81 lines
3.4 KiB
C
81 lines
3.4 KiB
C
|
/*
|
||
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
||
|
|
*
|
||
|
|
* The MIT License (MIT)
|
||
|
|
*
|
||
|
|
* Copyright (c) 2023 Damien P. George
|
||
|
|
*
|
||
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
* of this software and associated documentation files (the "Software"), to deal
|
||
|
|
* in the Software without restriction, including without limitation the rights
|
||
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
* copies of the Software, and to permit persons to whom the Software is
|
||
|
|
* furnished to do so, subject to the following conditions:
|
||
|
|
*
|
||
|
|
* The above copyright notice and this permission notice shall be included in
|
||
|
|
* all copies or substantial portions of the Software.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
* THE SOFTWARE.
|
||
|
|
*/
|
||
|
|
#ifndef MICROPY_INCLUDED_MIMXRT_IRQ_H
|
||
|
|
#define MICROPY_INCLUDED_MIMXRT_IRQ_H
|
||
|
|
|
||
|
|
#define NVIC_PRIORITYGROUP_4 ((uint32_t)0x00000003)
|
||
|
|
|
||
|
|
static inline uint32_t query_irq(void) {
|
||
|
|
return __get_PRIMASK();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline uint32_t raise_irq_pri(uint32_t pri) {
|
||
|
|
uint32_t basepri = __get_BASEPRI();
|
||
|
|
// If non-zero, the processor does not process any exception with a
|
||
|
|
// priority value greater than or equal to BASEPRI.
|
||
|
|
// When writing to BASEPRI_MAX the write goes to BASEPRI only if either:
|
||
|
|
// - Rn is non-zero and the current BASEPRI value is 0
|
||
|
|
// - Rn is non-zero and less than the current BASEPRI value
|
||
|
|
pri <<= (8 - __NVIC_PRIO_BITS);
|
||
|
|
__ASM volatile ("msr basepri_max, %0" : : "r" (pri) : "memory");
|
||
|
|
return basepri;
|
||
|
|
}
|
||
|
|
|
||
|
|
// "basepri" should be the value returned from raise_irq_pri
|
||
|
|
static inline void restore_irq_pri(uint32_t basepri) {
|
||
|
|
__set_BASEPRI(basepri);
|
||
|
|
}
|
||
|
|
|
||
|
|
// IRQ priority definitions.
|
||
|
|
//
|
||
|
|
// Lower number implies higher interrupt priority.
|
||
|
|
//
|
||
|
|
// The default priority grouping used in this port is NVIC_PRIORITYGROUP_4.
|
||
|
|
// This corresponds to 4 bits for the priority field and 0 bits for the
|
||
|
|
// sub-priority field (which means that for all intents and purposes the
|
||
|
|
// sub-priorities below are ignored).
|
||
|
|
//
|
||
|
|
// While a given interrupt is being processed, only higher priority (lower number)
|
||
|
|
// interrupts will preempt a given interrupt. If sub-priorities are active
|
||
|
|
// then the sub-priority determines the order that pending interrupts of
|
||
|
|
// a given priority are executed. This is only meaningful if 2 or more
|
||
|
|
// interrupts of the same priority are pending at the same time.
|
||
|
|
//
|
||
|
|
// The following interrupts are arranged from highest priority to lowest
|
||
|
|
// priority to make it a bit easier to figure out.
|
||
|
|
|
||
|
|
#define IRQ_PRI_SYSTICK NVIC_EncodePriority(NVIC_PRIORITYGROUP_4, 0, 0)
|
||
|
|
|
||
|
|
#define IRQ_PRI_OTG_HS NVIC_EncodePriority(NVIC_PRIORITYGROUP_4, 6, 0)
|
||
|
|
|
||
|
|
#define IRQ_PRI_EXTINT NVIC_EncodePriority(NVIC_PRIORITYGROUP_4, 14, 0)
|
||
|
|
|
||
|
|
// PENDSV should be at the lowst priority so that other interrupts complete
|
||
|
|
// before exception is raised.
|
||
|
|
#define IRQ_PRI_PENDSV NVIC_EncodePriority(NVIC_PRIORITYGROUP_4, 15, 0)
|
||
|
|
|
||
|
|
#endif // MICROPY_INCLUDED_MIMXRT_IRQ_H
|