LCD and EDE702
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Posts: 46,084
Hello All!
I just purchased an EDE702 lcd interface IC, and a 16x2 led that says
"ORION" on the back with "HD44780A00" on the lcd's chip. I have
connected the ede702 to the lcd as per the instructions (although I
am using a BSII). When I run a program to output text to the lcd, it
does nothing. The lcd lights up when power is applied so I assume it
is working properly. I am wondering if the hookup diagram that came
with the ede702 applies to my particular lcd. The pin functions for
my lcd are as follows:
Pin # Function
1 GND
2 +5
3 Liquid crystal driving voltage
4 RS
5 R/W
6 Enable
7 thru 14 Data Bus Line 0 thru 7
15 Anode
16 Cathode
The led's insructions states that the led is powered thru pins 15 &
16, so what good are pins 1 & 2?
Here is the little BSII prg I am using to test it with:
pause 500
serout 7,2400,[noparse][[/noparse]$fe]
serout 7,2400, [noparse][[/noparse]$01]
pause 10
serout 7,2400,[noparse][[/noparse]"Hello World!"]
serout 7,2400,[noparse][[/noparse]$fe]
serout 7,2400, [noparse][[/noparse]$c0]
pause 10
serout 7,2400,[noparse][[/noparse]"Line 2!"]
(I assume this program will output text to both lines of the lcd)
I hope my questions arent dumb, and I apologise for the length of
this
post, but I would love to get this going, and am having no luck on my
own.
I appreciate any help you guys can offer.
Thanks!
Stampboi
I just purchased an EDE702 lcd interface IC, and a 16x2 led that says
"ORION" on the back with "HD44780A00" on the lcd's chip. I have
connected the ede702 to the lcd as per the instructions (although I
am using a BSII). When I run a program to output text to the lcd, it
does nothing. The lcd lights up when power is applied so I assume it
is working properly. I am wondering if the hookup diagram that came
with the ede702 applies to my particular lcd. The pin functions for
my lcd are as follows:
Pin # Function
1 GND
2 +5
3 Liquid crystal driving voltage
4 RS
5 R/W
6 Enable
7 thru 14 Data Bus Line 0 thru 7
15 Anode
16 Cathode
The led's insructions states that the led is powered thru pins 15 &
16, so what good are pins 1 & 2?
Here is the little BSII prg I am using to test it with:
pause 500
serout 7,2400,[noparse][[/noparse]$fe]
serout 7,2400, [noparse][[/noparse]$01]
pause 10
serout 7,2400,[noparse][[/noparse]"Hello World!"]
serout 7,2400,[noparse][[/noparse]$fe]
serout 7,2400, [noparse][[/noparse]$c0]
pause 10
serout 7,2400,[noparse][[/noparse]"Line 2!"]
(I assume this program will output text to both lines of the lcd)
I hope my questions arent dumb, and I apologise for the length of
this
post, but I would love to get this going, and am having no luck on my
own.
I appreciate any help you guys can offer.
Thanks!
Stampboi
Comments
>Hello All!
>
>I just purchased an EDE702 lcd interface IC, and a 16x2 led that says
>"ORION" on the back with "HD44780A00" on the lcd's chip. I have
>connected the ede702 to the lcd as per the instructions (although I
>am using a BSII). When I run a program to output text to the lcd, it
>does nothing. The lcd lights up when power is applied so I assume it
>is working properly. I am wondering if the hookup diagram that came
>with the ede702 applies to my particular lcd. The pin functions for
>my lcd are as follows:
>
>Pin # Function
>
>1 GND
>2 +5
>3 Liquid crystal driving voltage
>4 RS
>5 R/W
>6 Enable
>7 thru 14 Data Bus Line 0 thru 7
>15 Anode
>16 Cathode
>
>The led's insructions states that the led is powered thru pins 15 &
>16, so what good are pins 1 & 2?
>
>Here is the little BSII prg I am using to test it with:
>
> pause 500
>
> serout 7,2400,[noparse][[/noparse]$fe]
> serout 7,2400, [noparse][[/noparse]$01]
> pause 10
>
> serout 7,2400,[noparse][[/noparse]"Hello World!"]
>
> serout 7,2400,[noparse][[/noparse]$fe]
> serout 7,2400, [noparse][[/noparse]$c0]
> pause 10
>
> serout 7,2400,[noparse][[/noparse]"Line 2!"]
>
>(I assume this program will output text to both lines of the lcd)
>
>I hope my questions arent dumb, and I apologise for the length of
>this post, but I would love to get this going, and am having no luck on my
>own.
>
>I appreciate any help you guys can offer.
>
>Thanks!
