init commit of examples

Examples/SPISLAVEDMA/SPISLAVEDMA(3)/hal/utils/src/utils_assert.c

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+/**
+ * \file
+ *
+ * \brief Asserts related functionality.
+ *
+ * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include <utils_assert.h>
+
+/**
+ * \brief Assert function
+ */
+void assert(const bool condition, const char *const file, const int line)
+{
+	if (!(condition)) {
+		__asm("BKPT #0");
+	}
+	(void)file;
+	(void)line;
+}

Examples/SPISLAVEDMA/SPISLAVEDMA(3)/hal/utils/src/utils_event.c

@@ -0,0 +1,125 @@
+/**
+ * \file
+ *
+ * \brief Events implementation.
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include <utils_event.h>
+#include <utils_assert.h>
+#include <string.h>
+
+#define EVENT_WORD_BITS (sizeof(event_word_t) * 8)
+
+static struct list_descriptor events;
+static uint8_t                subscribed[EVENT_MASK_SIZE];
+
+int32_t event_subscribe(struct event *const event, const event_id_t id, event_cb_t cb)
+{
+	/* get byte and bit number of the given event in the event mask */
+	const uint8_t position = id >> 3;
+	const uint8_t mask     = 1 << (id & 0x7);
+
+	ASSERT(event && cb && (id < EVENT_MAX_AMOUNT));
+
+	if (event->mask[position] & mask) {
+		return ERR_NO_CHANGE; /* Already subscribed */
+	}
+
+	if (!is_list_element(&events, event)) {
+		memset(event->mask, 0, EVENT_MASK_SIZE);
+		list_insert_as_head(&events, event);
+	}
+	event->cb = cb;
+	event->mask[position] |= mask;
+
+	subscribed[position] |= mask;
+
+	return ERR_NONE;
+}
+
+int32_t event_unsubscribe(struct event *const event, const event_id_t id)
+{
+	/* get byte and bit number of the given event in the event mask */
+	const uint8_t       position = id >> 3;
+	const uint8_t       mask     = 1 << (id & 0x7);
+	const struct event *current;
+	uint8_t             i;
+
+	ASSERT(event && (id < EVENT_MAX_AMOUNT));
+
+	if (!(event->mask[position] & mask)) {
+		return ERR_NO_CHANGE; /* Already unsubscribed */
+	}
+
+	event->mask[position] &= ~mask;
+
+	/* Check if there are more subscribers */
+	for ((current = (const struct event *)list_get_head(&events)); current;
+	     current = (const struct event *)list_get_next_element(current)) {
+		if (current->mask[position] & mask) {
+			break;
+		}
+	}
+	if (!current) {
+		subscribed[position] &= ~mask;
+	}
+
+	/* Remove event from the list. Can be unsave, document it! */
+	for (i = 0; i < ARRAY_SIZE(event->mask); i++) {
+		if (event->mask[i]) {
+			return ERR_NONE;
+		}
+	}
+	list_delete_element(&events, event);
+
+	return ERR_NONE;
+}
+
+void event_post(const event_id_t id, const event_data_t data)
+{
+	/* get byte and bit number of the given event in the event mask */
+	const uint8_t       position = id >> 3;
+	const uint8_t       mask     = 1 << (id & 0x7);
+	const struct event *current;
+
+	ASSERT((id < EVENT_MAX_AMOUNT));
+
+	if (!(subscribed[position] & mask)) {
+		return; /* No subscribers */
+	}
+
+	/* Find all subscribers */
+	for ((current = (const struct event *)list_get_head(&events)); current;
+	     current = (const struct event *)list_get_next_element(current)) {
+		if (current->mask[position] & mask) {
+			current->cb(id, data);
+		}
+	}
+}

