🔨 Creality RCT6 (256K) variants (#23599)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

ini/stm32f1-maple.ini

@@ -114,7 +114,7 @@ monitor_speed     = 115200
 #
 # Creality (STM32F103RET6)
 #
-[env:STM32F103RET6_creality_maple]
+[env:STM32F103RE_creality_maple]
 extends              = env:STM32F103RE_maple
 build_flags          = ${common_stm32f1.build_flags} -DTEMP_TIMER_CHAN=4
 board_build.address  = 0x08007000

ini/stm32f1.ini

@@ -103,11 +103,10 @@ build_unflags               = ${common_STM32F103RC_variant.build_unflags}
 debug_tool                  = stlink
 
 #
-# Creality (STM32F103RET6)
+# Creality (STM32F103Rx)
 #
-[env:STM32F103RET6_creality]
+[STM32F103Rx_creality]
 extends                     = stm32_variant
-board                       = genericSTM32F103RE
 board_build.variant         = MARLIN_F103Rx
 board_build.offset          = 0x7000
 board_upload.offset_address = 0x08007000
@@ -123,12 +122,37 @@ monitor_speed               = 115200
 debug_tool                  = jlink
 upload_protocol             = jlink
 
-[env:STM32F103RET6_creality_xfer]
-extends         = env:STM32F103RET6_creality
-extra_scripts   = ${env:STM32F103RET6_creality.extra_scripts}
+#
+# Custom upload to SD via Marlin with Binary Protocol
+#
+[STM32F103Rx_creality_xfer]
+extends         = STM32F103Rx_creality
+extra_scripts   = ${STM32F103Rx_creality.extra_scripts}
                   pre:buildroot/share/scripts/upload.py
 upload_protocol = custom
 
+#
+# Creality 512K (STM32F103RE)
+#
+[env:STM32F103RE_creality]
+extends = STM32F103Rx_creality
+board   = genericSTM32F103RE
+
+[env:STM32F103RE_creality_xfer]
+extends = STM32F103Rx_creality_xfer
+board   = genericSTM32F103RE
+
+#
+# Creality 256K (STM32F103RC)
+#
+[env:STM32F103RC_creality]
+extends = STM32F103Rx_creality
+board   = genericSTM32F103RC
+
+[env:STM32F103RC_creality_xfer]
+extends = STM32F103Rx_creality_xfer
+board   = genericSTM32F103RC
+
 #
 # BigTree SKR Mini E3 V2.0 & DIP / SKR CR6 (STM32F103RET6 ARM Cortex-M3)
 #