WikiSysop: /* Driver installation */

2013-09-04T18:40:56Z

‎Driver installation

WikiSysop: /* Links */

2011-06-06T14:41:02Z

‎Links

KevinJ: /* Links */

2011-05-11T21:17:22Z

‎Links

KevinJ: New page: This page explain how to use Infrared USB HID Remote on APF board. Some (but not all) are supported by the Linux kernel. ==Driver installation== We have to know the model of your USB de...

2011-05-11T21:15:50Z

New page: This page explain how to use Infrared USB HID Remote on APF board. Some (but not all) are supported by the Linux kernel. ==Driver installation== We have to know the model of your USB de...

New page

This page explain how to use Infrared USB HID Remote on APF board. Some (but not all) are supported by the Linux kernel.

==Driver installation==

We have to know the model of your USB device under Linux. Connect it on a PC with Linux running, open a console and type:

<pre class="host">
$ dmesg
</pre>

You should obtain something like that :

<pre class="host">
[ 8893.213869] generic-usb 0003:062A:0000.0005: input,hidraw0: USB HID v1.10 Mouse [HID 062a:0000] on usb-0000:00:1d.0-2/input0
[ 9739.616076] usb 3-2: new low speed USB device using uhci_hcd and address 5
[ 9739.942974] zydacron 0003:13EC:0006.0006: fixing up zydacron remote control report descriptor
[ 9739.978243] input: HID 13ec:0006 as /devices/pci0000:00/0000:00:1d.1/usb3/3-2/3-2:1.0/input/input16
[ 9739.979060] zydacron 0003:13EC:0006.0006: input,hiddev0,hidraw1: USB HID v1.10 Keyboard [HID 13ec:0006] on usb-0000:00:1d.1-2/input0
</pre>

The last line give the model and the identifier of the product : "Zydacron"
If you don't see anything about the model of your HID device, copy/paste the identifier in google. The identifier must be something like that : 13ec:0006
It always be composed of 4 characters, ":", and 4 characters again.

Then, configure your Linux configuration in your armadeus directory
<pre class="host">
$ make linux26-menuconfig
</pre>

<pre class="config">
Device Drivers --->
[*] HID Devices --->
Special HID drivers --->
</pre>

And then, search your driver (Zydacron in our case).
<pre class="config">
<M> Zydacron remote control support
</pre>

Reflash kernel and rootfs.

==Load the driver==

You must know the module name of the driver.
For Zydacron it is "hid_zydacron".

If you don't know the name of your Linux driver:

<pre class="apf">
# ls /lib/modules/$(uname -r)/kernel/drivers/hid/
</pre>

{{Note| $(uname -r) will be replaced with your kernel version. }}

You should see some or one file(s) with the ".ko" extension, like your_hid_driver.ko (hid_zydacron.ko in our case).

then :
<pre class="apf">
#modprobe your_hid_driver
</pre>

in our case:
<pre class="apf">
# modprobe hid_zydacron
</pre>

==Usage==

Plug the usb receiver of your remote on APF board and type
<pre class="apf">
# modprobe dmsg
</pre>

If you read the model name of your device and something like "eventX" where X is the event number, the Linux input is ready.

Check if the event is correctly set in the input directory:
<pre class="apf">
# ls /dev/input/
</pre>

You should read the event of your device.

Check if the communication is set (replace X by your event number, usualy 0 if no hid device other than your remote has been plugged)
<pre class="apf">
# od -x /dev/input/eventX
</pre>
Push a button on your remote. You should see some incomprehensible characters on the screen, don't worry it sounds good!

==Application example==

The USB HID remote device is configured in Linux like a keyboard.

Here a little example of application in langage C :
<source lang="c">
#include <linux/input.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>

/* Replace X by the number of your event */
char input[] = "/dev/input/eventX";

int main(void)
{
int fd;
struct input_event remote_event;
fd = open(input, O_RDONLY); /* Open the event file */

if(fd == -1) {
printf("Can not open the input device!\n");
return 1;
}
else {
while (1) {
read(fd, &remote_event, sizeof(struct input_event)); /* read the last event */
if(remote_event.type == EV_KEY && remote_event.value == 1) { /* Check if a key was pressed */
if(remote_event.code==103) { /* Compare with key up code */
printf("Key up was pressed\n");
}
else if(remote_event.code==108) { /* Compare with key down code */
printf("Key down was pressed\n");
}
/* ... */
else {
printf("Unknown button with code %d was pressed\n", remote_event.code); /* Print code */
}
}
}
}

return 0;
}
</source>

==Links==
Getting started with uinput [http://thiemonge.org/getting-started-with-uinput]
A little example of code in C [http://thiemonge.org/getting-started-with-uinput]

← Older revision		Revision as of 14:41, 6 June 2011
Line 141:		Line 141:

	A little example of code in C [http://thiemonge.org/getting-started-with-uinput]		A little example of code in C [http://thiemonge.org/getting-started-with-uinput]
		+
		+	[[Category:UserInput]]
		+	[[Category:USB]]

@@ Line 26: / Line 26: @@
 Then, configure your Linux configuration in your armadeus directory
 <pre class="host">
-  $ make linux26-menuconfig
+  $ make linux-menuconfig
 </pre>

@@ Line 139: / Line 139: @@
 ==Links==
 Getting started with uinput [http://thiemonge.org/getting-started-with-uinput]
 A little example of code in C [http://thiemonge.org/getting-started-with-uinput]

IR HID USB Remote - Revision history

WikiSysop: /* Driver installation */

WikiSysop: /* Links */

KevinJ: /* Links */

KevinJ: New page: This page explain how to use Infrared USB HID Remote on APF board. Some (but not all) are supported by the Linux kernel. ==Driver installation== We have to know the model of your USB de...