micropython/ports/stm32/systick.h

61 wiersze
2.2 KiB
C

/*
* This file is part of the MicroPython 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.
*/
#ifndef MICROPY_INCLUDED_STM32_SYSTICK_H
#define MICROPY_INCLUDED_STM32_SYSTICK_H
// Works for x between 0 and 16 inclusive
#define POW2_CEIL(x) ((((x) - 1) | ((x) - 1) >> 1 | ((x) - 1) >> 2 | ((x) - 1) >> 3) + 1)
enum {
SYSTICK_DISPATCH_DMA = 0,
#if MICROPY_HW_ENABLE_STORAGE
SYSTICK_DISPATCH_STORAGE,
#endif
#if MICROPY_PY_NETWORK && MICROPY_PY_LWIP
SYSTICK_DISPATCH_LWIP,
#endif
SYSTICK_DISPATCH_MAX
};
#define SYSTICK_DISPATCH_NUM_SLOTS POW2_CEIL(SYSTICK_DISPATCH_MAX)
typedef void (*systick_dispatch_t)(uint32_t);
extern systick_dispatch_t systick_dispatch_table[SYSTICK_DISPATCH_NUM_SLOTS];
static inline void systick_enable_dispatch(size_t slot, systick_dispatch_t f) {
systick_dispatch_table[slot] = f;
}
static inline void systick_disable_dispatch(size_t slot) {
systick_dispatch_table[slot] = NULL;
}
void systick_wait_at_least(uint32_t stc, uint32_t delay_ms);
bool systick_has_passed(uint32_t stc, uint32_t delay_ms);
#endif // MICROPY_INCLUDED_STM32_SYSTICK_H