Rock/LED - Revision history

Hipboi at 05:23, 6 January 2015

2015-01-06T05:23:37Z

Naobsd at 04:03, 4 November 2014

2014-11-04T04:03:06Z

Naobsd at 04:02, 4 November 2014

2014-11-04T04:02:09Z

Hipboi at 03:18, 18 September 2014

2014-09-18T03:18:49Z

Hipboi: /* LEDs as GPIOs */

2014-09-18T03:08:24Z

‎LEDs as GPIOs

Julien: /* Rock/LED */

2014-09-11T09:56:36Z

‎Rock/LED

Hipboi: /* LEDs as class devices */

2014-09-01T06:07:15Z

‎LEDs as class devices

Hipboi: /* LEDs as class devices */

2014-09-01T06:04:47Z

‎LEDs as class devices

Julien: /* Rock/LED */

2014-07-28T08:09:35Z

‎Rock/LED

Hipboi: /* python */

2014-05-20T02:54:38Z

‎python

← Older revision		Revision as of 05:23, 6 January 2015
Line 1:		Line 1:
		+	{{rock_header}}
		+	{{Languages\| rock/LED}}
		+
	The Radxa Rock has 3 LEDs on board.		The Radxa Rock has 3 LEDs on board.

@@ Line 20: / Line 20: @@
 __TOC__
-= LEDs as class devices =
+== LEDs as class devices ==
 On the latest kernel images (Ubuntu 14.04 server/desktop), the 3 LEDs are configured as LED class devices.

← Older revision		Revision as of 04:02, 4 November 2014
Line 63:		Line 63:

	'''The GPIO control external LEDs is moved to [[rock/GPIO\|GPIO]] page.'''		'''The GPIO control external LEDs is moved to [[rock/GPIO\|GPIO]] page.'''
		+
		+	== turn off LEDs ==
		+
		+	use "none" trigger for triggered LEDs or just turn off for non-triggered LEDs.
		+
		+	e.g.
		+
		+	echo none > /sys/class/leds/blue/trigger
		+	echo none > /sys/class/leds/green/trigger
		+	echo 0 > /sys/class/leds/red/brightness
		+
		+	you can modify [https://github.com/radxa/linux-rockchip/blob/889bc07b6e62705a8ea04b021db3cc73a786c2d4/arch/arm/mach-rk3188/board-rk3188-box.c#L1330 kernel] to change default state at boot.

← Older revision		Revision as of 03:18, 18 September 2014
Line 61:		Line 61:
	* sleep		* sleep
	* rfkill0		* rfkill0
		+
		+	'''The GPIO control external LEDs is moved to [[rock/GPIO\|GPIO]] page.'''

← Older revision		Revision as of 03:08, 18 September 2014
Line 61:		Line 61:
	* sleep		* sleep
	* rfkill0		* rfkill0
−
−	~~= LEDs as GPIOs =~~
−
−	~~On the previous kernel images, the LEDs can be controlled as GPIOs.~~
−
−	~~Below is program in different languages to flash the green led on RR.~~
−
−	~~== C ==~~
−	~~<syntaxhighlight lang="c" enclose="div">~~
−
−	~~#include <stdio.h>~~
−
−	~~int main()~~
−	{
−	~~FILE *fp = fopen("/sys/class/gpio/export", "w");~~
−	~~if( !fp )~~
−	{
−	~~printf("error open export file");~~
−	~~return 1;~~
−	}
−	~~fprintf(fp, "%d", 172);~~
−	~~fclose(fp);~~
−
−	~~fp = fopen("/sys/class/gpio/gpio175/direction", "w");~~
−
−	~~if( !fp )~~
−	{
−	~~printf("error open export file");~~
−	~~return 1;~~
−	}
−	~~fprintf(fp, "%s", "out");~~
−	~~fclose(fp);~~
−
−	~~fp = fopen("/sys/class/gpio/gpio175/value", "w");~~
−
−	~~if( !fp )~~
−	{
−	~~printf("error open export file");~~
−	~~return 1;~~
−	}
−	~~fprintf(fp, "%d", 1);~~
−
−	}
−
−	~~</syntaxhighlight>~~
−
−	~~== Python ==~~
−	~~<syntaxhighlight lang="python" enclose="div">~~
−
−	~~import time~~
−
−	~~def initpin(pinnum, mode):~~
−	~~'''~~
−	~~pinnum: pin number, eg. 172, 175 etc.~~
−	~~mode: pin mode, valid values: in or out~~
−	~~'''~~
−	~~with open('/sys/class/gpio/export', 'w') as f:~~
−	~~f.write(str(pinnum))~~
−
−	~~with open('/sys/class/gpio/gpio' + str(pinnum) + '/direction', 'w') as f:~~
−	~~f.write(str(mode))~~
−
−	~~def setpin(pinnum, value):~~
−
−	~~with open('/sys/class/gpio/gpio' + str(pinnum) + '/value', 'w') as f:~~
−	~~f.write(str(value))~~
−
−	~~if __name__ == '__main__':~~
−	~~initpin(172, 'out')~~
−	~~while True:~~
−	~~setpin(172, 0)~~
−	~~time.sleep(1)~~
−	~~setpin(172, 1)~~
−	~~time.sleep(1)~~
−	~~</syntaxhighlight>~~
−
−	~~== Shell ==~~
−	~~<syntaxhighlight lang="bash" enclose="div">~~
−
−	~~#!/bin/sh~~
−
−	~~# enable the gpio 172 -> green led~~
−	~~echo 172 > /sys/class/gpio/export~~
−
−	~~# set the direction to output~~
−	~~echo "out" > /sys/class/gpio/gpio172/direction~~
−	~~while true;~~
−	do
−	~~echo 0 > /sys/class/gpio/gpio172/value #led on~~
−	~~sleep 1~~
−	~~echo 1 > /sys/class/gpio/gpio172/value #led off~~
−	~~sleep 1~~
−	~~done~~
−
−	~~</syntaxhighlight>~~

