Program for 5 by 7 Dot Matrix
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Great forum.
I have picked up some great advice on several projects.
I need some help on displaying numeric characters on a
HDSP-2302 four character 5x7 Alphanumeric Display using a BS2.
It has a 28 shift in register and columns to clock.
Any help would be appreciated.
Thanks, Kirk
I have picked up some great advice on several projects.
I need some help on displaying numeric characters on a
HDSP-2302 four character 5x7 Alphanumeric Display using a BS2.
It has a 28 shift in register and columns to clock.
Any help would be appreciated.
Thanks, Kirk
Comments
>Great forum.
>I have picked up some great advice on several projects.
>
>I need some help on displaying numeric characters on a
>HDSP-2302 four character 5x7 Alphanumeric Display using a BS2.
>It has a 28 shift in register and columns to clock.
>
>Any help would be appreciated.
>
>Thanks, Kirk
Hi Kirk -
As hesitant as I am to say this, the Stamp may not represent the best
processor to the job. This is primarily based on reading Applications Note
1016. That App Note is referenced in the data sheet - both of which are
important.
The App Note shows 4 typical applications, but all of the processors are
able to develop an external address. The processors shown are the Intel
8080 and the Motorola 6800. Both bring out data and address lines. The
Stamp has no address lines, although that isn't the main problem. "Phoney"
address could certainly be developed by the use of external chips. The
drive current required is also more that is appropriate for the Stamp, and
the timing required is, at best, somewhat questionable.
All this is based on the present Stamp offerings. Somewhat unfortunately
the Stamp platform is presently in a state of flux. Some new processors are
being added to the Parallax line, but full documentation is not yet
available. With that in mind, you might want to direct this question
directly to the tech support folks at Parallax, and provide them with the
data sheet and App Notes to discuss it.
My guess is that at least 3 outboard chips may be required, unless a
suitable LED driver chip can be found. The driver chip will have to attend
to both the drive current and the refresh needs for the full display. The
data-shifting is the easy part, which is the eye-catcher which might tempt
one to say SURE, immediately.
If this were my project, I'd be tempted to find another display method,
primarily due to the external component requirement (board space for
external chips). If that's not a problem - have at it : )
Hope that helps
Regards,
Bruce Bates
Thanks for the advice.
My project is to display time on numerous (over 100) 4 digit displays and
have them all one minute apart. Since I need numerous displays the cost is
an important factor. The HDSP2302's were 89 cents apiece. Any suggestions
on using the BS2 to accomplish this would be appreciated.
At 07:04 AM Thursday 12/7/2000 -0600, you wrote:
>Great forum.
>I have picked up some great advice on several projects.
>
>I need some help on displaying numeric characters on a
>HDSP-2302 four character 5x7 Alphanumeric Display using a BS2.
>It has a 28 shift in register and columns to clock.
>
>Any help would be appreciated.
>
>Thanks, Kirk
Hi Kirk -
As hesitant as I am to say this, the Stamp may not represent the best
processor to the job. This is primarily based on reading Applications Note
1016. That App Note is referenced in the data sheet - both of which are
important.
The App Note shows 4 typical applications, but all of the processors are
able to develop an external address. The processors shown are the Intel
8080 and the Motorola 6800. Both bring out data and address lines. The
Stamp has no address lines, although that isn't the main problem. "Phoney"
address could certainly be developed by the use of external chips. The
drive current required is also more that is appropriate for the Stamp, and
the timing required is, at best, somewhat questionable.
All this is based on the present Stamp offerings. Somewhat unfortunately
the Stamp platform is presently in a state of flux. Some new processors are
being added to the Parallax line, but full documentation is not yet
available. With that in mind, you might want to direct this question
directly to the tech support folks at Parallax, and provide them with the
data sheet and App Notes to discuss it.
My guess is that at least 3 outboard chips may be required, unless a
suitable LED driver chip can be found. The driver chip will have to attend
to both the drive current and the refresh needs for the full display. The
data-shifting is the easy part, which is the eye-catcher which might tempt
one to say SURE, immediately.
