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targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/drivers/tc/tc_interrupt.c@15:a81a8d6c1dfe, 2015-11-04 (annotated)

Committer:
mbed_official
Date:
Wed Nov 04 16:30:11 2015 +0000
Revision:
15:a81a8d6c1dfe
Synchronized with git revision 46af745ef4405614c3fa49abbd9a706a362ea514



Full URL: https://github.com/mbedmicro/mbed/commit/46af745ef4405614c3fa49abbd9a706a362ea514/



Renamed TARGET_SAM_CortexM0+ to TARGET_SAM_CortexM0P for compatiblity with online compiler

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 15:a81a8d6c1dfe 1 /**
mbed_official 15:a81a8d6c1dfe 2 * \file
mbed_official 15:a81a8d6c1dfe 3 *
mbed_official 15:a81a8d6c1dfe 4 * \brief SAM TC - Timer Counter Callback Driver
mbed_official 15:a81a8d6c1dfe 5 *
mbed_official 15:a81a8d6c1dfe 6 * Copyright (C) 2013-2015 Atmel Corporation. All rights reserved.
mbed_official 15:a81a8d6c1dfe 7 *
mbed_official 15:a81a8d6c1dfe 8 * \asf_license_start
mbed_official 15:a81a8d6c1dfe 9 *
mbed_official 15:a81a8d6c1dfe 10 * \page License
mbed_official 15:a81a8d6c1dfe 11 *
mbed_official 15:a81a8d6c1dfe 12 * Redistribution and use in source and binary forms, with or without
mbed_official 15:a81a8d6c1dfe 13 * modification, are permitted provided that the following conditions are met:
mbed_official 15:a81a8d6c1dfe 14 *
mbed_official 15:a81a8d6c1dfe 15 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 15:a81a8d6c1dfe 16 * this list of conditions and the following disclaimer.
mbed_official 15:a81a8d6c1dfe 17 *
mbed_official 15:a81a8d6c1dfe 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 15:a81a8d6c1dfe 19 * this list of conditions and the following disclaimer in the documentation
mbed_official 15:a81a8d6c1dfe 20 * and/or other materials provided with the distribution.
mbed_official 15:a81a8d6c1dfe 21 *
mbed_official 15:a81a8d6c1dfe 22 * 3. The name of Atmel may not be used to endorse or promote products derived
mbed_official 15:a81a8d6c1dfe 23 * from this software without specific prior written permission.
mbed_official 15:a81a8d6c1dfe 24 *
mbed_official 15:a81a8d6c1dfe 25 * 4. This software may only be redistributed and used in connection with an
mbed_official 15:a81a8d6c1dfe 26 * Atmel microcontroller product.
mbed_official 15:a81a8d6c1dfe 27 *
mbed_official 15:a81a8d6c1dfe 28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
mbed_official 15:a81a8d6c1dfe 29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 15:a81a8d6c1dfe 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
mbed_official 15:a81a8d6c1dfe 31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
mbed_official 15:a81a8d6c1dfe 32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 15:a81a8d6c1dfe 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
mbed_official 15:a81a8d6c1dfe 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
mbed_official 15:a81a8d6c1dfe 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
mbed_official 15:a81a8d6c1dfe 36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
mbed_official 15:a81a8d6c1dfe 37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 15:a81a8d6c1dfe 38 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 15:a81a8d6c1dfe 39 *
mbed_official 15:a81a8d6c1dfe 40 * \asf_license_stop
mbed_official 15:a81a8d6c1dfe 41 *
mbed_official 15:a81a8d6c1dfe 42 */
mbed_official 15:a81a8d6c1dfe 43
mbed_official 15:a81a8d6c1dfe 44 /*
mbed_official 15:a81a8d6c1dfe 45 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
mbed_official 15:a81a8d6c1dfe 46 */
mbed_official 15:a81a8d6c1dfe 47
mbed_official 15:a81a8d6c1dfe 48 #include "tc_interrupt.h"
mbed_official 15:a81a8d6c1dfe 49
mbed_official 15:a81a8d6c1dfe 50 void *_tc_instances[TC_INST_NUM];
mbed_official 15:a81a8d6c1dfe 51
mbed_official 15:a81a8d6c1dfe 52 void _tc_interrupt_handler(uint8_t instance);
mbed_official 15:a81a8d6c1dfe 53
mbed_official 15:a81a8d6c1dfe 54 /**
mbed_official 15:a81a8d6c1dfe 55 * \brief Registers a callback.
