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Recent content by Papabravo

  1. Papabravo

    Data is not transferring to Data register of SPI in MG32F157VCT6

    Is the pin configuration for the pin SCLK is used for correct. With multi-function pins on many processors this can be a convoluted process to decode and implement.
  2. Papabravo

    Data is not transferring to Data register of SPI in MG32F157VCT6

    If that is the case, it might explain why MG32F157VCT6 is not generating SCLK. SPI is not a request response kind of exchange. Whenever data is sent, data is also received on the same clock pulses. The received data is whatever the peripheral device has available when a transmission begins...
  3. Papabravo

    how can we detect a stack overflow

    The problem is overhead. There is no hardware mechanism for detecting this condition. For every stack access, you need to check that the SP (Stack Pointer) register is within limits before and after the operation. This will also detect underflow which is equally undesirable. I've spent half a...
  4. Papabravo

    FSK SER on the same symbols

    Without a schematic I can't tell you precisely what I am talking about. Any analog receiver chip will have specifications related to thresholds for various signal states. When signal levels are degraded for whatever reason the reliable detection of signals also decreases. At some point reliable...
  5. Papabravo

    FSK SER on the same symbols

    You should try to correlate your received levels with the receiver threshold. Changing the antenna may have lifted the received levels enough above the threshold to make the reception more reliable.
  6. Papabravo

    C Program Memory Layout in Embedded Systems

    There may be similarities in the layouts, but each hardware architecture will have unique features. For example, some devices begin execution at a low address while others use a high address. There are even examples of beginning addresses the are in between low and high. The operation of stack...
  7. Papabravo

    going out on a limb and praying the schematic is correct

    And, how are those prayers for the schematic being correct working out for you?
  8. Papabravo

    help please

    I'm sorry I must have missed the part of your post where you described both of the things you want.
  9. Papabravo

    LTSpice initial conditions help, please?

    What would you be willing to pay for certified and verified models? I'll wager large sums it would not be enough to compensate those who do the work. That's probably the main reason there is no such thing.
  10. Papabravo

    LTSpice initial conditions help, please?

    IMHO the main value of simulation is understanding. In addition, it is a poor workman that faults his tools.
  11. Papabravo

    help please

    What addition are you struggling to make. It's not evident from what you've posted so far.
  12. Papabravo

    LTSpice initial conditions help, please?

    It is true that I have expended considerable effort on simulation after years of building things only to toss them in a corner. It is way more cost effective this way. You probably don't want to know what we call people that give up too easily.
  13. Papabravo

    LTSpice initial conditions help, please?

    The other strategy is to ramp up the input voltage using the PULSE specification with a "long" Ton and a single cycle. OR use a PWL (piecewise linear specification, that way you don't introduce a virtual step function with a VERY large dV/dt. e.g. .param OneYear = 60*60*24*365 OR You could...
  14. Papabravo

    Computer power supply design

    IMHO, a rating is probaly for the supply as a whole.
  15. Papabravo

    can a AT89C51 be used as a rom?

    You can't tell it what address you want to get data from so there would be no way to get data from the particular address you want.

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