Examples/SPISLAVEDMA/SPISLAVEDMA(3)/hal/utils/src/utils_list.c

@@ -0,0 +1,136 @@
+/**
+ * \file
+ *
+ * \brief List functionality implementation.
+ *
+ * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include <utils_list.h>
+#include <utils_assert.h>
+
+/**
+ * \brief Check whether element belongs to list
+ */
+bool is_list_element(const struct list_descriptor *const list, const void *const element)
+{
+	struct list_element *it;
+	for (it = list->head; it; it = it->next) {
+		if (it == element) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+/**
+ * \brief Insert an element as list head
+ */
+void list_insert_as_head(struct list_descriptor *const list, void *const element)
+{
+	ASSERT(!is_list_element(list, element));
+
+	((struct list_element *)element)->next = list->head;
+	list->head                             = (struct list_element *)element;
+}
+
+/**
+ * \brief Insert an element after the given list element
+ */
+void list_insert_after(void *const after, void *const element)
+{
+	((struct list_element *)element)->next = ((struct list_element *)after)->next;
+	((struct list_element *)after)->next   = (struct list_element *)element;
+}
+
+/**
+ * \brief Insert an element at list end
+ */
+void list_insert_at_end(struct list_descriptor *const list, void *const element)
+{
+	struct list_element *it = list->head;
+
+	ASSERT(!is_list_element(list, element));
+
+	if (!list->head) {
+		list->head                             = (struct list_element *)element;
+		((struct list_element *)element)->next = NULL;
+		return;
+	}
+
+	while (it->next) {
+		it = it->next;
+	}
+	it->next                               = (struct list_element *)element;
+	((struct list_element *)element)->next = NULL;
+}
+
+/**
+ * \brief Removes list head
+ */
+void *list_remove_head(struct list_descriptor *const list)
+{
+	if (list->head) {
+		struct list_element *tmp = list->head;
+
+		list->head = list->head->next;
+		return (void *)tmp;
+	}
+
+	return NULL;
+}
+
+/**
+ * \brief Removes list element
+ */
+bool list_delete_element(struct list_descriptor *const list, const void *const element)
+{
+	if (!element) {
+		return false;
+	}
+
+	if (list->head == element) {
+		list->head = list->head->next;
+		return true;
+	} else {
+		struct list_element *it = list->head;
+
+		while (it && it->next != element) {
+			it = it->next;
+		}
+		if (it) {
+			it->next = ((struct list_element *)element)->next;
+			return true;
+		}
+	}
+
+	return false;
+}
+
+//@}

Examples/SPISLAVEDMA/SPISLAVEDMA(3)/hal/utils/src/utils_syscalls.c

@@ -0,0 +1,152 @@
+/**
+ * \file
+ *
+ * \brief Syscalls for SAM0 (GCC).
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#undef errno
+extern int errno;
+extern int _end;
+
+extern caddr_t _sbrk(int incr);
+extern int     link(char *old, char *_new);
+extern int     _close(int file);
+extern int     _fstat(int file, struct stat *st);
+extern int     _isatty(int file);
+extern int     _lseek(int file, int ptr, int dir);
+extern void    _exit(int status);
+extern void    _kill(int pid, int sig);
+extern int     _getpid(void);
+
+/**
+ * \brief Replacement of C library of _sbrk
+ */
+extern caddr_t _sbrk(int incr)
+{
+	static unsigned char *heap = NULL;
+	unsigned char *       prev_heap;
+
+	if (heap == NULL) {
+		heap = (unsigned char *)&_end;
+	}
+	prev_heap = heap;
+
+	heap += incr;
+
+	return (caddr_t)prev_heap;
+}
+
+/**
+ * \brief Replacement of C library of link
+ */
+extern int link(char *old, char *_new)
+{
+	(void)old, (void)_new;
+	return -1;
+}
+
+/**
+ * \brief Replacement of C library of _close
+ */
+extern int _close(int file)
+{
+	(void)file;
+	return -1;
+}
+
+/**
+ * \brief Replacement of C library of _fstat
+ */
+extern int _fstat(int file, struct stat *st)
+{
+	(void)file;
+	st->st_mode = S_IFCHR;
+
+	return 0;
+}
+
+/**
+ * \brief Replacement of C library of _isatty
+ */
+extern int _isatty(int file)
+{
+	(void)file;
+	return 1;
+}
+
+/**
+ * \brief Replacement of C library of _lseek
+ */
+extern int _lseek(int file, int ptr, int dir)
+{
+	(void)file, (void)ptr, (void)dir;
+	return 0;
+}
+
+/**
+ * \brief Replacement of C library of _exit
+ */
+extern void _exit(int status)
+{
+	printf("Exiting with status %d.\n", status);
+
+	for (;;)
+		;
+}
+
+/**
+ * \brief Replacement of C library of _kill
+ */
+extern void _kill(int pid, int sig)
+{
+	(void)pid, (void)sig;
+	return;
+}
+
+/**
+ * \brief Replacement of C library of _getpid
+ */
+extern int _getpid(void)
+{
+	return -1;
+}
+
+#ifdef __cplusplus
+}
+#endif