Add RUMBA32 support to PIO builds

[thisiskeithb]

Description

Add RUMBA32 support when using PIO to build Marlin. I have no way to test this, but was requested in #16201.

Benefits

Users can compile firmware with PlatformIO.

Related Issues

#16201, #16029, #14942

[thinkyhead]

Are there any MOTHERBOARD selections that should now use the rumba32_f446ve environment?

[thisiskeithb]

Are there any MOTHERBOARD selections that should now use the rumba32_f446ve environment?

Digging through some links, I found this page that references BOARD_RUMBA32 which uses STM32F4 instead to build for RUMBA32.

@leseaw: If you set default_envs = STM32F4 in platformio.ini, does the firmware work?

[leseaw]

I did it with the data from the FR and it built and went with it as I had expected.
Aus3D/RUMBA32#11
Built with today's version.
If desired I can test it even more.

[thisiskeithb]

I did it with the data from the FR and it built and went with it as I had expected.
Aus3D/RUMBA32#11

Can you test if default_envs = STM32F4 results in working firmware?

[leseaw]

Tomorrow, there platformio on other computers in the company.

[thisiskeithb]

I updated the original post with some related issues.

This board should use STM32F4:

Marlin/Marlin/src/pins/stm32/pins_RUMBA32.h

Lines 24 to 25 in 6a514a1

	#ifndef STM32F4
	#error "Oops! Select an STM32F4 board in 'Tools > Board.'"

I don't have this hardware to test with, so I'll need help to finish adding full PIO build support if STM32F4 doesn't work.

[sjasonsmith]

Digging through some links, I found this page that references BOARD_RUMBA32 which uses STM32F4 instead to build for RUMBA32.

That comment in the pins file is incorrect, it just wasn’t caught since nobody was building in PlatformIO. I know from other issues that it definitely uses HAL_STM32 when building from arduino, which doesn’t align with the STM32F4 env.

The generic STM32F4 env could potentially be updated to use HAL_STM32, but I suspect you will need a separate environment for the proper variants files to be used anyway.

[thisiskeithb]

@mks-viva pointed out that MKS has their their own RUMBA32 variant, so we can probably bring that board & support in with this PR as well:

#
# MKS RUMBA32(add TMC2208/2209 UART interface and AUX-1)
#
[env:mks_rumba32]
platform      = ststm32
framework     = arduino
board         = rumba32_f446ve
build_flags   = ${common.build_flags}
 -DSTM32F4xx -DARDUINO_RUMBA32_F446VE -DARDUINO_ARCH_STM32 "-DBOARD_NAME=\"RUMBA32_F446VE\""
 -DSTM32F446xx -DUSBCON -DUSBD_VID=0x8000
  "-DUSB_MANUFACTURER=\"Unknown\""
  "-DUSB_PRODUCT=\"RUMBA32_F446VE\""
  -DHAL_PCD_MODULE_ENABLED
  -DUSBD_USE_CDC
  -DDISABLE_GENERIC_SERIALUSB
  -DHAL_UART_MODULE_ENABLED
  -Os
lib_deps      = ${common.lib_deps}
lib_ignore    = Adafruit NeoPixel
src_filter    = ${common.default_src_filter} +<src/HAL/HAL_STM32> +<src/HAL/HAL_STM32_F4_F7> -<src/HAL/HAL_STM32_F4_F7/STM32F7>
monitor_speed = 250000
upload_protocol = dfu