.


    Thanks.

    Attachments:
    imageReport#2.pdf
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  • mudz
    0 mudz over 10 years ago in reply to ramguna84

    Your Pin connections are not according to the images but I will take a look at the both boards manual. I will get back to you on how to interface it(or whether you have interfaced it correctly).
    Till then check your RJ45 cable is working fine because these cable are prone to failure on little twists or bending. Check that board and ethernet ground connections are
    Also, Have you read the manual of your Ethernet board(not Ethernet Shield) or compared the two boards?

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  • ramguna84
    0 ramguna84 over 10 years ago in reply to mudz

    Sir,

     

    I haven't read the Ethernet board manual yet, but the cable works well (that i verified). Image i shown is only for reference (not one to one pins) but we connected as per the labeling/pin numbers on boards. Once again i verify the Ethernet cable.

    Pins from PSoC board to Ethernet Shield:

    P3.4 to ETH_CS

    P3.0 to MOSI

    P3.1 to MISO

    P0.6 to SCK

    P0.7 (No connection)

    P0.0 to SD_CS

    Detect and WP --> Ignored

    Reset to Reset

    5V to 5V.

    GND to GND

     

     

     

    Thanks.  

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  • mudz
    0 mudz over 10 years ago in reply to ramguna84

    Why haven't you read the manual? It is the first thing to do before posting problems in forums. image
    I think you should read manual and try to debug it yourself first.

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