GPIO Driver - Revision history

FabienM at 15:41, 12 December 2011

2011-12-12T15:41:48Z

← Older revision		Revision as of 16:41, 12 December 2011
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	{{~~Note~~\| This article describe the method to use gpio with armadeus '''version < 4.0'''. To use gpio on armadeus '''version 4.0''' or more see [[GPIOlib]]}}		{{Warning\| This article describe the method to use gpio with armadeus '''version < 4.0'''. To use gpio on armadeus '''version 4.0''' or more see [[GPIOlib]]}}

FabienM at 07:46, 11 October 2011

2011-10-11T07:46:39Z

← Older revision		Revision as of 08:46, 11 October 2011
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	{{Note\| This article describe the ~~methode~~ to use gpio with armadeus '''version < 4.0'''. To use gpio on armadeus '''version 4.0''' or more see [[GPIOlib]]}}		{{Note\| This article describe the method to use gpio with armadeus '''version < 4.0'''. To use gpio on armadeus '''version 4.0''' or more see [[GPIOlib]]}}

FabienM at 07:46, 11 October 2011

2011-10-11T07:46:12Z

← Older revision		Revision as of 08:46, 11 October 2011
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	{{Note\| This article describe the methode to use gpio with armadeus version < 4.0. To use gpio on armadeus version 4.0 or more see [[GPIOlib]]}}		{{Note\| This article describe the methode to use gpio with armadeus '''version < 4.0'''. To use gpio on armadeus '''version 4.0''' or more see [[GPIOlib]]}}

FabienM at 07:45, 11 October 2011

2011-10-11T07:45:50Z

← Older revision		Revision as of 08:45, 11 October 2011
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			{{Note\| This article describe the methode to use gpio with armadeus version < 4.0. To use gpio on armadeus version 4.0 or more see [[GPIOlib]]}}


	On this page, you will find all the informations needed to use the Armadeus GPIO driver.		On this page, you will find all the informations needed to use the Armadeus GPIO driver.

FabienM: /* Driver usage */

2011-01-18T17:26:41Z

Driver usage

← Older revision		Revision as of 18:26, 18 January 2011
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	== Driver usage ==		== Driver usage ==

			=== As_devices ===

			GPIO can be use with library [[AsDevices]].

	=== Directly with shell commands (through /proc & /dev filesystem) ===		=== Directly with shell commands (through /proc & /dev filesystem) ===

JulienB: /* Examples */

2010-02-15T14:45:10Z

Examples

← Older revision		Revision as of 15:45, 15 February 2010
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	# echo -ne "\x00" > /dev/gpio/PD31		# echo -ne "\x00" > /dev/gpio/PD31
	# echo -ne "\x01" > /dev/gpio/PD31		# echo -ne "\x01" > /dev/gpio/PD31
			</pre>

			* Blinks the LED on [[APF27Dev]] (pin 14 of portF):
			<pre class="apf">
			# cat /proc/driver/gpio/portFmode \| sed "s/[0-1]$[0-1]\{14\}$$/1\1/" > /proc/driver/gpio/portFmode
			# cat /proc/driver/gpio/portFdir \| sed "s/[0-1]$[0-1]\{14\}$$/1\1/" > /proc/driver/gpio/portFdir
			# echo -ne "\x01" > /dev/gpio/PF14
			# echo -ne "\x00" > /dev/gpio/PF14
	</pre>		</pre>

JulienB: /* Examples: */

2010-02-15T14:38:00Z

Examples:

← Older revision		Revision as of 15:38, 15 February 2010
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	# ''/proc/drivers/gpio/portXpullup'': (de)activate i.MX internal pull-up for that GPIO		# ''/proc/drivers/gpio/portXpullup'': (de)activate i.MX internal pull-up for that GPIO

	====Examples:====		====Examples====
	* Configure IO-Pin 31 of port A (LCD_OE_ACD on the APF27) as GPIO (not reversible):		* Configure IO-Pin 31 of port A (LCD_OE_ACD on the APF27) as GPIO (not reversible):
	<pre class="apf">		<pre class="apf">