If this were my project, I'd be tempted to find another display method,
primarily due to the external component requirement (board space for
external chips). If that's not a problem - have at it : )
Hope that helps
Regards,
Bruce Bates
>Bruce,
>Thanks for the advice.
>My project is to display time on numerous (over 100) 4 digit displays and
>have them all one minute apart. Since I need numerous displays the cost is
>an important factor. The HDSP2302's were 89 cents apiece. Any suggestions
>on using the BS2 to accomplish this would be appreciated.
Hi Kirk -
I glanced at Allegro, but they don't seem to have an appropriate driver chip.
It's going to take some chip searching, so I'll post what I find later.
Regards,
Bruce Bates
>Bruce,
>Thanks for the advice.
>My project is to display time on numerous (over 100) 4 digit displays and
>have them all one minute apart. Since I need numerous displays the cost is
>an important factor. The HDSP2302's were 89 cents apiece. Any suggestions
>on using the BS2 to accomplish this would be appreciated.
Kirk -
I only took a quick look at this, but see what you think: Philips SAA1064 .
I suspect it may not have the drive current required, but that MAY not matter.
I also made inquiry for you at a custom IC site to see what they might have
hiding somewhere : ) More when I know more.
regards,
Bruce
>At 07:04 AM Thursday 12/7/2000 -0600, you wrote:
> >Great forum.
> >I have picked up some great advice on several projects.
> >
> >I need some help on displaying numeric characters on a
> >HDSP-2302 four character 5x7 Alphanumeric Display using a BS2.
> >It has a 28 shift in register and columns to clock.
> >
> >Any help would be appreciated.
> >
> >Thanks, Kirk
>
>Hi Kirk -
>
>As hesitant as I am to say this, the Stamp may not represent the best
>processor to the job. This is primarily based on reading Applications Note
>1016. That App Note is referenced in the data sheet - both of which are
>important.
>
>The App Note shows 4 typical applications, but all of the processors are
>able to develop an external address. The processors shown are the Intel
>8080 and the Motorola 6800. Both bring out data and address lines. The
>Stamp has no address lines, although that isn't the main problem. "Phoney"
>address could certainly be developed by the use of external chips. The
>drive current required is also more that is appropriate for the Stamp, and
>the timing required is, at best, somewhat questionable.
>
>All this is based on the present Stamp offerings. Somewhat unfortunately
>the Stamp platform is presently in a state of flux. Some new processors are
>being added to the Parallax line, but full documentation is not yet
>available. With that in mind, you might want to direct this question
>directly to the tech support folks at Parallax, and provide them with the
>data sheet and App Notes to discuss it.
>
>My guess is that at least 3 outboard chips may be required, unless a
>suitable LED driver chip can be found. The driver chip will have to attend
>to both the drive current and the refresh needs for the full display. The
>data-shifting is the easy part, which is the eye-catcher which might tempt
>one to say SURE, immediately.
>
>If this were my project, I'd be tempted to find another display method,
>primarily due to the external component requirement (board space for
>external chips). If that's not a problem - have at it : )
>
>Hope that helps
>
>Regards,
>
>Bruce Bates
I did the BS2 to display digits using the following code.
I only displays 0541 and refresh is slow.
I am working a ways to speed it up and use variables.
What a great chip.
Thanks again, Kirk
v var byte
y var word
dirs = $ff
outs =$00
Main:
for v = 2 to 6
lookup v - 2, [noparse][[/noparse]0,66,127,64,0], y 'Digit 1
shiftout 1, 0, 1, [noparse][[/noparse]y\7]
lookup v - 2, [noparse][[/noparse]24,20,18,127,16], y 'Digit 4
shiftout 1, 0, 1, [noparse][[/noparse]y\7]
lookup v - 2, [noparse][[/noparse]39,69,69,69,57], y 'Digit 5
shiftout 1, 0, 1, [noparse][[/noparse]y\7]
lookup v - 2, [noparse][[/noparse]62,81,73,69,62], y 'Digit 0
shiftout 1, 0, 1, [noparse][[/noparse]y\7]
high v
pause 2
low v
next
Original Message
From: Bruce Bates [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=ZAm6OTSWzi-ZLP1qj5YTUQZ0QwRBQx7-QEWnDziauCyYoW4yQx6Xwm5phESnCjMRwd78xNYF0u0vmJLp]bvbates@u...[/url
Sent: Thursday, December 07, 2000 4:46 PM
To: basicstamps@egroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Program for 5 by 7 Dot Matrix
At 10:06 AM Thursday 12/7/2000 -0600, you wrote:
>Bruce,
>Thanks for the advice.
