Tag Archives: Papilio One

I2S Receiver With A Wishbone Interface For The ZPUino

The I2S bus was introduced by Philips Semiconductor in 1986. Its purpose is to provide a simple serial interface capable of transferring digital audio data between integrated circuits so, when I needed a way to transfer data between a Teensy microcontroller and my Papilio One FPGA board, an I2S receiver was a natural choice. I …

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Adapting Wishbone Cores For Use With The Papilio And DesignLab

After a hiatus of about a year I’ve pulled out my Papilio One FPGA board and started working on my VHDL programming skills again. The majority of my previous efforts involved putting together Wishbone cores for the ZPUino softcore and I thought I’d pick up where I left off. However, since I last spent any …

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A PKS31 Beacon In An FPGA

Back in January 2012 I described a technique for producing PSK31 signals that requires no multiplications or explicit wave shaping. It was based upon viewing the PSK signal not as a single modulated waveform but as as the sum of two unmodulated waveforms whose individual frequencies depend upon whether you are transmitting a one or …

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A blog about RTL-SDR (RTL2832) and cheap software defined radio

DuWayne's Place

Computers, Electronics, and Amateur Radio from KC3XM

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Computers, Electronics, and Amateur Radio from KC3XM