@@ Line 1: / Line 1: @@
-The RR has 3 LEDs: green(172), blue(174), red(175).
+The Radxa Rock has 3  LEDs on board.
-All can be programmable.
+{| class="wikitable" style="width:25%; white-space:nowrap; text-align:center"
 __TOC__
@@ Line 14: / Line 29: @@
 The default status of the three on board leds are:
-    RED: On when there is power
+* <span style="color: red;">Red</span>: On when there is power
-    GREEN: Flash twice per second after the kernel booting, it's called heartbeat.
+* <span style="color: green;">Green</span>: Flash twice per second after the kernel booting, it's called heartbeat.
-    BLUE: Flash when the uSD card is reading/writing.
+* <span style="color: blue;">Blue</span>: Flash when the uSD card is reading/writing.
 = LEDs as GPIOs =
-On the previous kernel images, the LEDs can be controled as GPIOs.
+On the previous kernel images, the LEDs can be controlled as GPIOs.
 Below is program in different languages to flash the green led on RR.

← Older revision		Revision as of 06:07, 1 September 2014
Line 12:		Line 12:

	Read the documentation for more information: https://www.kernel.org/doc/Documentation/leds/leds-class.txt		Read the documentation for more information: https://www.kernel.org/doc/Documentation/leds/leds-class.txt
		+
		+	The default status of the three on board leds are:
		+	RED: On when there is power
		+	GREEN: Flash twice per second after the kernel booting, it's called heartbeat.
		+	BLUE: Flash when the uSD card is reading/writing.

	= LEDs as GPIOs =		= LEDs as GPIOs =

@@ Line 7: / Line 7: @@
 = LEDs as class devices =
-On the latest kernel images (radxa-rock/android-kk branch), the 3 LEDs are configured as LED class devices.
+On the latest kernel images (Ubuntu 14.04 server/desktop), the 3 LEDs are configured as LED class devices.
 You can control them via '''/sys/class/leds/'''

@@ Line 1: / Line 1: @@
-The RR has 3 LEDs, green(172), blue(174), red(175). All can be programmable.
+The RR has 3 LEDs: green(172), blue(174), red(175).
-Below is program in different languages to flash the green led on RR.
+= LEDs as class devices =
-__TOC__
+On the latest kernel images (radxa-rock/android-kk branch), the 3 LEDs are configured as LED class devices.
-== c ==
+== C ==
 <syntaxhighlight lang="c" enclose="div">
@@ Line 20: / Line 32: @@
      return 1;
+   }
-   fprintf(fp, "%d", 175);
+   fprintf(fp, "%d", 172);
    fclose(fp);
@@ Line 46: / Line 58: @@
 </syntaxhighlight>
-== python ==
+== Python ==
 <syntaxhighlight lang="python" enclose="div">
@@ Line 68: / Line 80: @@
 if __name__ == '__main__':
-   initpin(175, 'out')
+   initpin(172, 'out')
    while True:
-     setpin(175, 0)
+     setpin(172, 0)
      time.sleep(1)
-     setpin(175, 1)
+     setpin(172, 1)
      time.sleep(1)
 </syntaxhighlight>
-== shell ==
+== Shell ==
 <syntaxhighlight lang="bash" enclose="div">
@@ Line 95: / Line 107: @@
 </syntaxhighlight>

@@ Line 56: / Line 56: @@
    mode: pin mode, valid values: in or out
    '''
    with open('/sys/class/gpio/export', 'w') as f:
      f.write(str(pinnum))