mbed_official 15:a81a8d6c1dfe 56 *
mbed_official 15:a81a8d6c1dfe 57 * Registers a callback function which is implemented by the user.
mbed_official 15:a81a8d6c1dfe 58 *
mbed_official 15:a81a8d6c1dfe 59 * \note The callback must be enabled by \ref tc_enable_callback,
mbed_official 15:a81a8d6c1dfe 60 * in order for the interrupt handler to call it when the conditions for the
mbed_official 15:a81a8d6c1dfe 61 * callback type is met.
mbed_official 15:a81a8d6c1dfe 62 *
mbed_official 15:a81a8d6c1dfe 63 * \param[in] module Pointer to TC software instance struct
mbed_official 15:a81a8d6c1dfe 64 * \param[in] callback_func Pointer to callback function
mbed_official 15:a81a8d6c1dfe 65 * \param[in] callback_type Callback type given by an enum
mbed_official 15:a81a8d6c1dfe 66 */
mbed_official 15:a81a8d6c1dfe 67 enum status_code tc_register_callback(
mbed_official 15:a81a8d6c1dfe 68 struct tc_module *const module,
mbed_official 15:a81a8d6c1dfe 69 tc_callback_t callback_func,
mbed_official 15:a81a8d6c1dfe 70 const enum tc_callback callback_type)
mbed_official 15:a81a8d6c1dfe 71 {
mbed_official 15:a81a8d6c1dfe 72 /* Sanity check arguments */
mbed_official 15:a81a8d6c1dfe 73 Assert(module);
mbed_official 15:a81a8d6c1dfe 74 Assert(callback_func);
mbed_official 15:a81a8d6c1dfe 75
mbed_official 15:a81a8d6c1dfe 76 /* Register callback function */
mbed_official 15:a81a8d6c1dfe 77 module->callback[callback_type] = callback_func;
mbed_official 15:a81a8d6c1dfe 78
mbed_official 15:a81a8d6c1dfe 79 /* Set the bit corresponding to the callback_type */
mbed_official 15:a81a8d6c1dfe 80 if (callback_type == TC_CALLBACK_CC_CHANNEL0) {
mbed_official 15:a81a8d6c1dfe 81 module->register_callback_mask |= TC_INTFLAG_MC(1);
mbed_official 15:a81a8d6c1dfe 82 } else if (callback_type == TC_CALLBACK_CC_CHANNEL1) {
mbed_official 15:a81a8d6c1dfe 83 module->register_callback_mask |= TC_INTFLAG_MC(2);
mbed_official 15:a81a8d6c1dfe 84 } else {
mbed_official 15:a81a8d6c1dfe 85 module->register_callback_mask |= (1 << callback_type);
mbed_official 15:a81a8d6c1dfe 86 }
mbed_official 15:a81a8d6c1dfe 87 return STATUS_OK;
mbed_official 15:a81a8d6c1dfe 88 }
mbed_official 15:a81a8d6c1dfe 89
mbed_official 15:a81a8d6c1dfe 90 /**
mbed_official 15:a81a8d6c1dfe 91 * \brief Unregisters a callback.
mbed_official 15:a81a8d6c1dfe 92 *
mbed_official 15:a81a8d6c1dfe 93 * Unregisters a callback function implemented by the user. The callback should be
mbed_official 15:a81a8d6c1dfe 94 * disabled before it is unregistered.
