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Raspberry-Pi-Installer-Scripts
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Raspberry-Pi-Installer-Scripts/i2samp.sh

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#!/bin/bash
: <<'DISCLAIMER'
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
This script is licensed under the terms of the MIT license.
Unless otherwise noted, code reproduced herein
was written for this script.
- The Pimoroni Crew - (modified by Adafruit!)
DISCLAIMER
# script control variables
productname="i2s amplifier" # the name of the product to install
scriptname="i2samp" # the name of this script
spacereq=1 # minimum size required on root partition in MB
debugmode="no" # whether the script should use debug routines
debuguser="none" # optional test git user to use in debug mode
debugpoint="none" # optional git repo branch or tag to checkout
forcesudo="no" # whether the script requires to be ran with root privileges
promptreboot="no" # whether the script should always prompt user to reboot
mininstall="no" # whether the script enforces minimum install routine
customcmd="yes" # whether to execute commands specified before exit
armhfonly="yes" # whether the script is allowed to run on other arch
armv6="yes" # whether armv6 processors are supported
armv7="yes" # whether armv7 processors are supported
armv8="yes" # whether armv8 processors are supported
raspbianonly="no" # whether the script is allowed to run on other OSes
osreleases=( "Raspbian" ) # list os-releases supported
oswarning=( "Debian" "Kano" "Mate" "PiTop" "Ubuntu" ) # list experimental os-releases
osdeny=( "Darwin" "Kali" ) # list os-releases specifically disallowed
FORCE=$1
DEVICE_TREE=true
ASK_TO_REBOOT=false
CURRENT_SETTING=false
UPDATE_DB=false
BOOTCMD=/boot/cmdline.txt
CONFIG=/boot/config.txt
APTSRC=/etc/apt/sources.list
INITABCONF=/etc/inittab
BLACKLIST=/etc/modprobe.d/raspi-blacklist.conf
LOADMOD=/etc/modules
DTBODIR=/boot/overlays
# function define
confirm() {
if [ "$FORCE" == '-y' ]; then
true
else
read -r -p "$1 [y/N] " response < /dev/tty
if [[ $response =~ ^(yes|y|Y)$ ]]; then
true
else
false
fi
fi
}
prompt() {
read -r -p "$1 [y/N] " response < /dev/tty
if [[ $response =~ ^(yes|y|Y)$ ]]; then
true
else
false
fi
}
success() {
echo -e "$(tput setaf 2)$1$(tput sgr0)"
}
inform() {
echo -e "$(tput setaf 6)$1$(tput sgr0)"
}
warning() {
echo -e "$(tput setaf 1)$1$(tput sgr0)"
}
newline() {
echo ""
}
progress() {
count=0
until [ $count -eq $1 ]; do
echo -n "..." && sleep 1
((count++))
done
echo
}
sudocheck() {
if [ $(id -u) -ne 0 ]; then
echo -e "Install must be run as root. Try 'sudo ./$scriptname'\n"
exit 1
fi
}
sysclean() {
sudo apt-get clean && sudo apt-get autoclean
sudo apt-get -y autoremove &> /dev/null
}
sysupdate() {
if ! $UPDATE_DB; then
echo "Updating apt indexes..." && progress 3 &
sudo apt-get update 1> /dev/null || { warning "Apt failed to update indexes!" && exit 1; }
echo "Reading package lists..."
progress 3 && UPDATE_DB=true
fi
}
sysupgrade() {
sudo apt-get upgrade
sudo apt-get clean && sudo apt-get autoclean
sudo apt-get -y autoremove &> /dev/null
}
sysreboot() {
warning "Some changes made to your system require"
warning "your computer to reboot to take effect."
