Connect FTDI SPI with ICE40 FPGA

For bitstream configuration and SPI interface to PC

circuit4u
5 min readMay 29, 2023

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The open source toolchain for ICE40 FPGA works exceptionally well. For example, APIO (link) combines synthesis, simulation and programmer into one easy-to-use CLI, which makes ICE40 FPGAs fun to play with, in strong contrast to bulky, snail-slow Xilinx FPGA toolchains.

1. FTDI SPI Bitstream to Flash Chip

Because of the free ICE40 open source toolchain, many low-price development board has spun up around ICE40 FPGAs…

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circuit4u

memento of electronics and fun exploration for my future self