Talk:GPIO Driver - Revision history

FabienM at 07:32, 18 October 2012

2012-10-18T07:32:33Z

← Older revision		Revision as of 09:32, 18 October 2012
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			{{Need_Update}}

	==Compilation==		==Compilation==
	The first thing you have to do is to compile the driver. The only way to do that for the moment is to compile it as a module:		The first thing you have to do is to compile the driver. The only way to do that for the moment is to compile it as a module:

JulienB at 13:58, 12 May 2009

2009-05-12T13:58:50Z

← Older revision		Revision as of 15:58, 12 May 2009
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			==Compilation==
			The first thing you have to do is to compile the driver. The only way to do that for the moment is to compile it as a module:
			<pre class="host">
			[host]$ cd armadeus/
			[host]$ make linux26-menuconfig
			</pre>
			Then go in menu:
			<pre class="config">
			Device Drivers
			--> Armadeus specific drivers
			<M> Armadeus GPIO driver
			<M> Armadeus Parallel Port driver
			</pre>

			{{Note\|The parallel port driver will only work on [[APF9328]] based systems !}}

			Exit and save your kernel configuration, then compile it:
			<pre class="host">
			[host]$ make linux26
			</pre>

			When compiled, you will obtain 2 modules in ''armadeus/target/linux/modules/gpio/'':
			* gpio.ko: this is the main driver. It should be loaded first and will allow you to easily control gpio pin from user space,
			* ppdev.ko: 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).

	==Installation==		==Installation==
	You have to:		You have to:

JulienB: New page: ==Installation== You have to: * reflash your rootfs or copy these modules on your target in ''/lib/modules/2.6.18.1/extra/gpio'' (don't forget modules.dep file), * copy loadgpio.sh script ...

2009-05-12T13:56:04Z

New page: ==Installation== You have to: * reflash your rootfs or copy these modules on your target in ''/lib/modules/2.6.18.1/extra/gpio'' (don't forget modules.dep file), * copy loadgpio.sh script ...

New page

==Installation==
You have to:
* reflash your rootfs or copy these modules on your target in ''/lib/modules/2.6.18.1/extra/gpio'' (don't forget modules.dep file),
* copy loadgpio.sh script on your rootfs in /etc/
After that you can launch:
<pre class="apf">
# sh /etc/loadgpio.sh
</pre>
or look inside this script if you want to manually enter the module parameters:
<pre class="apf">
# modprobe gpio portB_init=0,0,0x00FFFF00,0,0,0,0,0,0x0FF00000,0,0,0,0,0,0,0x0FF00000
</pre>
gpio module parameters are values for PORTA, PORTB, PORTC, PORTD configuration registers in following order:
DDIR, OCR1, OCR2, ICONFA1, ICONFA2, ICONFB1, ICONFB2, DR, GIUS, SSR, ICR1, ICR2, IMR, GPR, SWR, PUEN,<br>
'''If you don't know what these registers means, load the module without parameters !!'''