Clean up envs / variants

buildroot/share/PlatformIO/scripts/STEVAL__F401XX.py

         env["LINKFLAGS"][i] = "-Wl,-T" + custom_ld_script
     elif flag == "-T":
         env["LINKFLAGS"][i + 1] = custom_ld_script
-
-

buildroot/share/PlatformIO/variants/MEEB_3DP/variant.h

-#ifndef _VARIANT_ARDUINO_STM32_
-#define _VARIANT_ARDUINO_STM32_
+#pragma once
 
 #define digitalPinToPort(P)        ( PIN_MAP[P].gpio_device )
 #define digitalPinToBitMask(P)     ( BIT(PIN_MAP[P].gpio_bit) )
 #define portOutputRegister(port)   ( &(port->regs->ODR) )
 #define portInputRegister(port)    ( &(port->regs->IDR) )
 
-#define portSetRegister(pin)		( &(PIN_MAP[pin].gpio_device->regs->BSRR) )
-#define portClearRegister(pin)		( &(PIN_MAP[pin].gpio_device->regs->BRR) )
+#define portSetRegister(pin)       ( &(PIN_MAP[pin].gpio_device->regs->BSRR) )
+#define portClearRegister(pin)     ( &(PIN_MAP[pin].gpio_device->regs->BRR) )
 
-#define portConfigRegister(pin)		( &(PIN_MAP[pin].gpio_device->regs->CRL) )
+#define portConfigRegister(pin)    ( &(PIN_MAP[pin].gpio_device->regs->CRL) )
 
 static const uint8_t SS   = BOARD_SPI1_NSS_PIN;
 static const uint8_t SS1  = BOARD_SPI2_NSS_PIN;
 static const uint8_t MOSI = BOARD_SPI1_MOSI_PIN;
 static const uint8_t MISO = BOARD_SPI1_MISO_PIN;
 static const uint8_t SCK  = BOARD_SPI1_SCK_PIN;
-
-#endif /* _VARIANT_ARDUINO_STM32_ */

platformio.ini

 #
 
 # Automatic targets - enable auto-uploading
-# targets = upload
+#targets = upload
 
 #
 # By default platformio build will abort after 5 errors.
 boards_dir   = buildroot/share/PlatformIO/boards
 default_envs = mega2560
 
+#
+# The 'common' values are used for most Marlin builds
+#
 [common]
 default_src_filter = +<src/*> -<src/config> -<src/HAL> +<src/HAL/shared>
 extra_scripts = pre:buildroot/share/PlatformIO/scripts/common-cxxflags.py
   SailfishLCD=https://github.com/mikeshub/SailfishLCD/archive/master.zip
   SlowSoftI2CMaster=https://github.com/mikeshub/SlowSoftI2CMaster/archive/master.zip
 
-# Common traits for environments using HAL/STM32
-[base_stm32]
-platform      = ststm32@<6.2.0
-platform_packages = framework-arduinoststm32@>=4.10700,<4.10800
-lib_deps      = ${common.lib_deps}
-lib_ignore    = SoftwareSerial
-build_flags   = ${common.build_flags}
-  -IMarlin/src/HAL/STM32 -std=gnu++14
-  -DUSBCON -DUSBD_USE_CDC
-build_unflags = -std=gnu++11
-src_filter    = ${common.default_src_filter} +<src/HAL/STM32>
-
-[common_stm32]
-platform      = ${base_stm32.platform}
-extends       = base_stm32
-build_flags   = ${base_stm32.build_flags} -DUSBD_VID=0x0483
-
-# Common traits for environments using HAL/STM32F1
-[common_stm32f1]
-platform      = ${common_stm32.platform}
-build_flags   = !python Marlin/src/HAL/STM32F1/build_flags.py
-  ${common.build_flags} -std=gnu++14 -DHAVE_SW_SERIAL
-build_unflags = -std=gnu++11
-src_filter    = ${common.default_src_filter} +<src/HAL/STM32F1>
-lib_ignore    =
-  Adafruit NeoPixel
-  SPI
-lib_deps      = ${common.lib_deps}
-  SoftwareSerialM=https://github.com/FYSETC/SoftwareSerialM/archive/master.zip
-
-[common_avr8]
-board_build.f_cpu = 16000000L
-lib_deps          = ${common.lib_deps}
-  TMC26XStepper=https://github.com/trinamic/TMC26XStepper/archive/master.zip
-src_filter        = ${common.default_src_filter} +<src/HAL/AVR>
-
-# Globally defined properties
-# inherited by all environments
+#
+# Default values apply to all 'env:' prefixed environments
+#
 [env]
 framework     = arduino
 build_flags   = ${common.build_flags}
 #                               #
 #################################
 
