Build fxload for USB3 support

General

fxload under Debian 10 and 11 does not support USB3 (fx3) targets. A newer version of fxload needs to be compiled from source.

Instructions

• Install supporting packages

    sudo apt-get install automake libtool libudev-dev build-essential git
  

• Clone libusb

    git clone https://github.com/libusb/libusb
  

• Build libusb main

    cd libusb
  
    ./autogen.sh
    ./configure --prefix=/usr/local
    make
    
    sudo make install
  

• Build examples

    cd examples
    make
  

• Install fxload

    sudo install -o root -g root -m 755 ./.libs/fxload /usr/local/sbin
  

Manual module load

    sudo LD_LIBRARY_PATH=/usr/local/lib /usr/local/sbin/fxload -t fx3 -I /lib/firmware/qhy/QHY5III485.img -d 1618:0485

Automatic load

sudo tee /etc/udev/rules.d/99-qhy.rules <<EOF
ACTION!="add", GOTO="qhy_end"
SUBSYSTEM!="usb", GOTO="qhy_end"

ATTRS{idVendor}=="1618", ATTRS{idProduct}=="0485", RUN+="LD_LIBRARY_PATH=/usr/local/lib /usr/local/sbin/fxload -t fx3 -I /lib/firmware/qhy/QHY5III485.img -d 1618:0485"

ATTRS{idVendor}=="1618", MODE="0666"

LABEL="qhy_end"
EOF