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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?
User | Revision | Line number | New contents of line |
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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 | } |