GPIO LEDS - Revision history

JulienB: /* Usage */

2017-09-07T16:16:32Z

Usage

← Older revision		Revision as of 18:16, 7 September 2017
Line 107:		Line 107:
	</pre>		</pre>

	It is possible to switch ~~led~~ state using the APF28Dev ~~user~~ button. This button is seen as gpio17 (as seen under APF28Dev [[datasheet]]) under Linux~~, then configure~~ the ~~led~~ trigger as gpio :		It is possible to switch LED state using the [[APF28Dev]]/[[OPOS6ULDev]] User button. This button is seen as gpio17 (as seen under APF28Dev [[datasheet]]) under Linux; gpio43 on [[OPOS6ULDev]].
			Configure the LED trigger as gpio :

	<pre class="apf">		<pre class="apf">
Line 121:		Line 122:
	</pre>		</pre>

	Then the trigger gpio can be configured with ''gpio'' file :		Then the trigger gpio can be configured with ''gpio'' file (replace 17 with 43 on [[OPOS6ULDev]]) :

	<pre class="apf">		<pre class="apf">

JulienB: /* Usage */

2017-09-07T16:13:36Z

Usage

← Older revision		Revision as of 18:13, 7 September 2017
Line 115:		Line 115:
	New config files are available :		New config files are available :
	<pre class="apf">		<pre class="apf">
	# ls /sys/class/leds/$LED~~:green:user~~/		# ls /sys/class/leds/$LED/
	brightness gpio power uevent		brightness gpio power uevent
	desired_brightness inverted subsystem		desired_brightness inverted subsystem

JulienB: /* Usage */

2017-09-07T16:08:59Z

Usage

← Older revision		Revision as of 18:08, 7 September 2017
Line 82:		Line 82:

	==Usage==		==Usage==
	* In following instructions replace $LED with "''apfdev''", except on [[OPOS6ULDev]] where you will use "''User''":		* In following instructions replace $LED with "''apfdev\:green\:user''", except on [[OPOS6ULDev]] where you will use "''User''":
	<pre class="apf">		<pre class="apf">
	# ls /sys/class/leds/$LED~~\:green\:user~~/		# ls /sys/class/leds/$LED/
	brightness max_brightness subsystem uevent		brightness max_brightness subsystem uevent
	device power trigger		device power trigger
Line 93:		Line 93:
	* "nand-disk": the led will blink each time nand access occur (try with ''sync'' command to see it blinking).		* "nand-disk": the led will blink each time nand access occur (try with ''sync'' command to see it blinking).
	<pre class="apf">		<pre class="apf">
	# cat /sys/class/leds/$LED~~\:green\:user~~/trigger		# cat /sys/class/leds/$LED/trigger
	none nand-disk mmc0 timer [heartbeat] backlight gpio default-on		none nand-disk mmc0 timer [heartbeat] backlight gpio default-on

	# echo none > /sys/class/leds/$LED~~\:green\:user~~/trigger		# echo none > /sys/class/leds/$LED/trigger
	</pre>		</pre>

Line 102:		Line 102:

	<pre class="apf">		<pre class="apf">
	# cat /sys/class/leds/$LED~~\:green\:user~~/max_brightness > /sys/class/leds/$LED~~\:green\:user~~/brightness		# cat /sys/class/leds/$LED/max_brightness > /sys/class/leds/$LED/brightness

	# echo 0 > /sys/class/leds/$LED~~\:green\:user~~/brightness		# echo 0 > /sys/class/leds/$LED/brightness
	</pre>		</pre>

Line 110:		Line 110:

	<pre class="apf">		<pre class="apf">
	# echo "gpio" > /sys/class/leds/$LED~~:green:user~~/trigger		# echo "gpio" > /sys/class/leds/$LED/trigger
	</pre>		</pre>

Line 124:		Line 124:

	<pre class="apf">		<pre class="apf">
	# echo 17 > /sys/class/leds/$LED~~:green:user~~/gpio		# echo 17 > /sys/class/leds/$LED/gpio
	</pre>		</pre>

JulienB: /* Usage */

2017-09-07T16:07:21Z

Usage

← Older revision		Revision as of 18:07, 7 September 2017
Line 82:		Line 82:

	==Usage==		==Usage==
			* In following instructions replace $LED with "''apfdev''", except on [[OPOS6ULDev]] where you will use "''User''":
	<pre class="apf">		<pre class="apf">
	# ls /sys/class/leds/~~apfdev~~\:green\:user/		# ls /sys/class/leds/$LED\:green\:user/
	brightness max_brightness subsystem uevent		brightness max_brightness subsystem uevent
	device power trigger		device power trigger
Line 92:		Line 93:
	* "nand-disk": the led will blink each time nand access occur (try with ''sync'' command to see it blinking).		* "nand-disk": the led will blink each time nand access occur (try with ''sync'' command to see it blinking).
	<pre class="apf">		<pre class="apf">
	# cat /sys/class/leds/~~apfdev~~\:green\:user/trigger		# cat /sys/class/leds/$LED\:green\:user/trigger
	none nand-disk mmc0 timer [heartbeat] backlight gpio default-on		none nand-disk mmc0 timer [heartbeat] backlight gpio default-on

	# echo none > /sys/class/leds/~~apfdev~~\:green\:user/trigger		# echo none > /sys/class/leds/$LED\:green\:user/trigger
	</pre>		</pre>

Line 101:		Line 102:

	<pre class="apf">		<pre class="apf">
	# cat /sys/class/leds/~~apfdev~~\:green\:user/max_brightness > /sys/class/leds/~~apfde~~		# cat /sys/class/leds/$LED\:green\:user/max_brightness > /sys/class/leds/$LED\:green\:user/brightness
	v\:green\:user/brightness

