Move to ASF4 and introduce SAMD51 support. (#258)3.0.0-alpha.0

* atmel-samd: Remove ASF3. This will break builds.

* atmel-samd: Add ASF4 for the SAMD21 and SAMD51.

* Introduce the supervisor concept to facilitate porting.

The supervisor is the code which runs individual MicroPython VMs. By
splitting it out we make it more consistent and easier to find.

This also adds very basic SAMD21 and SAMD51 support using the
supervisor. Only the REPL currently works.

This begins the work for #178.

1 files changed, 108 insertions, 0 deletions

diff --git a/atmel-samd/asf4/samd51/hal/src/hal_evsys.c b/atmel-samd/asf4/samd51/hal/src/hal_evsys.c
new file mode 100644
index 000000000..9001d7239
--- /dev/null
+++ b/atmel-samd/asf4/samd51/hal/src/hal_evsys.c
@@ -0,0 +1,108 @@
+/**
+ * \file
+ *
+ * \brief HAL event system related functionality implementation.
+ *
+ * Copyright (C) 2016 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
+ *
+ */
+
+#include "hal_evsys.h"
+#include <hpl_evsys.h>
+
+/**
+ * \brief Driver version
+ */
+#define DRIVER_VERSION 0x00000001u
+
+/**
+ * \brief Initialize event system.
+ */
+int32_t event_system_init(void)
+{
+	return _event_system_init();
+}
+
+/**
+ * \brief Deinitialize event system.
+ */
+int32_t event_system_deinit(void)
+{
+	return _event_system_deinit();
+}
+
+/**
+ * \brief Enable event reception by the given user from the given channel
+ */
+int32_t event_system_enable_user(const uint16_t user, const uint16_t channel)
+{
+	return _event_system_enable_user(user, channel, true);
+}
+
+/**
+ * \brief Enable event reception by the given user from the given channel
+ */
+int32_t event_system_disable_user(const uint16_t user, const uint16_t channel)
+{
+	return _event_system_enable_user(user, channel, false);
+}
+
+/**
+ * \brief Enable event generation by the given generator for the given channel
+ */
+int32_t event_system_enable_generator(const uint16_t generator, const uint16_t channel)
+{
+	return _event_system_enable_generator(generator, channel, true);
+}
+
+/**
+ * \brief Enable event generation by the given generator for the given channel
+ */
+int32_t event_system_disable_generator(const uint16_t generator, const uint16_t channel)
+{
+	return _event_system_enable_generator(generator, channel, false);
+}
+
+/**
+ * \brief Retrieve the current driver version
+ *
+ * \return Current driver version
+ */
+uint32_t event_system_get_version(void)
+{
+	return DRIVER_VERSION;
+}