Ender3v3se pin updates

[danwel3]

Description

Updates to pins for the Creality Ender 3 V3 SE.

Requirements

• Creality Ender 3 V3 SE w/CR4NS200320C13

Benefits

• Update for some pin definitions (BLTouch, LCD Screen, EEPROM)
• Add assignment for LCD_SERIAL_PORT. Note that the screen will not work with Marlin at this stage as the screen is using a different instruction set to the Ender 2 DWIN screens.

[thinkyhead]

It looks like so far we don't have any example configs using BOARD_CREALITY_CR4NS, so we should put something together for that to get the ball rolling, even if it's a bit broken — because nothing gets stuff fixed quicker than putting it out broken.

[ThomasToka]

@thinkyhead have seen this release?

https://github.com/CrealityOfficial/Ender-3V3-SE/blob/main/Marlin/src/pins/stm32f1/pins_CREALITY_V3_GD303.h

[thinkyhead]

Thanks @ThomasToka — We can use that branch as reference for the configuration of the Ender-3 V3 SE to some extent. If there are customizations to the code that we have not brought over, well, we can add that Marlin fork to the pile of Marlin forks that we are gradually adapting to the current upstream codebase. I almost have CR-6 SE and Ender-5 S1 working too.

[thinkyhead]

Dedicated DIAG pins are interesting. Is this board pre-built with Trinamic drivers with UART, or does it have other types of stepper drivers? A board that has dedicated DIAG pins may also make these pins available for Trinamic SPI and standalone drivers.

[queeup]

Now we need to solve TJC display issue. Then we can use Ender 3 V3 SE with upstream Marlin.

[mansona]

@queeup is there an issue or PR that is keeping track of that display issue? I'm just asking so I can subscribe and follow along 😄

[queeup]

@mansona I was spamming. Sorry. This PR is not about TJC display.