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, 216 insertions, 0 deletions

diff --git a/atmel-samd/asf4/samd21/hal/include/hal_timer.h b/atmel-samd/asf4/samd21/hal/include/hal_timer.h
new file mode 100644
index 000000000..b5c8f6082
--- /dev/null
+++ b/atmel-samd/asf4/samd21/hal/include/hal_timer.h
@@ -0,0 +1,216 @@
+/**
+ * \file
+ *
+ * \brief Timer task functionality declaration.
+ *
+ * Copyright (C) 2014 - 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
+ *
+ */
+
+#ifndef _HAL_TIMER_H_INCLUDED
+#define _HAL_TIMER_H_INCLUDED
+
+#include <utils_list.h>
+#include <hpl_timer.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \addtogroup doc_driver_hal_timer
+ *
+ * @{
+ */
+
+/**
+ * \brief Timer mode type
+ */
+enum timer_task_mode { TIMER_TASK_ONE_SHOT, TIMER_TASK_REPEAT };
+
+/**
+ * \brief Timer task descriptor
+ *
+ * The timer task descriptor forward declaration.
+ */
+struct timer_task;
+
+/**
+ * \brief Timer task callback function type
+ */
+typedef void (*timer_cb_t)(const struct timer_task *const timer_task);
+
+/**
+ * \brief Timer task structure
+ */
+struct timer_task {
+	struct list_element elem;       /*! List element. */
+	uint32_t            time_label; /*! Absolute timer start time. */
+
+	uint32_t             interval; /*! Number of timer ticks before calling the task. */
+	timer_cb_t           cb;       /*! Function pointer to the task. */
+	enum timer_task_mode mode;     /*! Task mode: one shot or repeat. */
+};
+
+/**
+ * \brief Timer structure
+ */
+struct timer_descriptor {
+	struct _timer_device   device;
+	uint32_t               time;
+	struct list_descriptor tasks; /*! Timer tasks list. */
+	volatile uint8_t       flags;
+};
+
+/**
+ * \brief Initialize timer
+ *
+ * This function initializes the given timer.
+ * It checks if the given hardware is not initialized and if the given hardware
+ * is permitted to be initialized.
+ *
+ * \param[out] descr A timer descriptor to initialize
+ * \param[in] hw The pointer to the hardware instance
+ * \param[in] func The pointer to a set of function pointers
+ *
+ * \return Initialization status.
+ */
+int32_t timer_init(struct timer_descriptor *const descr, void *const hw, struct _timer_hpl_interface *const func);
+
+/**
+ * \brief Deinitialize timer
+ *
+ * This function deinitializes the given timer.
+ * It checks if the given hardware is initialized and if the given hardware is
+ * permitted to be deinitialized.
+ *
+ * \param[in] descr A timer descriptor to deinitialize
+ *
+ * \return De-initialization status.
+ */
+int32_t timer_deinit(struct timer_descriptor *const descr);
+
+/**
+ * \brief Start timer
+ *
+ * This function starts the given timer.
+ * It checks if the given hardware is initialized.
+ *
+ * \param[in] descr The timer descriptor of a timer to start
+ *
+ * \return Timer starting status.
+ */
+int32_t timer_start(struct timer_descriptor *const descr);
+
+/**
+ * \brief Stop timer
+ *
+ * This function stops the given timer.
+ * It checks if the given hardware is initialized.
+ *
+ * \param[in] descr The timer descriptor of a timer to stop
+ *
+ * \return Timer stopping status.
+ */
+int32_t timer_stop(struct timer_descriptor *const descr);
+
+/**
+ * \brief Set amount of clock cycles per timer tick
+ *
+ * This function sets the amount of clock cycles per timer tick for the given timer.
+ * It checks if the given hardware is initialized.
+ *
+ * \param[in] descr The timer descriptor of a timer to stop
+ * \param[in] clock_cycles The amount of clock cycles per tick to set
+ *
+ * \return Setting clock cycles amount status.
+ */
+int32_t timer_set_clock_cycles_per_tick(struct timer_descriptor *const descr, const uint32_t clock_cycles);
+
+/**
+ * \brief Retrieve the amount of clock cycles in a tick
+ *
+ * This function retrieves how many clock cycles there are in a single timer tick.
+ * It checks if the given hardware is initialized.
+ *
+ * \param[in]  descr The timer descriptor of a timer to convert ticks to
+ * clock cycles
+ * \param[out] cycles The amount of clock cycles
+ *
+ * \return The status of clock cycles retrieving.
+ */
+int32_t timer_get_clock_cycles_in_tick(const struct timer_descriptor *const descr, uint32_t *const cycles);
+
+/**
+ * \brief Add timer task
+ *
+ * This function adds the given timer task to the given timer.
+ * It checks if the given hardware is initialized.
+ *
+ * \param[in] descr The timer descriptor of a timer to add task to
+ * \param[in] task A task to add
+ *
+ * \return Timer's task adding status.
+ */
+int32_t timer_add_task(struct timer_descriptor *const descr, struct timer_task *const task);
+
+/**
+ * \brief Remove timer task
+ *
+ * This function removes the given timer task from the given timer.
+ * It checks if the given hardware is initialized.
+ *
+ * \param[in] descr The timer descriptor of a timer to remove task from
+ * \param[in] task A task to remove
+ *
+ * \return Timer's task removing status.
+ */
+int32_t timer_remove_task(struct timer_descriptor *const descr, const struct timer_task *const task);
+
+/**
+ * \brief Retrieve the current driver version
+ *
+ * \return Current driver version.
+ */
+uint32_t timer_get_version(void);
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _HAL_TIMER_H_INCLUDED */