newline
if prompt "Would you like to reboot now?"; then
sync && sudo reboot
fi
}
arch_check() {
IS_ARMHF=false
IS_ARMv6=false
if uname -m | grep "armv.l" > /dev/null; then
IS_ARMHF=true
if uname -m | grep "armv6l" > /dev/null; then
IS_ARMv6=true
fi
fi
}
os_check() {
IS_RASPBIAN=false
IS_MACOSX=false
IS_SUPPORTED=false
IS_EXPERIMENTAL=false
if [ -f /etc/os-release ]; then
if cat /etc/os-release | grep "Raspbian" > /dev/null; then
IS_RASPBIAN=true && IS_SUPPORTED=true
fi
if command -v apt-get > /dev/null; then
for os in ${osreleases[@]}; do
if cat /etc/os-release | grep $os > /dev/null; then
IS_SUPPORTED=true && IS_EXPERIMENTAL=false
fi
done
for os in ${oswarning[@]}; do
if cat /etc/os-release | grep $os > /dev/null; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=true
fi
done
for os in ${osdeny[@]}; do
if cat /etc/os-release | grep $os > /dev/null; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=false
fi
done
fi
fi
if [ -d ~/.kano-settings ] || [ -d ~/.kanoprofile ]; then
IS_RASPBIAN=false
for os in ${oswarning[@]}; do
if [ $os == "Kano" ]; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=true
fi
done
for os in ${osdeny[@]}; do
if [ $os == "Kano" ]; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=false
fi
done
fi
if [ -f ~/.pt-dashboard-config ] || [ -d ~/.pt-dashboard ] || [ -d ~/.pt-os-dashboard ]; then
IS_RASPBIAN=false
for os in ${oswarning[@]}; do
if [ $os == "PiTop" ]; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=true
fi
done
for os in ${osdeny[@]}; do
if [ $os == "PiTop" ]; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=false
fi
done
fi
if [ -d ~/.config/ubuntu-mate ]; then
for os in ${osdeny[@]}; do
if [ $os == "Mate" ]; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=false
fi
done
fi
if uname -s | grep "Darwin" > /dev/null; then
IS_MACOSX=true
for os in ${osdeny[@]}; do
if [ $os == "Darwin" ]; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=false
fi
done
fi
}
raspbian_check() {
IS_SUPPORTED=false
IS_EXPERIMENTAL=false
if [ -f /etc/os-release ]; then
if cat /etc/os-release | grep "/sid" > /dev/null; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=true
elif cat /etc/os-release | grep "buster" > /dev/null; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=true
elif cat /etc/os-release | grep "stretch" > /dev/null; then
IS_SUPPORTED=false && IS_EXPERIMENTAL=true
elif cat /etc/os-release | grep "jessie" > /dev/null; then
IS_SUPPORTED=true && IS_EXPERIMENTAL=false
elif cat /etc/os-release | grep "wheezy" > /dev/null; then
IS_SUPPORTED=true && IS_EXPERIMENTAL=false
else
IS_SUPPORTED=false && IS_EXPERIMENTAL=false
fi
fi
}
: <<'MAINSTART'
Perform all global variables declarations as well as function definition
above this section for clarity, thanks!
MAINSTART
# checks and init
arch_check
os_check
if [ $debugmode != "no" ]; then
echo "USER_HOME is $USER_HOME" && newline
echo "IS_RASPBIAN is $IS_RASPBIAN"
echo "IS_MACOSX is $IS_MACOSX"
echo "IS_SUPPORTED is $IS_SUPPORTED"
echo "IS_EXPERIMENTAL is $IS_EXPERIMENTAL"
newline
fi
if ! $IS_ARMHF; then
warning "This hardware is not supported, sorry!"
warning "Config files have been left untouched"
newline && exit 1
fi
if $IS_ARMv8 && [ $armv8 == "no" ]; then
warning "Sorry, your CPU is not supported by this installer"
newline && exit 1
elif $IS_ARMv7 && [ $armv7 == "no" ]; then
warning "Sorry, your CPU is not supported by this installer"
newline && exit 1
elif $IS_ARMv6 && [ $armv6 == "no" ]; then
warning "Sorry, your CPU is not supported by this installer"
newline && exit 1
fi
if [ $raspbianonly == "yes" ] && ! $IS_RASPBIAN;then
warning "This script is intended for Raspbian on a Raspberry Pi!"
newline && exit 1
fi
if $IS_RASPBIAN; then
raspbian_check
if ! $IS_SUPPORTED && ! $IS_EXPERIMENTAL; then
newline && warning "--- Warning ---" && newline
echo "The $productname installer"
echo "does not work on this version of Raspbian."
echo "Check https://github.com/$gitusername/$gitreponame"
echo "for additional information and support"
newline && exit 1
fi
fi
if ! $IS_SUPPORTED && ! $IS_EXPERIMENTAL; then
warning "Your operating system is not supported, sorry!"
newline && exit 1
fi
if $IS_EXPERIMENTAL; then
warning "Support for your operating system is experimental. Please visit"
warning "forums.adafruit.com if you experience issues with this product."
newline
fi
if [ $forcesudo == "yes" ]; then
sudocheck
fi
newline
echo "This script will install everything needed to use"
echo "$productname"
newline
warning "--- Warning ---"
newline
echo "Always be careful when running scripts and commands"
echo "copied from the internet. Ensure they are from a"
echo "trusted source."
newline
echo "If you want to see what this script does before"
echo "running it, you should run:"
echo " \curl -sS github.com/adafruit/Raspberry-Pi-Installer-Scripts/$scriptname"
newline
if confirm "Do you wish to continue?"; then
newline
echo "Checking hardware requirements..."