+#################################
+#                               #
+#       AVR Architecture        #
+#                               #
+#################################
+
+#
+# AVR (8-bit) Common Environment values
+#
+[common_avr8]
+board_build.f_cpu = 16000000L
+lib_deps          = ${common.lib_deps}
+  TMC26XStepper=https://github.com/trinamic/TMC26XStepper/archive/master.zip
+src_filter        = ${common.default_src_filter} +<src/HAL/AVR>
+
 #
 # ATmega2560
 #
 platform      = teensy
 extends       = env:at90usb1286_cdc
 
+#################################
+#                               #
+#       DUE Architecture        #
+#                               #
+#################################
+
 #
 # Due (Atmel SAM3X8E ARM Cortex-M3)
 #
 extends       = common_DUE_archim
 build_flags   = ${common_DUE_archim.build_flags} -funwind-tables -mpoke-function-name
 
+#################################
+#                               #
+#      SAMD51 Architecture      #
+#                               #
+#################################
+
+#
+# Adafruit Grand Central M4 (Atmel SAMD51P20A ARM Cortex-M4)
+#
+[env:SAMD51_grandcentral_m4]
+platform       = atmelsam
+board          = adafruit_grandcentral_m4
+build_flags    = ${common.build_flags} -std=gnu++17 -Wno-register
+build_unflags  = -std=gnu++11
+src_filter     = ${common.default_src_filter} +<src/HAL/SAMD51>
+lib_deps       = ${common.lib_deps}
+  SoftwareSerialM=https://github.com/FYSETC/SoftwareSerialM/archive/master.zip
+  Adafruit_SPIFlash=https://github.com/adafruit/Adafruit_SPIFlash/archive/master.zip
+debug_tool     = jlink
+
+#################################
+#                               #
+#     LPC176x Architecture      #
+#                               #
+#################################
+
 #
 # NXP LPC176x ARM Cortex-M3
 #
 extends   = common_LPC
 board     = nxp_lpc1769
 
+#################################
+#                               #
+#      STM32 Architecture       #
+#                               #
+#################################
+
+#
+# HAL/STM32 Base Environment values
+#
+[base_stm32]
+platform      = ststm32@<6.2.0
+platform_packages = framework-arduinoststm32@>=4.10700,<4.10800
+lib_deps      = ${common.lib_deps}
+lib_ignore    = SoftwareSerial
+build_flags   = ${common.build_flags}
+  -IMarlin/src/HAL/STM32 -std=gnu++14
+  -DUSBCON -DUSBD_USE_CDC
+build_unflags = -std=gnu++11
+src_filter    = ${common.default_src_filter} +<src/HAL/STM32>
+
+#
+# HAL/STM32 Common Environment values
+#
+[common_stm32]
+platform      = ${base_stm32.platform}
+extends       = base_stm32
+build_flags   = ${base_stm32.build_flags} -DUSBD_VID=0x0483
+
+#
+# HAL/STM32F1 Common Environment values
+#
+[common_stm32f1]
+platform      = ${common_stm32.platform}
+build_flags   = !python Marlin/src/HAL/STM32F1/build_flags.py
+  ${common.build_flags} -std=gnu++14 -DHAVE_SW_SERIAL
+build_unflags = -std=gnu++11
+src_filter    = ${common.default_src_filter} +<src/HAL/STM32F1>
+lib_ignore    =
+  Adafruit NeoPixel
+  SPI
+lib_deps      = ${common.lib_deps}
+  SoftwareSerialM=https://github.com/FYSETC/SoftwareSerialM/archive/master.zip
+
 #
 # STM32F103RC
 #
                     -DUSE_USB_COMPOSITE
                     -DVECT_TAB_OFFSET=0x2000
                     -DGENERIC_BOOTLOADER
-extra_scripts     = pre:buildroot/share/PlatformIO/scripts/STM32F103RC_MEEB_3DP_create_variant.py
+extra_scripts     = pre:buildroot/share/PlatformIO/scripts/STM32F1_create_variant.py
     buildroot/share/PlatformIO/scripts/STM32F103RC_MEEB_3DP.py
 lib_deps          = ${common_stm32f1.lib_deps}
     USBComposite for STM32F1@==0.91
 lib_ignore        = Adafruit NeoPixel, SailfishLCD, SlowSoftI2CMaster, SoftwareSerial
 
 #
-# Teensy 3.1 / 3.2 (ARM Cortex-M4)
+# RUMBA32
 #
-[env:teensy31]
-platform      = teensy
-board         = teensy31
-lib_deps      = ${common.lib_deps}
-  TMC26XStepper=https://github.com/trinamic/TMC26XStepper/archive/master.zip
-lib_ignore    = Adafruit NeoPixel
-src_filter    = ${common.default_src_filter} +<src/HAL/TEENSY31_32>
+
+[common_rumba32]
+platform      = ${base_stm32.platform}
+extends       = base_stm32
+build_flags   = ${base_stm32.build_flags} -Os
+  -DSTM32F4xx -DARDUINO_RUMBA32_F446VE -DARDUINO_ARCH_STM32 "-DBOARD_NAME=\"RUMBA32_F446VE\""
+  -DSTM32F446xx "-DUSB_PRODUCT=\"RUMBA32_F446VE\""
+  -DHAL_PCD_MODULE_ENABLED
+  -DDISABLE_GENERIC_SERIALUSB
+  -DHAL_UART_MODULE_ENABLED
+board         = rumba32_f446ve
+upload_protocol = dfu
+monitor_speed = 500000
 
