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Discussion Groups | Piclist | 9 wire RS232
A discussion group for the PICMicro microcontroller. Also called the Microchip PIC, this list is dedicated to the use and abuse of this fine, simple, microcontroller. Close to topic posts are welcome, ie. general electronics.
9 wire RS232 - Scott Lingerfelt - Dec 3 20:31:00 2003
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Anyone, I am trying to connect to a GSM modem model GM28 from Sony Ericsson. They note that I require a 9 wire RS232 connection to communicate with the modem. Am I correct in thinking that the SMS band is always on so I do not require RTS (ready to send) pin on the modem and only run the carrier detect pin directly to my PIC pin? I have searched the archives and found nothing on this. Does anyone have an wiring example. Thanks in advance, ************************************** Scott Lingerfelt ************************************** --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.545 / Virus Database: 339 - Release Date: 11/27/2003 |
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RE: 9 wire RS232 - Dave Moore - Dec 3 21:20:00 2003
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I wonder if they mean "db9" instead of "9 wire"? In other words,
not really 9 physical connections, but a db9 connector? Dunno what that GM28 is really going to want (check the manual). If it needs to know DTR and RTS from your device, just tie them low (usually active low pins). I would think that DCD would go low as soon as the modem syncs up with the base station. Read it from the input pin to know when "something" is ready (again, the manual should tell you.) If it were me, I'd run all the inputs from the modem into the pic and use them appropriately. I'd also run the appropriate outputs to the modem from the pic. GL - Dave > -----Original Message----- > From: Scott Lingerfelt [mailto:] > Sent: Wednesday, December 03, 2003 5:31 PM > To: Piclist > Subject: [piclist] 9 wire RS232 > > Anyone, > > I am trying to connect to a GSM modem model GM28 from Sony > Ericsson. They note that I require a 9 wire RS232 connection > to communicate with the modem. Am I correct in thinking that > the SMS band is always on so I do not require RTS (ready to > send) pin on the modem and only run the carrier detect pin > directly to my PIC pin? I have searched the archives and > found nothing on this. Does anyone have an wiring example. > > Thanks in advance, > > ************************************** > Scott Lingerfelt > > ************************************** > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.545 / Virus Database: 339 - Release Date: 11/27/2003 > ------------------------ Yahoo! Groups Sponsor > ---------------------~--> Buy Ink Cartridges or Refill Kits > for your HP, Epson, Canon or Lexmark Printer at MyInks.com. > Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/dN_tlB/TM ---------------------------------------------------------------------~-> to unsubscribe, go to http://www.yahoogroups.com and follow the instructions |
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Convert program code from 16F84 to 16F628?? - Shawn McClintock - Dec 4 2:00:00 2003
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How hard would it be to port a program written for the 16F84 to a 16F628? Any big changes need made? Or can I just recompile with new processor selection and appropriate changes in code for device type? Shawn |
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Re: Convert program code from 16F84 to 16F628?? - Rick C. - Dec 4 7:23:00 2003
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Check these sites for your answer:
http://www.dontronics.com/cat_hard_micro_pic.html#628spec http://www.finitesite.com/d3jsys/16F628.html Rick C. Shawn McClintock wrote:
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RE: Convert program code from 16F84 to 16F628?? - Shawn McClintock - Dec 4 13:50:00 2003
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Thanks
Rick,
Since my program is in C I should be fine, the compiler should
take note of the minor differences and put it together appropriately.
Thanks
for the info!
Shawn
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