robert-hh
2 years ago
committed by
Damien George
Damien George
8 changed files with 6 additions and 220 deletions
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/*
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* This file is part of the MicroPython project, http://micropython.org/
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* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2019 Damien P. George |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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*/ |
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#include <stdint.h> |
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#include "py/gc.h" |
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#include "py/mphal.h" |
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#include "py/runtime.h" |
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#include "irq.h" |
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#include "softtimer.h" |
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#define TICKS_PERIOD 0x80000000 |
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#define TICKS_DIFF(t1, t0) ((int32_t)(((t1 - t0 + TICKS_PERIOD / 2) & (TICKS_PERIOD - 1)) - TICKS_PERIOD / 2)) |
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extern __IO uint32_t uwTick; |
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volatile uint32_t soft_timer_next; |
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// Pointer to the pairheap of soft timer objects.
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// This may contain bss/data pointers as well as GC-heap pointers,
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// and is explicitly GC traced by soft_timer_gc_mark_all().
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STATIC soft_timer_entry_t *soft_timer_heap; |
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STATIC int soft_timer_lt(mp_pairheap_t *n1, mp_pairheap_t *n2) { |
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soft_timer_entry_t *e1 = (soft_timer_entry_t *)n1; |
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soft_timer_entry_t *e2 = (soft_timer_entry_t *)n2; |
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return TICKS_DIFF(e1->expiry_ms, e2->expiry_ms) < 0; |
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} |
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STATIC void soft_timer_schedule_systick(uint32_t ticks_ms) { |
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uint32_t irq_state = disable_irq(); |
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uint32_t uw_tick = uwTick; |
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if (TICKS_DIFF(ticks_ms, uw_tick) <= 0) { |
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soft_timer_next = uw_tick + 1; |
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} else { |
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soft_timer_next = ticks_ms; |
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} |
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enable_irq(irq_state); |
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} |
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void soft_timer_deinit(void) { |
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// Pop off all the nodes which are allocated on the GC-heap.
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uint32_t irq_state = raise_irq_pri(IRQ_PRI_PENDSV); |
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soft_timer_entry_t *heap_from = soft_timer_heap; |
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soft_timer_entry_t *heap_to = (soft_timer_entry_t *)mp_pairheap_new(soft_timer_lt); |
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while (heap_from != NULL) { |
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soft_timer_entry_t *entry = (soft_timer_entry_t *)mp_pairheap_peek(soft_timer_lt, &heap_from->pairheap); |
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heap_from = (soft_timer_entry_t *)mp_pairheap_pop(soft_timer_lt, &heap_from->pairheap); |
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if (!(entry->flags & SOFT_TIMER_FLAG_GC_ALLOCATED)) { |
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heap_to = (soft_timer_entry_t *)mp_pairheap_push(soft_timer_lt, &heap_to->pairheap, &entry->pairheap); |
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} |
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} |
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soft_timer_heap = heap_to; |
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restore_irq_pri(irq_state); |
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} |
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// Must be executed at IRQ_PRI_PENDSV
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void soft_timer_handler(void) { |
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uint32_t ticks_ms = uwTick; |
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soft_timer_entry_t *heap = soft_timer_heap; |
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while (heap != NULL && TICKS_DIFF(heap->expiry_ms, ticks_ms) <= 0) { |
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soft_timer_entry_t *entry = heap; |
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heap = (soft_timer_entry_t *)mp_pairheap_pop(soft_timer_lt, &heap->pairheap); |
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if (entry->flags & SOFT_TIMER_FLAG_PY_CALLBACK) { |
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mp_sched_schedule(entry->py_callback, MP_OBJ_FROM_PTR(entry)); |
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} else { |
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entry->c_callback(entry); |
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} |
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if (entry->mode == SOFT_TIMER_MODE_PERIODIC) { |
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entry->expiry_ms += entry->delta_ms; |
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heap = (soft_timer_entry_t *)mp_pairheap_push(soft_timer_lt, &heap->pairheap, &entry->pairheap); |
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} |
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} |
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soft_timer_heap = heap; |
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if (heap == NULL) { |
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// No more timers left, set largest delay possible
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soft_timer_next = uwTick; |
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} else { |
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// Set soft_timer_next so SysTick calls us back at the correct time
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soft_timer_schedule_systick(heap->expiry_ms); |
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} |
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} |
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void soft_timer_gc_mark_all(void) { |
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// Mark all soft timer nodes that are allocated on the GC-heap.
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// To avoid deep C recursion, pop and recreate the pairheap as nodes are marked.
