60 lines
2.0 KiB
C
60 lines
2.0 KiB
C
/*
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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) 2018 Scott Shawcroft for Adafruit Industries
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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 "peripherals/events.h"
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#include "py/runtime.h"
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uint8_t find_async_event_channel(void) {
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int8_t channel;
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for (channel = EVSYS_CHANNELS - 1; channel > 0; channel--) {
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if (event_channel_free(channel)) {
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break;
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}
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}
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if (channel < 0) {
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mp_raise_RuntimeError("All event channels in use");
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}
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return channel;
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}
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#ifdef SAMD21
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#define EVSYS_SYNCH_NUM EVSYS_CHANNELS
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#endif
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uint8_t find_sync_event_channel(void) {
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uint8_t channel;
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for (channel = 0; channel < EVSYS_SYNCH_NUM; channel++) {
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if (event_channel_free(channel)) {
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break;
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}
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}
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if (channel >= EVSYS_SYNCH_NUM) {
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mp_raise_RuntimeError("All sync event channels in use");
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}
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return channel;
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}
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