Difference between revisions of "TV Output"
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== Starting the tool == | == Starting the tool == | ||
At first, the timings of the LCD controler have to be modified. | At first, the timings of the LCD controler have to be modified. | ||
| − | This can be done by means of the imxregs tool (http://www.armadeus.com/wiki/index.php?title=Linux_Debug). Do not forget to unlock the | + | This can be done by means of the imxregs tool (http://www.armadeus.com/wiki/index.php?title=Linux_Debug). Do not forget to unlock the register access rights |
=== 320x240 input format === | === 320x240 input format === | ||
Revision as of 12:39, 20 May 2008
How-To use the SVideo output of the APF9328DevFull
The DevFull is equipped with a SVideo output which can be used to connect a TV to the board.
Contents
Tool installation
Instead of using a real driver, a simple debug tool (CH7024) has been written to configure the SVideo controller.
make menuconfig -> package selection target -> Hardware handling / blockdevices and filesystem maintenance -> ch7024ctrl make
Once compiled, you will see a ch7024 program in the /usr/bin directory of your rootfs.
Configuration
In order to program the right parameters in the CH7024, configuration files (.conf) are used.
They are simple text files containing the register values of the CH7024 for a given configuration.
Depending on your requirements, you have to use the right configuration file.
320x240 input format (like MTFT035)
copy the ch424x283.conf file (armadeus/buildroot/build_arm_nofpu/ch7024ctrl-1.0/ ) in the /usr/bin directory of the APF9328 rootfs.
480x272 input format (like LQ043)
copy the ch500x320.conf file (armadeus/buildroot/build_arm_nofpu/ch7024ctrl-1.0/ ) in the /usr/bin directory of the APF9328 rootfs.
Starting the tool
At first, the timings of the LCD controler have to be modified. This can be done by means of the imxregs tool (http://www.armadeus.com/wiki/index.php?title=Linux_Debug). Do not forget to unlock the register access rights
320x240 input format
imxregs LPCR 0XF8C80087 imxregs HCR 0X78004401 imxregs VCR 0X0C001414 imxregs CSCR 0x03010003 imxregs SPCTL0 0x04011402 imxregs SPCTL1 0x00000040
480x272 input format
imxregs LPCR 0XF8C80085 imxregs HCR 0x28000500 imxregs VCR 0x0c001617 imxregs CSCR 0x03010003 imxregs SPCTL0 0x04011402 imxregs SPCTL1 0x00000040
Then
sh cd /usr/bin ch7024 configurationFileName.conf (ie: ch7024 ch424x283.conf)
Changing SVideo parameters
Changing the SVideo parameters is not easy due to several PLL parameters which have to be fine tuned. An external tool (running only under Windows :( )is required. As the documentation for this component is restricted to registered users (no other choice :( ), please contact us if you need informations.
