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targets/hal/TARGET_Atmel/common/utils/interrupt/interrupt_sam_nvic.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?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 579:53297373a894 | 1 | #include "interrupt_sam_nvic.h" |
mbed_official | 579:53297373a894 | 2 | |
mbed_official | 579:53297373a894 | 3 | #if !defined(__DOXYGEN__) |
mbed_official | 579:53297373a894 | 4 | /* Deprecated - global flag to determine the global interrupt state. Required by |
mbed_official | 579:53297373a894 | 5 | * QTouch library, however new applications should use cpu_irq_is_enabled() |
mbed_official | 579:53297373a894 | 6 | * which probes the true global interrupt state from the CPU special registers. |
mbed_official | 579:53297373a894 | 7 | */ |
mbed_official | 579:53297373a894 | 8 | volatile bool g_interrupt_enabled = true; |
mbed_official | 579:53297373a894 | 9 | #endif |
mbed_official | 579:53297373a894 | 10 | |
mbed_official | 579:53297373a894 | 11 | void cpu_irq_enter_critical(void) |
mbed_official | 579:53297373a894 | 12 | { |
mbed_official | 579:53297373a894 | 13 | if (cpu_irq_critical_section_counter == 0) { |
mbed_official | 579:53297373a894 | 14 | if (cpu_irq_is_enabled()) { |
mbed_official | 579:53297373a894 | 15 | cpu_irq_disable(); |
mbed_official | 579:53297373a894 | 16 | cpu_irq_prev_interrupt_state = true; |
mbed_official | 579:53297373a894 | 17 | } else { |
mbed_official | 579:53297373a894 | 18 | /* Make sure the to save the prev state as false */ |
mbed_official | 579:53297373a894 | 19 | cpu_irq_prev_interrupt_state = false; |
mbed_official | 579:53297373a894 | 20 | } |
mbed_official | 579:53297373a894 | 21 | |
mbed_official | 579:53297373a894 | 22 | } |
mbed_official | 579:53297373a894 | 23 | |
mbed_official | 579:53297373a894 | 24 | cpu_irq_critical_section_counter++; |
mbed_official | 579:53297373a894 | 25 | } |
mbed_official | 579:53297373a894 | 26 | |
mbed_official | 579:53297373a894 | 27 | void cpu_irq_leave_critical(void) |
mbed_official | 579:53297373a894 | 28 | { |
mbed_official | 579:53297373a894 | 29 | /* Check if the user is trying to leave a critical section when not in a critical section */ |
mbed_official | 579:53297373a894 | 30 | Assert(cpu_irq_critical_section_counter > 0); |
mbed_official | 579:53297373a894 | 31 | |
mbed_official | 579:53297373a894 | 32 | cpu_irq_critical_section_counter--; |
mbed_official | 579:53297373a894 | 33 | |
mbed_official | 579:53297373a894 | 34 | /* Only enable global interrupts when the counter reaches 0 and the state of the global interrupt flag |
mbed_official | 579:53297373a894 | 35 | was enabled when entering critical state */ |
mbed_official | 579:53297373a894 | 36 | if ((cpu_irq_critical_section_counter == 0) && (cpu_irq_prev_interrupt_state)) { |
mbed_official | 579:53297373a894 | 37 | cpu_irq_enable(); |
mbed_official | 579:53297373a894 | 38 | } |
mbed_official | 579:53297373a894 | 39 | } |
mbed_official | 579:53297373a894 | 40 |