vocalfusion-rpi-setup/setup.sh

vocalfusion-rpi-setup/setup.sh

#!/usr/bin/env bash
pushd "$( dirname "${BASH_SOURCE[0]}" )" > /dev/null
RPI_SETUP_DIR="$( pwd )"

# Disable the built-in audio output so there is only one audio
# device in the system
sudo sed -i -e 's/^dtparam=audio=on/#dtparam=audio=on/' /boot/config.txt

# Enable the i2s device tree
sudo sed -i -e 's/#dtparam=i2s=on/dtparam=i2s=on/' /boot/config.txt

# Enable the I2C device tree
sudo raspi-config nonint do_i2c 1
sudo raspi-config nonint do_i2c 0

# Set the I2C baudrate to 100k
sudo sed -i -e '/^dtparam=i2c_arm_baudrate/d' /boot/config.txt
sudo sed -i -e 's/dtparam=i2c_arm=on$/dtparam=i2c_arm=on\ndtparam=i2c_arm_baudrate=100000/' /boot/config.txt

# Enable the SPI support
sudo raspi-config nonint do_spi 1
sudo raspi-config nonint do_spi 0

echo "Installing Raspberry Pi kernel headers"
sudo apt-get install -y raspberrypi-kernel-headers

echo "Installing the Python3 packages and related libs"
sudo apt-get install -y python3-matplotlib
sudo apt-get install -y python3-numpy
sudo apt-get install -y libatlas-base-dev

echo  "Installing necessary packages for dev kit"
sudo apt-get install -y libusb-1.0-0-dev libreadline-dev libncurses-dev

# Build I2S kernel module
PI_MODEL=$(cat /proc/device-tree/model | awk '{print $3}')
RPI4B_FLAG=""
if [ $PI_MODEL == "4" ] ; then
    RPI4B_FLAG="-DRPI_4B"
fi

if [ $# -ge 1 ] && [ $1 = "xvf3510" ] ; then
    pushd $RPI_SETUP_DIR/loader/i2s_master > /dev/null
    I2S_MASTER_FLAG="-DI2S_MASTER"
else
    pushd $RPI_SETUP_DIR/loader/i2s_slave > /dev/null
    I2S_MASTER_FLAG=""
fi
CMD="make CFLAGS_MODULE='$I2S_MASTER_FLAG $RPI4B_FLAG'"
echo $CMD
eval $CMD
if [ $? -ne 0 ]; then
    echo "Error: I2S kernel module build failed"
    exit 1
fi

popd > /dev/null

# Move existing files to back up
if [ -e ~/.asoundrc ] ; then
    chmod a+w ~/.asoundrc
    cp ~/.asoundrc ~/.asoundrc.bak
fi
if [ -e /usr/share/alsa/pulse-alsa.conf ] ; then
    sudo mv /usr/share/alsa/pulse-alsa.conf  /usr/share/alsa/pulse-alsa.conf.bak
    sudo mv ~/.config/lxpanel/LXDE-pi/panels/panel ~/.config/lxpanel/LXDE-pi/panels/panel.bak
fi

# Check args for asoundrc selection. Default to VF Stereo.
if [ $# -eq 1 ] && [ $1 = "vocalfusion" ] ; then
    cp $RPI_SETUP_DIR/resources/asoundrc_vf ~/.asoundrc
elif [ $# -ge 1 ] && [ $1 = "xvf3510" ] ; then
    cp $RPI_SETUP_DIR/resources/asoundrc_vf_xvf3510 ~/.asoundrc
else
    cp $RPI_SETUP_DIR/resources/asoundrc_vf_stereo ~/.asoundrc
fi

cp $RPI_SETUP_DIR/resources/panel ~/.config/lxpanel/LXDE-pi/panels/panel

# Make the asoundrc file read-only otherwise lxpanel rewrites it
# as it doesn't support anything but a hardware type device
chmod a-w ~/.asoundrc

# Apply changes
sudo /etc/init.d/alsa-utils restart

# Create the script to run after each reboot and make the soundcard available
i2s_driver_script=$RPI_SETUP_DIR/resources/load_i2s_driver.sh
rm -f $i2s_driver_script
echo "cd $RPI_SETUP_DIR"    >> $i2s_driver_script

# Sometimes with Buster on RPi3 the SYNC bit in the I2S_CS_A_REG register is not set before the drivers are loaded
# According to section 8.8 of https://cs140e.sergio.bz/docs/BCM2837-ARM-Peripherals.pdf
# this bit is set after 2 PCM clocks have occurred.
# To avoid this issue we add a 1-second delay before the drivers are loaded
echo "sleep 1"  >> $i2s_driver_script

if [ $# -ge 1 ] && [ $1 = "xvf3510" ] ; then
    echo "sudo insmod loader/i2s_master/i2s_master_loader.ko"  >> $i2s_driver_script
else
    echo "sudo insmod loader/i2s_slave/i2s_slave_loader.ko"   >> $i2s_driver_script
fi

echo "# Run Alsa at startup so that alsamixer configures"   >> $i2s_driver_script    
echo "arecord -d 1 > /dev/null 2>&1"                        >> $i2s_driver_script    
echo "aplay dummy > /dev/null 2>&1"                         >> $i2s_driver_script

if [ $# -ge 1 ] && [ $1 = "xvf3510" ] ; then
    pushd $RPI_SETUP_DIR/resources/clk_dac_setup/ > /dev/null
    make
    popd > /dev/null
    i2s_clk_dac_script=$RPI_SETUP_DIR/resources/init_i2s_clks.sh
    rm -f $i2s_clk_dac_script
    echo "sudo $RPI_SETUP_DIR/resources/clk_dac_setup/setup_mclk"           >> $i2s_clk_dac_script
    echo "sudo $RPI_SETUP_DIR/resources/clk_dac_setup/setup_bclk"           >> $i2s_clk_dac_script
    echo "python $RPI_SETUP_DIR/resources/clk_dac_setup/setup_dac.py"       >> $i2s_clk_dac_script
    echo "python $RPI_SETUP_DIR/resources/clk_dac_setup/reset_xvf3510.py"   >> $i2s_clk_dac_script
fi

if [ $# -ge 1 ] && [ $1 = "xvf3510" ] ; then
    sudo apt-get install -y audacity
    audacity_script=$RPI_SETUP_DIR/resources/run_audacity.sh
    rm -f $audacity_script
    echo "#!/usr/bin/env bash" >> $audacity_script
    echo "/usr/bin/audacity &" >> $audacity_script
    echo "sleep 5" >> $audacity_script
    echo "sudo $RPI_SETUP_DIR/resources/clk_dac_setup/setup_bclk >> /dev/null"  >> $audacity_script
    sudo chmod +x $audacity_script
    sudo mv $audacity_script /usr/local/bin/audacity
fi

# Setup the crontab to restart I2S at reboot
rm -f $RPI_SETUP_DIR/resources/crontab
echo "@reboot sh $i2s_driver_script"    >> $RPI_SETUP_DIR/resources/crontab
if [ $# -ge 1 ] && [ $1 = "xvf3510" ] ; then
    echo "@reboot sh $i2s_clk_dac_script"   >> $RPI_SETUP_DIR/resources/crontab
fi
crontab $RPI_SETUP_DIR/resources/crontab

echo "To enable I2S, I2C and SPI, this Raspberry Pi must be rebooted."

popd > /dev/null