I reread Ray's 12:36 pm post over and over, looked at that PSB demo source and the breakout board. Finally I figured out what you wrote. (sorry I called you 'Peter'; had two posts to get out and I goofed.)
Those 'middle eight signals, on pins 9 - 16, R1, R0, G1, G0, B1, B0, HSync and VSync are the color and sync signals you referred to. So, I come back and find Ray and tdeyle show me what they have.
Had I dealt with VGA before, I'm sure it would have made loads more sense. (How does all the 60 conductors from the LCD get transformed down to under 20 signals and pwr/ground, I'm wondering?) I suppose only 2 signals/color, this limits the colors to 64 color at any one time.
Below is what I think is one way to interface the 4.3" LCD breakout board to a Prop. (I used Rayman's rough schematic to understand the purpose and organization of the Prop signals vs. the breakout board (silk screened) names at header zone J1. I trust it was correct.)
Does my list below appear to be correct? I prefer to NOT wire up this i/f with unknown errors! Thank for any help or suggestions to improve it.
Looking at the PSB_LcdDriver source listing it has PCLK on A25 and DE on A26 (opposite to what I first found...somewhere; maybe a reading error?)
Also, WHY is there a "...Need to define one pin as NOT used"? That would be difficult to 'discover' a need for doing such.
I'm about to wire up this i/f and hope to have the documentation, at least, correct to begin with.
It appears if the breakout board is plugged in upside down, the the LCD would display 6 o'clock down and the Prop Protoboard in 'normal' position. That is the breakout would have the header pins or socket on the component side. The module then could be attached with double-sided tape to the back of the b/o board nicely. Do you see any problem doing that?
The "not used pin" is needed in order to get a pixel clock that is 180 degrees out of phase with the pixels...
Needed that so as to not violate setup and hold times for the display color inputs...
Should work upside down. Looking forward to hearing about your results...
By chance, does anybody have or know where I can get the Eagle files for the 60 pin connector for these LCDs? I'm pulling my hair out looking for them and I don't know Eagle well enough to make one.
If you buy a product from me, you are free to use the code I post for it as you like as long as the copyright notice remains intact...
I just wouldn't want somebody selling another display packaged with my code without an arrangement...
Hi all, just to let you know, I finally got my LCD Touch Break out boards yesterday from mctrivia, and soldered it up today, and it works [noparse]:)[/noparse] and the LCD's work fine too.
The Eagle library I posted earlier looks like it will work. There are some slight modifications I will need to make (make mounting pads larger), but the critical dimensions check out. I will update it tomorrow, too late to be soldering tonight
I got my proto board soldered up, and I realized I forgot to order some FTDI chips, so I can't do much until they get here. That 60-pin connector is a pain, but a whole bunch of desoldering braid later it looks okay
OMG that is terrible. They are great little displays, I can hardly wait until I have time to fire mine up!
mctrivia did a great job on the breakout board too, I already have it mounted on a Proteus, that is plugged into a Propteus... I just need time to hook up the wires between my EXP1/EXP2 connectors and the pins on the breakout board.
I've figured out how to do 256 colors on them by removing the 3R3G2B and Hsync/Vsync resistors from one of my Morpheus boards, and using SDA from CPU2 as the dot clock - and since I have a lot of memory to play with, 480x272 by 256 colors per pixel, with multiple pages, are coming to Morpheus [noparse]:)[/noparse] [noparse]:)[/noparse] [noparse]:)[/noparse]
Rayman said...
Just sold a box of 100 displays! I think that only leaves ~200 or less left...
(There were about 10,000 of these, but they were almost all destroyed. Isn't that sad?)
Judging by the size of the lower portion, I'd say he is planning on cutting it down. The bottom pictures show the demo board size bottom... but the tops appear to be from the Radio Shack cases, with a window cut in them.
Also, Chuck said he can do custom work if you want it. I am going to have him do some for me.
Rayman said...
Harley: Have fun! There is a chip in there somewhere, maybe I'll dissect the one bad display I have one day...
