how i prepare a c++ code(c code) for implementing my own protocol format


 
Thread Tools Search this Thread
Top Forums Programming how i prepare a c++ code(c code) for implementing my own protocol format
# 1  
Old 08-10-2007
how i prepare a c++ code(c code) for implementing my own protocol format

helo my protocol format is given below

{ destno,mode,no.of packet,pktsize,,pktno,textsize,CRC}
description:- { is starting flag
destno - 4bytes
mode - 1 byte
no.of pkt - 4byes
pktsize - 6 bytes
pktno 3 bytes
text size 6 bytes
CRC is 2 bytes
i want to write c++ code(or c code) to prepare this packet and after this
i want to transfer this packet over serial port.
after that how i write a code to receive this packet from serial port and how i extract this packet after receiving the packet.
Regards,
Amit
# 2  
Old 09-07-2007
You need six bytes for a packet size? Wow.

Do you have code to generate and check CRCs?

sending side

Code:
len=call_generate_crc(buf,len);
write(fd,buf,len);

at receiving side

Code:
while (1)
{
    if (read(fd,buf,1) !=1) exit(1);
    if (buf[0]==start_of_packet) break;
}
..... /*read rest of packet */

check_crc(buf,len);

Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. What is on Your Mind?

YouTube: How to Use Code Tags and Format Posts @UNIX.com

By special request, and long overdue, I have updated our "code tags" video and so now we have: How to Use Code Tags and Format Posts @UNIX.com in 4K https://youtu.be/4BuPvWJV__k (3 Replies)
Discussion started by: Neo
3 Replies

2. UNIX for Beginners Questions & Answers

Sqlplus code format

Hi, I have some questions about sqlplus running from bash. I am still new and learning. I have the code shown below: echo "exit" | sqlplus... (10 Replies)
Discussion started by: mohca2020
10 Replies

3. Shell Programming and Scripting

Perl code to grep a particular column in CSV format

Hi I want to grep a column 6 & column 7 from a CSV Format file & then i have to find the difference between these columns as these both columns contains date & time in 7/7/2012 9:20 this format . So kindly help me out ASAP. But please kindly dis xls has to be converted in csv format as may... (5 Replies)
Discussion started by: Prateek@123
5 Replies

4. Shell Programming and Scripting

perl code-sequence of json format

Hi All , Below is the perl code. from below code want to confirm one thing that wahtever the sequence of data we are passing through json format which contains 3 tuples of different sequences Eg: ParentID,SystemID,SendingTime,Time,ClientLocation,ClientID, ... (1 Reply)
Discussion started by: aish11
1 Replies

5. Shell Programming and Scripting

need code for date which is in yyyy-mm-dd format

Hi, I am having one log files. contains som data according to date. And it is going to append .Eg:abc.log contains below data 2011-10-19 abjhgj 2011-10-19 gjhgjgj 2011-10-20 hhhjh 2011-10-20 hhhhjj 2011-10-21 gg . . . 2011-11-24 yyy from log files i want catch only... (2 Replies)
Discussion started by: aish11
2 Replies

6. Programming

Basic perl code- Date format

Hi friends, Please see the below code carefully. ======================================================= # Get batch date and Ord range open OR,$ARGV; while (<OR>) { # find the batch date next if length $_ < 3; # BLANK LINE # last if $. > 120; # sample should be good enough... (2 Replies)
Discussion started by: pspriyanka
2 Replies

7. Shell Programming and Scripting

format code error out using bash script beautifer...

hello all, In refrence to below thread...i am trying to format code using ruby beautifer.... as its mentions....below is the link https://www.unix.com/shell-programming-scripting/101398-code-formatter-shell-script.html It says use Bash Script... (1 Reply)
Discussion started by: abdul.irfan2
1 Replies

8. Shell Programming and Scripting

Grep, then format then prepare a string

Hi I have a file which is having line like below Personal Unit=AU003 (Industrial Products Division),Plant=B00089,Departmant=D110 When ever i fine line starting sith Personal Unit and contains Plant Department I need to pick this line and format it like Personal Unit=AU003 ... (7 Replies)
Discussion started by: krishna.fuji
7 Replies

9. HP-UX

SFTP Protocol: How to transfer the file in PC Format

Hi, We are facing issue with files transfered using SFTP in Hp-UX. The transfered files are in Unix Format. That is, file format as UNIX (LF) instead of a PC format (CR & LF). How can we achieve file transfers as PC format using SFTP? Your help and input will be highly appreciated. ... (2 Replies)
Discussion started by: brap45
2 Replies
Login or Register to Ask a Question