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

[moon1003]

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.

[Sarra.S · Accepted solution]

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!

[moon1003]

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]

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)

[moon1003]

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?