GPIO.CONF(5) BSD File Formats Manual GPIO.CONF(5)NAME
gpio.conf -- GPIO config file
The gpio.conf file is read by the gpio rc.d script during system start-up and shutdown, and is intended for configuring GPIO pins.
Lines starting with a hash ('#') and empty lines are ignored. All other lines are passed to gpioctl(8).
/etc/gpio.conf The gpio.conf configuration file resides in /etc.
/etc/rc.d/gpio rc.d(8) script that parses gpio.conf.
In this example, if the /etc/gpio.conf config file is present pin 1 of /dev/gpio0 is set as output and named "error_led".
# Program pin 1 of /dev/gpio0 as output and name it "error_led"
gpio0 1 set out error_led
SEE ALSO gpioctl(8), rc(8)BSD August 1, 2009 BSD
Check Out this Related Man Page
GPIOPWM(4) BSD Kernel Interfaces Manual GPIOPWM(4)NAME
gpiopwm -- support for pulsing GPIO pins in software
gpiopwm* at gpio? offset ? mask 1
gpiopwm* at gpio?
The gpiopwm driver allows for pulsing GPIO pins in software using the callout(9) facility. The pulse frequency and duty cycle are specified
indirectly by setting an ``on'' and ``off'' period, in ticks. Both values are accessible as sysctl(3) variables.
The following sysctl(3) variables are used to define the pulsing:
Define the ``off'' period in ticks.
Define the ``on'' period in ticks.
Only when both the ``on'' and the ``off'' period are set to values higher than zero pulsing will start. To stop the pulsing, set either
value to zero.
To pulse a pin on a machine with 100 ticks/second with a frequency of 1Hz and a duty cycle of 20%, the ``on'' period must be set to 20 and
the ``off'' period must be set to 80. The following example will pulse the error LED of a Soekris net4801 with a frequency of 1 Hz and a
duty cycle of 20%:
# gpioctl gpio0 20 set pp
# gpioctl gpio0 attach gpiopwm 20 1
# sysctl -w hw.gpiopwm0.off=80
# sysctl -w hw.gpiopwm0.on=20
SEE ALSO gpio(4), intro(4), gpioctl(8), sysctl(8)HISTORY
The gpiopwm driver first appeared in NetBSD 6.0.
The gpiopwm driver was written by Marc Balmer <firstname.lastname@example.org>.
BSD November 13, 2011 BSD
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