>My project is to display time on numerous (over 100) 4 digit displays and
>have them all one minute apart. Since I need numerous displays the cost is
>an important factor. The HDSP2302's were 89 cents apiece. Any suggestions
>on using the BS2 to accomplish this would be appreciated.
Kirk -
I only took a quick look at this, but see what you think: Philips SAA1064 .
I suspect it may not have the drive current required, but that MAY not
matter.
I also made inquiry for you at a custom IC site to see what they might have
hiding somewhere : ) More when I know more.
regards,
Bruce
>At 07:04 AM Thursday 12/7/2000 -0600, you wrote:
> >Great forum.
> >I have picked up some great advice on several projects.
> >
> >I need some help on displaying numeric characters on a
> >HDSP-2302 four character 5x7 Alphanumeric Display using a BS2.
> >It has a 28 shift in register and columns to clock.
> >
> >Any help would be appreciated.
> >
> >Thanks, Kirk
>
>Hi Kirk -
>
>As hesitant as I am to say this, the Stamp may not represent the best
>processor to the job. This is primarily based on reading Applications Note
>1016. That App Note is referenced in the data sheet - both of which are
>important.
>
>The App Note shows 4 typical applications, but all of the processors are
>able to develop an external address. The processors shown are the Intel
>8080 and the Motorola 6800. Both bring out data and address lines. The
>Stamp has no address lines, although that isn't the main problem. "Phoney"
>address could certainly be developed by the use of external chips. The
>drive current required is also more that is appropriate for the Stamp, and
>the timing required is, at best, somewhat questionable.
>
>All this is based on the present Stamp offerings. Somewhat unfortunately
>the Stamp platform is presently in a state of flux. Some new processors are
>being added to the Parallax line, but full documentation is not yet
>available. With that in mind, you might want to direct this question
>directly to the tech support folks at Parallax, and provide them with the
>data sheet and App Notes to discuss it.
>
>My guess is that at least 3 outboard chips may be required, unless a
>suitable LED driver chip can be found. The driver chip will have to attend
>to both the drive current and the refresh needs for the full display. The
>data-shifting is the easy part, which is the eye-catcher which might tempt
>one to say SURE, immediately.
>
>If this were my project, I'd be tempted to find another display method,
>primarily due to the external component requirement (board space for
>external chips). If that's not a problem - have at it : )
>
>Hope that helps
>
>Regards,
>
>Bruce Bates
Data in - Pin 1
Clock - Pin 0
Column Strobe Pins 2,3,4,5,6
If anyone can give help on variables, I would appreciate it.
Thanks, Kirk
Original Message
From: WASSON, KIRK D [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=1fIBGDuAwFcCPNEstY6Vbx8N3Jj8EYpsxtPJd9XN55sW0mMER85CfjcrBghwRyWWUcW8bu6noBkaHHxap6o]kwasson@e...[/url
Sent: Friday, December 08, 2000 4:21 PM
To: 'basicstamps@egroups.com'
Subject: RE: [noparse][[/noparse]basicstamps] Program for 5 by 7 Dot Matrix
Bruce, I will check that out.
I did the BS2 to display digits using the following code.
I only displays 0541 and refresh is slow.
I am working a ways to speed it up and use variables.
What a great chip.
