76 lines
2.5 KiB
C
76 lines
2.5 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) 2017 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 <stdbool.h>
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#include <stdint.h>
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#include "peripherals/timers.h"
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//#include "common-hal/pulseio/PulseOut.h"
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#include "hpl/gclk/hpl_gclk_base.h"
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const uint8_t tcc_cc_num[3] = {4, 2, 2};
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const uint8_t tc_gclk_ids[TC_INST_NUM] = {TC3_GCLK_ID,
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TC4_GCLK_ID,
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TC5_GCLK_ID,
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#ifdef TC6_GCLK_ID
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TC6_GCLK_ID,
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#endif
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#ifdef TC7_GCLK_ID
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TC7_GCLK_ID,
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#endif
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};
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const uint8_t tcc_gclk_ids[3] = {TCC0_GCLK_ID, TCC1_GCLK_ID, TCC2_GCLK_ID};
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void turn_on_clocks(bool is_tc, uint8_t index, uint32_t gclk_index) {
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uint8_t gclk_id;
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if (is_tc) {
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gclk_id = tc_gclk_ids[index];
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} else {
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gclk_id = tcc_gclk_ids[index];
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}
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// Determine the clock slot on the APBC bus. TCC0 is the first and 8 slots in.
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uint8_t clock_slot = 8 + index;
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// We index TCs starting at zero but in memory they begin at three so we have to add three.
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if (is_tc) {
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clock_slot += 3;
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}
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PM->APBCMASK.reg |= 1 << clock_slot;
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_gclk_enable_channel(gclk_id, gclk_index);
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}
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void tc_set_enable(Tc* tc, bool enable) {
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tc->COUNT16.CTRLA.bit.ENABLE = enable;
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while (tc->COUNT16.STATUS.bit.SYNCBUSY != 0) {
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/* Wait for sync */
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}
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}
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void tc_wait_for_sync(Tc* tc) {
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while (tc->COUNT16.STATUS.bit.SYNCBUSY != 0) {}
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}
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