marcus chiou / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/sercom/sercom_interrupt.c@592:a274ee790e56, 2015-07-17 (annotated)

Committer:
mbed_official
Date:
Fri Jul 17 09:15:10 2015 +0100
Revision:
592:a274ee790e56
Parent:
579:53297373a894 
Synchronized with git revision e7144f83a8d75df80c4877936b6ffe552b0be9e6



Full URL: https://github.com/mbedmicro/mbed/commit/e7144f83a8d75df80c4877936b6ffe552b0be9e6/



More API implementation for SAMR21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 579:53297373a894 1 #include "sercom_interrupt.h"
mbed_official 579:53297373a894 2
mbed_official 579:53297373a894 3 void *_sercom_instances[SERCOM_INST_NUM];
mbed_official 579:53297373a894 4
mbed_official 579:53297373a894 5 /** Save status of initialized handlers. */
mbed_official 579:53297373a894 6 static bool _handler_table_initialized = false;
mbed_official 579:53297373a894 7
mbed_official 579:53297373a894 8 /** Void pointers for saving device instance structures. */
mbed_official 579:53297373a894 9 static void (*_sercom_interrupt_handlers[SERCOM_INST_NUM])(const uint8_t instance);
mbed_official 579:53297373a894 10
mbed_official 579:53297373a894 11 /**
mbed_official 579:53297373a894 12 * \internal
mbed_official 579:53297373a894 13 * Default interrupt handler.
mbed_official 579:53297373a894 14 *
mbed_official 579:53297373a894 15 * \param[in] instance SERCOM instance used.
mbed_official 579:53297373a894 16 */
mbed_official 579:53297373a894 17 static void _sercom_default_handler(
mbed_official 579:53297373a894 18 const uint8_t instance)
mbed_official 579:53297373a894 19 {
mbed_official 579:53297373a894 20 Assert(false);
mbed_official 579:53297373a894 21 }
mbed_official 579:53297373a894 22
mbed_official 579:53297373a894 23 /**
mbed_official 579:53297373a894 24 * \internal
mbed_official 579:53297373a894 25 * Saves the given callback handler.
mbed_official 579:53297373a894 26 *
mbed_official 579:53297373a894 27 * \param[in] instance Instance index.
mbed_official 579:53297373a894 28 * \param[in] interrupt_handler Pointer to instance callback handler.
mbed_official 579:53297373a894 29 */
mbed_official 579:53297373a894 30 void _sercom_set_handler(
mbed_official 579:53297373a894 31 const uint8_t instance,
mbed_official 579:53297373a894 32 const sercom_handler_t interrupt_handler)
mbed_official 579:53297373a894 33 {
mbed_official 579:53297373a894 34 /* Initialize handlers with default handler and device instances with 0. */
mbed_official 579:53297373a894 35 if (_handler_table_initialized == false) {
mbed_official 579:53297373a894 36 for (uint32_t i = 0; i < SERCOM_INST_NUM; i++) {
mbed_official 579:53297373a894 37 _sercom_interrupt_handlers[i] = &_sercom_default_handler;
mbed_official 579:53297373a894 38 _sercom_instances[i] = NULL;
mbed_official 579:53297373a894 39 }
mbed_official 579:53297373a894 40
mbed_official 579:53297373a894 41 _handler_table_initialized = true;
mbed_official 579:53297373a894 42 }
mbed_official 579:53297373a894 43
mbed_official 579:53297373a894 44 /* Save interrupt handler. */
mbed_official 579:53297373a894 45 _sercom_interrupt_handlers[instance] = interrupt_handler;
mbed_official 579:53297373a894 46 }
mbed_official 579:53297373a894 47
mbed_official 579:53297373a894 48
mbed_official 579:53297373a894 49 /** \internal
mbed_official 579:53297373a894 50 * Converts a given SERCOM index to its interrupt vector index.
mbed_official 579:53297373a894 51 */
mbed_official 579:53297373a894 52 #define _SERCOM_INTERRUPT_VECT_NUM(n, unused) \
mbed_official 579:53297373a894 53 SYSTEM_INTERRUPT_MODULE_SERCOM##n,
mbed_official 579:53297373a894 54
mbed_official 579:53297373a894 55 /** \internal
mbed_official 579:53297373a894 56 * Generates a SERCOM interrupt handler function for a given SERCOM index.
mbed_official 579:53297373a894 57 */
mbed_official 579:53297373a894 58 #define _SERCOM_INTERRUPT_HANDLER(n, unused) \
mbed_official 579:53297373a894 59 void SERCOM##n##_Handler(void) \
mbed_official 579:53297373a894 60 { \
mbed_official 579:53297373a894 61 _sercom_interrupt_handlers[n](n); \
mbed_official 579:53297373a894 62 }
mbed_official 579:53297373a894 63
mbed_official 579:53297373a894 64 /**
mbed_official 579:53297373a894 65 * \internal
mbed_official 579:53297373a894 66 * Returns the system interrupt vector.
mbed_official 579:53297373a894 67 *
mbed_official 579:53297373a894 68 * \param[in] sercom_instance Instance pointer
mbed_official 579:53297373a894 69 *
mbed_official 579:53297373a894 70 * \return Enum of system interrupt vector
mbed_official 579:53297373a894 71 * \retval SYSTEM_INTERRUPT_MODULE_SERCOM0
mbed_official 579:53297373a894 72 * \retval SYSTEM_INTERRUPT_MODULE_SERCOM1
mbed_official 579:53297373a894 73 * \retval SYSTEM_INTERRUPT_MODULE_SERCOM2
mbed_official 579:53297373a894 74 * \retval SYSTEM_INTERRUPT_MODULE_SERCOM3
mbed_official 579:53297373a894 75 * \retval SYSTEM_INTERRUPT_MODULE_SERCOM4
mbed_official 579:53297373a894 76 * \retval SYSTEM_INTERRUPT_MODULE_SERCOM5
mbed_official 579:53297373a894 77 * \retval SYSTEM_INTERRUPT_MODULE_SERCOM6
mbed_official 579:53297373a894 78 * \retval SYSTEM_INTERRUPT_MODULE_SERCOM7
mbed_official 579:53297373a894 79 */
mbed_official 579:53297373a894 80 enum system_interrupt_vector _sercom_get_interrupt_vector(
mbed_official 579:53297373a894 81 Sercom *const sercom_instance)
mbed_official 579:53297373a894 82 {
mbed_official 579:53297373a894 83 const uint8_t sercom_int_vectors[SERCOM_INST_NUM] = {
mbed_official 579:53297373a894 84 MREPEAT(SERCOM_INST_NUM, _SERCOM_INTERRUPT_VECT_NUM, ~)
mbed_official 579:53297373a894 85 };
mbed_official 579:53297373a894 86
mbed_official 579:53297373a894 87 /* Retrieve the index of the SERCOM being requested */
mbed_official 579:53297373a894 88 uint8_t instance_index = _sercom_get_sercom_inst_index(sercom_instance);
mbed_official 579:53297373a894 89
mbed_official 579:53297373a894 90 /* Get the vector number from the lookup table for the requested SERCOM */
mbed_official 579:53297373a894 91 return (enum system_interrupt_vector)sercom_int_vectors[instance_index];
mbed_official 579:53297373a894 92 }
mbed_official 579:53297373a894 93
mbed_official 579:53297373a894 94 /** Auto-generate a set of interrupt handlers for each SERCOM in the device */
mbed_official 579:53297373a894 95 MREPEAT(SERCOM_INST_NUM, _SERCOM_INTERRUPT_HANDLER, ~)