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Diff: targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/sercom/sercom_interrupt.c
- Revision:
- 613:bc40b8d2aec4
- Parent:
- 612:fba1c7dc54c0
- Child:
- 614:9d86c2ae5de0
--- a/targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/sercom/sercom_interrupt.c Tue Aug 18 15:00:09 2015 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,95 +0,0 @@ -#include "sercom_interrupt.h" - -void *_sercom_instances[SERCOM_INST_NUM]; - -/** Save status of initialized handlers. */ -static bool _handler_table_initialized = false; - -/** Void pointers for saving device instance structures. */ -static void (*_sercom_interrupt_handlers[SERCOM_INST_NUM])(const uint8_t instance); - -/** - * \internal - * Default interrupt handler. - * - * \param[in] instance SERCOM instance used. - */ -static void _sercom_default_handler( - const uint8_t instance) -{ - Assert(false); -} - -/** - * \internal - * Saves the given callback handler. - * - * \param[in] instance Instance index. - * \param[in] interrupt_handler Pointer to instance callback handler. - */ -void _sercom_set_handler( - const uint8_t instance, - const sercom_handler_t interrupt_handler) -{ - /* Initialize handlers with default handler and device instances with 0. */ - if (_handler_table_initialized == false) { - for (uint32_t i = 0; i < SERCOM_INST_NUM; i++) { - _sercom_interrupt_handlers[i] = &_sercom_default_handler; - _sercom_instances[i] = NULL; - } - - _handler_table_initialized = true; - } - - /* Save interrupt handler. */ - _sercom_interrupt_handlers[instance] = interrupt_handler; -} - - -/** \internal - * Converts a given SERCOM index to its interrupt vector index. - */ -#define _SERCOM_INTERRUPT_VECT_NUM(n, unused) \ - SYSTEM_INTERRUPT_MODULE_SERCOM##n, - -/** \internal - * Generates a SERCOM interrupt handler function for a given SERCOM index. - */ -#define _SERCOM_INTERRUPT_HANDLER(n, unused) \ - void SERCOM##n##_Handler(void) \ - { \ - _sercom_interrupt_handlers[n](n); \ - } - -/** - * \internal - * Returns the system interrupt vector. - * - * \param[in] sercom_instance Instance pointer - * - * \return Enum of system interrupt vector - * \retval SYSTEM_INTERRUPT_MODULE_SERCOM0 - * \retval SYSTEM_INTERRUPT_MODULE_SERCOM1 - * \retval SYSTEM_INTERRUPT_MODULE_SERCOM2 - * \retval SYSTEM_INTERRUPT_MODULE_SERCOM3 - * \retval SYSTEM_INTERRUPT_MODULE_SERCOM4 - * \retval SYSTEM_INTERRUPT_MODULE_SERCOM5 - * \retval SYSTEM_INTERRUPT_MODULE_SERCOM6 - * \retval SYSTEM_INTERRUPT_MODULE_SERCOM7 - */ -enum system_interrupt_vector _sercom_get_interrupt_vector( - Sercom *const sercom_instance) -{ - const uint8_t sercom_int_vectors[SERCOM_INST_NUM] = { - MREPEAT(SERCOM_INST_NUM, _SERCOM_INTERRUPT_VECT_NUM, ~) - }; - - /* Retrieve the index of the SERCOM being requested */ - uint8_t instance_index = _sercom_get_sercom_inst_index(sercom_instance); - - /* Get the vector number from the lookup table for the requested SERCOM */ - return (enum system_interrupt_vector)sercom_int_vectors[instance_index]; -} - -/** Auto-generate a set of interrupt handlers for each SERCOM in the device */ -MREPEAT(SERCOM_INST_NUM, _SERCOM_INTERRUPT_HANDLER, ~)