>
>Stampboi
>
>Hi -
I suspect your problem is in the specification for BAUDMODE in the serout
commands. BAUDEMODE should be selected as shown in Table 5.82 on Page
Numbered 297 in the Stamp Manual. One does NOT indicate the baud rate in the
BAUDMODE parameter as you seem to have done. The BAUEMODE parameter is derived
from the baud rate but it is not numerically identical. Please see the Stamp
Manual for further details.
Regards,
Bruce Bates
serial signal. You can't do that. You need to connect the pins of the Stamp
to the data pins of the LCD and not use the Serial output commands. The LED
pins you mentioned 15 and 16 are for the LED backlight not the LCD. You still
need to connect power to the LCD power pins 1 and 2.
now and don't connect power directly to them without checking the
documentation unless you want to turn your display into a non-backlit model.
Pins 1 & 2 power the electronics and pin 3 adjusts the contrast.
Download the Basic Stamp 1 Application Notes from the Parallax site and
check out the first set of notes. While this is for a BS1, the schematic is
the same as far as which LCD pins are connected to power, etc...
Original Message
> I just purchased an EDE702 lcd interface IC, and a 16x2 led that says
> "ORION" on the back with "HD44780A00" on the lcd's chip. I have
> connected the ede702 to the lcd as per the instructions (although I
> am using a BSII). When I run a program to output text to the lcd, it
> does nothing. The lcd lights up when power is applied so I assume it
> is working properly. I am wondering if the hookup diagram that came
> with the ede702 applies to my particular lcd. The pin functions for
> my lcd are as follows:
>
> Pin # Function
>
> 1 GND
> 2 +5
> 3 Liquid crystal driving voltage
> 4 RS
> 5 R/W
> 6 Enable
> 7 thru 14 Data Bus Line 0 thru 7
> 15 Anode
> 16 Cathode
>
> The led's insructions states that the led is powered thru pins 15 &
> 16, so what good are pins 1 & 2?
>
> Here is the little BSII prg I am using to test it with:
>
> pause 500
>
> serout 7,2400,[noparse][[/noparse]$fe]
> serout 7,2400, [noparse][[/noparse]$01]
> pause 10
>
> serout 7,2400,[noparse][[/noparse]"Hello World!"]
>
> serout 7,2400,[noparse][[/noparse]$fe]
> serout 7,2400, [noparse][[/noparse]$c0]
> pause 10
>
> serout 7,2400,[noparse][[/noparse]"Line 2!"]
>
> (I assume this program will output text to both lines of the lcd)
http://www.j-com.net/lcd4x20.pdf
It also works with a 4line x 20 LCD. Be sure the polarity is set correctly
and the contrast resistor(s) are in place or you won't see anything.
James R. Parish
J-Tech Internet Services Division
J-Com Enterprises, Inc.
Original Message
From: Bruce Bates [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=fV-Gi7ZFMcXn1qAwazqSswSfCrNA8Xz3RvzgYlBq7nP3BnfPABZsSx3Hq47_vWtz72OrNVDtpvNpiMAaMg]bvbates@u...[/url
Sent: Wednesday, September 19, 2001 11:53 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] LCD and EDE702
At 9/19/2001 Wednesday 11:27 PM, stampboi@y... promulgated:
>Hello All!
>
>I just purchased an EDE702 lcd interface IC, and a 16x2 led that says
>"ORION" on the back with "HD44780A00" on the lcd's chip. I have
>connected the ede702 to the lcd as per the instructions (although I
>am using a BSII). When I run a program to output text to the lcd, it
>does nothing. The lcd lights up when power is applied so I assume it
>is working properly. I am wondering if the hookup diagram that came
>with the ede702 applies to my particular lcd. The pin functions for
>my lcd are as follows:
>
>Pin # Function
>
>1 GND
>2 +5
>3 Liquid crystal driving voltage
>4 RS
>5 R/W
>6 Enable
>7 thru 14 Data Bus Line 0 thru 7
>15 Anode
>16 Cathode
>
>The led's insructions states that the led is powered thru pins 15 &
>16, so what good are pins 1 & 2?
>
>Here is the little BSII prg I am using to test it with:
>
> pause 500
>
> serout 7,2400,[noparse][[/noparse]$fe]
> serout 7,2400, [noparse][[/noparse]$01]
> pause 10
>
> serout 7,2400,[noparse][[/noparse]"Hello World!"]
>
> serout 7,2400,[noparse][[/noparse]$fe]
> serout 7,2400, [noparse][[/noparse]$c0]
> pause 10
>
> serout 7,2400,[noparse][[/noparse]"Line 2!"]
