Help with Rayman's touchscreen! (4.3")

Microcontrolled

I have had Raymans 4.3" touchscreen for a day. I am using the PropModule.com breakout board with touch decoder. I have had several errors getting the screen itself to work, but they were all soldering errors and they were fixed. Now I get a good picture but the touchscreen won't register! I am using Rayman's sample drivers from his website. I cannot calabrate or paint with his programs. Do I need a different I2C driver for the PropModule board? Did I *gasp* FRY the decoder IC with 5V?!?!?! There is NO specs or downloads on the PropModule website, so I did not know how much voltage to apply. It works at both, but there is NOTHING with the touchscreen. I have switched wires, resoldered connections, changed wire locations, and nothing. Can someone help me with this?

Thanks,
Micro

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Rayman

It should work with 5V, but 3.3V is probably better. What pins are you using for I2C? Remember that you need to add pullups on the I2C lines if your not using the regular pins and setup...

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Microcontrolled

28 and 29, respectively. I am using a PPDB. If I connect to other pins, what kind of pull ups do I need?

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Rayman

10k resistors to Vdd should work.

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Microcontrolled

I did that. Then I realized that I had what should have been CLK soldered instead to PI! I switched them, double checked, all was in the right place. Still doesn't work. :-(

AUGGGHHHH!!!

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Rayman

Make sure you're doing the I2C "initialize" function before trying to use it... My codes all call this function first...

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Rayman

You could also look at the INT (interupt) output of the touchscreen chip with a multimeter and see if it goes low when you touch the screen, like it should...

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Microcontrolled

This breakout board doesn't have an INT output!

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mikediv

Microcontrolled are you saying the display functions just fine you can download pictures to it and or use the graphics demo and it shows up properly.. But the only problem is the touchscreen will not work????

Rayman

Sorry!· Meant to say "IRQ"

Microcontrolled said...
This breakout board doesn't have an INT output!

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Microcontrolled

@Rayman: The only spare plug it has is a "PI" which I don't know what that is. Here is the picture. This is the only info on the site.
propmodule.com/catalog/popup_image.php?pID=47

@mikediv: Yes, the Graphics demo and the paint and calabrate will show on the screen, but I am not getting any touch.

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mikediv

Micro here is how I have connected Ray display to my prop boards.

Prop Chip:: ::Break out Board J1 pin one is at the bottom with the board view from the top

J1 Pin-1 goes to ground

Prop-pin-29 goes to J1 SDA pin-2
prop-pin-28 goes to J1 SCL pin-3
**** J1 Gnd pin-4
**** J1 VDD pin-5 I connected this to the 3.3V output of the Prop chip
prop-pin-27 J1 IRQ pin-6
prop-pin-25 J1 PCLK pin-7
prop-pin-26 J1 DE pin-8
prop-pin-23 J1 R1 pin-9
prop-pin-22 J1 R0 pin-10
prop-pin-21 J1 G1 pin-11
prop-pin-20 J1 G0 pin-12
prop-pin-19 J1 B1 pin-13
prop-pin-18 J1 B0 pin-14
prop-pin-17 J1 Hsync pin-15
prop-pin-16 J1 Vsnyc pin-16
prop-pin-24 J1 DON pin-17
prop-pin-2 J1 BL pin-18
**** J1 Gnd pin-19
**** J1 VBL I tied this to the prop 3.3V output pin


Micro I put a scope on pin IRQ display board pin 6 and it does toggle like Ray said it would I am using his paint program

Ariba

I have Rayman's Breakout board, but have not connected the IRQ pin.
So I made a version of the Paint program, which does not use the IRQ pin.
See Attachement

If this not works, you should write some testcode, which prints out the values you get from the
I2C_driver methodes GetTouchX, GetTouchY and so on. When you touch the display the values must
change and you can see if the chip and connection works.

Andy

Microcontrolled

Still nothing. Even with the IRQ commented out. I'll start on a test program....

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Microcontrolled

I'm receiving "-1" on my test program for X and Y. There has to be something up, and yes, I initialized. The test program shouldn't have any problems in it. There is something wrong with the touchscreen......

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Rayman

I still think your best approach is to try measuring the IRQ signal with a voltmeter and see if it changes when you touch the screen. That will tell you if the touchscreen chip is working or not...

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mctrivia

the address pins by default on my breakout are set to 11. so either move the jumpers to 00 position or change it in software.


TouchAdd = $4B 'Address of touchscreen controller

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mctrivia

I will make some documentation on this product.

Ray is there a link where people can purchase the screen?

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mikediv

mctriva can I ask you, beside using the IRQ pin that toggles high to low when the screen is touched ,, is there some way to this display for more than a toggle switch .. what I am asking is all I have control of is high when the screen is not touched .. low when I touch the screen
hence the toggle switch analogy.. But I am wondering if there is some way to say send an ascii character to a serial device so if I had touch me icon the Rays display and it was touched it could send "Hello" to a serial device . I am not trying to complicate this I am very new to all this and would like something more to happen to when the screen is touched????
Thanks

Micro I am with Ray just see what that IRQ line is doing reading the post again I wonder if you did wound the board when you said you had switched pins?
Also I am sorry when I posted the pinouts I thought everyone had the same breakout boards it looks like mine is different I will post photo

Post Edited (mikediv) : 4/17/2010 4:30:29 PM GMT

Rayman

sure, here's a link:

http://www.rayslogic.com/Propeller/Products/PSB/PSB_Display.htm

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mctrivia

he is using this one

hope you have not wounded but the address will cause the problem you are having.

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Microcontrolled

@Rayman: I TOLD you. There IS no IRQ!!

@mctrivia: How would I fix an address error?

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Microcontrolled

It works! I changed the touch address!

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Rayman

Glad you got it! Maybe mctrivia calls IRQ something else... Maybe it's the PI pin?

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Microcontrolled

Your guess is as good as mine. Let me hook it up and try it.

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mctrivia

Pen intefupt pi

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