Author
|
Topic: LCD 3.5" DF8OE/SP9BSL (Read 16344 times)
|
|
OE3HKC
alter Hase
 Offline
Posts: 348
Ich liebe dieses Forum und meinen MiniTRX !!
|
 |
Re:LCD 3.5" DF8OE/SP9BSL
« Reply #45 on: 16. January 2018, 20:47:21 »
|
|
und an Andreas...
danke auch für die Tabelle mit der Anschlussbelegung der 40-poligen Buchsenleiste...
jetzt ist mir vieles klarer, zumal der Kommentar in chinesischen Schriftzeichen darüber restlos Aufschluss gibt...
ich habe nebenberuflich vor ein paar Jahren eine 2-jährige Ausbildung in chinesischer Heilmassage (Tuina) an einem Wiener Massageinstitut absolviert... war eine gute Sache...
diesbezüglich haben die Chinesen eine Menge am Kasten... die alten jedenfalls 
in diesem Sinne vy 73,
Helmut
|
| « Last Edit: 16. January 2018, 21:01:35 by OE3HKC » |
 Logged
|
wer immer strebend sich bemüht, dem wird es auch gelingen !!
|
|
|
DL8EBD
positron
Urgestein
Offline
Posts: 1924
|
|
Re:LCD 3.5" DF8OE/SP9BSL
« Reply #46 on: 17. January 2018, 05:30:36 »
|
|
Andreas hat da mit den Bezeichnungen der Netznamen schon Recht.
Das gibt sonst ein riesen Durcheinander oder zumindest Verwirrung.
Nur, das LCD Datenblatt war ja bisher unter Verschluss 
Die Diskussion wäre ja auch in der Form gar nicht erst aufgeflammt weil es ja geplant war die TFTs als fertigen plug and play Zusammenbau zu beziehen.
Man sieht ja an den Einträgen das so mancher (mich inbegriffen) "Startschwierigkeiten" hatte
|
|
Logged
|
bitte keine technische Fragen oder Diskussionen via PN, dafür ist das Forum da.
vy73
Thomas
|
|
|
|
|
Michael_K
Urgestein
Offline
Posts: 638
Ich liebe dieses Forum!
|
|
Re:LCD 3.5" DF8OE/SP9BSL/Position LCD
« Reply #48 on: 18. January 2018, 05:05:02 »
|
|
Hier mal eine Frage "mechanischer" Natur:
da ja das LCD dank der Flexbandleitung ein paar mm hin und her geschoben werden kann, wo positionieren wir das Teil auf der Träger-/Adapter-Platine?
Das hat aktuell eine geringe Bedeutung, aber später für die Frontplattengestaltung (Durchbruch zum Display) für die "allgemeine Nachnutzung" der Zeichnungen doch.
Vielleicht kann Andreas diese Frage an Hand der "fertig konfektionierten" Displays beantworten.
vy 73 aus Erfurt
Michael_K
|
|
Logged
|
|
|
|
|
|
|
|
Paul C. H.
Neuling
Offline
Posts: 23
Ich liebe dieses Forum!
|
|
Re:LCD 3.5" DF8OE/SP9BSL
« Reply #51 on: 21. January 2018, 19:49:18 »
|
|
Is XPT2046 equivalent for ADS7843E? I soldered it already.
but I don't know if XPT works or not, because I made another mistake.
I ordered bare boards of OVI40 and buy my own components (coz I have some stored value in a local online component shop). I ordered the wrong FPC40 connector so that I need to wait for the correct one.
For those who are planning to order their own component: be aware some FPC40 connectors have metal contacts under the cable, some have metal contacts on top of the flat cable. I think top-contact type is correct.
|
|
Logged
|
I understand only two German words.
with help of this forum, I often change from "g-e-t-l-o-s-t" to "g-e-l-ö-s-t".
what in front of me was feeling of "f-u-n-k", now it is a piece of almost working "f-u-n-k"
|
|
|
DL8EBD
positron
Urgestein
Offline
Posts: 1924
|
|
Re:LCD 3.5" DF8OE/SP9BSL
« Reply #52 on: 21. January 2018, 19:52:55 »
|
|
yes Paul, XPT2046 works too, I have soldered two Display-Boards, one with the ADS and the other with the XPT.
Both works ufb
Top-Contact typ for the FPC connector is correct!
PS:
Welcome aboard!
|
| « Last Edit: 21. January 2018, 20:34:20 by DL8EBD » |
Logged
|
bitte keine technische Fragen oder Diskussionen via PN, dafür ist das Forum da.
vy73
Thomas
|
|
|
|
|
Paul C. H.
