2 * Copyright © 2019 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
16 #include <ao_tc-samd21.h>
19 ao_tc_set(struct samd21_tc *tc, uint8_t channel, uint32_t value)
21 tc->mode_16.cc[channel] = value;
25 ao_tc_init(struct samd21_tc *tc, uint32_t apbcmask)
27 samd21_pm.apbcmask |= apbcmask;
29 /* Reset the device */
30 tc->ctrla = (1 << SAMD21_TC_CTRLA_SWRST);
32 while ((tc->ctrla & (1 << SAMD21_TC_CTRLA_SWRST)) != 0 ||
33 (tc->status & (1 << SAMD21_TC_STATUS_SYNCBUSY)) != 0)
36 tc->ctrla = ((SAMD21_TC_CTRLA_PRESCSYNC_GCLK << SAMD21_TC_CTRLA_PRESCSYNC) |
37 (SAMD21_TC_CTRLA_PRESCALER_DIV1 << SAMD21_TC_CTRLA_PRESCALER) |
38 (SAMD21_TC_CTRLA_WAVEGEN_NPWM << SAMD21_TC_CTRLA_WAVEGEN) |
39 (SAMD21_TC_CTRLA_MODE_COUNT16) |
40 (1 << SAMD21_TC_CTRLA_ENABLE));
41 tc->dbgctrl = (1 << SAMD21_TC_DBGCTRL_DBGRUN);
45 ao_tc_samd21_init(void)
47 /* SAMD21G18 has only TC3-TC5 */
48 samd21_gclk_clkctrl(0, SAMD21_GCLK_CLKCTRL_ID_TCC2_TC3);
49 samd21_gclk_clkctrl(0, SAMD21_GCLK_CLKCTRL_ID_TC4_TC5);
51 ao_tc_init(&samd21_tc3, 1 << SAMD21_PM_APBCMASK_TC3);
52 ao_tc_init(&samd21_tc4, 1 << SAMD21_PM_APBCMASK_TC4);
53 ao_tc_init(&samd21_tc5, 1 << SAMD21_PM_APBCMASK_TC5);