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Using Video4Linux2 SAA7134 Driver with VFG73xx - 4 -

Introduction

To use an RTD VFG7330 or VFG7350 frame grabber utilityModule™ under Linux, you need a device driver. The

kernel already provides a Video4Linux2 device driver for boards using the Philips SAA7130, SAA7133, SAA7134,

and SAA7135 chips. Support for RTD VFG73xx devices has been added to this driver.

This document provides a general overview of setting up and utilizing the Video4Linux2 SAA7134 driver. Fedora

Core 4 running a 2.6.15 kernel built from kernel.org source was used for the creation of this application note.

Procedure for 2.4 Kernels

The Video4Linux2 project maintainers may or may not be submitting software updates for inclusion in the official

2.4 kernel source tree. Therefore, the 2.6 kernel should be used.

Procedure for 2.6 Kernels

Preparing the SAA7134 driver for use on a 2.6 kernel requires that you perform the following steps: 1) create a

video-aware kernel, and 2) load the necessary kernel modules.

Creating a Video-Aware Kernel

Beginning with the 2.6.15 release, the official kernel source tree SAA7134 driver supports RTD VFG73xx devices.

To obtain kernel source code, download it from the Linux Kernel Archives at http://www.kernel.org. Once you

have the kernel source, you can configure and build the kernel.

I2C Support

VFG73xx devices require I2C support from the kernel. To enable kernel I2C functionality, make the following

kernel configuration changes:

* Under the Device Drivers / I2C support configuration submenu, I2C support should be compiled as a

module.

* Under the Device Drivers / I2C support / I2C support / Miscellaneous I2C Chip support submenu, Philips

PCF8574 and PCF8574A should be compiled as a module if you want to use digital I/O.

SAA7134 Support

Since RTD VFG73xx devices use Philips SAA713x chips, they need the kernel SAA7134 device driver. To

build the SAA7134 driver, make the following kernel configuration changes:

* Under the Device Drivers / Multimedia devices configuration submenu, Video For Linux should be

compiled as a module.

* Under the Device Drivers / Multimedia devices / Video For Linux / Video For Linux configuration

submenu, Philips SAA7134 support should be compiled as a module.

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Audio Note Empress Bedienungsanleitung Seite 4