Advantech RSB-4210 Evaluation Kit User Manual download pdf (Page 98)

RSB-4210 User Manual 90

ioctl(fd, WDIOC_SETOPTIONS, &options);

The following options are available:

WDIOS_DISABLECARDTurn off the watchdog timer

WDIOS_ENABLECARDTurn on the watchdog timer

WDIOS_TEMPPANICKernel panic on temperature trip

More detail please reference "source/linux-2.6.35.3/Documentation/watchdog/watch-

dog-api.txt"

3.11.9 Audio

3.11.9.1 Kernel Configuration

To enable ALSA support you need at least to build the kernel with primary sound card

support (CONFIG_SOUND). Since ALSA can emulate OSS, you don't have to

choose any of the OSS modules.

Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and

PCM supports if you want to run OSS applications with ALSA.

If you want to support the WaveTable functionality on cards such as SB Live! then

you need to enable "Sequencer support" (CONFIG_SND_SEQUENCER).

To make ALSA debug messages more verbose, enable the "Verbose printk" and

"Debug" options. To check for memory leaks, turn on "Debug memory" too. "Debug

detection" will add checks for the detection of cards.

Please note that all the ALSA ISA drivers support the Linux isapnp API (if the card

supports ISA PnP). You don't need to configure the cards using isapnptools.

3.11.9.2 Creating ALSA Devices

This depends on your distribution, but normally you use the /dev/MAKEDEV script to

create the necessary device nodes. On some systems you use a script named 'snd-

devices'.

3.11.9.3 Module Parameters

The user can load modules with options. If the module supports more than one card

and you have more than one card of the same type then you can specify multiple val-

ues for the option separated by commas.

More detail please reference "source/linux-2.6.35.3/Documentation/sound/alsa/

ALSA-Configuration.txt"

3.11.10Keypad/Touchscreen

3.11.10.1Introduction

This is a collection of drivers that is designed to support all input devices under Linux.

While it is currently used only on for USB input devices, future use (say 2.5/2.6) is

expected to expand to replace most of the existing input system, which is why it lives

in drivers/input/ instead of drivers/usb/.

The centre of the input drivers is the input module, which must be loaded before any

other of the input modules - it serves as a way of communication between two groups

of modules:

A. Device drivers

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Advantech RSB-4210 Evaluation Kit User Manual Page 98