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In analogy to the existing GPIO mappings, this provides (write-only) SAUL entries for PWM'd LEDs in a single-LED (as SAUL_ACT_DIMMER) and an RGB (as SAUL_ACT_RGB_LED) mode. Co-authored-by: Marian Buschsieweke <marian.buschsieweke@ovgu.de>
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/*
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* Copyright (C) 2015 Freie Universität Berlin
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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 drivers_saul
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* @{
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*
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* @file
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* @brief SAUL wrapper for PWM pins
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*
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* @author Christian Amsüss <chrysn@fsfe.org>
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*
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* @}
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*/
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#include "saul.h"
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#include "phydat.h"
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#include "periph/pwm.h"
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#include "saul/periph.h"
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static inline void setchan(const saul_pwm_channel_t *chan, uint16_t value)
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{
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pwm_set(chan->dev,
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chan->channel,
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(chan->flags & SAUL_PWM_INVERTED) ? saul_pwm_resolution - value : value);
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}
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static int write_dimmer(const void *dev, phydat_t *state)
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{
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const saul_pwm_dimmer_params_t *p = dev;
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setchan(&p->channel, state->val[0]);
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return 3;
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}
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const saul_driver_t dimmer_saul_driver = {
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.read = saul_notsup,
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.write = write_dimmer,
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.type = SAUL_ACT_DIMMER
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};
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static int write_rgb(const void *dev, phydat_t *state)
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{
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const saul_pwm_rgb_params_t *p = dev;
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for (int i = 0; i < 3; ++i) {
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setchan(&p->channels[i], state->val[i]);
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}
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return 3;
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}
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const saul_driver_t rgb_saul_driver = {
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.read = saul_notsup,
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.write = write_rgb,
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.type = SAUL_ACT_LED_RGB
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};
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