Switch sysfs GPIO ABI to pigpiod

The sysfs GPIO ABI has been deprecated in 2015 and Raspberry Pi OS
bookworm no longer supports it.

functions.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+ensure_pigpiod() {
+  local TRIES
+  if ! which socat pigpiod pigs >/dev/null; then
+    echo Please install all of the following packages:
+    echo sudo apt install socat pigpiod pigpio-tools
+    exit 1
+  fi
+  socat OPEN:/dev/null TCP6:localhost:8888 2>/dev/null && return
+  socat OPEN:/dev/null TCP4:localhost:8888 2>/dev/null && return
+  if ! sudo systemctl start pigpiod.service; then
+    echo "Could not start pigpiod.service; please fix."
+    exit 1
+  fi
+  TRIES=15
+  while [ $TRIES -gt 0 ]; do
+    socat OPEN:/dev/null TCP6:localhost:8888,retry=1,interval=0.1 2>/dev/null && break
+    socat OPEN:/dev/null TCP4:localhost:8888,retry=1,interval=0.1 2>/dev/null && break
+    TRIES=$((TRIES - 1))
+  done
+  if [ $TRIES -eq 0 ]; then
+    echo Timed out waiting for pigpiod to start
+    exit 1
+  fi
+}

reset_ec.sh

@@ -1,13 +1,8 @@
 #!/bin/sh
 
-if [ ! -d /sys/class/gpio/gpio25 ]
-then
-    echo "25" > /sys/class/gpio/export
-fi
+. ./functions.sh
 
+ensure_pigpiod
+pigs modes 25 w write 25 0
 sleep 0.1
-echo "out" > /sys/class/gpio/gpio25/direction
-echo 0 > /sys/class/gpio/gpio25/value
-sleep 0.1
-echo 1 > /sys/class/gpio/gpio25/value
-
+pigs write 25 1

reset_soc.sh

@@ -1,13 +1,8 @@
 #!/bin/sh
 
-if [ ! -d /sys/class/gpio/gpio24 ]
-then
-    echo "24" > /sys/class/gpio/export
-fi
+. ./functions.sh
 
+ensure_pigpiod
+pigs modes 24 w write 24 0
 sleep 0.1
-echo "out" > /sys/class/gpio/gpio24/direction
-echo 0 > /sys/class/gpio/gpio24/value
-sleep 0.1
-echo 1 > /sys/class/gpio/gpio24/value
-
+pigs write 24 1

uart_fpga.sh

@@ -1,10 +1,6 @@
 #!/bin/sh
 
-if [ ! -d /sys/class/gpio/gpio18 ]
-then
-    echo "18" > /sys/class/gpio/export
-fi
+. ./functions.sh
 
-sleep 0.1
-echo "out" > /sys/class/gpio/gpio18/direction
-echo "1" > /sys/class/gpio/gpio18/value
+ensure_pigpiod
+pigs modes 18 w write 18 1

uart_up5k.sh

@@ -1,10 +1,6 @@
 #!/bin/sh
 
-if [ ! -d /sys/class/gpio/gpio18 ]
-then
-    echo "18" > /sys/class/gpio/export
-fi
+. ./functions.sh
 
-sleep 0.1
-echo "out" > /sys/class/gpio/gpio18/direction
-echo "0" > /sys/class/gpio/gpio18/value
+ensure_pigpiod
+pigs modes 18 w write 18 0

vbus.sh

@@ -1,15 +1,11 @@
 #!/bin/sh
 
+. ./functions.sh
+
 if [ "$1" != "0" ] && [ "$1" != "1" ]; then
     echo "Needs an argument of 0 or 1"
     exit 0
 fi
 
-if [ ! -d /sys/class/gpio/gpio21 ]
-then
-    echo "21" > /sys/class/gpio/export
-fi
-
-sleep 0.1
-echo "out" > /sys/class/gpio/gpio21/direction
-echo $1 > /sys/class/gpio/gpio21/value
+ensure_pigpiod
+pigs modes 21 w write 21 $1

vbus_off.sh

@@ -1,10 +1,6 @@
 #!/bin/sh
 
-if [ ! -d /sys/class/gpio/gpio21 ]
-then
-    echo "21" > /sys/class/gpio/export
-fi
+. ./functions.sh
 
-sleep 0.1
-echo "out" > /sys/class/gpio/gpio21/direction
-echo "0" > /sys/class/gpio/gpio21/value
+ensure_pigpiod
+pigs modes 21 w write 21 0

vbus_on.sh

@@ -1,10 +1,6 @@
 #!/bin/sh
 
-if [ ! -d /sys/class/gpio/gpio21 ]
-then
-    echo "21" > /sys/class/gpio/export
-fi
+. ./functions.sh
 
-sleep 0.1
-echo "out" > /sys/class/gpio/gpio21/direction
-echo "1" > /sys/class/gpio/gpio21/value
+ensure_pigpiod
+pigs modes 21 w write 21 1