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https://github.com/RIOT-OS/RIOT.git
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58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
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* Copyright (C) 2021 Gunar Schorcht
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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_mcp23x17
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* @brief MCP23x17 adaption to the RIOT actuator/sensor interface
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* @author Gunar Schorcht <gunar@schorcht.net>
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* @file
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*/
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#include <string.h>
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#include "saul.h"
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#include "mcp23x17.h"
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#if IS_USED(MODULE_SAUL_GPIO)
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extern mcp23x17_t mcp23x17_devs[];
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static int _read(const void *dev, phydat_t *res)
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{
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const mcp23x17_saul_gpio_params_t *p = (const mcp23x17_saul_gpio_params_t *)dev;
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int inverted = (p->gpio.flags & SAUL_GPIO_INVERTED);
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res->val[0] = (mcp23x17_gpio_read(&mcp23x17_devs[p->dev],
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p->gpio.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, const phydat_t *state)
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{
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const mcp23x17_saul_gpio_params_t *p = (const mcp23x17_saul_gpio_params_t *)dev;
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int inverted = (p->gpio.flags & SAUL_GPIO_INVERTED);
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int value = (state->val[0] ? !inverted : inverted);
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mcp23x17_gpio_write(&mcp23x17_devs[p->dev], p->gpio.pin, value);
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return 1;
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}
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const saul_driver_t mcp23x17_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 mcp23x17_gpio_in_saul_driver = {
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.read = _read,
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.write = saul_write_notsup,
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.type = SAUL_SENSE_BTN
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};
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#endif /* MODULE_SAUL_GPIO */
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