mbed_official 15:a81a8d6c1dfe 95 *
mbed_official 15:a81a8d6c1dfe 96 * \param[in] module Pointer to TC software instance struct
mbed_official 15:a81a8d6c1dfe 97 * \param[in] callback_type Callback type given by an enum
mbed_official 15:a81a8d6c1dfe 98 */
mbed_official 15:a81a8d6c1dfe 99 enum status_code tc_unregister_callback(
mbed_official 15:a81a8d6c1dfe 100 struct tc_module *const module,
mbed_official 15:a81a8d6c1dfe 101 const enum tc_callback callback_type)
mbed_official 15:a81a8d6c1dfe 102 {
mbed_official 15:a81a8d6c1dfe 103 /* Sanity check arguments */
mbed_official 15:a81a8d6c1dfe 104 Assert(module);
mbed_official 15:a81a8d6c1dfe 105
mbed_official 15:a81a8d6c1dfe 106 /* Unregister callback function */
mbed_official 15:a81a8d6c1dfe 107 module->callback[callback_type] = NULL;
mbed_official 15:a81a8d6c1dfe 108
mbed_official 15:a81a8d6c1dfe 109 /* Clear the bit corresponding to the callback_type */
mbed_official 15:a81a8d6c1dfe 110 if (callback_type == TC_CALLBACK_CC_CHANNEL0) {
mbed_official 15:a81a8d6c1dfe 111 module->register_callback_mask &= ~TC_INTFLAG_MC(1);
mbed_official 15:a81a8d6c1dfe 112 } else if (callback_type == TC_CALLBACK_CC_CHANNEL1) {
mbed_official 15:a81a8d6c1dfe 113 module->register_callback_mask &= ~TC_INTFLAG_MC(2);
mbed_official 15:a81a8d6c1dfe 114 } else {
mbed_official 15:a81a8d6c1dfe 115 module->register_callback_mask &= ~(1 << callback_type);
mbed_official 15:a81a8d6c1dfe 116 }
mbed_official 15:a81a8d6c1dfe 117 return STATUS_OK;
mbed_official 15:a81a8d6c1dfe 118 }
mbed_official 15:a81a8d6c1dfe 119
mbed_official 15:a81a8d6c1dfe 120 /**
mbed_official 15:a81a8d6c1dfe 121 * \internal ISR handler for TC
mbed_official 15:a81a8d6c1dfe 122 *
mbed_official 15:a81a8d6c1dfe 123 * Auto-generate a set of interrupt handlers for each TC in the device.
mbed_official 15:a81a8d6c1dfe 124 */
mbed_official 15:a81a8d6c1dfe 125 #define _TC_INTERRUPT_HANDLER(n, m) \
mbed_official 15:a81a8d6c1dfe 126 void TC##n##_Handler(void) \
mbed_official 15:a81a8d6c1dfe 127 { \
mbed_official 15:a81a8d6c1dfe 128 _tc_interrupt_handler(m); \
mbed_official 15:a81a8d6c1dfe 129 }
mbed_official 15:a81a8d6c1dfe 130
mbed_official 15:a81a8d6c1dfe 131 #if (SAML21E) || (SAML21G)
mbed_official 15:a81a8d6c1dfe 132 _TC_INTERRUPT_HANDLER(0,0)
mbed_official 15:a81a8d6c1dfe 133 _TC_INTERRUPT_HANDLER(1,1)
mbed_official 15:a81a8d6c1dfe 134 _TC_INTERRUPT_HANDLER(4,2)
mbed_official 15:a81a8d6c1dfe 135 #else
mbed_official 15:a81a8d6c1dfe 136 MRECURSION(TC_INST_NUM, _TC_INTERRUPT_HANDLER, TC_INST_MAX_ID)
mbed_official 15:a81a8d6c1dfe 137 #endif
mbed_official 15:a81a8d6c1dfe 138
mbed_official 15:a81a8d6c1dfe 139
mbed_official 15:a81a8d6c1dfe 140 /**
mbed_official 15:a81a8d6c1dfe 141 * \internal Interrupt Handler for TC module
mbed_official 15:a81a8d6c1dfe 142 *
mbed_official 15:a81a8d6c1dfe 143 * Handles interrupts as they occur, it will run the callback functions
mbed_official 15:a81a8d6c1dfe 144 * that are registered and enabled.
mbed_official 15:a81a8d6c1dfe 145 *
mbed_official 15:a81a8d6c1dfe 146 * \param[in] instance ID of the TC instance calling the interrupt
mbed_official 15:a81a8d6c1dfe 147 * handler.
