Hi.
Does anyone know where the touch screen pins are?
The most common arrangement is A1, A2, D7, D6. i.e. LCD_WR, LCD_RS, LCD_D7, LCD_D6 as marked in your photo.
The safest way to identify them is to run the diagnose_TouchPins.ino from the examples.
You can run the TouchScreen_Calibr_native.ino sketch. But you probably will need to adjust the Touch sensitivity in the ISPRESSED() function. e.g. tp.z > 200
If you have difficulty in reading the how_to instructions or finding examples, please advise me how to improve them. I rely on feedback from users.
David.
No. You posted a photo of a Red 2.4" Mcufriend Uno shield in #0. (with parallel data bus)
Install/Upgrade the MCUFRIEND_kbv library via the Library Manager.
Does your photo accurately represent the item on your desk?
Your "schematic" in #2 is for an Adafruit product. (which happens to use SPI for TFT, SD_card, and Touch Controller)
The Adafruit design has plenty of spare pins for your "external electronics", sensors etc
The Mcufriend design has got TFT, SD_card, dumb TouchScreen. The only spare pin left on a Uno is A5 which you can use for Analog or Digital.
If you don't use the microSD Card, you can use those pins for other purposes.
David.
Yes. I still do not understand the pinout. Something should select the role of the LCD_Dx pins if they are multiplexed with the Touch interface.
The library is not the issue as I use it in my own design - it is the STM32 based board. Just do not know the functions of the pins and I am stugling to find it on the internet.
PS The picture represents the item on my desk.
PS2 I have run your example on the arduino and it displays properly.
My library works on STM32 NUCLEO boards. The Shield plugs into the Nucleo headers.
You need a SPECIAL if you have different wiring. Run the LCD_ID_readreg sketch with your wiring.
Post the defines and which STM32.
I will write a SPECIAL for you.
Make sure that you have at least two Analog pins for the X, Y.
I am happy to explain how a Touchscreen works. But you need to get the TFT running on the STM32 first.
David.
Thank you very much. I design the PCB for my device and just need to know the pinout. Without it I cant go any futher :).
franekz:
Hi.Does anyone know where the touch screen pins are?
david_prentice:
The most common arrangement is A1, A2, D7, D6. i.e. LCD_WR, LCD_RS, LCD_D7, LCD_D6 as marked in your photo.The safest way to identify them is to run the diagnose_TouchPins.ino from the examples.
You can run the TouchScreen_Calibr_native.ino sketch. But you probably will need to adjust the Touch sensitivity in the ISPRESSED() function. e.g. tp.z > 200
If you have difficulty in reading the how_to instructions or finding examples, please advise me how to improve them. I rely on feedback from users.
David.
how can I paint on 2.4" tft with ili9320 style controller
i have a 2.4" tft lcd shield with ili9320 controller. I used mcufriend_kbv library for graphic test but there is no example for paint or to draw on tft.How i can i paint on it
Install /Upgrade library with the Library Manager. Run all the examples.
Diagnose your Touchpins and Calibrate the Touch panel.
David.
Hi David.
Where can I find your Library?
Kurt
Sketches-> include_library->manage_libraries gets you to the IDE Library Manager