Ants: I think Luis may have pointed out the problem. If you are using a cable where certain wires are hard grounded (may some color pins?), that could explain why the display goes haywire only with certian colors...
Hey...that is a thought. The wire would ohm out from point to point, but could still be connected to ground as well.
James L
Unfortunatley thats not the problem / fix, i didn't use a header connector, but rather soldered·wires in made from an old 40 pin IDE cable; so the mystery remiains unsolved.
Just got back from my travels, as soon as jet lag induced brain fog clears I'll get back to looking at it.
I hooked up a 4.3" LCD with mctrivia's breakout board. The display works great but I can't figure out how to get the touchscreen to work. Question: is PI on the breakout board the Touch IRQ pin?
yes PI is the touch interupt request. by default my breakout I2C is set to 11 instead of 00 like in rays exable code. IIRC you need to change the 8 to a B in the address to compensate.
You mean here in PSB_i2cDriver?
TouchAdd = $4b 'Address of touchscreen controller
It didn't make any difference. I assume when PSB Paint starts up I should be able to just drag my fingernail across the big black rectangle and it'll draw colored lines? Nothing's happening.
Checklist:
1) SCL and SDA soldered
2) Pull ups on SCL and SDA on your board
3) jumpers on breakout are soldered(2 little ressister by touch decoder labeled 010. both should be in the 1 positon.
4) see 4 traces from touch decoder ic 2 ribon. make sure they have not been broken and are soldered to header.
5) make sure there are no solder bridges on 4 traces/
3 to 5 should not be a problem since they worked when I tested but worth checking as these are where most fail when I test.
Comments
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UC Berkeley '12 EECS
CalSol: Berkeley Solar Car team
www.calsol.berkeley.edu
KJ6AWU
I reread Ray's 12:36 pm post over and over, looked at that PSB demo source and the breakout board. Finally I figured out what you wrote. (sorry I called you 'Peter'; had two posts to get out and I goofed.)
Those 'middle eight signals, on pins 9 - 16, R1, R0, G1, G0, B1, B0, HSync and VSync are the color and sync signals you referred to. So, I come back and find Ray and tdeyle show me what they have.
Had I dealt with VGA before, I'm sure it would have made loads more sense. (How does all the 60 conductors from the LCD get transformed down to under 20 signals and pwr/ground, I'm wondering?) I suppose only 2 signals/color, this limits the colors to 64 color at any one time.
Thanks for clearing up my fog.
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Harley Shanko
Below is what I think is one way to interface the 4.3" LCD breakout board to a Prop. (I used Rayman's rough schematic to understand the purpose and organization of the Prop signals vs. the breakout board (silk screened) names at header zone J1. I trust it was correct.)
Does my list below appear to be correct? I prefer to NOT wire up this i/f with unknown errors! Thank for any help or suggestions to improve it.
Propeller / 4.3 breakout board i/f for 4.3" Samsung color LCD module - 7 Jan.2010 GND 1 GND A29 2 SDA (I2C) A28 3 SCL " GND 4 GND 3.3V 5 Vdd A27 6 IRQ A26 7 PCLK A25 8 DE A23 9 R1 msb A22 10 R0 | A21 11 G1 | A20 12 G0 (byte) A19 13 B1 | A18 14 B0 | A17 15 HSync | A16 16 VSync lsb A24 17 DON (DON/BL = 1 for ON) A24 18 BL GND 19 GND (for backlight) +5V 20 VBL Prop H1 pin J1 Breakout board▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Harley Shanko
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My Prop Info&Apps: ·http://www.rayslogic.com/propeller/propeller.htm
Looking at the PSB_LcdDriver source listing it has PCLK on A25 and DE on A26 (opposite to what I first found...somewhere; maybe a reading error?)
Also, WHY is there a "...Need to define one pin as NOT used"? That would be difficult to 'discover' a need for doing such.
I'm about to wire up this i/f and hope to have the documentation, at least, correct to begin with.
