Merge pull request #2913 from kaspar030/hwtimer_compat

sys: add hwtimer compatibility layer for periph timers

cpu/samd21/Makefile.include

@@ -22,7 +22,7 @@ export UNDEF += $(BINDIR)cpu/syscalls.o
 export UNDEF += $(BINDIR)cpu/startup.o
 
 # export the peripheral drivers to be linked into the final binary
-export USEMODULE += periph
+export USEMODULE += periph hwtimer_compat
 
 # CPU depends on the cortex-m common module, so include it
 include $(CORTEX_COMMON)Makefile.include

sys/Makefile

@@ -137,6 +137,9 @@ endif
 ifneq (,$(filter ng_udp,$(USEMODULE)))
     DIRS += net/transport_layer/ng_udp
 endif
+ifneq (,$(filter hwtimer_compat,$(USEMODULE)))
+    DIRS += compat/hwtimer
+endif
 
 DIRS += $(dir $(wildcard $(addsuffix /Makefile, ${USEMODULE})))
 

sys/compat/Makefile

+include $(RIOTBASE)/Makefile.base

sys/compat/hwtimer/Makefile

+MODULE = hwtimer_compat
+
+include $(RIOTBASE)/Makefile.base

cpu/samd21/hwtimer_arch.c → sys/compat/hwtimer/hwtimer_arch.c

 /*
- * Copyright (C) 2014 Freie Universität Berlin
+ * Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
+ *               2014 Freie Universität Berlin
+ *
  *
  * This file is subject to the terms and conditions of the GNU Lesser
  * General Public License v2.1. See the file LICENSE in the top level
@@ -7,15 +9,16 @@
  */
 
 /**
- * @ingroup     cpu_samd21
+ * @ingroup     sys_compat
  * @{
  *
  * @file        hwtimer_arch.c
- * @brief       Implementation of the kernels hwtimer interface
+ * @brief       Implementation of the kernels hwtimer interface over periph timers
  *
- * The hardware timer implementation uses the Cortex build-in system timer as back-end.
+ * This hwtimer implementation wraps one periph timer
  *
  * @author      Thomas Eichinger <thomas.eichinger@fu-berlin.de>
+ * @author      Kaspar Schleiser <kaspar@schleiser.de>
  *
  * @}
  */