Merge pull request #305 from makermelissa/main

Updated and converted i2samp script

i2samp.py

@@ -0,0 +1,137 @@
+import os
+
+try:
+    from adafruit_shell import Shell
+    from clint.textui import colored
+except ImportError:
+    raise RuntimeError("The library 'adafruit_shell' was not found. To install, try typing: sudo pip3 install adafruit-python-shell")
+
+shell = Shell()
+
+BLACKLIST = "/etc/modprobe.d/raspi-blacklist.conf"
+PRODUCT_NAME = "I2S Amplifier"
+
+def driver_loaded(driver_name):
+    return shell.run_command(f"lsmod | grep -q '{driver_name}'", suppress_message=True)
+
+def main():
+    reboot = False
+    shell.clear()
+    if not shell.is_raspberry_pi():
+        shell.bail("Non-Raspberry Pi board detected.")
+    print("\nThis script will install everything needed to use\n"
+        f"{PRODUCT_NAME}.\n")
+    print(colored.red("--- Warning ---"))
+    print("\nAlways be careful when running scripts and commands\n"
+        "copied from the internet. Ensure they are from a\n"
+        "trusted source.\n")
+    if not shell.prompt("Do you wish to continue?"):
+        print("\nAborting...")
+        shell.exit()
+
+    print("\nChecking hardware requirements...")
+
+    # Enable I2S overlay
+    config = "/boot/firmware/config.txt"
+    if not os.path.exists(config):
+        config = "/boot/config.txt"
+    if not os.path.exists(config):
+        shell.bail("No Device Tree Detected, not supported")
+
+    print(f"\nAdding Device Tree Entry to {config}")
+
+    if shell.pattern_search(config, "^dtoverlay=max98357a$"):
+        print("dtoverlay already active")
+    else:
+        shell.write_text_file(config, "dtoverlay=max98357a")
+        reboot = True
+
+    if os.path.exists(BLACKLIST):
+        print("\nCommenting out Blacklist entry in", BLACKLIST)
+        shell.pattern_replace(BLACKLIST, "^blacklist[[:space:]]*snd_soc_max98357a.*", "#blacklist snd_soc_max98357a")
+        shell.pattern_replace(BLACKLIST, "^blacklist[[:space:]]*snd_soc_max98357a_i2c.*", "#blacklist snd_soc_max98357a_i2c")
+        shell.pattern_replace(BLACKLIST, "^blacklist[[:space:]]*snd_soc_max98357a.*", "#blacklist snd_soc_max98357a")
+
+    print("Configuring sound output")
+    if os.path.exists("/etc/asound.conf"):
+        if os.path.exists("/etc/asound.conf.old"):
+            shell.remove("/etc/asound.conf.old")
+        shell.move("/etc/asound.conf", "/etc/asound.conf.old")
+    shell.write_text_file("~/asound.conf",
+"""
+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"
+}
+""")
+    shell.move("~/asound.conf", "/etc/asound.conf")
+
+
+    print("Installing aplay systemd unit")
+    shell.write_text_file("/etc/systemd/system/aplay.service", """
+[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""", append=False)
+
+    shell.run_command("sudo systemctl daemon-reload")
+    shell.run_command("sudo systemctl disable aplay")
+    print("\nYou can optionally activate '/dev/zero' playback in\n"
+        "the background at boot. This will remove all\n"
+        "popping/clicking but does use some processor time.\n\n")
+    if shell.prompt("Activate '/dev/zero' playback in background? [RECOMMENDED]\n", default="y"):
+        shell.run_command("sudo systemctl enable aplay")
+        reboot = True
+
+    if driver_loaded("max98357a"):
+        print(f"\nWe can now test your {PRODUCT_NAME}")
+        shell.warn("Set your speakers at a low volume if possible!")
+        if shell.prompt("Do you wish to test your system now?"):
+            print("Testing...")
+            shell.run_command("speaker-test -l5 -c2 -t wav")
+    print("\n" + colored.green("All done!"))
+    print("\nEnjoy your new $productname!")
+    if reboot:
+        shell.prompt_reboot()
+
+# Main function
+if __name__ == "__main__":
+    shell.require_root()
+    main()

i2smic.py

@@ -1,4 +1,3 @@
-import platform
 import os
 
 try: