mangelajo / orangecrab-usb

USB examples for the Orangecrab FPGA board, based on FPGA-USB-Device

orangecrab examples based on FPGA-USB-Device

This repository contains two examples using the great FPGA-USB-Device by WangXuan95 for the OrangeCrab board.

Building

You can install the yosys, nextpnr-ecp5 and dfu-utils locally, or the makefile will automatically use the containers provided by https://github.com/mangelajo/fedora-hdl-containers if you have podman or docker installed in your system.

Camera example

Build with: make

you will get a .dfu file in the bin directory.

Audio example

Build with,

make -f Makefile.audio

this is an example connecting an INMP441 mems microphone to the following pins:

• gpio_sck -> i2s_mclk
• gpio_0 -> i2s_ws
• gpio_miso -> i2s_sd

Please note that the INMP441 is being oversampled by running a the I2S clock over specification, in exchange we get only 16bits instead of 24bits from the output, producing an overall better sound.