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ethernet module

 
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Tektronix



Joined: 13 Feb 2010
Posts: 4

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ethernet module
PostPosted: Sat Feb 13, 2010 3:08 pm     Reply with quote
I am trying to send serial data to a Parallax Internet Netburner embedded Ethernet module. I am using the PCWH compiler version 4.104. The documentation from Parallax shows how to send serial data to the module using a basic stamp. I am trying to use a pic18f452 chip and the PCWH compiler.
Part of my code is:
Code:

#include <18F452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=10000000)
…..
#use rs232(baud=9600, xmit=PIN_B1, rcv=PIN_B0,STREAM=NET,ERRORS,TIMEOUT=20, BRGH1OK )
….
fprintf (NET,"!NB0W21:TEST");

I do not think that the pins are not switched around because the fprintf statement will work about 60% of the time.
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Sat Feb 13, 2010 3:31 pm     Reply with quote
Quote:

#use rs232(baud=9600, xmit=PIN_B1, rcv=PIN_B0,STREAM=NET,ERRORS,TIMEOUT=20, BRGH1OK )

You're using a software UART. Are you using interrupt routines in your
program ? If so, when interrupts occur, they will disrupt the bit timing of
the software UART. You can prevent that by adding the DISABLE_INTS
parameter to your #use rs232() statement. From the manual:
Quote:

#USE RS232

DISABLE_INTS -
Will cause interrupts to be disabled when the routines get or put a
character. This prevents character distortionfor software implemented
I/O and prevents interaction between I/O in interrupt handlers and the
main program when using the UART.


Quote:

#use rs232(baud=9600, xmit=PIN_B1, rcv=PIN_B0,STREAM=NET,ERRORS,TIMEOUT=20, BRGH1OK )

Also, on a software UART, the parameters shown in bold don't do anything.
The compiler ignores them.
Tektronix



Joined: 13 Feb 2010
Posts: 4

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PostPosted: Sat Feb 13, 2010 4:20 pm     Reply with quote
That was very good information. I wished the manual was a little clearer on which options are for software UART and which are for the hardware UART. I am still having trouble with the Ethernet module. The data is still not showing up. It might be a problem with the Netburner Ethernet module. Thanks again.
jaimechacoff



Joined: 14 Feb 2010
Posts: 24
Location: Santiago, Chile

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PostPosted: Sun Feb 14, 2010 12:14 pm     Reply with quote
hey, I think your problem with the Netburner is because you are connecting it through a router and because that now you cant see the information.

I know this because I have used the Netburner, and I had the same problem and it was just because the Netburner doesnt work under a router.

good luck.
Tektronix



Joined: 13 Feb 2010
Posts: 4

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PostPosted: Sun Feb 14, 2010 5:42 pm     Reply with quote
It’s possible that the netburner does not work well with a router, but not sure. I had the netburner module hooked up using a basic stamp which worked very well. I used the examples from the Parallax web site. Does anyone know an example in which serial data is sent or received from a PIC chip to a basic stamp? The basic stamp commands can send and receive serial data with a delay (pace) option. I am not sure how much delay is actually between characters being sent. What is the best way to send a null character through the serial port?
I have modified the code for the PIC18F452 chips many times and then tested, but still no luck.
Code:
#include <18F452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=10000000)
#define CLS 0
#use rs232(baud=9600, xmit=PIN_B1, rcv=PIN_B0,stream=net,errors,timeout=20,disable_ints )
void main
 fprintf (net," !NB0W04:WORKS OK \0");   
 fprintf (net," !NB0W04:WORKING OK%s",CLS);   
  while(TRUE){   
  }   
      fprintf (net," !NB0W04:Test");
      delay_ms(1000);                 
     
     }
jaimechacoff



Joined: 14 Feb 2010
Posts: 24
Location: Santiago, Chile

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PostPosted: Mon Feb 15, 2010 5:42 am     Reply with quote
Hi Tektronix,

Is this your Netburner?:

http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/PINK/List/0/SortField/4/ProductID/40/Default.aspx

If that one is yours, you should take a look of this:

http://www.parallax.com/Portals/0/Downloads/docs/prod/comm/30013-PINKdocs-v2.1.pdf

and in the first page says:

Quote:

You should also understand firewalls and functionality of any router or switch in your network as well as how the settings may affect network traffic with the PINK.


I would like to help you more, but I program PICs in Basic and I am just learning about CCS C.

bye.
Tektronix



Joined: 13 Feb 2010
Posts: 4

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PostPosted: Mon Feb 15, 2010 7:30 pm     Reply with quote
The netburner displays the web pages just fine with the router setup I have. I just trouble getting the PIC18F452 to update variables on the displayed web pages. The same netburner with a basic stamp does update the variables as expected with basic code.
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