138 lines
4.5 KiB
C
138 lines
4.5 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 "hri/hri_gclk_d51.h"
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const uint8_t tcc_cc_num[5] = {6, 4, 3, 2, 2};
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const uint8_t tc_gclk_ids[TC_INST_NUM] = {TC0_GCLK_ID,
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TC1_GCLK_ID,
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TC2_GCLK_ID,
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TC3_GCLK_ID,
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#ifdef TC4_GCLK_ID
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TC4_GCLK_ID,
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#endif
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#ifdef TC5_GCLK_ID
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TC5_GCLK_ID,
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#endif
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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[TCC_INST_NUM] = {TCC0_GCLK_ID,
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TCC1_GCLK_ID,
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TCC2_GCLK_ID,
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#ifdef TCC3_GCLK_ID
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TCC3_GCLK_ID,
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#endif
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#ifdef TCC4_GCLK_ID
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TCC4_GCLK_ID
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#endif
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};
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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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// Turn on the clocks for the peripherals.
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if (is_tc) {
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switch (index) {
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case 0:
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MCLK->APBAMASK.reg |= MCLK_APBAMASK_TC0;
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break;
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case 1:
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MCLK->APBAMASK.reg |= MCLK_APBAMASK_TC1;
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break;
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case 2:
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MCLK->APBBMASK.reg |= MCLK_APBBMASK_TC2;
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break;
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case 3:
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MCLK->APBBMASK.reg |= MCLK_APBBMASK_TC3;
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break;
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case 4:
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MCLK->APBCMASK.reg |= MCLK_APBCMASK_TC4;
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break;
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case 5:
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MCLK->APBCMASK.reg |= MCLK_APBCMASK_TC5;
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break;
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case 6:
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MCLK->APBDMASK.reg |= MCLK_APBDMASK_TC6;
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break;
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case 7:
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MCLK->APBDMASK.reg |= MCLK_APBDMASK_TC7;
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break;
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default:
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break;
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}
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} else {
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switch (index) {
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case 0:
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MCLK->APBBMASK.reg |= MCLK_APBBMASK_TCC0;
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break;
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case 1:
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MCLK->APBBMASK.reg |= MCLK_APBBMASK_TCC1;
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break;
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case 2:
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MCLK->APBCMASK.reg |= MCLK_APBCMASK_TCC2;
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break;
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case 3:
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MCLK->APBCMASK.reg |= MCLK_APBCMASK_TCC3;
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break;
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case 4:
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MCLK->APBDMASK.reg |= MCLK_APBDMASK_TCC4;
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break;
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default:
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break;
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}
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}
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// FIXME(tannewt): TC4-TC7 can only have 100mhz inputs.
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hri_gclk_write_PCHCTRL_reg(GCLK, gclk_id,
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gclk_index | (1 << GCLK_PCHCTRL_CHEN_Pos));
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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.SYNCBUSY.bit.ENABLE != 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.SYNCBUSY.reg != 0) {}
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}
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