>
>(I assume this program will output text to both lines of the lcd)
>
>I hope my questions arent dumb, and I apologise for the length of
>this post, but I would love to get this going, and am having no luck on
my
>own.
>
>I appreciate any help you guys can offer.
>
>Thanks!
>
>Stampboi
>
>Hi -
I suspect your problem is in the specification for BAUDMODE in the
serout
commands. BAUDEMODE should be selected as shown in Table 5.82 on Page
Numbered 297 in the Stamp Manual. One does NOT indicate the baud rate in
the
BAUDMODE parameter as you seem to have done. The BAUEMODE parameter is
derived
from the baud rate but it is not numerically identical. Please see the
Stamp
Manual for further details.
Regards,
Bruce Bates
To UNSUBSCRIBE, just send mail to:
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James R. Parish
J-Tech Internet Services Division
J-Com Enterprises, Inc.
Original Message
From: azeasi@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=06OOayIheBcD8d23TKoJuLQcgO5wPrVpmmv0VoTv4992EjNCTrd1YNUSEgG9Enq3Hfv6Ql0]azeasi@a...[/url
Sent: Thursday, September 20, 2001 12:48 AM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] LCD and EDE702
Your problem is that you are trying to run a standard parallel LCD with
a
serial signal. You can't do that. You need to connect the pins of the
Stamp
to the data pins of the LCD and not use the Serial output commands. The
LED
pins you mentioned 15 and 16 are for the LED backlight not the LCD. You
still
need to connect power to the LCD power pins 1 and 2.
To UNSUBSCRIBE, just send mail to:
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--- In basicstamps@y..., stampboi@y... wrote:
> Hello All!
>
> I just purchased an EDE702 lcd interface IC, and a 16x2 led that
says
> "ORION" on the back with "HD44780A00" on the lcd's chip. I have
> connected the ede702 to the lcd as per the instructions (although I
> am using a BSII). When I run a program to output text to the lcd,
it
> does nothing. The lcd lights up when power is applied so I assume
it
> is working properly. I am wondering if the hookup diagram that
came
> with the ede702 applies to my particular lcd. The pin functions
for
> my lcd are as follows:
>
> Pin # Function
>
> 1 GND
> 2 +5
> 3 Liquid crystal driving voltage
> 4 RS
> 5 R/W
> 6 Enable
> 7 thru 14 Data Bus Line 0 thru 7
> 15 Anode
> 16 Cathode
>
> The led's insructions states that the led is powered thru pins 15 &
> 16, so what good are pins 1 & 2?
>
> Here is the little BSII prg I am using to test it with:
>
> pause 500
>
> serout 7,2400,[noparse][[/noparse]$fe]
> serout 7,2400, [noparse][[/noparse]$01]
> pause 10
>
> serout 7,2400,[noparse][[/noparse]"Hello World!"]
>
> serout 7,2400,[noparse][[/noparse]$fe]
> serout 7,2400, [noparse][[/noparse]$c0]
> pause 10
>
> serout 7,2400,[noparse][[/noparse]"Line 2!"]
>
> (I assume this program will output text to both lines of the lcd)
>
> I hope my questions arent dumb, and I apologise for the length of
> this
> post, but I would love to get this going, and am having no luck on
my
> own.
>
> I appreciate any help you guys can offer.
>
> Thanks!
>
> Stampboi
>Where can I find this?
A datasheet and pricing details are available on our website at
www.elabinc.com in the IC's section. Several BASIC Stamp compatible IC's
are available.
Note: we are currently considering taking on more qualified distributors to
carry our Stamp related IC's. Please contact me off-list for consideration.
Todd Peterson
E-Lab Digital Engineering, Inc.
(816) 257-9954 FAX: (816) 257-9945
www.elabinc.com
My LCD works great!!!
Thanks go out to all you guys...its great to have a forum like this
with so many talented people!!!
Thanks again!
Stampboi
--- In basicstamps@y..., stampboi@y... wrote:
> Hello All!
>
> I just purchased an EDE702 lcd interface IC, and a 16x2 led that
says
> "ORION" on the back with "HD44780A00" on the lcd's chip. I have
> connected the ede702 to the lcd as per the instructions (although I
> am using a BSII). When I run a program to output text to the lcd,
it
> does nothing. The lcd lights up when power is applied so I assume
it
> is working properly. I am wondering if the hookup diagram that came
> with the ede702 applies to my particular lcd. The pin functions for
> my lcd are as follows:
>
> Pin # Function
>
> 1 GND
> 2 +5
> 3 Liquid crystal driving voltage
> 4 RS
> 5 R/W
> 6 Enable
> 7 thru 14 Data Bus Line 0 thru 7
> 15 Anode
> 16 Cathode
>
> The led's insructions states that the led is powered thru pins 15 &
> 16, so what good are pins 1 & 2?