	# echo 0 > /sys/class/leds/~~apfdev~~\:green\:user/brightness		# echo 0 > /sys/class/leds/$LED\:green\:user/brightness
	</pre>		</pre>

Line 110:		Line 110:

	<pre class="apf">		<pre class="apf">
	# echo "gpio" > /sys/class/leds/~~apfdev~~:green:user/trigger		# echo "gpio" > /sys/class/leds/$LED:green:user/trigger
	</pre>		</pre>

	New config files are available :		New config files are available :
	<pre class="apf">		<pre class="apf">
	# ls /sys/class/leds/~~apfdev~~:green:user/		# ls /sys/class/leds/$LED:green:user/
	brightness gpio power uevent		brightness gpio power uevent
	desired_brightness inverted subsystem		desired_brightness inverted subsystem
Line 124:		Line 124:

	<pre class="apf">		<pre class="apf">
	# echo 17 > /sys/class/leds/~~apfdev~~:green:user/gpio		# echo 17 > /sys/class/leds/$LED:green:user/gpio
	</pre>		</pre>

FabienM: /* Introduction */

2017-06-21T09:47:29Z

Introduction

← Older revision		Revision as of 11:47, 21 June 2017
Line 9:		Line 9:
	* APF51: GPIO_PORTA \| 2		* APF51: GPIO_PORTA \| 2
	* APF6: GPIO7 \| 12		* APF6: GPIO7 \| 12
	* OPOS6UL: ~~GPIO2~~ \| 1		* OPOS6UL: GPIO3 \| 4

	==Configuration==		==Configuration==

FabienM: /* Introduction */

2017-06-21T09:37:36Z

Introduction

← Older revision		Revision as of 11:37, 21 June 2017
Line 9:		Line 9:
	* APF51: GPIO_PORTA \| 2		* APF51: GPIO_PORTA \| 2
	* APF6: GPIO7 \| 12		* APF6: GPIO7 \| 12
	* OPOS6UL: ? \| ?		* OPOS6UL: GPIO2 \| 1

	==Configuration==		==Configuration==

FabienM: /* Introduction */

2017-03-08T12:54:08Z

Introduction

← Older revision		Revision as of 14:54, 8 March 2017
Line 9:		Line 9:
	* APF51: GPIO_PORTA \| 2		* APF51: GPIO_PORTA \| 2
	* APF6: GPIO7 \| 12		* APF6: GPIO7 \| 12
			* OPOS6UL: ? \| ?

	==Configuration==		==Configuration==

JulienB at 08:48, 28 April 2015

2015-04-28T08:48:56Z

← Older revision		Revision as of 10:48, 28 April 2015
Line 1:		Line 1:
	How to use leds~~-gpio~~ driver to manage states of connected ~~leds of~~ your Armadeus board.		How to use ''gpio-leds'' driver to manage states of the LEDs connected to your Armadeus Dev board.

	==Introduction==		==Introduction==

	You can manage a ~~led~~ connected to a GPIO pin~~. The LED management is~~ similar ~~with~~ the standard GPIO sysfs driver, but you have some new features like triggers (e.g. "heartbeat" LED ~~blinks~~ like a heart at the rate oh the CPU load) . Here are the GPIO used for the user LED ~~for~~ each APF board:		You can manage a LED connected to a GPIO pin with a sysfs interface very similar to the standard [[GPIOlib\|GPIO sysfs driver]], but you will have some new features like triggers (e.g. "heartbeat" trigger will make LED blink like a heart at the rate of the CPU load) . Here are the GPIO used for the user LED on each APF board:
	* APF9328: PORT A / bit 2		* APF9328: PORT A / bit 2
	* APF27: GPIO_PORTF \| 14		* APF27: GPIO_PORTF \| 14
	* APF28: PINID_GPMI_RDY1 (Bank 0 - pin 21)		* APF28: PINID_GPMI_RDY1 (Bank 0 - pin 21)
	* APF51: GPIO_PORTA \| 2		* APF51: GPIO_PORTA \| 2
			* APF6: GPIO7 \| 12

	==Configuration==		==Configuration==
			{{Note\|Following configuration instructions are now done by default in BSP > 5.3, so you can skip them if you use a recent armadeus software}}
	~~First~~, you need to enable the leds-gpio driver in your kernel and some triggers like the "heartbeat" ~~trigger to make the LED flash like a heartbeat~~.		You need to enable the leds-gpio driver in your kernel and some triggers like the "heartbeat".

	* Configure Linux kernel:		* Configure Linux kernel:

Jean-jacquesC: /* Configuration */

2012-12-11T10:13:50Z

Configuration

← Older revision		Revision as of 12:13, 11 December 2012
Line 13:		Line 13:
	First, you need to enable the leds-gpio driver in your kernel and some triggers like the "heartbeat" trigger to make the LED flash like a heartbeat.		First, you need to enable the leds-gpio driver in your kernel and some triggers like the "heartbeat" trigger to make the LED flash like a heartbeat.

			* Configure Linux kernel:
			<pre class="host">
			$ make linux-menuconfig
			</pre>
	<pre class="config">		<pre class="config">
	Device Drivers --->		Device Drivers --->

Sly: /* Usage */ full path is better

2012-08-08T18:30:32Z

Usage: full path is better

← Older revision		Revision as of 20:30, 8 August 2012
Line 118:		Line 118:

	<pre class="apf">		<pre class="apf">
	# echo 17 > gpio		# echo 17 > /sys/class/leds/apfdev:green:user/gpio
	</pre>		</pre>