PIC IP: Internet Protocol I/O

Calculating IP Checksums

; enter with "b" in W

ipsum_running:

    incf   ipcksum_b,f
    btfss  ipcksum_b,0
     goto  l1

    addwf  ipcksum_h,f
    skpnc
     incfsz  ipcksum_l,f
    return
    incf  ipcksum_h,f
    return

l1:
    addwf  ipcksum_l,f
    skpnc
     incfsz  ipcksum_h,f
    return
    incf  ipcksum_l,f
    return

see:

PICList Thread '[PIC]: IP Checksum coding challenge ?'

file: /techref/microchip/ipsums.htm, 1KB, , updated: 2006/3/4 03:34, local time: 2008/11/21 21:34,

^{38.103.63.59:LOG IN}

©2008 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!
<A HREF="http://piclist.org/techref/microchip/ipsums.htm"> PIC IP: Internet Protocol I/O - Calculating IP Checksums</A>

Did you find what you needed?

"No. I'm looking for: "
"No. Take me to the search page."
"No. Take me to the top so I can drill down by catagory"
"No. I'm willing to pay for help, please refer me to a qualified consultant"
"No. But I'm interested. me at when this page is expanded."

PICList 2008 contributors:
o List host: MIT, Site host massmind.org, Top posters @20081121 Apptech, Jinx, Xiaofan Chen, olin piclist, Vitaliy, William \Chops\ Westfield, Tamas Rudnai, Alan B. Pearce, JonnyMac, Gerhard Fiedler,
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Shultz Electronics, Timothy Weber, on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.