GPIO LEDS - Revision history

JulienB: /* Usage */

2017-09-07T16:16:32Z

‎Usage

JulienB: /* Usage */

2017-09-07T16:13:36Z

‎Usage

JulienB: /* Usage */

2017-09-07T16:08:59Z

‎Usage

JulienB: /* Usage */

2017-09-07T16:07:21Z

‎Usage

FabienM: /* Introduction */

2017-06-21T09:47:29Z

‎Introduction

FabienM: /* Introduction */

2017-06-21T09:37:36Z

‎Introduction

FabienM: /* Introduction */

2017-03-08T12:54:08Z

‎Introduction

JulienB at 08:48, 28 April 2015

2015-04-28T08:48:56Z

Jean-jacquesC: /* Configuration */

2012-12-11T10:13:50Z

‎Configuration

Sly: /* Usage */ full path is better

2012-08-08T18:30:32Z

‎Usage: full path is better

@@ Line 107: / Line 107: @@
 </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]].
 <pre class="apf">
@@ Line 121: / Line 122: @@
 </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">

@@ Line 115: / Line 115: @@
 New config files are available :
 <pre class="apf">
-# ls /sys/class/leds/$LED:green:user/
+# ls /sys/class/leds/$LED/
 brightness          gpio                power               uevent
 desired_brightness  inverted            subsystem

@@ Line 82: / Line 82: @@
 ==Usage==
-* In following instructions replace $LED with "''apfdev''", except on [[OPOS6ULDev]] where you will use "''User''":
+* In following instructions replace $LED with "''apfdev\:green\:user''", except on [[OPOS6ULDev]] where you will use "''User''":
 <pre class="apf">
-# ls /sys/class/leds/$LED\:green\:user/
+# ls /sys/class/leds/$LED/
 brightness      max_brightness  subsystem       uevent
 device          power           trigger
@@ Line 93: / Line 93: @@
 * "nand-disk": the led will blink each time nand access occur (try with ''sync'' command to see it blinking).
 <pre class="apf">
-# cat /sys/class/leds/$LED\:green\:user/trigger
+# cat /sys/class/leds/$LED/trigger
 none nand-disk mmc0 timer [heartbeat] backlight gpio default-on
-# echo none > /sys/class/leds/$LED\:green\:user/trigger
+# echo none > /sys/class/leds/$LED/trigger
 </pre>
@@ Line 102: / Line 102: @@
 <pre class="apf">
-# cat /sys/class/leds/$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/$LED/brightness
 </pre>
@@ Line 110: / Line 110: @@
 <pre class="apf">
-# echo "gpio" > /sys/class/leds/$LED:green:user/trigger
+# echo "gpio" > /sys/class/leds/$LED/trigger
 </pre>
@@ Line 124: / Line 124: @@
 <pre class="apf">
-# echo 17 > /sys/class/leds/$LED:green:user/gpio
+# echo 17 > /sys/class/leds/$LED/gpio
 </pre>

@@ Line 82: / Line 82: @@
 ==Usage==
 <pre class="apf">
-# ls /sys/class/leds/apfdev\:green\:user/
+# ls /sys/class/leds/$LED\:green\:user/
 brightness      max_brightness  subsystem       uevent
 device          power           trigger
@@ Line 92: / Line 93: @@
 * "nand-disk": the led will blink each time nand access occur (try with ''sync'' command to see it blinking).
 <pre class="apf">
-# cat /sys/class/leds/apfdev\:green\:user/trigger
+# cat /sys/class/leds/$LED\:green\:user/trigger
 none nand-disk mmc0 timer [heartbeat] backlight gpio default-on
-# echo none > /sys/class/leds/apfdev\:green\:user/trigger
+# echo none > /sys/class/leds/$LED\:green\:user/trigger
 </pre>
@@ Line 101: / Line 102: @@
 <pre class="apf">
-# cat /sys/class/leds/apfdev\:green\:user/max_brightness > /sys/class/leds/apfde
+# cat /sys/class/leds/$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>
@@ Line 110: / Line 110: @@
 <pre class="apf">
-# echo "gpio" > /sys/class/leds/apfdev:green:user/trigger
+# echo "gpio" > /sys/class/leds/$LED:green:user/trigger
 </pre>
 New config files are available :
 <pre class="apf">
-# ls /sys/class/leds/apfdev:green:user/
+# ls /sys/class/leds/$LED:green:user/
 brightness          gpio                power               uevent
 desired_brightness  inverted            subsystem
@@ Line 124: / Line 124: @@
 <pre class="apf">
-# echo 17 > /sys/class/leds/apfdev:green:user/gpio
+# echo 17 > /sys/class/leds/$LED:green:user/gpio
 </pre>

@@ Line 9: / Line 9: @@
 * APF51: GPIO_PORTA | 2
 * APF6: GPIO7 | 12
-* OPOS6UL: GPIO2 | 1
+* OPOS6UL: GPIO3 | 4
 ==Configuration==

@@ 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==
-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
 * APF27: GPIO_PORTF | 14
 * APF28: PINID_GPMI_RDY1 (Bank 0 - pin 21)
 * APF51: GPIO_PORTA | 2
 ==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:

@@ 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.
 <pre class="config">
 Device Drivers  --->