Thanks again, Kirk
v var byte
y var word
dirs = $ff
outs =$00
Main:
for v = 2 to 6
lookup v - 2, [noparse][[/noparse]0,66,127,64,0], y 'Digit 1
shiftout 1, 0, 1, [noparse][[/noparse]y\7]
lookup v - 2, [noparse][[/noparse]24,20,18,127,16], y 'Digit 4
shiftout 1, 0, 1, [noparse][[/noparse]y\7]
lookup v - 2, [noparse][[/noparse]39,69,69,69,57], y 'Digit 5
shiftout 1, 0, 1, [noparse][[/noparse]y\7]
lookup v - 2, [noparse][[/noparse]62,81,73,69,62], y 'Digit 0
shiftout 1, 0, 1, [noparse][[/noparse]y\7]
high v
pause 2
low v
next
Original Message
From: Bruce Bates [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=D5RYLROhW5cgcGpgEIQYpHycQ9tN7_ynA0FvQY6WN4AHQpPoRPdYqLpKRXjGet8AT2_XDwPT_jjyGprdEg]bvbates@u...[/url
Sent: Thursday, December 07, 2000 4:46 PM
To: basicstamps@egroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Program for 5 by 7 Dot Matrix
At 10:06 AM Thursday 12/7/2000 -0600, you wrote:
>Bruce,
>Thanks for the advice.
>My project is to display time on numerous (over 100) 4 digit displays and
>have them all one minute apart. Since I need numerous displays the cost is
>an important factor. The HDSP2302's were 89 cents apiece. Any suggestions
>on using the BS2 to accomplish this would be appreciated.
Kirk -
I only took a quick look at this, but see what you think: Philips SAA1064 .
I suspect it may not have the drive current required, but that MAY not
matter.
I also made inquiry for you at a custom IC site to see what they might have
hiding somewhere : ) More when I know more.
regards,
Bruce
>At 07:04 AM Thursday 12/7/2000 -0600, you wrote:
> >Great forum.
> >I have picked up some great advice on several projects.
> >
> >I need some help on displaying numeric characters on a
> >HDSP-2302 four character 5x7 Alphanumeric Display using a BS2.
> >It has a 28 shift in register and columns to clock.
> >
> >Any help would be appreciated.
> >
> >Thanks, Kirk
>
>Hi Kirk -
>
>As hesitant as I am to say this, the Stamp may not represent the best
>processor to the job. This is primarily based on reading Applications Note
>1016. That App Note is referenced in the data sheet - both of which are
>important.
>
>The App Note shows 4 typical applications, but all of the processors are
>able to develop an external address. The processors shown are the Intel
>8080 and the Motorola 6800. Both bring out data and address lines. The
>Stamp has no address lines, although that isn't the main problem. "Phoney"
>address could certainly be developed by the use of external chips. The
>drive current required is also more that is appropriate for the Stamp, and
>the timing required is, at best, somewhat questionable.
>
>All this is based on the present Stamp offerings. Somewhat unfortunately
>the Stamp platform is presently in a state of flux. Some new processors are
>being added to the Parallax line, but full documentation is not yet
>available. With that in mind, you might want to direct this question
>directly to the tech support folks at Parallax, and provide them with the
>data sheet and App Notes to discuss it.
>
>My guess is that at least 3 outboard chips may be required, unless a
>suitable LED driver chip can be found. The driver chip will have to attend
>to both the drive current and the refresh needs for the full display. The
>data-shifting is the easy part, which is the eye-catcher which might tempt
>one to say SURE, immediately.
>
>If this were my project, I'd be tempted to find another display method,
>primarily due to the external component requirement (board space for
>external chips). If that's not a problem - have at it : )
>
>Hope that helps
>
>Regards,
>
>Bruce Bates
I would like to aquire as many 5x7 hdsp-2302 displays as possible. If
you do not use all of yours, could you sell some to me?
Also, the technical pdf of the hdsp-2302 is at:
www.bgmicro.com/pdf/acs1076.pdf
Steve Payne
--- In basicstamps@yahoogroups.com, "WASSON, KIRK D" <kwasson@e...>
wrote:
> Great forum.
> I have picked up some great advice on several projects.
>
> I need some help on displaying numeric characters on a
> HDSP-2302 four character 5x7 Alphanumeric Display using a BS2.
> It has a 28 shift in register and columns to clock.
>
> Any help would be appreciated.
>
> Thanks, Kirk