Changes between Version 38 and Version 39 of gpio

Timestamp:

07/09/2024 05:27:48 PM (16 months ago)

Author:

Tim Harvey

Comment:

added another gpioset example showing how to pulse a gpio

gpio

@@ -280 +280 @@
 
 Examples (Venice):
- - Use gpiofind/gpioget/gpioset on the GPIO named 'pci_wdis#'
-{{{#!bash
-# gpiofind pci_wdis#
-gpiochip3 7
-# gpioget gpiochip3 7
-1
-# gpioset --mode=signal --background gpiochip3 7=0
-}}}
-  
- - Finding DIO1 and setting it to output 1
+ - Finding DIO1 and setting it to output 1 until process is killed (no background)
 {{{#!bash
 # gpioinfo | grep dio
@@ -298 +289 @@
 # gpioset --mode signal gpiochip0 9=1
 }}}
-
-- Note that once gpioset exits its process the GPIO's it changed will revert back to their prior state (by design) therefore we run it above with {{{--mode=signal}}} telling it to continue to run into it receives a signal and (optinally) {{{--background}}} telling it to detach from the controlling terminal to give our shell back. Another process cannot take control of the GPIO if it is being controlled already.
+  - Note that once gpioset exits its process the GPIO's it changed will revert back to their prior state (by design) therefore we run it above with {{{--mode=signal}}} telling it to continue to run into it receives a signal and (optinally) {{{--background}}} telling it to detach from the controlling terminal to give our shell back. Another process cannot take control of the GPIO if it is being controlled already.
+ - Use gpiofind/gpioget/gpioset on the GPIO named 'pci_wdis#' to drive it low indefinitely (background mode)
+{{{#!bash
+# gpiofind pci_wdis#
+gpiochip3 7
+# gpioget gpiochip3 7
+1
+# gpioset --mode=signal --background gpiochip3 7=0
+}}}
+  - in background mode the {{{gpioset}}} command continues to run in the background but can be killed via a SIGKILL or SIGTERM which will restore the GPIO to its original state and exit the process
+ - Finding M2_OFF# and driving it low (asserting it) momentarily for 10ms then releasing it (de-asserting it)
+{{{#!bash
+# gpiofind m2_off#
+gpiochip3 2
+# gpioget gpiochip3 2
+1
+# gpioset --mode=time --usec 10000 gpiochip3 2=0
+}}}
+}}} 
 
 References: