RS232 & MAX232 serial communication

PLZ TELL DETAIL & DATA SHEET IC232 WITH SERIAL COMMUNICATION

PLZ TELL DETAIL & DATA SHEET IC232 WITH SERIAL COMMUNICATION

"PLZ TELL DETAIL & DATA SHEET IC232 WITH SERIAL COMMUNICATION"

DON'T SHOUT!!!!!

(All-capitals is considered SHOUTING!)

I've already posted a link to the manufacturer's website, and an example schematic using the device - what more do you want??!!

"what more do you want??!!"

He wants you to go round to his place and do the entire project for him. I'm tempted to say something about "wiping arses" but that might not be appropriate on this forum.

I'm rapidly reaching the point where I'm going to stop visiting this forum unless Keil start moderating it. These "I'm a lazy cretin, gimme something" posts are starting to outnumber the real ones. What's more, they are almost always off topic - this place is supposed to be for the discussion of Keil tools, not a source of schematics or data sheets.

Keil, here's a suggestion:
Make the "Post" button really small. Alongside it, put a really large button marked "FREE SAMPLE CODES" (uppercase essential). When clicked this should go to a page with links for every appnote on the site. Give all the links names like "FREE SAMPLE SERIAL CODES", "FREE SAMPLE I2C CODES" etc.

Another thing, when the "Post" button is clicked, how about popping up the question "DO YOU WANT FREE SAMPLE CODES?" with two buttons, "Yes" and "No". If "Yes" is clicked, request an email address and email all the appnotes to that address.

Stefan

Case in point, this thread has 55 replies as of today.

www.keil.com/.../thread2288.asp

www.keil.com/.../thread2288.asp

I have often wondered about the "behind the scenes" results of that thread, since originally HUY VU QUANG specified that those requesting examples, do so by e-mail, yet provided no e-mail address to send requests to.

Then you see lots of folks asking for examples, yet providing no e-mail address to receive the examples. Certainly if anyone is at all serious about "examples" they are looking elsewhere too, but maybe that's too much effort.

I'm on vacation but I've been thinking about making certain threads "closed to new posts".

From time to time I do go and delete threads that are non-sensical. Maybe I just need to do more of that.

Jon

I think "closing to new posts" may be a reasonable choice in addition to deleting threads when it makes sense.

To your credit, you have not (in my estimation) been "heavy-handed" about deleting threads, so I'd imagine you would moderate with the same even temper for threads worthy of consideration of the lesser result of "closing to new posts".

One problem with closing or deleting the begging threads may be that these people will start new ones. That will probably be even more irritating.

The very fact that most of these people ask for stuff but don't give an email address shows just how bright they are. I suspect they are mostly students - the type who haven't been to any classes then suddenly find themselves with a project to complete and no idea where to start.

As for that long thread started by somebody offering schematics or something, I'd say that was a troll.

Stefan

There are a couple of things to consider.

1. If I delete a thread like this one (www.keil.com/.../thread2288.asp) or if I make it inactive (no posting allowed) someone may start a new thread.

2. If I leave it live, other people will uselessly post to it. Those of us "in the know" can leave it unread.

Maybe we could implement a voting system that would allow visitors to "rate" a thread. Threads could be marked as useful or useless in the thread list based on the votes they receive. Then, we could more easily decide which threads to prune based on votes.

Jon

Here's my $0.02 USD.

It seems most of the offenders fall into one or both of two categories -- the clueless and the I-wanna's/gimme's (CMS says apostrophizing in this context is acceptable).

The clueless should be tolerated so that they may get one.

The I-wanna's/gimme's should not be tolerated for very long. Those who have what wanna's want should be proactive and put their offerings up on a Web/FTP site and simply link to it, and not be reactive by having to "poll" the threads to see if anybody new needs something.

So there you have it:

• Let the "clueless" threads live unless they are truly incomprehensible
• Kill the "I-wanna/gimme" threads after a short time
• Kill the "I have what wanna's want" threads immediately if it is formed in a way that could end up causing a string of gimme's (i.e., without direct Web/FTP links/URLs or an e-mail address

Hi Jon,

I have done one simple serial rs232 c program in keil and when download in eprom it produce no output on the termulator.This program is to do serial transmission from 8051 to pc.

Here is the code:

/* RS232 SIMPLE TRIAL */

#include <stdio.h>
#include <reg51.h>


/*Function to initialize RS232 serial port*/
void serial_init()
{
	SCON=0X50;		//Setup for 8-bit data
	TMOD=0X20;		//Setup Timer 1 for auto-reload
	TH1=0XFD;		//Setup for 9600 baud
	TR1=1;			//Turn on Timer 1
	T1=1;			//Indicate Ready to Transmit
}

/*This func display a null-terminated string on the rs232 port*/

void send_serial(unsigned char*s)
{
 while(*s!=0x0)
 {
  SBUF=*s;
  while(!T1)
  {  }
  T1=0;
  s++;
  }
}

/*Start of main program*/

main()
{
 unsigned char crlf[]={0x0D,0x0A,0x0};
 serial_init();
 for (;;)
 {
  send_serial("Another test");
  send_serial(crlf);
 }
}