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moon1003
moon1003
Associate III
May 2, 2023
Solved

Depending on the stm32f746-disco version, the LCD touch operation of the code generated by TouchGFX does not work.

  • May 2, 2023
  • 4 replies
  • 2622 views

hello,

For me stm32f746-disco has two versions.

1) The first is the green PCB.

The following label is attached.

MBI1191 B-03 / 2154300550

-> LCD screen normal operation / LCD Touc normal recognition

2) The second one is the blue PCB.

The following label is attached.

MB1191-F746-C01 / C220200062

​ -> LCD screen normal operation / LCD Touc normal operation not recognized

The purchase is Mouser, but first I bought the normally working red PCB and after 1 year I bought the BLUE PCB.

https://www.mouser.kr/ProductDetail/STMicroelectronics/STM32F746G-DISCO?qs=KuGPmAKtFKV4xEByQ7IKqA%3D%3D

I want to know why the touch recognition doesn't work normally on the newly purchased green PCB.

This topic has been closed for replies.
Best answer by Sarra.S

Hello @moon1003​ 

Can you please specify where did you find the revision B03? I can't seem to find it on ST Website

Thank you!

4 replies

Sarra.SBest answer
ST Employee
May 2, 2023

Hello @moon1003​ 

Can you please specify where did you find the revision B03? I can't seem to find it on ST Website

Thank you!

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
moon1003
moon1003Author
Associate III
May 2, 2023

Hello 

MBI1191 B-03

was determined by looking at the labels on your Discovery Kit.

The problem is that MBI1191 B-03 has good LCD touch and MB1191-F746-C01 has no LCD touch.

Maybe the touch controller has been changed?

Thank you!

Sarra.S
ST Employee
May 2, 2023

These are the list of changes made between version B02 and C01

  • QSPI Micron N25Q128A13EF840F changed in MT25QL128ABA1EW9-0SIT (reached B-05)
  • LCD Rocktech RK043FN48H-CT672B changed in KUNJIAN HT043C (reached B-05)
  • MEMS ST MP34DT01TR-M changed in ST IMP34DT05TR (reached C-01)
  • Oscillator NDK NZ2520SB 25MHz END4869B changed in NDK NZ2520SH 25MHz END4869C (reached C-01)
  • Oscillator NDK NZ2520SB 24MHz END4869B changed in NDK NZ2520SH 24MHz END4869D (reached C-01)
  • USB protection ST USBULC6-2F3 changed in ON Semiconductor ESD7383NCTBG (reached C-01)

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
moon1003
moon1003Author
Associate III
May 2, 2023

Thanks for the reply.

We are working on creating a project in TouchGFX Designer.

Is there a way to solve the LCD Touch problem caused by the above change in TouchGFX Designer?

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