Neuling
Offline
Posts: 23
Ich liebe dieses Forum!
|
|
Re:LCD 3.5" DF8OE/SP9BSL
« Reply #54 on: 23. January 2018, 08:30:53 »
|
|
No luck (yet) after replacement of FPC connector (from botton-contact to top-contact)
Going to do a open-short test (drafted a diagram for test-points but cannot upload attachment)
If I use a HY32D-ILI LCD instead, do I need modification of anything? (other than loading low-resolution firmware) I maybe able to get HY32D delivered tomorrow.
Paul
|
| « Last Edit: 23. January 2018, 16:06:34 by Paul C. H. » |
Logged
|
I understand only two German words.
with help of this forum, I often change from "g-e-t-l-o-s-t" to "g-e-l-ö-s-t".
what in front of me was feeling of "f-u-n-k", now it is a piece of almost working "f-u-n-k"
|
|
|
DL8EBD
positron
Urgestein
Offline
Posts: 1924
|
|
Re:LCD 3.5" DF8OE/SP9BSL
« Reply #55 on: 23. January 2018, 08:44:47 »
|
|
Paul,
very important: R107 = 0R ?
|
|
Logged
|
bitte keine technische Fragen oder Diskussionen via PN, dafür ist das Forum da.
vy73
Thomas
|
|
|
Paul C. H.
Neuling
Offline
Posts: 23
Ich liebe dieses Forum!
|
|
Re:LCD 3.5" DF8OE/SP9BSL
« Reply #56 on: 23. January 2018, 09:44:39 »
|
|
Thanks
Yes, grounded LCD_cfg with R107=0R, omitted the pullup R106 as well.
Short pin 3,4 of smallest IC footprints.
Not yet cut SPI_SDO as I assume it is not a cause of white-screen.
Paul.
Paul,
very important: R107 = 0R ?
|
|
|
|
Logged
|
I understand only two German words.
with help of this forum, I often change from "g-e-t-l-o-s-t" to "g-e-l-ö-s-t".
what in front of me was feeling of "f-u-n-k", now it is a piece of almost working "f-u-n-k"
|
|
|
|
|
Paul C. H.
Neuling
Offline
Posts: 23
Ich liebe dieses Forum!
|
|
Re:LCD 3.5" DF8OE/SP9BSL
« Reply #58 on: 23. January 2018, 16:10:50 »
|
|
Thanks Andreas.
When I post my question, I thought of adding a remark "Andreas - do not answer, I read from forum knowing you are sleeping 4 hours/day", other OM can help. This is hobby, nothing urgent.
and I have 6 hours sleep per day after busy debugging.
|
|
Logged
|
I understand only two German words.
with help of this forum, I often change from "g-e-t-l-o-s-t" to "g-e-l-ö-s-t".
what in front of me was feeling of "f-u-n-k", now it is a piece of almost working "f-u-n-k"
|
|
|
Paul C. H.
Neuling
Offline
Posts: 23
Ich liebe dieses Forum!
|
 |
STUPID MISTAKE
« Reply #59 on: 23. January 2018, 16:49:27 »
|
|
I made sketch on printout of LCD-PCB, marked test-points with connected FPC pin numbers (1 to 40) for debugging.
After an hour of open-short test, re-checking, re-re-checking, I confirm there is no short to adjacent pins at FPC (beep test). Used ohm meter to check connectivity across each signal lines to GND, all confirmed there are not short to GND (0 ohm) or disconnected (ohm meter don't move) - assume no known problem with LCD-PCB
I did the same signal lines to GND test at the UI board 34 pin LCD connector , except NC pins, all confirmed connectivity to the mCU. RX LED on UI board will flash if power on with B- (bootloader USB firmware update mode)
I assume no known problem with UI board.
THEN, I FOUND MYSELF A STUPID MISTAKE.
I soldered the 34 pin block connector only at the LCD-PCB side, assuming the holes on UI-PCB are small and tight enough, pins will connect by insert without solder. This assumption is correct when I work on other projects with 8 or 10 pins. But when check with multimeter, it is not the case, a few signal lines doesn't connect.
The reason I made this very STIPID mistakes is:
1. in case thing doesn't work, it take substantial long time to de-solder 34 pins.
2. if I add a female socket on the UI-PCB, the LCD-PCB will be at least 9mm away, will not fit in existing mcHF enclosure.
Is there better method to confirm the LCD works, without soldering both side of 34 pin block connector?
(or any male-female connector not 9mm thick?)
Paul
|
|
Logged
|
I understand only two German words.
with help of this forum, I often change from "g-e-t-l-o-s-t" to "g-e-l-ö-s-t".
what in front of me was feeling of "f-u-n-k", now it is a piece of almost working "f-u-n-k"
|
|
|
|
|
|
