Kontron KTAM3874-pITX Bedienungsanleitung PDF herunterladen (Seite 22)

KTD-S0057-I Page 18 VESA® DisplayIDTM

KTAM3874/pITX Software Guide

The DisplayID

Editor saves the parameters in a intermediate file format. The file extension is 'KDD' (Kon-

tron D

isplayID

Data). This file format cannot be used to program the onboard EEPROM.

For transferring this file format into the binary file format for the EEPROM apply the Converter.

4.3.5 Building DisplayID

File



Start the Windows

tool DisplayID.exe.



Use the Editor if you want to modify an existing DisplayID

file or select New to create a

complete new record.



Change respectively enter new parameters.



Save the parameters in a file with the extension 'KDD'.



Open the saved 'KDD'-file using the Converter.



Save the binary file with the extension 'KDB' (Kontron DisplayID

Binary).



Program the onboard EEPROM using the board specific update tool.

4.3.6 Erasing DisplayID

Record

Create a dummy file with a size of 128 bytes filled with the value 0xFFh and program this file using the U-

Boot update tool. This treatment deletes a valid DisplayID

record.

4.3.7 U-Boot EEPROM Update Tool

The update tool is a new component of the U-Boot bootloader. You need two commands to program a

DisplayID

file into the EEPROM:



ext2load, fatload, loadb or loady



writedid

File Operation

The following example gives an overview:

The storage medium is a microSD

card formatted with a Linux

partition and the DisplayID

file wvga.kdb

is located in the root directory. The file size of wvga.kdb amounts 81 bytes.

For loading the file into memory type the following standard U-Boot command lines

mmc rescan 0

ext2load mmc 0 81000000 wvga.kdb

The memory address (0x81000000) is free selectable. With the md command you can control the result

md.b 81000000 80

Now you can load the memory content into the EEPROM. Type the new KONTRON U-Boot command

writedid 81000000 51

The 'count' respectively the size argument is a very important parameter. Do not use another value as the

file size of your DisplayID

file.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 292 293

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