stm32duino
diff --git a/‎src/port.c
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+5Lines changed: 5 additions & 0 deletions b/‎src/port.c
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+5Lines changed: 5 additions & 0 deletions
diff --git a/‎src/portmacro.h
Copy file name to clipboardExpand all lines: src/portmacro.h
+5Lines changed: 5 additions & 0 deletions b/‎src/portmacro.h
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+5Lines changed: 5 additions & 0 deletions
@@ -23,13 +23,18 @@
 #endif
 
 #if (__CORTEX_M == 4U)
+#if (__FPU_PRESENT == 0)
+/* Fallback to CM3 port as there is no FPU */
+#include "../portable/GCC/ARM_CM3/port.c"
+#else
 /* MPU not supported */
 #if 0 /*(__MPU_PRESENT == 1)*/
 #include "../portable/GCC/ARM_CM4_MPU/port.c"
 #else
 #include "../portable/GCC/ARM_CM4F/port.c"
 #endif
 #endif
+#endif
 
 #if (__CORTEX_M == 7U)
 /* MPU not supported */
 
@@ -28,13 +28,18 @@ inline __attribute__(( always_inline )) static BaseType_t xPortIsInsideInterrupt
 #endif
 
 #if (__CORTEX_M == 4U)
+#if (__FPU_PRESENT == 0)
+/* Fallback to CM3 port as there is no FPU */
+#include "../portable/GCC/ARM_CM3/portmacro.h"
+#else
 /* MPU not supported */
 #if 0 /*(__MPU_PRESENT == 1)*/
 #include "../portable/GCC/ARM_CM4_MPU/portmacro.h"
 #else
 #include "../portable/GCC/ARM_CM4F/portmacro.h"
 #endif
 #endif
+#endif
 
 #if (__CORTEX_M == 7U)
 /* MPU not supported */