UART enabling using PIC 16f877 - Electronic Circuits Projects Diagrams Free

olympus123456 · 22nd May 2009, 02:32 PM

Hi , i want to use the PIC and interface it using rs-232 cable and display it on visual basic.
I m attaching my code in the notepad. please can some one help .

Pommie · 22nd May 2009, 03:10 PM

I've had a quick look at your code and you have written a lot of code. You seem to have a good grasp of general programming but there are some obvious errors in your code. You don't save or restore the context in your ISR and you don't have a retfie at the end of it. My suggestion is that you try to get simple programs working first and work up to something as complex as you posted.

Mike.

olympus123456 · 22nd May 2009, 03:35 PM

I am using this code for real time display in the computer through visual basic and rs-232 cable. I have successfully created hex file and build was succesful too. If you could help in writing it , please bcuz i have put a lot of effort , i would be grateful if someone could help me fix it. pleaseeeee.

ericgibbs · 22nd May 2009, 03:40 PM

Quote:

Originally Posted by olympus123456

I am using this code for real time display in the computer through visual basic and rs-232 cable. I have successfully created hex file and build was succesful too. If you could help in writing it , please bcuz i have put a lot of effort , i would be grateful if someone could help me fix it. pleaseeeee.

WHY have you started a new thread while Im still answering your first one.

PIC16877 question about converting to Hex file

olympus123456 · 22nd May 2009, 03:43 PM

its because i got nervous after all this of writing the program sweating and crying and all this , i find out that something is missing . i felt broken . i really need to finish this by may end . i m sorry dude.

ericgibbs · 22nd May 2009, 03:44 PM

Quote:

Originally Posted by olympus123456

its because i got nervous after all this of writing the program sweating and crying and all this , i find out that something is missing . i felt broken . i really need to finish this by may end . i m sorry dude.

I'm sweating and crying trying to help you sort out the program, dont be so impatient, Im not on the clock.

olympus123456 · 22nd May 2009, 03:47 PM

sorry eric. i m soo sorry , i know i bcame impatient bcuz of 3 months of work on this code dude. really thank you soo much . lastly, shuld i just the code that u wrote in the top or end. how does it work . if u dont mind could u tell me .

blueroomelectronics · 22nd May 2009, 03:54 PM

Can you post a schematic of your device. Have you built it yet?

PS your PK2 can debug the 16F877 this may help with working the bugs out.

olympus123456 · 22nd May 2009, 04:09 PM

I have not yet completed it . i need some more time , because i have to find photoelectric sensors , ecg electrodes . I am attaching the schematic of the circuit , its not in eletronic workbench its drawn by hand.

blueroomelectronics · 22nd May 2009, 04:27 PM

You've only got a week to finish the schematic (post it as we can help spot errors like missing bypass caps etc) get parts, program, built and test it. Good luck.

olympus123456 · 22nd May 2009, 04:32 PM

i have posted it .

blueroomelectronics · 22nd May 2009, 04:44 PM

That's the program not the schematic.

PS if you don't comment your code it's very difficult to follow.

olympus123456 · 22nd May 2009, 04:50 PM

Its ok blueroom , i got to hex file and ERIC helped me in enabling the pins. I m posting the schematic. I hope programming the PIC is solved , still i have to send it to the PIC . i bought pickit 2 , but i dont know how to proceed, how to send the hex file to the PIC. if you can help me on that.
Also about visual basic, do u have any knowledge of it ?

blueroomelectronics · 22nd May 2009, 04:58 PM

Well you will need 0.1uF decoupling caps near the VDD, VSS pins. 16V caps will work with the MAX232.

You have to connect the PK2 to VPP, VDD, VSS, PGC & PGD it will also debug if you leave it connected.

olympus123456 · 22nd May 2009, 05:09 PM

I will continue working on it tomorrow sort of exhausted and damn tired , thank blueroom and others. be back tomorrow.

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22nd May 2009, 03:10 PM	#2
Pommie	I've had a quick look at your code and you have written a lot of code. You seem to have a good grasp of general programming but there are some obvious errors in your code. You don't save or restore the context in your ISR and you don't have a retfie at the end of it. My suggestion is that you try to get simple programs working first and work up to something as complex as you posted. Mike.

22nd May 2009, 03:35 PM	#3
olympus123456	I am using this code for real time display in the computer through visual basic and rs-232 cable. I have successfully created hex file and build was succesful too. If you could help in writing it , please bcuz i have put a lot of effort , i would be grateful if someone could help me fix it. pleaseeeee.

22nd May 2009, 03:43 PM	#5
olympus123456	its because i got nervous after all this of writing the program sweating and crying and all this , i find out that something is missing . i felt broken . i really need to finish this by may end . i m sorry dude.

22nd May 2009, 03:47 PM	#7
olympus123456	sorry eric. i m soo sorry , i know i bcame impatient bcuz of 3 months of work on this code dude. really thank you soo much . lastly, shuld i just the code that u wrote in the top or end. how does it work . if u dont mind could u tell me .

22nd May 2009, 03:54 PM	#8
blueroomelectronics	Can you post a schematic of your device. Have you built it yet? PS your PK2 can debug the 16F877 this may help with working the bugs out. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

22nd May 2009, 04:09 PM	#9
olympus123456	I have not yet completed it . i need some more time , because i have to find photoelectric sensors , ecg electrodes . I am attaching the schematic of the circuit , its not in eletronic workbench its drawn by hand. Attached Thumbnails Last edited by olympus123456; 22nd May 2009 at 04:31 PM.

22nd May 2009, 04:27 PM	#10
blueroomelectronics	You've only got a week to finish the schematic (post it as we can help spot errors like missing bypass caps etc) get parts, program, built and test it. Good luck. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

22nd May 2009, 04:44 PM	#12
blueroomelectronics	That's the program not the schematic. PS if you don't comment your code it's very difficult to follow. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

22nd May 2009, 04:50 PM	#13
olympus123456	Its ok blueroom , i got to hex file and ERIC helped me in enabling the pins. I m posting the schematic. I hope programming the PIC is solved , still i have to send it to the PIC . i bought pickit 2 , but i dont know how to proceed, how to send the hex file to the PIC. if you can help me on that. Also about visual basic, do u have any knowledge of it ? Attached Thumbnails

22nd May 2009, 04:58 PM	#14
blueroomelectronics	Well you will need 0.1uF decoupling caps near the VDD, VSS pins. 16V caps will work with the MAX232. You have to connect the PK2 to VPP, VDD, VSS, PGC & PGD it will also debug if you leave it connected. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/ Last edited by blueroomelectronics; 22nd May 2009 at 04:59 PM.

22nd May 2009, 05:09 PM	#15
olympus123456	I will continue working on it tomorrow sort of exhausted and damn tired , thank blueroom and others. be back tomorrow.