altos: Allow for other mutex implementations

[fw/altos] / src / core / ao.h

diff --git a/src/core/ao.h b/src/core/ao.h
index 711b3533069ef7127ee49cd0601bb602a94d9945..200d4bc49797296810e9a66c67cc07e502f043ec 100644 (file)
--- a/src/core/ao.h
+++ b/src/core/ao.h
@@ -85,7 +85,9 @@ ao_panic(uint8_t reason);
 extern volatile __data AO_TICK_TYPE ao_tick_count;
 
 /* Our timer runs at 100Hz */
+#ifndef AO_HERTZ
 #define AO_HERTZ               100
+#endif
 #define AO_MS_TO_TICKS(ms)     ((ms) / (1000 / AO_HERTZ))
 #define AO_SEC_TO_TICKS(s)     ((s) * AO_HERTZ)
 
@@ -117,11 +119,13 @@ ao_clock_init(void);
  * ao_mutex.c
  */
 
+#ifndef ao_mutex_get
 void
 ao_mutex_get(__xdata uint8_t *ao_mutex) __reentrant;
 
 void
 ao_mutex_put(__xdata uint8_t *ao_mutex) __reentrant;
+#endif
 
 /*
  * ao_cmd.c