• Lattice: up5k. Onboard RAM for 64k points saves.
• Onboard flash : W25X10CLSNIG
• Pulser : HV7361GA-G: adaptable to -100V pulses. Onboard is 5V pulse.
• AD8331 for gain
• ADC: AD9629BCPZ-65: 12bits, reaching 64Msps here
• DAC: MCP4812-E/MS for 8us gain segments

• Hardware files. Stemming from the forkable upverter design.
• Utilities to program the up5k: no FTDI, all through the RPi header, using its SPI bus to program either the board flash, or the fpga directy.
• The python tools: to facilitate the acquisitions.
• The cursed gateware: for the current gateware linked to the python library.

An example from the py_fpga folder, summarized. Check the visualisation of the acquisitions below.

# Setting the fpga buses
fpga = py_fpga(i2c_bus=i2c_bus, py_audio=p, spi_bus=spi)

# Setting the 
fpga.set_waveform(pdelay=1, PHV_time=11, PnHV_time=1, PDamp_time=100)

# Setting the gain values
hiloVal = 1 # High or low.
dacVal = 250 # on a range from 0 to 512
fpga.set_HILO(hiloVal)
fpga.set_dac(dacVal)

# Setting the VGA
startVal,nPtsDAC = 250, 16
for i in range(nPtsDAC):
	fpga.set_dac(int(startVal   (i*(455-startVal))/nPtsDAC), mem=i)

# Reading 10 successive acquisitions
dataI2S = fpga.read_fft_through_i2s(10)

# Getting the detailed buffer (8192pts at 64msps)
dataSPI = fpga.read_signal_through_spi()

# "Manually" calculating the FFT and reading it
fpga.calc_fft() 
time.sleep(3/1000.0) # normally takes ~800us to compute 8192pts
dataFFT = fpga.read_fft_through_spi()

This work is based on two previous TAPR projects, the echOmods project, and the un0rick project - its boards are open hardware and software, developped with open-source elements as much as possible.

Copyright Kelu124 ([email protected]) 2020.

• The hardware is licensed under TAPR Open Hardware License (www.tapr.org/OHL)
• The software components are free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
• The documentation is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

This project is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE.