Support 512K "RCT6" in BTT SKR Mini (#15890)

.travis.yml

 
   # Extended STM32 Environments
   - TEST_PLATFORM="STM32F103RC_bigtree"
-  - TEST_PLATFORM="STM32F103RC_bigtree_USB"
+  - TEST_PLATFORM="STM32F103RC_bigtree_NOUSB"
   - TEST_PLATFORM="STM32F103RC_fysetc"
   - TEST_PLATFORM="jgaurora_a5s_a1"
   - TEST_PLATFORM="STM32F103VE_longer"

Marlin/src/HAL/HAL_STM32F1/HAL.h

 // Defines
 // ------------------------
 
+#ifndef STM32_FLASH_SIZE
+  #ifdef MCU_STM32F103RE
+    #define STM32_FLASH_SIZE 512
+  #else
+    #define STM32_FLASH_SIZE 256
+  #endif
+#endif
+
 #ifdef SERIAL_USB
   #ifndef USE_USB_COMPOSITE
     #define UsbSerial Serial

Marlin/src/pins/pins.h

 #elif MB(MKS_ROBIN_LITE)
   #include "stm32/pins_MKS_ROBIN_LITE.h"        // STM32F1                                env:mks_robin_lite
 #elif MB(BIGTREE_SKR_MINI_V1_1)
-  #include "stm32/pins_BIGTREE_SKR_MINI_V1_1.h" // STM32F1                                env:STM32F103RC_bigtree
+  #include "stm32/pins_BIGTREE_SKR_MINI_V1_1.h" // STM32F1                                env:STM32F103RC_bigtree env:STM32F103RC_bigtree_512K env:STM32F103RC_bigtree_NOUSB env:STM32F103RC_bigtree_512K_NOUSB
 #elif MB(BTT_SKR_MINI_E3_V1_2)
-  #include "stm32/pins_BTT_SKR_MINI_E3_V1_2.h"  // STM32F1                                env:STM32F103RC_bigtree
+  #include "stm32/pins_BTT_SKR_MINI_E3_V1_2.h"  // STM32F1                                env:STM32F103RC_bigtree env:STM32F103RC_bigtree_512K env:STM32F103RC_bigtree_NOUSB env:STM32F103RC_bigtree_512K_NOUSB
 #elif MB(BIGTREE_SKR_MINI_E3)
-  #include "stm32/pins_BIGTREE_SKR_MINI_E3.h"   // STM32F1                                env:STM32F103RC_bigtree
+  #include "stm32/pins_BIGTREE_SKR_MINI_E3.h"   // STM32F1                                env:STM32F103RC_bigtree env:STM32F103RC_bigtree_512K env:STM32F103RC_bigtree_NOUSB env:STM32F103RC_bigtree_512K_NOUSB
 #elif MB(BIGTREE_SKR_E3_DIP)
-  #include "stm32/pins_BIGTREE_SKR_E3_DIP.h"    // STM32F1                                env:STM32F103RC_bigtree
+  #include "stm32/pins_BIGTREE_SKR_E3_DIP.h"    // STM32F1                                env:STM32F103RC_bigtree env:STM32F103RC_bigtree_512K env:STM32F103RC_bigtree_NOUSB env:STM32F103RC_bigtree_512K_NOUSB
 #elif MB(JGAURORA_A5S_A1)
   #include "stm32/pins_JGAURORA_A5S_A1.h"       // STM32F1                                env:jgaurora_a5s_a1
 #elif MB(FYSETC_AIO_II)

Marlin/src/pins/stm32/pins_BIGTREE_SKR_E3_DIP.h

 // Ignore temp readings during development.
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000
 
-#ifdef MCU_STM32F103RE
-  #define STM32_FLASH_SIZE (512 * 1024)
-#else
-  #define STM32_FLASH_SIZE (256 * 1024)
-#endif
-
 #define FLASH_EEPROM_EMULATION
 #define EEPROM_PAGE_SIZE     uint16(0x800) // 2KB
-#define EEPROM_START_ADDRESS uint32(0x8000000 + STM32_FLASH_SIZE - 2 * EEPROM_PAGE_SIZE)
+#define EEPROM_START_ADDRESS uint32(0x8000000 + (STM32_FLASH_SIZE) * 1024 - 2 * EEPROM_PAGE_SIZE)
 #undef E2END
 #define E2END                (EEPROM_PAGE_SIZE - 1) // 2KB
 

Marlin/src/pins/stm32/pins_BIGTREE_SKR_MINI_E3.h

 // Ignore temp readings during development.
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000
 
-#ifdef MCU_STM32F103RE
-  #define STM32_FLASH_SIZE (512 * 1024)
-#else
-  #define STM32_FLASH_SIZE (256 * 1024)
-#endif
-
 #define FLASH_EEPROM_EMULATION
 #define EEPROM_PAGE_SIZE     uint16(0x800) // 2KB
-#define EEPROM_START_ADDRESS uint32(0x8000000 + STM32_FLASH_SIZE - 2 * EEPROM_PAGE_SIZE)
+#define EEPROM_START_ADDRESS uint32(0x8000000 + (STM32_FLASH_SIZE) * 1024 - 2 * EEPROM_PAGE_SIZE)
 #undef E2END
 #define E2END                (EEPROM_PAGE_SIZE - 1) // 2KB
 

Marlin/src/pins/stm32/pins_BIGTREE_SKR_MINI_V1_1.h

 // Ignore temp readings during development.
 //#define BOGUS_TEMPERATURE_GRACE_PERIOD 2000
 
-#ifdef MCU_STM32F103RE
-  #define STM32_FLASH_SIZE (512 * 1024)
-#else
-  #define STM32_FLASH_SIZE (256 * 1024)
-#endif
-
 #define FLASH_EEPROM_EMULATION
 #define EEPROM_PAGE_SIZE     (0x800) // 2KB
-#define EEPROM_START_ADDRESS (0x8000000 + STM32_FLASH_SIZE - 2 * EEPROM_PAGE_SIZE)
+#define EEPROM_START_ADDRESS uint32(0x8000000 + (STM32_FLASH_SIZE) * 1024 - 2 * EEPROM_PAGE_SIZE)
 #define E2END                (EEPROM_PAGE_SIZE - 1)
 
 //

Marlin/src/pins/stm32/pins_BTT_SKR_MINI_E3_V1_2.h

 
 #define FLASH_EEPROM_EMULATION
 #define EEPROM_PAGE_SIZE     uint16(0x800) // 2KB
-#define EEPROM_START_ADDRESS uint32(0x8000000 + 256 * 1024 - 2 * EEPROM_PAGE_SIZE)
+#define EEPROM_START_ADDRESS uint32(0x8000000 + (STM32_FLASH_SIZE) * 1024 - 2 * EEPROM_PAGE_SIZE)
 #undef E2END
 #define E2END                (EEPROM_PAGE_SIZE - 1) // 2KB
 

buildroot/share/PlatformIO/ldscripts/STM32F103RC_SKR_MINI_512K.ld

+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 48K - 40
+  rom (rx)  : ORIGIN = 0x08007000, LENGTH = 512K - 28K
+}
+
+/* Provide memory region aliases for common.inc */
+REGION_ALIAS("REGION_TEXT", rom);
+REGION_ALIAS("REGION_DATA", ram);
+REGION_ALIAS("REGION_BSS", ram);
+REGION_ALIAS("REGION_RODATA", rom);
+
+/* Let common.inc handle the real work. */
+INCLUDE common.inc

buildroot/share/PlatformIO/scripts/STM32F103RC_SKR_MINI.py

 import os
 Import("env")
 
-# Relocate firmware from 0x08000000 to 0x08007000
+STM32_FLASH_SIZE = 256
+
 for define in env['CPPDEFINES']:
     if define[0] == "VECT_TAB_ADDR":
         env['CPPDEFINES'].remove(define)
+    if define[0] == "STM32_FLASH_SIZE":
+        STM32_FLASH_SIZE = define[1]
+
+# Relocate firmware from 0x08000000 to 0x08007000
 env['CPPDEFINES'].append(("VECT_TAB_ADDR", "0x08007000"))
 
-custom_ld_script = os.path.abspath("buildroot/share/PlatformIO/ldscripts/STM32F103RC_SKR_MINI.ld")
+custom_ld_script = os.path.abspath("buildroot/share/PlatformIO/ldscripts/STM32F103RC_SKR_MINI_" + str(STM32_FLASH_SIZE) + "K.ld")
 for i, flag in enumerate(env["LINKFLAGS"]):
     if "-Wl,-T" in flag:
         env["LINKFLAGS"][i] = "-Wl,-T" + custom_ld_script

platformio.ini

 #
 # BigTree SKR Mini V1.1 / SKR mini E3 / SKR E3 DIP (STM32F103RCT6 ARM Cortex-M3)
 #
+#   STM32F103RC_bigtree .............. RCT6 with 256K
+#   STM32F103RC_bigtree_NOUSB ........ RCT6 with 256K (no USB)
+#   STM32F103RC_bigtree_512K.......... RCT6 with 512K
+#   STM32F103RC_bigtree_512K_NOUSB ... RCT6 with 512K (no USB)
+#
+
 [env:STM32F103RC_bigtree]
 platform          = ststm32
 framework         = arduino
 platform_packages = tool-stm32duino
 extra_scripts     = buildroot/share/PlatformIO/scripts/STM32F103RC_SKR_MINI.py
 build_flags       = !python Marlin/src/HAL/HAL_STM32F1/build_flags.py
+  ${common.build_flags} -DDEBUG_LEVEL=0 -std=gnu++14 -DUSE_USB_COMPOSITE -DHAVE_SW_SERIAL -DSS_TIMER=4 -DSTM32_FLASH_SIZE=256
+build_unflags     = -std=gnu++11
+lib_deps          = ${common.lib_deps}
+  SoftwareSerialM=https://github.com/FYSETC/SoftwareSerialM/archive/master.zip
+lib_ignore        = Adafruit NeoPixel, SPI
+src_filter        = ${common.default_src_filter} +<src/HAL/HAL_STM32F1>
+monitor_speed     = 115200
+
+[env:STM32F103RC_bigtree_NOUSB]
+platform          = ststm32
+framework         = arduino
+board             = genericSTM32F103RC
+platform_packages = tool-stm32duino
+extra_scripts     = buildroot/share/PlatformIO/scripts/STM32F103RC_SKR_MINI.py
+build_flags       = !python Marlin/src/HAL/HAL_STM32F1/build_flags.py
   ${common.build_flags} -DDEBUG_LEVEL=0 -std=gnu++14 -DHAVE_SW_SERIAL -DSS_TIMER=4
 build_unflags     = -std=gnu++11
 lib_deps          = ${common.lib_deps}
 src_filter        = ${common.default_src_filter} +<src/HAL/HAL_STM32F1>
 monitor_speed     = 115200
 
-[env:STM32F103RC_bigtree_USB]
+[env:STM32F103RC_bigtree_512K]
+platform          = ststm32
+framework         = arduino
+board             = genericSTM32F103RC
+board_upload.maximum_size=524288
+platform_packages = tool-stm32duino
+extra_scripts     = buildroot/share/PlatformIO/scripts/STM32F103RC_SKR_MINI.py
+build_flags       = !python Marlin/src/HAL/HAL_STM32F1/build_flags.py
+  ${common.build_flags} -DDEBUG_LEVEL=0 -std=gnu++14 -DUSE_USB_COMPOSITE -DHAVE_SW_SERIAL -DSS_TIMER=4 -DSTM32_FLASH_SIZE=512
+build_unflags     = -std=gnu++11
+lib_deps          = ${common.lib_deps}
+  SoftwareSerialM=https://github.com/FYSETC/SoftwareSerialM/archive/master.zip
+lib_ignore        = Adafruit NeoPixel, SPI
+src_filter        = ${common.default_src_filter} +<src/HAL/HAL_STM32F1>
+monitor_speed     = 115200
+
+[env:STM32F103RC_bigtree_512K_NOUSB]
 platform          = ststm32
 framework         = arduino
 board             = genericSTM32F103RC
+board_upload.maximum_size=524288
 platform_packages = tool-stm32duino
 extra_scripts     = buildroot/share/PlatformIO/scripts/STM32F103RC_SKR_MINI.py
 build_flags       = !python Marlin/src/HAL/HAL_STM32F1/build_flags.py
-  ${common.build_flags} -DDEBUG_LEVEL=0 -std=gnu++14 -DUSE_USB_COMPOSITE -DHAVE_SW_SERIAL -DSS_TIMER=4
+  ${common.build_flags} -DDEBUG_LEVEL=0 -std=gnu++14 -DHAVE_SW_SERIAL -DSS_TIMER=4 -DSTM32_FLASH_SIZE=512
 build_unflags     = -std=gnu++11
 lib_deps          = ${common.lib_deps}
   SoftwareSerialM=https://github.com/FYSETC/SoftwareSerialM/archive/master.zip