PIC to LCD wiring problem ? - Page 2 - Electronic Circuits Projects Diagrams Free

blueroomelectronics · 3rd October 2007, 05:56 PM

What error do you get? It fails to verify? What type of programmer are you using?

Also use the mangage attachments instead of some bizzare remote site, just zip them and post here.

PS I downloaded you .asm file, what did you edit it with? It's unreadable.

PPS all black squares on an LCD might mean too high a contrast, you should put the 20K pot on the design, usually one line of dark (not black) squares on a 2x16 LCD is about right. Both you'll never see anything. It varies from LCD to LCD and temperature.

pasanlaksiri · 3rd October 2007, 06:09 PM

Quote:

Originally Posted by blueroomelectronics

What error do you get? It fails to verify? What type of programmer are you using?

Also use the mangage attachments instead of some bizzare remote site, just zip them and post here.

Quote:

Also use the mangage attachments instead of some bizzare remote site

I hv never been use that b4. Thats y i fogot that. Sorry

Quote:

What error do you get? It fails to verify? What type of programmer are you using?

Yes its fail to verify,

My programmer is Multi PIC Programmer 5v2.

I programm same PIC using that programmer perfectly

ericgibbs · 3rd October 2007, 06:17 PM

hi,

Like Bill found, it will not assemble. its full of worms, where did you get it from?

pasanlaksiri · 3rd October 2007, 06:26 PM

Quote:

Originally Posted by ericgibbs

hi,

Like Bill found, it will not assemble. its full of worms, where did you get it from?

http://www.thouters.be/PicAlarmClock

Hmmmm

Shit I waist my time on this.

mvs sarma · 3rd October 2007, 07:50 PM

Quote:

Originally Posted by pasanlaksiri

http://www.thouters.be/PicAlarmClock

Hmmmm

Shit I waist my time on this.

Please hold patience

please send a detail of what pins you have connected for the 10 wire cable clearly indicating cross connections of the pin numbers of 16 pin LCD display .

let us see, afterall the site gave so many photos to make me atleast feel that genuine effort was there.
Take little more pains

pasanlaksiri · 3rd October 2007, 08:03 PM

Quote:

Originally Posted by mvs sarma

Please hold patience

please send a detail of what pins you have connected for the 10 wire cable clearly indicating cross connections of the pin numbers of 16 pin LCD display .

let us see, afterall the site gave so many photos to make me atleast feel that genuine effort was there.
Take little more pains

PIC Pins / LCD Pins
RB0 - 11 (D4)
RB1 - 12 (D5)
RB2 - 13 (D6)
RB3 - 14 (D7)
RB4 - 04 (RS)
RB5 - 06 (E)
- 05 (R/W) ( Ground )
- 01 ( Ground )
- 02 ( Vcc )
- 03 ( Vo ) ( i use 20K Preset here )

pasanlaksiri · 3rd October 2007, 08:09 PM

Quote:

Originally Posted by blueroomelectronics

PS I downloaded you .asm file, what did you edit it with? It's unreadable.

.

Here is the original files. There is lots of jal files in it

mvs sarma · 3rd October 2007, 09:39 PM

Quote:

Originally Posted by pasanlaksiri

PIC Pins / LCD Pins
RB0 - 11 (D4)
RB1 - 12 (D5)
RB2 - 13 (D6)
RB3 - 14 (D7)
RB4 - 04 (RS)
RB5 - 06 (E)
- 05 (R/W) ( Ground )
- 01 ( Ground )
- 02 ( Vcc )
- 03 ( Vo ) ( i use 20K Preset here )

Connect buffered RC2(PIC-17) (that is resistor R7 at pin 10 of the pcb connctor JP1.) to pin 16 of the LCD

then youmay maintain 1V DC approx on pin3 ( contrast) some where beteen 0.9 to 1.2 the display will be clear.
All the best

mvs sarma · 3rd October 2007, 09:44 PM

Quote:

Originally Posted by blueroomelectronics

.................

PS I downloaded you .asm file, what did you edit it with? It's unreadable.

......................

