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Topic: FW für 3,5 Zoll (Read 6165 times)
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dl2eea
schon länger dabei
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Posts: 59
Ich liebe meine Frau!
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FW für 3,5 Zoll
« on: 27. December 2017, 11:53:59 »
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Hallo,
Gibt es schon Software für lcd 3,5 Zoll?
Grüß
Josef
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dl2eea
schon länger dabei
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Posts: 59
Ich liebe meine Frau!
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Re:FW für 3,5 Zoll
« Reply #2 on: 27. December 2017, 15:37:09 »
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Danke Andreas, das wollte ich nur wissen.
73
Josef
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DF5LI
alter Hase
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Posts: 371
Ich liebe meinen SParrow !
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Re:FW für 3,5 Zoll
« Reply #3 on: 27. December 2017, 18:33:13 »
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Schön! Das bedeutet, dass meine beiden Prototypen I40_ui_V1.6 und V1.7 mit 3,2" Displays bald keine Firmware-Updates mehr bekommen, weil die Displays nicht mehr unterstützt werden?
Mir bleibt also dann nichts anderes mehr übrig, als sie
a) nicht mehr mit neuer Firmware zu versorgen, oder
b) bei Andreas dafür 3,5" Displays zu kaufen oder
c) mich in die Erstellung eigener Firmwarepakete einzuarbeiten ?
Sind die mcHFs V04 - V06 mit 2,8" oder 3,2" Displays auch davon betroffen?
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73, Harri
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dstirrup
Neuling
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Re:FW für 3,5 Zoll
« Reply #5 on: 10. March 2018, 06:59:41 »
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Hi Andreas,
Thank you for your enthusiastic and hard work.
Like you I also have built many micro controller projects and some commercial products.
Working with what is available and easily + cheaply available is the compromise rule.
I am wondering why we do not use the Raspberry Pi SPI interface to communicate with the display?
Is there a technical or thinking reason to use the parallel native screen connections?
The other question relating to how we talk to the display is can we not compile in the Raspberry library? or would that create a problem?
73's
David
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DB4PLE
positron
Urgestein
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Re:FW für 3,5 Zoll
« Reply #6 on: 10. March 2018, 08:52:10 »
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Hello David,
a number of reasons:
1) formfactor: Using a custom PCB keeps the height of the whole display assmbly as low as possible. The RPI display adds a lot of height.
2) speed: The parallel display is much faster than SPI (about factor 8 ).
3) bidirectional communication: using the parallel display permits us to "talk" to the display controller. The way the SPI is realized on the RPI display it is write only, so a display controller presence detection does not work with these displays.
Having said this, we do support the RPI ILI9486 3.5 display in latest firmware: If enabled (which it is by default) we assume the RPI ILI9486 SPI display at 480x320 to be connected, if none of the other supported display types were found.
You'll need to build an simple adapter connecting the RPI SPI & power lines with the 34 pin connector in OVI40 or buy one from DF8OE.
73
Danilo
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| « Last Edit: 10. March 2018, 10:10:14 by DF8OE » |
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dstirrup
Neuling
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Re:FW für 3,5 Zoll
« Reply #7 on: 10. March 2018, 10:03:12 »
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Hello Danilo 
I understand all the points in your reply thank you.
Out of interest is a Touch X Y 4 wire interface implemented in the firmware ?
73
David
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DB4PLE
positron
Urgestein
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Re:FW für 3,5 Zoll
« Reply #8 on: 10. March 2018, 10:12:34 »
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Hi,
we support the XPT2046 touch controller (which connects to the 4 wire touchscreen glued on top of the LCD itself).
All supported display modules have this controller (or one of the compatible controllers).
And yes, the firmware makes use of the touchscreen, if detected.
73
Danilo
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| « Last Edit: 10. March 2018, 10:13:10 by DB4PLE » |
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dstirrup
Neuling
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Re:FW für 3,5 Zoll
« Reply #9 on: 11. March 2018, 22:56:17 »
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Hi Danilo,
I have been searching but yet to find exactly what is the display panel specification is?
So I am asking what parallel controller family is supported in the firmware? ILI / SSD etc?
The current connector and schematic have the SPI interface documented but I gather this has been discontinued so I am only concerned about the parallel connections.
David
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| « Last Edit: 12. March 2018, 11:21:47 by dstirrup » |
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