Merge upstream changes from Marlin 2.1.2

ini/stm32f1.ini

@@ -171,6 +171,16 @@ board   = genericSTM32F103RC
 extends = STM32F103Rx_creality_xfer
 board   = genericSTM32F103RC
 
+#
+# Creality 512K (STM32F103VE)
+#
+[env:STM32F103VE_creality]
+extends             = STM32F103Rx_creality
+board               = genericSTM32F103VE
+board_build.variant = MARLIN_F103Vx
+build_flags         = ${stm32_variant.build_flags}
+                      -DSS_TIMER=4 -DTIMER_SERVO=TIM5
+                      -DENABLE_HWSERIAL3 -DTRANSFER_CLOCK_DIV=8
 #
 # BigTreeTech SKR Mini E3 V2.0 & DIP / SKR CR6 (STM32F103RET6 ARM Cortex-M3)
 #
@@ -216,23 +226,35 @@ build_flags                 = ${stm32_variant.build_flags}
 build_unflags               = ${stm32_variant.build_unflags}
                               -DUSBCON -DUSBD_USE_CDC
 
-#
-# MKS Robin Nano V1.2 and V2
-#
-[env:mks_robin_nano35]
+[mks_robin_nano_v1v2_common]
 extends                     = stm32_variant
 board                       = genericSTM32F103VE
 board_build.variant         = MARLIN_F103Vx
 board_build.encrypt_mks     = Robin_nano35.bin
 board_build.offset          = 0x7000
 board_upload.offset_address = 0x08007000
+debug_tool                  = stlink
+upload_protocol             = stlink
+
+#
+# MKS Robin Nano V1.2 and V2
+#
+[env:mks_robin_nano_v1v2]
+extends                     = mks_robin_nano_v1v2_common
 build_flags                 = ${stm32_variant.build_flags}
                               -DMCU_STM32F103VE -DSS_TIMER=4 -DENABLE_HWSERIAL3
                               -DTIMER_TONE=TIM3 -DTIMER_SERVO=TIM2
 build_unflags               = ${stm32_variant.build_unflags}
                               -DUSBCON -DUSBD_USE_CDC
-debug_tool                  = jlink
-upload_protocol             = jlink
+
+#
+# MKS/ZNP Robin Nano V1.2 and V2 with native USB modification
+#
+[env:mks_robin_nano_v1v2_usbmod]
+extends                     = mks_robin_nano_v1v2_common
+build_flags                 = ${common_stm32.build_flags}
+                              -DMCU_STM32F103VE -DSS_TIMER=4
+                              -DTIMER_TONE=TIM3 -DTIMER_SERVO=TIM2
 
 #
 # Mingda MPX_ARM_MINI