Hi Bill,
Try reading the .asm or .jal files with winXP "Wordpad" they open up neatly

pasanlaksiri · 4th October 2007, 01:52 AM

Quote:

Originally Posted by mvs sarma

Connect buffered RC2(PIC-17) (that is resistor R7 at pin 10 of the pcb connctor JP1.) to pin 16 of the LCD

then youmay maintain 1V DC approx on pin3 ( contrast) some where beteen 0.9 to 1.2 the display will be clear.
All the best

THX but my prob is I can program the chip. Its always fail to verify.

mvs sarma · 4th October 2007, 07:59 AM

you have the HEX file and it should load

as yopu are using the MultiPIC prog,let me veify--the settings with winpic800- there is a latest ver 1.62

BTW, are you sure that the Vpp is proper at above 12.5V or as perscribed in F877 datasheet for programming?
If needed try replacing the electrolytics to 220µ F

whether your PC is suppoeting the proper voltages? i shall be back with you

don't worry

mvs sarma · 4th October 2007, 09:12 AM

Hi Pasan, please see the site below and some of the comments are extracted from there and pasted here. perhaps you have to use winpic or winpic800 for programming f877 where as f877A is programmable by ic-prog.

http://feng3.cool.ne.jp/en/pg5v2.html

PIC16F870(8),PIC16F871(8),PIC16F872,PIC16F873,PIC1 6F874(4),PIC16F876(5),PIC16F877(5)

PIC16F873A(5),PIC16F874A(5),PIC16F876A,PIC16F877A

(5) IC-Prog cannot program/verify/erase these devices with Multi PIC Programmer 5V2. Please use WinPic.

pasanlaksiri · 4th October 2007, 11:27 AM

Quote:

Originally Posted by mvs sarma

Hi Pasan, please see the site below and some of the comments are extracted from there and pasted here. perhaps you have to use winpic or winpic800 for programming f877 where as f877A is programmable by ic-prog.

http://feng3.cool.ne.jp/en/pg5v2.html

PIC16F870(8),PIC16F871(8),PIC16F872,PIC16F873,PIC1 6F874(4),PIC16F876(5),PIC16F877(5)

PIC16F873A(5),PIC16F874A(5),PIC16F876A,PIC16F877A

(5) IC-Prog cannot program/verify/erase these devices with Multi PIC Programmer 5V2. Please use WinPic.

Hi

Im trying to Program PIC16F877A

But I program same chip b4 properly using multi Pic 5V2

mvs sarma · 4th October 2007, 11:29 AM

Hi Pasan,
I did very minor changes and I was able to compile the file . a set of files is zipped and attached here. now please see whether you can programme it

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3rd October 2007, 05:56 PM	(permalink)
blueroomelectronics	What error do you get? It fails to verify? What type of programmer are you using? Also use the mangage attachments instead of some bizzare remote site, just zip them and post here. PS I downloaded you .asm file, what did you edit it with? It's unreadable. PPS all black squares on an LCD might mean too high a contrast, you should put the 20K pot on the design, usually one line of dark (not black) squares on a 2x16 LCD is about right. Both you'll never see anything. It varies from LCD to LCD and temperature. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com Last edited by blueroomelectronics; 3rd October 2007 at 06:02 PM.

3rd October 2007, 06:17 PM	(permalink)
ericgibbs	hi, Like Bill found, it will not assemble. its full of worms, where did you get it from? __________________ Eric "Good enough is Perfect" PIC tutorials: Gramo's: www.digital-diy.net/ Bill's: www.blueroomelectronics.com/

4th October 2007, 07:59 AM	(permalink)
mvs sarma	you have the HEX file and it should load as yopu are using the MultiPIC prog,let me veify--the settings with winpic800- there is a latest ver 1.62 BTW, are you sure that the Vpp is proper at above 12.5V or as perscribed in F877 datasheet for programming? If needed try replacing the electrolytics to 220µ F whether your PC is suppoeting the proper voltages? i shall be back with you don't worry __________________ Regards, Sarma.

4th October 2007, 09:12 AM	(permalink)
mvs sarma	Hi Pasan, please see the site below and some of the comments are extracted from there and pasted here. perhaps you have to use winpic or winpic800 for programming f877 where as f877A is programmable by ic-prog. http://feng3.cool.ne.jp/en/pg5v2.html PIC16F870(8),PIC16F871(8),PIC16F872,PIC16F873,PIC1 6F874(4),PIC16F876(5),PIC16F877(5) PIC16F873A(5),PIC16F874A(5),PIC16F876A,PIC16F877A (5) IC-Prog cannot program/verify/erase these devices with Multi PIC Programmer 5V2. Please use WinPic. __________________ Regards, Sarma.

4th October 2007, 11:29 AM	(permalink)
mvs sarma	Hi Pasan, I did very minor changes and I was able to compile the file . a set of files is zipped and attached here. now please see whether you can programme it __________________ Regards, Sarma. Last edited by mvs sarma; 7th July 2008 at 01:12 PM.