Added GetStackPointer function to CoreN2G

src/AnalogIn.h

@@ -105,7 +105,7 @@ namespace LegacyAnalogIn
 	AnalogCallback_t AnalogInSetCallback(AnalogCallback_t) noexcept;
 
 	// Start converting the enabled channels, to include the specified ones. Disabled channels are ignored.
-	void AnalogInStartConversion(uint32_t channels = 0xFFFFFFFF) noexcept;
+	void AnalogInStartConversion(uint32_t channels = 0xFFFFFFFFu) noexcept;
 
 	// Finalise a conversion
 #if SAME70
@@ -116,7 +116,7 @@ namespace LegacyAnalogIn
 
 	// Check whether all conversions of the specified channels have been completed since the last call to AnalogStartConversion.
 	// Disabled channels are ignored
-	bool AnalogInCheckReady(uint32_t channels = 0xFFFFFFFF) noexcept;
+	bool AnalogInCheckReady(uint32_t channels = 0xFFFFFFFFu) noexcept;
 
 	// Convert a pin number to an AnalogIn channel
 	extern AnalogChannelNumber PinToAdcChannel(uint32_t pin) noexcept;

src/CoreIO.h

@@ -200,6 +200,21 @@ inline void memcpyf(float *dst, const float *src, size_t numFloats) noexcept
 	memcpyu32(reinterpret_cast<uint32_t*>(dst), reinterpret_cast<const uint32_t*>(src), numFloats);
 }
 
+// Get the stack pointer
+#ifdef __ECV__
+
+// eCv doesn't accept the GCC syntax used to get the stack pointer, so leave it undefined
+extern const uint32_t *_ecv_array GetStackPointer() noexcept;
+
+#else
+
+static inline const uint32_t *_ecv_array GetStackPointer() noexcept
+{
+	register const uint32_t * stack_ptr asm ("sp");
+	return stack_ptr;
+}
+
+#endif
 
 // Atomic section locker, alternative to InterruptCriticalSectionLocker (is safe to call from within an ISR, and may be faster)
 /**