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RPi updates #560

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merged 2 commits into from
Jun 14, 2023
Merged

RPi updates #560

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e3fb165
Bugfix RPi gpio export
olbjo Jun 12, 2023
87a6291
Change recommended startup timing
olbjo Jun 12, 2023
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2 changes: 1 addition & 1 deletion doc/additional_linux_details.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -230,7 +230,7 @@ the ``[Unit]`` part of your ``.service`` file::
You might also need to add this to the ``[Service]`` part of your
``.service`` file::

ExecStartPre=/usr/bin/sleep 0.3
ExecStartPre=/usr/bin/sleep 1.0

If the P-Net application fails to connect to snmpd, a message "Warning: Failed
to connect to the agentx master agent" will be written to the P-Net sample
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11 changes: 9 additions & 2 deletions src/ports/linux/enable-rpi-gpio-pins.sh
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@@ -1,7 +1,14 @@
#!/bin/sh

# Avoid exporting gpios several times
gpio_export() {
if ! [ -d /sys/class/gpio/gpio$1 ]; then
echo $1 > /sys/class/gpio/export
fi
}

# Enable GPIO pins for digital inputs (buttons) on Raspberry Pi
echo 22 > /sys/class/gpio/export
echo 27 > /sys/class/gpio/export
gpio_export 22
gpio_export 27

# GPIO pins for digital outputs (LEDs) are enabled in another script
2 changes: 1 addition & 1 deletion src/ports/linux/pnet-sampleapp.service
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Expand Up @@ -13,7 +13,7 @@ ExecStartPre=/sbin/ifconfig eth0 up
ExecStartPre=/bin/sh -c '/bin/echo "49152 60999" > /proc/sys/net/ipv4/ip_local_port_range'
ExecStartPre=/usr/bin/enable-rpi-gpio-pins.sh
# Enable this line if waiting for snmpd to start
#ExecStartPre=/usr/bin/sleep 0.3
#ExecStartPre=/usr/bin/sleep 1.0
WorkingDirectory=/home/pi/profinet/build/
ExecStart=/home/pi/profinet/build/pn_dev -v -b /sys/class/gpio/gpio27/value -d /sys/class/gpio/gpio22/value
# Use this instead for dual ports:
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