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61 lines
1.3 KiB
C
61 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 direct access to GPIO pins
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include <string.h>
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#include "saul.h"
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#include "phydat.h"
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#include "periph/gpio.h"
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#include "saul/periph.h"
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static int read(const void *dev, phydat_t *res)
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{
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const saul_gpio_params_t *p = (const saul_gpio_params_t *)dev;
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int inverted = (p->flags & SAUL_GPIO_INVERTED);
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res->val[0] = (gpio_read(p->pin)) ? !inverted : inverted;
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res->unit = UNIT_BOOL;
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res->scale = 0;
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return 1;
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}
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static int write(const void *dev, phydat_t *state)
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{
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const saul_gpio_params_t *p = (const saul_gpio_params_t *)dev;
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int inverted = (p->flags & SAUL_GPIO_INVERTED);
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int value = (state->val[0] ? !inverted : inverted);
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gpio_write(p->pin, value);
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return 1;
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}
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const saul_driver_t gpio_out_saul_driver = {
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.read = read,
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.write = write,
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.type = SAUL_ACT_SWITCH
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};
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const saul_driver_t gpio_in_saul_driver = {
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.read = read,
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.write = saul_notsup,
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.type = SAUL_SENSE_BTN
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};
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