Connect an ADC0804 to the FPGA DE2 board

Discussion in 'Embedded Systems and Microcontrollers' started by maerle, Apr 4, 2014.

  1. maerle

    Thread Starter New Member

    Apr 3, 2014
    2
    0
    I would like to make a communication with an analog digital converter (ADC0804) with the FPGA to collect a voltage that varies from 0 to 5V. I tried to search in the web but I still have no idea of what is required to put between them. (maybe just wires into the GPIO?)

    The input will be an operational amplifier with R2 being a thermal resistor. (Attachment)
    (I will edit the configuration to get a positive output from there. That`s not the deal right now)

    Any help or even any document to read more about is a big help to open my mind. Thank you.
     
    Last edited: Apr 4, 2014
  2. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    Page 2 shows how to connect a device to the ADC, is this not what you are looking for?

    Instead of the microprocessor, you have the FPGA...
     
  3. maerle

    Thread Starter New Member

    Apr 3, 2014
    2
    0
    Hoping you are right I attached my new next steps.

    However, I still don't know where to put 'chip select', 'read', 'write' and 'interrupt' terminals.

    Also, I am not right about my clock R and clock in terminals. (and afraid to damage the board).
     
  4. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    It looks like you are trying to use an I/O expander with a FPGA...why?:confused:

    Why can't you just connect it to the FPGA and drive the signals as necessary?
     
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