mbed_official 15:a81a8d6c1dfe 148 */
mbed_official 15:a81a8d6c1dfe 149 void _tc_interrupt_handler(
mbed_official 15:a81a8d6c1dfe 150 uint8_t instance)
mbed_official 15:a81a8d6c1dfe 151 {
mbed_official 15:a81a8d6c1dfe 152 /* Temporary variable */
mbed_official 15:a81a8d6c1dfe 153 uint8_t interrupt_and_callback_status_mask;
mbed_official 15:a81a8d6c1dfe 154
mbed_official 15:a81a8d6c1dfe 155 /* Get device instance from the look-up table */
mbed_official 15:a81a8d6c1dfe 156 struct tc_module *module
mbed_official 15:a81a8d6c1dfe 157 = (struct tc_module *)_tc_instances[instance];
mbed_official 15:a81a8d6c1dfe 158
mbed_official 15:a81a8d6c1dfe 159 /* Read and mask interrupt flag register */
mbed_official 15:a81a8d6c1dfe 160 interrupt_and_callback_status_mask = module->hw->COUNT8.INTFLAG.reg &
mbed_official 15:a81a8d6c1dfe 161 module->register_callback_mask &
mbed_official 15:a81a8d6c1dfe 162 module->enable_callback_mask;
mbed_official 15:a81a8d6c1dfe 163
mbed_official 15:a81a8d6c1dfe 164 /* Check if an Overflow interrupt has occurred */
mbed_official 15:a81a8d6c1dfe 165 if (interrupt_and_callback_status_mask & TC_INTFLAG_OVF) {
mbed_official 15:a81a8d6c1dfe 166 /* Invoke registered and enabled callback function */
mbed_official 15:a81a8d6c1dfe 167 (module->callback[TC_CALLBACK_OVERFLOW])(module);
mbed_official 15:a81a8d6c1dfe 168 /* Clear interrupt flag */
mbed_official 15:a81a8d6c1dfe 169 module->hw->COUNT8.INTFLAG.reg = TC_INTFLAG_OVF;
mbed_official 15:a81a8d6c1dfe 170 }
mbed_official 15:a81a8d6c1dfe 171
mbed_official 15:a81a8d6c1dfe 172 /* Check if an Error interrupt has occurred */
mbed_official 15:a81a8d6c1dfe 173 if (interrupt_and_callback_status_mask & TC_INTFLAG_ERR) {
mbed_official 15:a81a8d6c1dfe 174 /* Invoke registered and enabled callback function */
mbed_official 15:a81a8d6c1dfe 175 (module->callback[TC_CALLBACK_ERROR])(module);
mbed_official 15:a81a8d6c1dfe 176 /* Clear interrupt flag */
mbed_official 15:a81a8d6c1dfe 177 module->hw->COUNT8.INTFLAG.reg = TC_INTFLAG_ERR;
mbed_official 15:a81a8d6c1dfe 178 }
mbed_official 15:a81a8d6c1dfe 179
mbed_official 15:a81a8d6c1dfe 180 /* Check if an Match/Capture Channel 0 interrupt has occurred */
mbed_official 15:a81a8d6c1dfe 181 if (interrupt_and_callback_status_mask & TC_INTFLAG_MC(1)) {
mbed_official 15:a81a8d6c1dfe 182 /* Invoke registered and enabled callback function */
mbed_official 15:a81a8d6c1dfe 183 (module->callback[TC_CALLBACK_CC_CHANNEL0])(module);
mbed_official 15:a81a8d6c1dfe 184 /* Clear interrupt flag */
mbed_official 15:a81a8d6c1dfe 185 module->hw->COUNT8.INTFLAG.reg = TC_INTFLAG_MC(1);
mbed_official 15:a81a8d6c1dfe 186 }
mbed_official 15:a81a8d6c1dfe 187
mbed_official 15:a81a8d6c1dfe 188 /* Check if an Match/Capture Channel 1 interrupt has occurred */
mbed_official 15:a81a8d6c1dfe 189 if (interrupt_and_callback_status_mask & TC_INTFLAG_MC(2)) {
mbed_official 15:a81a8d6c1dfe 190 /* Invoke registered and enabled callback function */
mbed_official 15:a81a8d6c1dfe 191 (module->callback[TC_CALLBACK_CC_CHANNEL1])(module);
mbed_official 15:a81a8d6c1dfe 192 /* Clear interrupt flag */
mbed_official 15:a81a8d6c1dfe 193 module->hw->COUNT8.INTFLAG.reg = TC_INTFLAG_MC(2);
mbed_official 15:a81a8d6c1dfe 194 }
mbed_official 15:a81a8d6c1dfe 195 }