It appears if the breakout board is plugged in upside down, the the LCD would display 6 o'clock down and the Prop Protoboard in 'normal' position. That is the breakout would have the header pins or socket on the component side. The module then could be attached with double-sided tape to the back of the b/o board nicely. Do you see any problem doing that?
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Harley Shanko
The "not used pin" is needed in order to get a pixel clock that is 180 degrees out of phase with the pixels...
Needed that so as to not violate setup and hold times for the display color inputs...
Should work upside down. Looking forward to hearing about your results...
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My Prop Info&Apps: ·http://www.rayslogic.com/propeller/propeller.htm
Bill
I just wouldn't want somebody selling another display packaged with my code without an arrangement...
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My Prop Info&Apps: ·http://www.rayslogic.com/propeller/propeller.htm
Cheers guys. [noparse]:)[/noparse]
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http://www.propgfx.co.uk/forum/·home of the PropGFX Lite
·
Sounds fair enough - thanks!
The Eagle library I posted earlier looks like it will work. There are some slight modifications I will need to make (make mounting pads larger), but the critical dimensions check out. I will update it tomorrow, too late to be soldering tonight
http://www.esky-sh.com/ebay_gallary/3.5/show2.jpg
Chuck at Mountain King Technologies replied with pictures of handsome bezels/cases - he just has to price them.
Forrest
(There were about 10,000 of these, but they were almost all destroyed. Isn't that sad?)
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My Prop Info&Apps: ·http://www.rayslogic.com/propeller/propeller.htm
mctrivia did a great job on the breakout board too, I already have it mounted on a Proteus, that is plugged into a Propteus... I just need time to hook up the wires between my EXP1/EXP2 connectors and the pins on the breakout board.
I've figured out how to do 256 colors on them by removing the 3R3G2B and Hsync/Vsync resistors from one of my Morpheus boards, and using SDA from CPU2 as the dot clock - and since I have a lot of memory to play with, 480x272 by 256 colors per pixel, with multiple pages, are coming to Morpheus [noparse]:)[/noparse] [noparse]:)[/noparse] [noparse]:)[/noparse]
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www.mikronauts.com E-mail: mikronauts _at_ gmail _dot_ com 5.0" VGA LCD in stock!
Morpheus dual Prop SBC w/ 512KB kit $119.95, Mem+2MB memory/IO kit $89.95, both kits $189.95 SerPlug $9.95
Propteus and Proteus for Propeller prototyping 6.250MHz custom Crystals run Propellers at 100MHz
Las - Large model assembler Largos - upcoming nano operating system
Post Edited (Bill Henning) : 1/27/2010 6:06:53 PM GMT
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24 bit LCD Breakout Board now in. $24.99 has backlight driver and touch sensitive decoder.
If you have not already. Add yourself to the prophead map
Forrest, we won't believe you until you post them.
Bill
OK - see two attached pictures
Forrest
I want the bezel to be say 1/2" max around the display.
Mike
Also, Chuck said he can do custom work if you want it. I am going to have him do some for me.
Bill
Just got back from my travels, as soon as jet lag induced brain fog clears I'll get back to looking at it.
Thanks for the suggestion though...
Anthony
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24 bit LCD Breakout Board now in. $24.99 has backlight driver and touch sensitive decoder.
If you have not already. Add yourself to the prophead map
TouchAdd = $4b 'Address of touchscreen controller
It didn't make any difference. I assume when PSB Paint starts up I should be able to just drag my fingernail across the big black rectangle and it'll draw colored lines? Nothing's happening.
Any other hints?
1) SCL and SDA soldered
2) Pull ups on SCL and SDA on your board
3) jumpers on breakout are soldered(2 little ressister by touch decoder labeled 010. both should be in the 1 positon.
4) see 4 traces from touch decoder ic 2 ribon. make sure they have not been broken and are soldered to header.
5) make sure there are no solder bridges on 4 traces/
3 to 5 should not be a problem since they worked when I tested but worth checking as these are where most fail when I test.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
24 bit LCD Breakout Board now in. $24.99 has backlight driver and touch sensitive decoder.
If you have not already. Add yourself to the prophead map