Add support for STM32F1

Author: mikaelpatel

src/Scheduler.cpp

@@ -40,10 +40,17 @@ extern size_t __malloc_margin;
 #if !defined(RAMEND)
 #define RAMEND 0x20088000
 #endif
+
 #elif defined(ARDUINO_ARCH_SAMD)
 #if !defined(RAMEND)
 #define RAMEND 0x20008000
 #endif
+
+#elif defined(ARDUINO_ARCH_STM32F1)
+#if !defined(RAMEND)
+#define RAMEND 0x20005000
+#endif
+
 #endif
 
 // Stack magic pattern

src/Scheduler.h

@@ -127,6 +127,7 @@ class SchedulerClass {
 #else
   static const size_t DEFAULT_MAIN_STACK_SIZE = 256;
 #endif
+
 #elif defined(ARDUINO_ARCH_SAM)
   /** Default stack size and stack max. */
   static const size_t DEFAULT_STACK_SIZE = 1024;
@@ -139,6 +140,12 @@ class SchedulerClass {
   static const size_t DEFAULT_MAIN_STACK_SIZE = 2048;
   static const size_t STACK_MAX = 16384;
 
+#elif defined(ARDUINO_ARCH_STM32F1)
+  /** Default stack size and stack max. */
+  static const size_t DEFAULT_STACK_SIZE = 1024;
+  static const size_t DEFAULT_MAIN_STACK_SIZE = 2048;
+  static const size_t STACK_MAX = 16384;
+
 #else
 #error "Scheduler.h: Arduino board not supported"
 #endif