please dont rip this site

This code was developed by Ken Webster for his Time Source Monitoring Test System

14-bit core PIC source:

PC Windows NT or 95 or 98 source to talk to PIC:

Uses CRC and checksum and packet serial number to detect corrupt or missing packets. Chop out code that supports channels if you only need one device connected (this app is for connecting multiple devices via a multiplexer). If need help feel free to email me at ken@webster.org

; Apply W to command-interpreter receive checksums
update_crx_checksums    xorwf           rCmdxs,F          ;update plain checksum
                        xorwf           rCmdcl,F          ;update cyclic checksum
                        addwf           rCmdch,F
                        bcf             STATUS,C
                        rrf             rCmdch,F
                        btfsc           rCmdcl,0
                        bsf             rCmdch,7
                        rrf             rCmdcl,F
                        movlw           0x31
                        addwf           rCmdcl,F
                        btfsc           STATUS,C
                        incf            rCmdch,F
                        movlw           0x03
                        addwf           rCmdch,F                        return

void Checksum::Add(unsigned char c){    plain_checksum ^= c;
    cyclic_checksum ^= c;    cyclic_checksum += (unsigned short)c << 8;
    bool carry = (cyclic_checksum & 1) ? true : false;    cyclic_checksum >>= 1;
    cyclic_checksum |= carry ? 0x8000 : 0;    cyclic_checksum += 817;}

file: /Techref/scenix/lib/io/osi2/serial/sermux.htm, 2KB, , updated: 2000/5/3 12:54, local time: 2024/11/8 17:49,
TOP NEW HELP FIND: 
3.144.17.207:LOG IN
©2024 PLEASE DON'T RIP! THIS SITE CLOSES OCT 28, 2024 SO LONG AND THANKS FOR ALL THE FISH!

 ©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF="http://sxlist.com/Techref/scenix/lib/io/osi2/serial/sermux.htm"> Ken Websters PIC16C74 serial port multiplexer. </A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

 

Welcome to sxlist.com!


Site supported by
sales, advertizing,
& kind contributors
just like you!

Please don't rip/copy
(here's why

Copies of the site on CD
are available at minimal cost.
 
Here is a great gift for computer geeks or widows:
The Backwoods Guide to Computer Lingo

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .