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1. Re: 2.8" TFT color module won't work with 8-bit parallel interface and SEGGER emWin files
user_14586677 Jul 16, 2014 3:04 PM (in response to rob.engberts)Post project for forum to look at -
“File” Creator
“Create Workspace Bundle”
Use Firefox or IE, not chrome to post.
Regards, Dana.
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2. Re: 2.8" TFT color module won't work with 8-bit parallel interface and SEGGER emWin files
rob.engberts Jul 17, 2014 3:21 AM (in response to rob.engberts)Hi Dana,
Attached my project. It's only for testing if I can get the TFT working...
In the meantime I did some experiments with resistive pull up/down the data lines but no result.
I hope you can help!
Regards,
Rob
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3. Re: 2.8" TFT color module won't work with 8-bit parallel interface and SEGGER emWin files
rob.engberts Jul 19, 2014 12:37 PM (in response to rob.engberts)Seems to be a hard question...
Maybe it has something to do with timing? I found that it makes no difference when I change the clock fequency on the input of the Cy module.
Has anyone experiences with the Grafhic LCD 8-bit parallel interface module with or w/o the emWin files?
Rob
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4. Re: 2.8" TFT color module won't work with 8-bit parallel interface and SEGGER emWin files
user_49271930 Jul 19, 2014 2:43 PM (in response to rob.engberts)I have only one project with Grafhic LCD 8-bit parallel interface module for WG240128_5LP.zip here for WG240128R-TFH
I did not use EmWin library from Segger:
- I read: emWin license frozen
- It seemed to me that this too cumbersome and redundant, especially for PSoC4
- I could not find drivers from segger for my displays but found a lot of ready-made private decisions.
But this is just the problem of my qualifications.
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5. Re: 2.8" TFT color module won't work with 8-bit parallel interface and SEGGER emWin files
rob.engberts Jul 21, 2014 7:05 AM (in response to rob.engberts)Hi Pavlov,
Thanks for info. When I was looking at your set-up, I realized that it was quite the same as mine. So the problem must be in the hardware. And it was....
Self-willed as I am, I found that it should be possible to control the lcd with an 8-bits interface. But I forgot that this display had an other possibility for 8-bits control, namely by using a 8-bits 74HC573 latch, activated by a adding a resistor. And that was the solution.
Before I could start testing, I had to set the Cy interface back to 16-bits, add a LE line in the design to control the latch and modified the original source to split the 16 bits data to 2 times 8-bits, write the low byte into the latch, latched it and write the high byte. Then clocked it into the LCD controller. The 8-bits data from the PsoC is connected to D10-D17 of the LCD module.
On the attached picture you can see the result. Maybe it’s an idea for Cypress to add an new 8-bit Graphic LCD module using a latch, because these kind of GLCD is also very popular.
B.t.w. I had no problem using the (old..) emWin files in my PSoC5 envirement.
Rob
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6. Re: 2.8" TFT color module won't work with 8-bit parallel interface and SEGGER emWin files
rob.engberts Jul 21, 2014 7:07 AM (in response to rob.engberts)forgotten to add the picture...
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PSoC_TFT.JPG 271.5 K
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7. Re: 2.8" TFT color module won't work with 8-bit parallel interface and SEGGER emWin files
user_342122993 Jul 23, 2014 2:04 PM (in response to rob.engberts)Could you please post updated example project. What is your screen resolution and max update rate?
odissey1
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8. Re: 2.8" TFT color module won't work with 8-bit parallel interface and SEGGER emWin files
majed.rostamian Jul 25, 2014 2:31 PM (in response to rob.engberts)Roberto,
Can you please post the updated project file?
Thanks
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9. Re: 2.8" TFT color module won't work with 8-bit parallel interface and SEGGER emWin files
rob.engberts Jul 27, 2014 4:35 AM (in response to rob.engberts)Hi odissey1 and majed,
Attached my test project.
I made a new module based on the original Graphic LCD Parallel Interface where I modified the .c file to change the Write function into the one that handles the 8-bit interface with latch.
I added to the project the emWin files including the colorbar test file as well.
Rob
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10. Re: 2.8" TFT color module won't work with 8-bit parallel interface and SEGGER emWin files
alptigins_1497506 Nov 9, 2015 7:26 AM (in response to rob.engberts)Hi Roberto48,
I just downloaded your test project but GUI.h file not found. Can you upload again ?
Thanks
Alptigin