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105 lines
1.9 KiB
C
105 lines
1.9 KiB
C
/*
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* Copyright (C) 2018 Gilles DOFFE <g.doffe@gmail.com>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_native
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* @ingroup drivers_periph_pwm
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* @{
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*
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* @file
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* @brief Low-level PWM driver implementation
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*
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* @author Gilles DOFFE <g.doffe@gmail.com>
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* @}
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*/
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#include <assert.h>
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#include <errno.h>
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#include "periph/pwm.h"
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#define ENABLE_DEBUG 0
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#include "debug.h"
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#ifdef PWM_NUMOF
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#define NATIVE_PWM_SPEED 1000000
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#define NATIVE_PWM_NB_CHAN 2
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#define NATIVE_PWM_MAX 65535
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typedef struct {
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uint16_t duty_cycle;
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uint8_t on;
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} native_pwm_t;
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native_pwm_t pwms[PWM_NUMOF][NATIVE_PWM_NB_CHAN];
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uint32_t pwm_init(pwm_t pwm, pwm_mode_t mode, uint32_t freq, uint16_t res)
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{
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uint8_t i = 0;
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(void) mode;
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(void) freq;
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(void) res;
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if (pwm >= PWM_NUMOF)
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{
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errno = ENODEV;
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goto pwm_init_err;
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}
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/* reset pwm channels */
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for (i = 0; i < NATIVE_PWM_NB_CHAN; i++)
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{
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pwms[pwm][i].duty_cycle = 0;
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pwms[pwm][i].on = 0;
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}
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return freq;
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pwm_init_err:
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return 0;
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}
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uint8_t pwm_channels(pwm_t pwm)
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{
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(void) pwm;
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return NATIVE_PWM_NB_CHAN;
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}
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void pwm_set(pwm_t pwm, uint8_t channel, uint16_t value)
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{
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assert(pwm < PWM_NUMOF);
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/* set new value */
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pwms[pwm][channel].duty_cycle = value;
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DEBUG("%s pwms[%u][%u] = %u\n", __func__, pwm, channel, value);
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}
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void pwm_poweron(pwm_t pwm)
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{
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uint8_t i = 0;
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assert(pwm < PWM_NUMOF);
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/* reset pwm channels */
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for (i = 0; i < NATIVE_PWM_NB_CHAN; i++)
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pwms[pwm][i].on = 1;
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}
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void pwm_poweroff(pwm_t pwm)
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{
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uint8_t i = 0;
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assert(pwm < PWM_NUMOF);
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/* reset pwm channels */
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for (i = 0; i < NATIVE_PWM_NB_CHAN; i++)
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pwms[pwm][i].on = 0;
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}
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#endif /* PWM_NUMOF */
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