if [ -e $CONFIG ] && grep -q "^device_tree=$" $CONFIG; then
DEVICE_TREE=false
fi
if $DEVICE_TREE; then
newline
echo "Adding Device Tree Entry to $CONFIG"
if [ -e $CONFIG ] && grep -q "^dtoverlay=hifiberry-dac$" $CONFIG; then
echo "dtoverlay already active"
else
echo "dtoverlay=hifiberry-dac" | sudo tee -a $CONFIG
ASK_TO_REBOOT=true
fi
if [ -e $CONFIG ] && grep -q "^dtoverlay=i2s-mmap$" $CONFIG; then
echo "i2s mmap dtoverlay already active"
else
echo "dtoverlay=i2s-mmap" | sudo tee -a $CONFIG
ASK_TO_REBOOT=true
fi
if [ -e $BLACKLIST ]; then
newline
echo "Commenting out Blacklist entry in "
echo "$BLACKLIST"
sudo sed -i -e "s|^blacklist[[:space:]]*i2c-bcm2708.*|#blacklist i2c-bcm2708|" \
-e "s|^blacklist[[:space:]]*snd-soc-pcm512x.*|#blacklist snd-soc-pcm512x|" \
-e "s|^blacklist[[:space:]]*snd-soc-wm8804.*|#blacklist snd-soc-wm8804|" $BLACKLIST &> /dev/null
fi
else
newline
echo "No Device Tree Detected, not supported"
newline
exit 1
fi
if [ -e $CONFIG ] && grep -q -E "^dtparam=audio=on$" $CONFIG; then
bcm2835off="no"
newline
echo "Disabling default sound driver"
sudo sed -i "s|^dtparam=audio=on$|#dtparam=audio=on|" $CONFIG &> /dev/null
if [ -e $LOADMOD ] && grep -q "^snd-bcm2835" $LOADMOD; then
sudo sed -i "s|^snd-bcm2835|#snd-bcm2835|" $LOADMOD &> /dev/null
fi
ASK_TO_REBOOT=true
elif [ -e $LOADMOD ] && grep -q "^snd-bcm2835" $LOADMOD; then
bcm2835off="no"
newline
echo "Disabling default sound module"
sudo sed -i "s|^snd-bcm2835|#snd-bcm2835|" $LOADMOD &> /dev/null
ASK_TO_REBOOT=true
else
newline
echo "Default sound driver currently not loaded"
bcm2835off="yes"
fi
echo "Configuring sound output"
if [ -e /etc/asound.conf ]; then
if [ -e /etc/asound.conf.old ]; then
sudo rm -f /etc/asound.conf.old
fi
sudo mv /etc/asound.conf /etc/asound.conf.old
fi
cat > ~/asound.conf << 'EOL'
pcm.speakerbonnet {
type hw card 0
}
pcm.dmixer {
type dmix
ipc_key 1024
ipc_perm 0666
slave {
pcm "speakerbonnet"
period_time 0
period_size 1024
buffer_size 8192
rate 44100
channels 2
}
}
ctl.dmixer {
type hw card 0
}
pcm.softvol {
type softvol
slave.pcm "dmixer"
control.name "PCM"
control.card 0
}
ctl.softvol {
type hw card 0
}
pcm.!default {
type plug
slave.pcm "softvol"
}
EOL
sudo mv ~/asound.conf /etc/asound.conf
newline
echo "Installing aplay systemd unit"
sudo sh -c 'cat > /etc/systemd/system/aplay.service' << 'EOL'
[Unit]
Description=Invoke aplay from /dev/zero at system start.
[Service]
ExecStart=/usr/bin/aplay -D default -t raw -r 44100 -c 2 -f S16_LE /dev/zero
[Install]
WantedBy=multi-user.target
EOL
sudo systemctl daemon-reload
sudo systemctl disable aplay
newline
echo "You can optionally activate '/dev/zero' playback in"
echo "the background at boot. This will remove all"
echo "popping/clicking but does use some processor time."
newline
if confirm "Activate '/dev/zero' playback in background? [RECOMMENDED]"; then
newline
sudo systemctl enable aplay
ASK_TO_REBOOT=true
fi
if [ $bcm2835off == "yes" ]; then
newline
echo "We can now test your $productname"
warning "Set your speakers at a low volume if possible!"
if confirm "Do you wish to test your system now?"; then
echo "Testing..."
speaker-test -l5 -c2 -t wav
fi
fi
newline
success "All done!"
newline
echo "Enjoy your new $productname!"
newline
if [ $promptreboot == "yes" ] || $ASK_TO_REBOOT; then
sysreboot
fi
else
newline
echo "Aborting..."
newline
fi
exit 0