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uint32_t irq_state = raise_irq_pri(IRQ_PRI_PENDSV); |
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soft_timer_entry_t *heap_from = soft_timer_heap; |
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soft_timer_entry_t *heap_to = (soft_timer_entry_t *)mp_pairheap_new(soft_timer_lt); |
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while (heap_from != NULL) { |
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soft_timer_entry_t *entry = (soft_timer_entry_t *)mp_pairheap_peek(soft_timer_lt, &heap_from->pairheap); |
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heap_from = (soft_timer_entry_t *)mp_pairheap_pop(soft_timer_lt, &heap_from->pairheap); |
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if (entry->flags & SOFT_TIMER_FLAG_GC_ALLOCATED) { |
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gc_collect_root((void **)&entry, 1); |
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} |
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heap_to = (soft_timer_entry_t *)mp_pairheap_push(soft_timer_lt, &heap_to->pairheap, &entry->pairheap); |
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} |
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soft_timer_heap = heap_to; |
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restore_irq_pri(irq_state); |
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} |
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void soft_timer_static_init(soft_timer_entry_t *entry, uint16_t mode, uint32_t delta_ms, void (*cb)(soft_timer_entry_t *)) { |
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mp_pairheap_init_node(soft_timer_lt, &entry->pairheap); |
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entry->flags = 0; |
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entry->mode = mode; |
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entry->delta_ms = delta_ms; |
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entry->c_callback = cb; |
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} |
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void soft_timer_insert(soft_timer_entry_t *entry, uint32_t initial_delta_ms) { |
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mp_pairheap_init_node(soft_timer_lt, &entry->pairheap); |
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entry->expiry_ms = mp_hal_ticks_ms() + initial_delta_ms; |
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uint32_t irq_state = raise_irq_pri(IRQ_PRI_PENDSV); |
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soft_timer_heap = (soft_timer_entry_t *)mp_pairheap_push(soft_timer_lt, &soft_timer_heap->pairheap, &entry->pairheap); |
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if (entry == soft_timer_heap) { |
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// This new timer became the earliest one so set soft_timer_next
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soft_timer_schedule_systick(entry->expiry_ms); |
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} |
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restore_irq_pri(irq_state); |
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} |
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void soft_timer_remove(soft_timer_entry_t *entry) { |
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uint32_t irq_state = raise_irq_pri(IRQ_PRI_PENDSV); |
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soft_timer_heap = (soft_timer_entry_t *)mp_pairheap_delete(soft_timer_lt, &soft_timer_heap->pairheap, &entry->pairheap); |
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restore_irq_pri(irq_state); |
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} |
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@ -1,66 +0,0 @@ |
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/*
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* This file is part of the MicroPython project, http://micropython.org/
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* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2019 Damien P. George |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
|||
* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
|||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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*/ |
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#ifndef MICROPY_INCLUDED_STM32_SOFTTIMER_H |
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#define MICROPY_INCLUDED_STM32_SOFTTIMER_H |
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#include "py/pairheap.h" |
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#define SOFT_TIMER_FLAG_PY_CALLBACK (1) |
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#define SOFT_TIMER_FLAG_GC_ALLOCATED (2) |
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#define SOFT_TIMER_MODE_ONE_SHOT (1) |
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#define SOFT_TIMER_MODE_PERIODIC (2) |
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typedef struct _soft_timer_entry_t { |
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mp_pairheap_t pairheap; |
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uint16_t flags; |
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uint16_t mode; |
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uint32_t expiry_ms; |
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uint32_t delta_ms; // for periodic mode
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union { |
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void (*c_callback)(struct _soft_timer_entry_t *); |
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mp_obj_t py_callback; |
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}; |
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} soft_timer_entry_t; |
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extern volatile uint32_t soft_timer_next; |
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void soft_timer_deinit(void); |
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void soft_timer_handler(void); |
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void soft_timer_gc_mark_all(void); |
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void soft_timer_static_init(soft_timer_entry_t *entry, uint16_t mode, uint32_t delta_ms, void (*cb)(soft_timer_entry_t *)); |
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void soft_timer_insert(soft_timer_entry_t *entry, uint32_t initial_delta_ms); |
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void soft_timer_remove(soft_timer_entry_t *entry); |
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// The timer will be reinserted into the heap so that it is called after initial_delta_ms milliseconds.
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// After that, if it's periodic, it will continue to be called every entry->delta_ms milliseconds.
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static inline void soft_timer_reinsert(soft_timer_entry_t *entry, uint32_t initial_delta_ms) { |
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soft_timer_remove(entry); |
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soft_timer_insert(entry, initial_delta_ms); |
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} |
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#endif // MICROPY_INCLUDED_STM32_SOFTTIMER_H
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