4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
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11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
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18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
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29 * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
33 * \brief PWM driver (implementation)
37 * \author Francesco Sacchi <batt@develer.com>
38 * \author Daniele Basile <asterix@develer.com>
41 #include <cfg/macros.h>
42 #include <cfg/debug.h>
46 #include CPU_HEADER(pwm)
48 #include <cpu/types.h>
53 * Set duty of pwm channel \p dev.
55 void pwm_setDuty(PwmDev dev, pwm_duty_t duty)
57 pwm_period_t period = 0;
58 pwm_duty_t real_duty = 0;
60 duty = MIN(duty, PWM_MAX_DUTY);
62 period = pwm_hw_getPeriod(dev);
64 real_duty = (uint64_t)(duty * period) >> (uint64_t)PWM_MAX_PERIOD_LOG2;
66 // TRACEMSG("real_duty[%d] duty[%d], period[%d]", real_duty, duty, period);
67 pwm_hw_setDutyUnlock(dev, real_duty);
71 * Set frequency of pwm channel \p dev at \p freq in Hz.
73 void pwm_setFrequency(PwmDev dev, pwm_freq_t freq)
75 pwm_hw_setFrequency(dev, freq);
79 * Set duty of pwm channel \p dev.
81 void pwm_enable(PwmDev dev, bool state)
97 IRQ_SAVE_DISABLE(flags);
101 /* set all pwm to 0 */
102 for (dev = 0; dev < PWM_CNT; dev++)