JulienB: Be more precise for interrupts

2009-11-01T09:16:24Z

Be more precise for interrupts

← Older revision		Revision as of 10:16, 1 November 2009
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	# use ''/proc/drivers/gpio/portXdir'' to read (with ''cat'') or set (with ''echo'') pin direction (where X is your port name)		# use ''/proc/drivers/gpio/portXdir'' to read (with ''cat'') or set (with ''echo'') pin direction (where X is your port name)
	# then use ''/proc/drivers/gpio/portX'' to read (with ''cat'') or write (with ''echo'') pin status		# then use ''/proc/drivers/gpio/portX'' to read (with ''cat'') or write (with ''echo'') pin status
	# ''/proc/drivers/gpio/portXirq'': configure if GPIO ~~should be used~~ as an ~~interruptible one~~ (ie blocking read)		# ''/proc/drivers/gpio/portXirq'': to configure GPIO as an interrupt (blocking read); 0-> no interrupt, 1-> rising edge, 2-> falling edge, 3-> both edges
	# ''/proc/drivers/gpio/portXpullup'': (de)activate i.MX internal pull-up for that GPIO		# ''/proc/drivers/gpio/portXpullup'': (de)activate i.MX internal pull-up for that GPIO

JulienB: move ioctl C interface before /proc one

2009-10-29T11:31:54Z

move ioctl C interface before /proc one

@@ Line 100: / Line 100: @@
 * A test script is available in ''target/test/'' : [http://armadeus.git.sourceforge.net/git/gitweb.cgi?p=armadeus/armadeus;a=blob;f=target/test/test_gpio.sh;h=e2e54e855aeb25b0f0cbae5915930e9f904861dc;hb=HEAD test_gpio.sh]
 === Directly with C program: /proc filesystem===
-{{Note|For performance please use IOCTL instead (see next chapter)}}
+{{Note|For performance please use IOCTL instead (see above)}}
 After inserting the GPIO module, /proc entries are created in the
@@ Line 148: / Line 160: @@
      return (0);
 </source>
 == Links ==

JulienB: some precisions

2009-10-29T11:30:29Z

some precisions

← Older revision		Revision as of 12:30, 29 October 2009
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	On this page, you will find all the informations needed to use the Armadeus GPIO driver.		On this page, you will find all the informations needed to use the Armadeus GPIO driver.

			==Installation==
	==Compilation==		==Compilation==
	~~Done by default starting from~~ Armadeus-3.0 release. See [[Talk:GPIO_Driver]] to know how.		Since Armadeus-3.0 release, gpio driver is compiled and installed by default in rootfs. See [[Talk:GPIO_Driver]] to know how.

	~~==Installation==~~		You have 2 modules:
	~~When compiled, you will~~ have 2 modules:
	* gpio: this is the main driver. It should be loaded first and will allow you to easily control GPIO pins from user space,		* gpio: this is the main driver. It should be loaded first and will allow you to easily control GPIO pins from user space,
	* ppdev: this is an extension driver to add PPDEV emulation to gpio.ko. This way you will be able to emulate a standard parallel port on one GPIO port (to connect a textual LCD, for example).		* ppdev: this is an extension driver to add PPDEV emulation to gpio.ko. This way you will be able to emulate a standard parallel port on one GPIO port (to connect a textual LCD, for example).
	{{Note\|The parallel port driver (ppdev) will only work on [[APF9328]] based systems !}}		{{Note\|The parallel port driver (ppdev) will only work on [[APF9328]] based systems for now !}}

	===Loading driver===		===Loading driver===
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	=== Directly with shell commands (through /proc & /dev filesystem) ===		=== Directly with shell commands (through /proc & /dev filesystem) ===

	GPIO driver is ~~configurable~~ through /proc interface:		GPIO driver is usable through its /proc interface:
	* use ''/proc/drivers/gpio/portXmode'' to configure a pin as a gpio (with ''echo'') and where X is your port name: A, B, C or D (E,F for apf27)		# use ''/proc/drivers/gpio/portXmode'' to configure a pin as a gpio (with ''echo'') and where X is your port name: A, B, C or D (E,F for apf27)
	* use ''/proc/drivers/gpio/portXdir'' to read (with ''cat'') or set (with ''echo'') pin direction (where X is your port name)		# use ''/proc/drivers/gpio/portXdir'' to read (with ''cat'') or set (with ''echo'') pin direction (where X is your port name)
	* then use ''/proc/drivers/gpio/portX'' to read (with ''cat'') or write (with ''echo'') pin status		# then use ''/proc/drivers/gpio/portX'' to read (with ''cat'') or write (with ''echo'') pin status
	* ''/proc/drivers/gpio/portXirq'': configure if GPIO should be used as an interruptible one (ie blocking read)		# ''/proc/drivers/gpio/portXirq'': configure if GPIO should be used as an interruptible one (ie blocking read)
	* ''/proc/drivers/gpio/portXpullup'': (de)activate i.~~MXL~~ internal pull-up for that GPIO		# ''/proc/drivers/gpio/portXpullup'': (de)activate i.MX internal pull-up for that GPIO

	====Examples:====		====Examples:====