<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7653.38"> <TITLE>X Windows Porting and Questions</TITLE> </HEAD> <BODY>  <P DIR=LTR><SPAN LANG="en-us"><FONT FACE="Calibri">We are putting X Windows on an embedded platform</FONT></SPAN><SPAN LANG="en-us"><FONT FACE="Calibri"> with a touch screen. The embedded</FONT></SPAN><SPAN LANG="en-us"> <FONT FACE="Calibri">platform</FONT></SPAN><SPAN LANG="en-us"><FONT FACE="Calibri"> has a 300Mhz CPU so we are working on ways to improve performance. We have written a framebuffer driver for the LCD. We understand that X Windows maps the video memory into userspace and then modifies the</FONT></SPAN><SPAN LANG="en-us"> <FONT FACE="Calibri">userspace</FONT></SPAN><SPAN LANG="en-us"> <FONT FACE="Calibri">memory</FONT></SPAN><SPAN LANG="en-us"><FONT FACE="Calibri"> with the images for the screen. As it is we have to use a shadow buffer in our driver and move out the pixel information to the LCD. It would be nice if X Windows would tell</FONT></SPAN><SPAN LANG="en-us"> <FONT FACE="Calibri">us (via an ioctl or something) which rectangle(s) in the screen have changed. As it is now we have to write the entire buffer every time to the LCD.</FONT></SPAN><SPAN LANG="en-us"> <FONT FACE="Calibri"> We need to know where in</FONT></SPAN><SPAN LANG="en-us"><FONT FACE="Calibri"> the X Windows code this framebuffer is modified so we can add code to tell our driver exactly what rectangle(s) have changed.</FONT></SPAN></P> <P DIR=LTR><SPAN LANG="en-us"><FONT FACE="Calibri">Also we are using Linux 2.6.10 and X Windows 6.8. The touch screen support in 6.8 is not</FONT></SPAN><SPAN LANG="en-us"><FONT FACE="Calibri"> finished we know. Currently we are using the tslibdev.c touchscreen driver but can</FONT></SPAN><SPAN LANG="en-us"><FONT FACE="Calibri">’</FONT></SPAN><SPAN LANG="en-us"><FONT FACE="Calibri">t get it to track well to the LCD (yes we did calibrate it). Any suggestions on how to get a touch screen to work with 6.8 would be helpful also.</FONT></SPAN></P> <P DIR=LTR><SPAN LANG="en-us"></SPAN></P> <P DIR=LTR><SPAN LANG="en-us"><FONT FACE="Calibri">Thx,</FONT></SPAN></P> <P DIR=LTR><SPAN LANG="en-us"><FONT FACE="Calibri">K-</FONT></SPAN><SPAN LANG="en-us"></SPAN></P> <P DIR=LTR><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=1 FACE="Tahoma">_____________________________________________</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT FACE="Times New Roman"><BR> </FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=1 FACE="Tahoma">Kyle Unice</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT FACE="Times New Roman"><BR> </FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=1 FACE="Tahoma">L-3 Communications / Communication Systems - West</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT FACE="Times New Roman"><BR> </FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=1 FACE="Tahoma">Senior Staff Engineer - Rapid Product Development</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT FACE="Times New Roman"><BR> </FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=1 FACE="Tahoma">322 North 2200 West Dock 3 MS F1J12</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT FACE="Times New Roman"><BR> </FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=1 FACE="Tahoma">Salt Lake City, UT 84116-</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=1 FACE="Arial">2988</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT FACE="Times New Roman"> </FONT></SPAN></P> <P DIR=LTR><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=1 FACE="Tahoma">Voice: (801) 594-2687</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT FACE="Times New Roman"><BR> </FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=1 FACE="Tahoma">Fax: (801) 594-2980</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT FACE="Times New Roman"> </FONT></SPAN></P> <P DIR=LTR><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN></P> <P DIR=LTR><SPAN LANG="en-us"></SPAN></P> </BODY> </HTML>