Diff: targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/system/system.c

Revision:

579:53297373a894

Child:

592:a274ee790e56

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/system/system.c	Wed Jul 01 09:45:11 2015 +0100
@@ -0,0 +1,105 @@
+/**
+ * \file
+ *
+ * \brief SAM System related functionality
+ *
+ * Copyright (C) 2012-2014 Atmel Corporation. All rights reserved.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. The name of Atmel may not be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an
+ *    Atmel microcontroller product.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * \asf_license_stop
+ *
+ */
+/**
+* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
+*/
+
+#include <system.h>
+
+/**
+ * \internal
+ * Dummy initialization function, used as a weak alias target for the various
+ * init functions called by \ref system_init().
+ */
+void _system_dummy_init(void);
+void _system_dummy_init(void)
+{
+    return;
+}
+
+#if !defined(__DOXYGEN__)
+#  if defined(__GNUC__)
+void system_clock_init(void) WEAK __attribute__((alias("_system_dummy_init")));
+void system_board_init(void) WEAK __attribute__((alias("_system_dummy_init")));
+void _system_events_init(void) WEAK __attribute__((alias("_system_dummy_init")));
+void _system_extint_init(void) WEAK __attribute__((alias("_system_dummy_init")));
+#  elif defined(__ICCARM__)
+void system_clock_init(void);
+void system_board_init(void);
+void _system_events_init(void);
+void _system_extint_init(void);
+#    pragma weak system_clock_init=_system_dummy_init
+#    pragma weak system_board_init=_system_dummy_init
+#    pragma weak _system_events_init=_system_dummy_init
+#    pragma weak _system_extint_init=_system_dummy_init
+#  endif
+#endif
+
+/**
+ * \brief Initialize system.
+ *
+ * This function will call the various initialization functions within the
+ * system namespace. If a given optional system module is not available, the
+ * associated call will effectively be a NOP (No Operation).
+ *
+ * Currently the following initialization functions are supported:
+ *  - System clock initialization (via the SYSTEM CLOCK sub-module)
+ *  - Board hardware initialization (via the Board module)
+ *  - Event system driver initialization (via the EVSYS module)
+ *  - External Interrupt driver initialization (via the EXTINT module)
+ */
+void system_init(void)
+{
+    /* Configure GCLK and clock sources according to conf_clocks.h */
+    system_clock_init();
+
+    /* Initialize board hardware */
+    system_board_init();
+
+    /* Initialize EVSYS hardware */
+    _system_events_init();
+
+    /* Initialize External hardware */
+    _system_extint_init();
+}
+