Differences

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--- getting_started:tutorials:hal3 [2026/05/13 10:49] – ursgraf
+++ getting_started:tutorials:hal3 [2026/05/13 10:55] (current) – ursgraf
@@ Line 2: / Line 2: @@
 In the EEROS library you will find a directory with examples. For this example see [[https://github.com/eeros-project/eeros-framework/blob/master/examples/hal/HalTest4.cpp|HalTest4.cpp]].
-The system either uses real hardware inputs and output or makes use of a simulated gpio device. The hardware could be (TODO). You also need to install the necessary wrapper library, see [[getting_started:install_wrapper|]].
+The system either uses real hardware inputs and output or makes use of a simulated gpio device. You need to install the necessary wrapper library for gpio, see [[getting_started:install_wrapper|]].
 When using a simulated gpio device, make sure to load the kernel driver first and then create the device with
@@ Line 33: / Line 33: @@
 <code>
 $ cat /sys/devices/platform/gpio-sim.0/gpiochip0/sim_gpio0/value
+</code>
+Next, change the state of channel 16. This is a critical input in the safety system and causes a transition to safety level //slTwo// when pulled up.
+<code>
+$ echo pull-up | sudo tee /sys/devices/platform/gpio-sim.0/gpiochip0/sim_gpio16/pull
+</code>
+To change back to //slOne// change the level back to '0'.
+<code>
+$ echo pull-down | sudo tee /sys/devices/platform/gpio-sim.0/gpiochip0/sim_gpio16/pull
 </code>