Rpi 7'' Touchscreen Display install issue

[AkosT3]

Hello Kevin,
After installing the RpiGpioSetup and the VeCanSetup, I tried to connect my 7'' Touchscreen Display to the Rpi4B.
For some reason, the RpiDisplaySetup installed ok, but after reboot of the system, when the calibration utility launches, my
display doesn't react to touch. I'm stuck in calibration utility, and I have to reboot in command line to skip calibration.
Everything is connected as suggested.
The connecting ribbon + the 4 cables on GPIO pins:
pin 3 - SDA
pin 4 - on 5v
pin 5 - SCL
pin 6 - Ground.
I was wondering, whether due to RpiGpioSetup, the pin 3 and 5 functionality, the SDA and SCL, have not been moved to another pin.
According to the latest RpiGpioSetup pinout pdf available on Github, I have the CAN+ hat installed, the pin 3 is Relay1 and pin 5 is Digin4.
Can you, please, suggest, where have the SDA and SCL been moved?
I suppose, that's why my touch doesn't work.
If I'm wrong, can you suggest, what did I mess up?
Thank you in advance for your support.

[kwindrem]

We are out of GPIO pins! For some reason, the Can Plus hat uses the second SPI port which was the reason relay and digital input pins got moved around.

I did not move the I2C interface to other pins but it is not enabled in config.txt.

If you are using a touch screen that relies on I2C then it's not going to work. You will need to remove some of the GPIOs assigned to relays or digital inputs.

You will need to build a custom gpio_list file and install it in /data/setupOptions/RpiGpioSetup. Then run the setup script again and select the custom GPIO list.

I've found you need to remove the highest numbered relay or digital input as removing say digital in 4 with digital in 5 and 6 still in the list has odd behavior. Decide how many relays and digital inputs you can do away with then remove them starting with relay 6 and digital input 5 and 6 (6 is the shutdown pin). You may also need to reassign the pins actually used for the remaining relay and digital inputs to avoid the I2C pins.

If you do not need any relay or digital inputs, then you can simply uninstall RpiGpioSetup to free up the pins.

Note the Raspberry PI 7" touchscreen does not use the I2C bus. I've got one on my test system and works fine with the recent changes.