Post by thread:[PICLIST] [PIC] Can Someone help me with the USAR

part 1 3603 bytes content-type:multipart/alternative; (decoded quoted-printable) ------ 2000\12\02@055606 by Heinz Czychun Hi Jeethu, While I have no experience with hardware USARTs, but a quick look at your code shows a problem. There is nothing to stop the main code from crashing through to the "rxed" subroutine, then when it gets to the return it's off on it's own and well, who knows. Surely not what you wanted. I believe an endless loop after the BSF INTCON,GIE ;I also forgot this BSF INTCON,PEIE ;Yes, This too is required instructions would be in order. Heinz At 1:57 PM 11/2/2000, Jeethu Rao wrote: {Quote hidden}>Hi there all PICLIST Members, > >I am quite new to the PIClist as well as the PIC16F877. I code in >assembly. And after reading all the relevant Data Sheets and Documents >provided by Microchip, I wrote the source code I've attached to this >message as a zip file. Everything seems to be Ok. But when I write this >code on the PIC and test it with a Terminal Program, I get a lot of >errors. >Basically the only function of this test code is to echo whatever it gets >back. All the hardware aspects like the MAX232 and the Computer UART seem >to to be ok. > >...< html snipped>.... -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam@spam@mitvma.mit.edu 2000\12\02@091855 by mike On Thu, 2 Nov 2000 13:57:53 +0530, you wrote: >Hi there all PICLIST Members, > >I am quite new to the PIClist as well as the PIC16F877. I code in assembly. And after reading all the relevant Data Sheets and Documents provided by Microchip, I wrote the source code I've attached to this message as a zip file. Everything seems to be Ok. But when I write this code on the PIC and test it with a Terminal Program, I get a lot of errors. >Basically the only function of this test code is to echo whatever it gets back. All the hardware aspects like the MAX232 and the Computer UART seem to to be ok. > >Here are the info you would ask for > >Clock Speed 5.00 Mhz > >Baudrate:- 2400bps > >SPBRG Value 0x81 >(High Speed Baudrate Geterator Mode) > >Actual Baudrate: 2403.xx > >The Error Probability Seems to be less than 1% but still, the errors are practically much more frequent. Baudrate error is not a probability, just a figure to add to the whole system error budget. If your total error is within spec (5-10%, depending on the receive sampling method) the probability of errors should be zero. If out of spec it will be 100% on certain data vaues. You should have no data errors with a 1% baudrate error. -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestKILLspammitvma.mit.edu More... (looser matching) - Last day of these posts - In 2000 , 2001 only - Today - New search...