 #
-# Teensy 3.5 / 3.6 (ARM Cortex-M4)
+# RUMBA32 F446VE
 #
-[env:teensy35]
-platform      = teensy
-board         = teensy35
-lib_deps      = ${common.lib_deps}
-  TMC26XStepper=https://github.com/trinamic/TMC26XStepper/archive/master.zip
-lib_ignore    = Adafruit NeoPixel
-src_filter    = ${common.default_src_filter} +<src/HAL/TEENSY35_36>
+[env:rumba32_f446ve]
+platform      = ${common_rumba32.platform}
+extends       = common_rumba32
+build_flags   = ${common_rumba32.build_flags} -DUSBD_VID=0x0483
+
+#
+# MKS RUMBA32 (adds TMC2208/2209 UART interface and AUX-1)
+#
+[env:rumba32_mks]
+platform      = ${common_rumba32.platform}
+extends       = common_rumba32
+build_flags   = ${common_rumba32.build_flags} -DUSBD_VID=0x8000
+
+#################################
+#                               #
+#      Other Architectures      #
+#                               #
+#################################
 
 #
 # Espressif ESP32
 #board_build.flash_mode = qio
 
 #
+# Teensy 3.1 / 3.2 (ARM Cortex-M4)
+#
+[env:teensy31]
+platform      = teensy
+board         = teensy31
+lib_deps      = ${common.lib_deps}
+  TMC26XStepper=https://github.com/trinamic/TMC26XStepper/archive/master.zip
+lib_ignore    = Adafruit NeoPixel
+src_filter    = ${common.default_src_filter} +<src/HAL/TEENSY31_32>
+
+#
+# Teensy 3.5 / 3.6 (ARM Cortex-M4)
+#
+[env:teensy35]
+platform      = teensy
+board         = teensy35
+lib_deps      = ${common.lib_deps}
+  TMC26XStepper=https://github.com/trinamic/TMC26XStepper/archive/master.zip
+lib_ignore    = Adafruit NeoPixel
+src_filter    = ${common.default_src_filter} +<src/HAL/TEENSY35_36>
+
+#
 # Native
 # No supported Arduino libraries, base Marlin only
 #
 src_filter      = ${common.default_src_filter} +<src/HAL/LINUX>
 
 #
-# Adafruit Grand Central M4 (Atmel SAMD51P20A ARM Cortex-M4)
-#
-[env:SAMD51_grandcentral_m4]
-platform       = atmelsam
-board          = adafruit_grandcentral_m4
-build_flags    = ${common.build_flags} -std=gnu++17 -Wno-register
-build_unflags  = -std=gnu++11
-src_filter     = ${common.default_src_filter} +<src/HAL/SAMD51>
-lib_deps       = ${common.lib_deps}
-  SoftwareSerialM=https://github.com/FYSETC/SoftwareSerialM/archive/master.zip
-  Adafruit_SPIFlash=https://github.com/adafruit/Adafruit_SPIFlash/archive/master.zip
-debug_tool     = jlink
-
-#
-# RUMBA32
-#
-
-[common_rumba32]
-platform      = ${base_stm32.platform}
-extends       = base_stm32
-build_flags   = ${base_stm32.build_flags} -Os
-  -DSTM32F4xx -DARDUINO_RUMBA32_F446VE -DARDUINO_ARCH_STM32 "-DBOARD_NAME=\"RUMBA32_F446VE\""
-  -DSTM32F446xx "-DUSB_PRODUCT=\"RUMBA32_F446VE\""
-  -DHAL_PCD_MODULE_ENABLED
-  -DDISABLE_GENERIC_SERIALUSB
-  -DHAL_UART_MODULE_ENABLED
-board         = rumba32_f446ve
-upload_protocol = dfu
-monitor_speed = 500000
-
-#
-# RUMBA32 F446VE
-#
-[env:rumba32_f446ve]
-platform      = ${common_rumba32.platform}
-extends       = common_rumba32
-build_flags   = ${common_rumba32.build_flags} -DUSBD_VID=0x0483
-
-#
-# MKS RUMBA32 (adds TMC2208/2209 UART interface and AUX-1)
-#
-[env:rumba32_mks]
-platform      = ${common_rumba32.platform}
-extends       = common_rumba32
-build_flags   = ${common_rumba32.build_flags} -DUSBD_VID=0x8000
-
-#
 # Just print the dependency tree
 #
 [env:include_tree]