DAISY Display Kit

sebastian_s · 13th October 2006, 07:39 PM

Hi all!

I'm trying to get the display kit from DAISY-Laser working. I have made PCBs according to the schematic provided on their website (http://www.daisy-laser.com/products/...laysection.PDF), but when I switch everything on, the display remains dark.
The VFD itself seems to be ok. At least I can get some segments glowing when I connect pins manually.

Actually, everyting working instantly would have surprised me. But now that I'm sitting here in front of the dark display, any hint how to start debugging is appreciated. Maybe somebody out there has any experience with this kit...

Does anybody know how the display controller behaves when it does not get any input? Will it display anything?

Any help is very much appreciated.

Thanks in advance!

Sebastian

Alien8 · 14th October 2006, 07:34 AM

Have you programmed the controller ?

SSassen · 14th October 2006, 10:29 PM

Quote:

Have you programmed the controller ?

That would be my first question as well, without the proper code in the microcontroller you won't see anything happening I'm afraid

Best regards,

Sander Sassen
http://www.hardwareanalysis.com

Chris Jennings · 15th October 2006, 10:04 AM

Daisy provide the driver pre-programmed.

Have you tried disconnecting the 80c32 from the display driver and manually pulling the test pin on the driver?

Chris

sebastian_s · 15th October 2006, 05:21 PM

Hi Chris,

thanks for highlighting the existence of the "test" pin. I wasn't aware of it.
When I connect it to +5V, some segments of the display lighten. When I disconnect it and reconnect it again, other segments lighten.

Unfortunately, I did not find any reference to what it should display when the test pin is used. I'd assume that it should run through some kind of test cycle, displaying various thing on its own without the test pin being triggered...

Anyway, being able to make the display do something was kind of rewardng

Cheers

Sebastian

P.S.: Yes, the DAISY kit includes a pre-programmed EPROM...

Guido Tent · 16th October 2006, 09:37 AM

Quote:

Originally posted by sebastian_s
Hi Chris,

thanks for highlighting the existence of the "test" pin. I wasn't aware of it.
When I connect it to +5V, some segments of the display lighten. When I disconnect it and reconnect it again, other segments lighten.

Unfortunately, I did not find any reference to what it should display when the test pin is used. I'd assume that it should run through some kind of test cycle, displaying various thing on its own without the test pin being triggered...

Anyway, being able to make the display do something was kind of rewardng

Cheers

Sebastian

P.S.: Yes, the DAISY kit includes a pre-programmed EPROM...

Hi Sebastian,

I'd suggest to start checking all supply voiltages

good luck

Guido

13th October 2006, 07:39 PM	#1
sebastian_s diyAudio Member Join Date: Sep 2006	DAISY Display Kit Hi all! I'm trying to get the display kit from DAISY-Laser working. I have made PCBs according to the schematic provided on their website (http://www.daisy-laser.com/products/...laysection.PDF), but when I switch everything on, the display remains dark. The VFD itself seems to be ok. At least I can get some segments glowing when I connect pins manually. Actually, everyting working instantly would have surprised me. But now that I'm sitting here in front of the dark display, any hint how to start debugging is appreciated. Maybe somebody out there has any experience with this kit... Does anybody know how the display controller behaves when it does not get any input? Will it display anything? Any help is very much appreciated. Thanks in advance! Sebastian

14th October 2006, 07:34 AM	#2
Alien8 diyAudio Member Join Date: Mar 2004 Location: Leuven	Have you programmed the controller ? __________________ A8 If 'I' knew what I was doing, life would sure be easier...

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15th October 2006, 10:04 AM	#4
Chris Jennings diyAudio Member Join Date: Jan 2005 Location: Southampton	Daisy provide the driver pre-programmed. Have you tried disconnecting the 80c32 from the display driver and manually pulling the test pin on the driver? Chris

15th October 2006, 05:21 PM	#5
sebastian_s diyAudio Member Join Date: Sep 2006	Hi Chris, thanks for highlighting the existence of the "test" pin. I wasn't aware of it. When I connect it to +5V, some segments of the display lighten. When I disconnect it and reconnect it again, other segments lighten. Unfortunately, I did not find any reference to what it should display when the test pin is used. I'd assume that it should run through some kind of test cycle, displaying various thing on its own without the test pin being triggered... Anyway, being able to make the display do something was kind of rewardng Cheers Sebastian P.S.: Yes, the DAISY kit includes a pre-programmed EPROM...

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