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Papilio One: 4 bit binary counter

Shane Ormonde9 years ago8 months ago04 mins

FPGA implementation of a 4 bit binary counter. Hardware was described using VHDL. The Papilio One comes with a 32 MHz clock but this was divided down to 0.5Hz so you could actually see the counter counting. VHDL code: The LEDs were just thrown on a bit a stripboard like so (with 0805 resistors soldered…

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  • FPGA
  • Papilio One

Papilio One : Flashing an LED at a specific frequency

Shane Ormonde9 years ago9 years ago03 mins

To flash an LED at a specific frequency we need to divide the input clock frequency. In VHDL this can be done using counters. The Papilio One FPGA board comes with a 32MHz oscillator. 32Mhz means 32 million pulses per second, if you wanted to divide this down to 1Hz you could just set an…

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  • FPGA
  • Papilio One

Papilio One FPGA board , using a switch to turn on an LED

Shane Ormonde10 years ago8 months ago01 mins

Put this together just to start learning a bit about VHDL coding. The logic is simple, if input P4 (the switch) is low, output P3 (the LED) is high, and vice versa. The circuit diagram is shown below:

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  • FPGA
  • Papilio One

Flashing an LED using a Papilio One FPGA development board

Shane Ormonde10 years ago8 months ago11 mins

It took three hours of hardship to get this far. Documenting the process to save my future self / someone else going through this simple but convoluted process.

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  1. wattnotions on Messing about with trilaterationSeptember 27, 2023

    Not unnecessarily complicated enough :D

  2. Mikhail Grushinskiy on Messing about with trilaterationSeptember 26, 2023

    Why don’t you just use GPS with 2 cm accuracy which is achievable with RTKLib?

  3. Maria on Low power magnetic hold and release mechanismAugust 25, 2023

    From where i can read out more about it. Do you have any suggestive readings?

  4. Mikhail Grushinskiy on OpenWave – take 2May 28, 2023

    You would also need fast Fourier transform to find out waves frequently to use it as reference point to give…

  5. Mikhail Grushinskiy on OpenWave – take 2May 28, 2023

    You would need wind sensor real-time data. You would need to tilt compensate wind data from real time IMU data.…

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