irq.h 4.29 KB
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/*
 * This file is part of the Micro Python project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013, 2014 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.
 */

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// these states correspond to values from query_irq, enable_irq and disable_irq
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#define IRQ_STATE_DISABLED (0x00000001)
#define IRQ_STATE_ENABLED  (0x00000000)
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static inline mp_uint_t query_irq(void) {
    return __get_PRIMASK();
}

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// enable_irq and disable_irq are defined inline in mpconfigport.h
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MP_DECLARE_CONST_FUN_OBJ(pyb_wfi_obj);
MP_DECLARE_CONST_FUN_OBJ(pyb_disable_irq_obj);
MP_DECLARE_CONST_FUN_OBJ(pyb_enable_irq_obj);
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// IRQ priority definitions.
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//
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// Lower number implies higher interrupt priority.
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//
// The default priority grouping is set to NVIC_PRIORITYGROUP_4 in the
// HAL_Init function. This corresponds to 4 bits for the priority field
// and 0 bits for the sub-priority field (which means that for all intensive
// purposes that 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 priority of the SysTick timer is determined from the TICK_INT_PRIORITY
// value which is normally set to 0 in the stm32f4xx_hal_conf.h file.
//
// The following interrupts are arranged from highest priority to lowest
// priority to make it a bit easier to figure out.

//                           Priority   Sub-Priority
//                           --------   ------------
//#def  IRQ_PRI_SYSTICK         0
//#def  IRQ_SUBPRI_SYSTICK                  0
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// Flash IRQ must be higher priority than interrupts of all those components
// that rely on the flash storage.
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#define IRQ_PRI_FLASH           1
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#define IRQ_SUBPRI_FLASH                    0
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// SDIO must be higher priority than DMA for SDIO DMA transfers to work.
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#define IRQ_PRI_SDIO            4
#define IRQ_SUBPRI_SDIO                     0
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// DMA should be higher priority than USB, since USB Mass Storage calls
// into the sdcard driver which waits for the DMA to complete.
#define IRQ_PRI_DMA             5
#define IRQ_SUBPRI_DMA                      0
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#define IRQ_PRI_OTG_FS          6
#define IRQ_SUBPRI_OTG_FS                   0

#define IRQ_PRI_OTG_HS          6
#define IRQ_SUBPRI_OTG_HS                   0
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#define IRQ_PRI_TIM3            6
#define IRQ_SUBPRI_TIM3                     0
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#define IRQ_PRI_TIM5            6
#define IRQ_SUBPRI_TIM5                     0
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#define IRQ_PRI_CAN             7
#define IRQ_SUBPRI_CAN                      0

#define IRQ_PRI_UART            13
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#define IRQ_SUBPRI_UART                     0
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// Interrupt priority for non-special timers.
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#define IRQ_PRI_TIMX            14
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#define IRQ_SUBPRI_TIMX                     0
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#define IRQ_PRI_EXTINT          15
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#define IRQ_SUBPRI_EXTINT                   0
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// PENDSV should be at the lowst priority so that other interrupts complete
// before exception is raised.
#define IRQ_PRI_PENDSV          15
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#define IRQ_SUBPRI_PENDSV                   0
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#define IRQ_PRI_RTC_WKUP        15
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#define IRQ_SUBPRI_RTC_WKUP                 0
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