>
> Here is the little BSII prg I am using to test it with:
>
> pause 500
>
> serout 7,2400,[noparse][[/noparse]$fe]
> serout 7,2400, [noparse][[/noparse]$01]
> pause 10
>
> serout 7,2400,[noparse][[/noparse]"Hello World!"]
>
> serout 7,2400,[noparse][[/noparse]$fe]
> serout 7,2400, [noparse][[/noparse]$c0]
> pause 10
>
> serout 7,2400,[noparse][[/noparse]"Line 2!"]
>
> (I assume this program will output text to both lines of the lcd)
>
> I hope my questions arent dumb, and I apologise for the length of
> this
> post, but I would love to get this going, and am having no luck on
my
> own.
>
> I appreciate any help you guys can offer.
>
> Thanks!
>
> Stampboi
doing is have some sort of generic startup event they do on the first line
of the LCD to let you know their interface is working.
On any Stamp or OOPic project I build, I put an LED on one pin to use as a
signal device to let me know the program is running, etc... Debug statements
are nice, but if you don't have a PC connected you are out of luck.
Original Message
> As it turned out, my problem was indeed with the baudmode setting...
> My LCD works great!!!
>
> Thanks go out to all you guys...its great to have a forum like this
> with so many talented people!!!
am having problems getting.
thank
Mark
adamsfamily40@h...
--- In basicstamps@y..., "James R. Parish" <wiz@a...> wrote:
> Here is a working schematic using this chip.
> http://www.j-com.net/lcd4x20.pdf
>
> It also works with a 4line x 20 LCD. Be sure the polarity is set
correctly
> and the contrast resistor(s) are in place or you won't see
anything.
>
> James R. Parish
> J-Tech Internet Services Division
> J-Com Enterprises, Inc.
>
>
Original Message
> From: Bruce Bates [noparse][[/noparse]mailto:bvbates@u...]
> Sent: Wednesday, September 19, 2001 11:53 PM
> To: basicstamps@y...
> Subject: Re: [noparse][[/noparse]basicstamps] LCD and EDE702
>
> At 9/19/2001 Wednesday 11:27 PM, stampboi@y... promulgated:
> >Hello All!
> >
> >I just purchased an EDE702 lcd interface IC, and a 16x2 led that
says
> >"ORION" on the back with "HD44780A00" on the lcd's chip. I have
> >connected the ede702 to the lcd as per the instructions (although I
> >am using a BSII). When I run a program to output text to the lcd,
it
> >does nothing. The lcd lights up when power is applied so I assume
it
> >is working properly. I am wondering if the hookup diagram that
came
> >with the ede702 applies to my particular lcd. The pin functions
for
> >my lcd are as follows:
> >
> >Pin # Function
> >
> >1 GND
> >2 +5
> >3 Liquid crystal driving voltage
> >4 RS
> >5 R/W
> >6 Enable
> >7 thru 14 Data Bus Line 0 thru 7
> >15 Anode
> >16 Cathode
> >
> >The led's insructions states that the led is powered thru pins 15 &
> >16, so what good are pins 1 & 2?
> >
> >Here is the little BSII prg I am using to test it with:
> >
> > pause 500
> >
> > serout 7,2400,[noparse][[/noparse]$fe]
> > serout 7,2400, [noparse][[/noparse]$01]
> > pause 10
> >
> > serout 7,2400,[noparse][[/noparse]"Hello World!"]
> >
> > serout 7,2400,[noparse][[/noparse]$fe]
> > serout 7,2400, [noparse][[/noparse]$c0]
> > pause 10
> >
> > serout 7,2400,[noparse][[/noparse]"Line 2!"]
> >
> >(I assume this program will output text to both lines of the lcd)
> >
> >I hope my questions arent dumb, and I apologise for the length of
> >this post, but I would love to get this going, and am having no
luck on
> my
> >own.
> >
> >I appreciate any help you guys can offer.
> >
> >Thanks!
> >
> >Stampboi
> >
> >Hi -
>
> I suspect your problem is in the specification for BAUDMODE in the
> serout
> commands. BAUDEMODE should be selected as shown in Table 5.82 on
Page
> Numbered 297 in the Stamp Manual. One does NOT indicate the baud
rate in
> the
> BAUDMODE parameter as you seem to have done. The BAUEMODE parameter
is
> derived
> from the baud rate but it is not numerically identical. Please see
the
> Stamp
> Manual for further details.
>
> Regards,
>
> Bruce Bates
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@y...
> from the same email address that you subscribed. Text in the
Subject
> and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/