Add platformio support for stm32 (#8246)

[2.0] Add platformio support for stm32

Marlin/src/HAL/HAL.h

@@ -45,7 +45,7 @@
   #define CPU_32_BIT
   #include "math_32bit.h"
   #include "HAL_LPC1768/HAL.h"
-#elif defined(__STM32F1__)
+#elif defined(__STM32F1__) || defined(TARGET_STM32F1)
   #define CPU_32_BIT
   #include "math_32bit.h"
   #include "HAL_STM32F1/HAL_Stm32f1.h"

Marlin/src/HAL/HAL_STM32F1/HAL_Stm32f1.h

@@ -42,11 +42,25 @@
 
 #include "Arduino.h"
 
+// --------------------------------------------------------------------------
+// Undefine DEBUG_ settings
+// --------------------------------------------------------------------------
+
+
+#undef DEBUG_NONE
+#undef DEBUG_FAULT
+#undef DEBUG_ALL
+
+// --------------------------------------------------------------------------
+// Includes
+// --------------------------------------------------------------------------
+
 #include "fastio_Stm32f1.h"
 #include "watchdog_Stm32f1.h"
 
 #include "HAL_timers_Stm32f1.h"
 
+
 // --------------------------------------------------------------------------
 // Defines
 // --------------------------------------------------------------------------

Marlin/src/HAL/HAL_STM32F1/stm32f1_flag_script.py

@@ -0,0 +1,55 @@
+from __future__ import print_function
+import sys
+
+#dynamic build flags for generic compile options
+if __name__ == "__main__":
+  args = " ".join([ "-std=gnu11",
+                    "-std=gnu++11",
+                    "-Os",
+                    "-mcpu=cortex-m3",
+                    "-mthumb",
+
+                    "-ffreestanding",
+                    "-fsigned-char",
+                    "-fno-move-loop-invariants",
+                    "-fno-strict-aliasing",
+
+                    "--specs=nano.specs",
+                    "--specs=nosys.specs",
+
+                    "-IMarlin/src/HAL",
+
+                    "-MMD",
+                    "-MP",
+                    "-DTARGET_STM32F1"
+                  ])
+
+  for i in range(1, len(sys.argv)):
+    args += " " + sys.argv[i]
+
+  print(args)
+
+# extra script for linker options
+else:
+  from SCons.Script import DefaultEnvironment
+  env = DefaultEnvironment()
+  env.Append(
+      ARFLAGS=["rcs"],
+
+      ASFLAGS=["-x", "assembler-with-cpp"],
+
+      CXXFLAGS=[
+          "-fabi-version=0",
+          "-fno-use-cxa-atexit",
+          "-fno-threadsafe-statics"
+      ],
+      LINKFLAGS=[
+          "-Os",
+          "-mcpu=cortex-m3",
+          "-ffreestanding",
+          "-mthumb",
+          "--specs=nano.specs",
+          "--specs=nosys.specs",
+          "-u_printf_float",
+      ],
+  )

platformio.ini

@@ -182,3 +182,12 @@ debug_server   =
   -speed
   auto
   -noir
+
+[env:STM32F1]
+platform    = ststm32
+framework   = arduino
+board       = genericSTM32F103RE
+build_flags = !python Marlin/src/HAL/HAL_STM32F1/stm32f1_flag_script.py
+lib_deps    = ${common.lib_deps}
+src_filter  = ${common.default_src_filter}
+