mbed library sources
Fork of mbed-src by
targets/hal/TARGET_Atmel/common/utils/interrupt/interrupt_sam_nvic.c@579:53297373a894, 2015-07-01 (annotated)
- Committer:
- mbed_official
- Date:
- Wed Jul 01 09:45:11 2015 +0100
- Revision:
- 579:53297373a894
- Child:
- 592:a274ee790e56
Synchronized with git revision d5b4d2ab9c47edb4dc5776e7177b0c2263459081
Full URL: https://github.com/mbedmicro/mbed/commit/d5b4d2ab9c47edb4dc5776e7177b0c2263459081/
Initial version of drivers for SAMR21
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 579:53297373a894 | 1 | /** |
mbed_official | 579:53297373a894 | 2 | * \file |
mbed_official | 579:53297373a894 | 3 | * |
mbed_official | 579:53297373a894 | 4 | * \brief Global interrupt management for SAM D20, SAM3 and SAM4 (NVIC based) |
mbed_official | 579:53297373a894 | 5 | * |
mbed_official | 579:53297373a894 | 6 | * Copyright (c) 2012-2014 Atmel Corporation. All rights reserved. |
mbed_official | 579:53297373a894 | 7 | * |
mbed_official | 579:53297373a894 | 8 | * \asf_license_start |
mbed_official | 579:53297373a894 | 9 | * |
mbed_official | 579:53297373a894 | 10 | * \page License |
mbed_official | 579:53297373a894 | 11 | * |
mbed_official | 579:53297373a894 | 12 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 579:53297373a894 | 13 | * modification, are permitted provided that the following conditions are met: |
mbed_official | 579:53297373a894 | 14 | * |
mbed_official | 579:53297373a894 | 15 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 579:53297373a894 | 16 | * this list of conditions and the following disclaimer. |
mbed_official | 579:53297373a894 | 17 | * |
mbed_official | 579:53297373a894 | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 579:53297373a894 | 19 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 579:53297373a894 | 20 | * and/or other materials provided with the distribution. |
mbed_official | 579:53297373a894 | 21 | * |
mbed_official | 579:53297373a894 | 22 | * 3. The name of Atmel may not be used to endorse or promote products derived |
mbed_official | 579:53297373a894 | 23 | * from this software without specific prior written permission. |
mbed_official | 579:53297373a894 | 24 | * |
mbed_official | 579:53297373a894 | 25 | * 4. This software may only be redistributed and used in connection with an |
mbed_official | 579:53297373a894 | 26 | * Atmel microcontroller product. |
mbed_official | 579:53297373a894 | 27 | * |
mbed_official | 579:53297373a894 | 28 | * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED |
mbed_official | 579:53297373a894 | 29 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
mbed_official | 579:53297373a894 | 30 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
mbed_official | 579:53297373a894 | 31 | * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR |
mbed_official | 579:53297373a894 | 32 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 579:53297373a894 | 33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
mbed_official | 579:53297373a894 | 34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
mbed_official | 579:53297373a894 | 35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
mbed_official | 579:53297373a894 | 36 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
mbed_official | 579:53297373a894 | 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
mbed_official | 579:53297373a894 | 38 | * POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 579:53297373a894 | 39 | * |
mbed_official | 579:53297373a894 | 40 | * \asf_license_stop |
mbed_official | 579:53297373a894 | 41 | * |
mbed_official | 579:53297373a894 | 42 | */ |
mbed_official | 579:53297373a894 | 43 | /** |
mbed_official | 579:53297373a894 | 44 | * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a> |
mbed_official | 579:53297373a894 | 45 | */ |
mbed_official | 579:53297373a894 | 46 | |
mbed_official | 579:53297373a894 | 47 | #include "interrupt_sam_nvic.h" |
mbed_official | 579:53297373a894 | 48 | |
mbed_official | 579:53297373a894 | 49 | #if !defined(__DOXYGEN__) |
mbed_official | 579:53297373a894 | 50 | /* Deprecated - global flag to determine the global interrupt state. Required by |
mbed_official | 579:53297373a894 | 51 | * QTouch library, however new applications should use cpu_irq_is_enabled() |
mbed_official | 579:53297373a894 | 52 | * which probes the true global interrupt state from the CPU special registers. |
mbed_official | 579:53297373a894 | 53 | */ |
mbed_official | 579:53297373a894 | 54 | volatile bool g_interrupt_enabled = true; |
mbed_official | 579:53297373a894 | 55 | #endif |
mbed_official | 579:53297373a894 | 56 | |
mbed_official | 579:53297373a894 | 57 | void cpu_irq_enter_critical(void) |
mbed_official | 579:53297373a894 | 58 | { |
mbed_official | 579:53297373a894 | 59 | if (cpu_irq_critical_section_counter == 0) { |
mbed_official | 579:53297373a894 | 60 | if (cpu_irq_is_enabled()) { |
mbed_official | 579:53297373a894 | 61 | cpu_irq_disable(); |
mbed_official | 579:53297373a894 | 62 | cpu_irq_prev_interrupt_state = true; |
mbed_official | 579:53297373a894 | 63 | } else { |
mbed_official | 579:53297373a894 | 64 | /* Make sure the to save the prev state as false */ |
mbed_official | 579:53297373a894 | 65 | cpu_irq_prev_interrupt_state = false; |
mbed_official | 579:53297373a894 | 66 | } |
mbed_official | 579:53297373a894 | 67 | |
mbed_official | 579:53297373a894 | 68 | } |
mbed_official | 579:53297373a894 | 69 | |
mbed_official | 579:53297373a894 | 70 | cpu_irq_critical_section_counter++; |
mbed_official | 579:53297373a894 | 71 | } |
mbed_official | 579:53297373a894 | 72 | |
mbed_official | 579:53297373a894 | 73 | void cpu_irq_leave_critical(void) |
mbed_official | 579:53297373a894 | 74 | { |
mbed_official | 579:53297373a894 | 75 | /* Check if the user is trying to leave a critical section when not in a critical section */ |
mbed_official | 579:53297373a894 | 76 | Assert(cpu_irq_critical_section_counter > 0); |
mbed_official | 579:53297373a894 | 77 | |
mbed_official | 579:53297373a894 | 78 | cpu_irq_critical_section_counter--; |
mbed_official | 579:53297373a894 | 79 | |
mbed_official | 579:53297373a894 | 80 | /* Only enable global interrupts when the counter reaches 0 and the state of the global interrupt flag |
mbed_official | 579:53297373a894 | 81 | was enabled when entering critical state */ |
mbed_official | 579:53297373a894 | 82 | if ((cpu_irq_critical_section_counter == 0) && (cpu_irq_prev_interrupt_state)) { |
mbed_official | 579:53297373a894 | 83 | cpu_irq_enable(); |
mbed_official | 579:53297373a894 | 84 | } |
mbed_official | 579:53297373a894 | 85 | } |
mbed_official | 579:53297373a894 | 86 |