Re: [avr-libc-dev] [RFC] empty interrupts

[E. Weddington]

On 8 May 2003 at 9:59, Joerg Wunsch wrote:

> > Any objections to adding this to avr/signal.h?
> 
> None from me, provided it gets a paragraph of doxygenation as well.

Attached is proposed patch. Comments?

Eric

Index: signal.h
===================================================================
RCS file: /cvsroot/avr-libc/avr-libc/include/avr/signal.h,v
retrieving revision 1.4
diff -u -r1.4 signal.h
--- signal.h    12 Dec 2002 11:41:01 -0000      1.4
+++ signal.h    8 May 2003 16:24:21 -0000
@@ -70,6 +70,30 @@
 void signame (void)
 #endif
 
+/** \def EMPTY_INTERRUPT(signame) 
+    \ingroup avr_interrupts
+
+    \code#include <avr/signal.h>\endcode
+
+    Defines an empty interrupt handler function. This will not generate
+    any prolog or epilog code and will only return from the ISR. Do not
+    define a function body as this will define it for you.
+    Example:
+    \codeEMPTY_INTERRUPT(SIG_ADC);\endcode */
+
+#ifdef __cplusplus
+#define EMPTY_INTERRUPT(signame)                \
+extern "C" void signame(void);                  \
+void signame (void) __attribute__ ((naked));    \
+void signame (void) {  __asm__ __volatile__ ("reti" ::); }
+#else
+#define EMPTY_INTERRUPT(signame)                \
+void signame (void) __attribute__ ((naked));    \
+void signame (void) { __asm__ __volatile__ ("reti" ::); }
+#endif
+
+
+
 /address@hidden/
 
 #endif /* _AVR_SIGNAL_H_ */