39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
/*
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* sysfsgpio.h
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*
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* Copyright (C) 2011 by Digi International Inc.
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* Description: GPIO SYSFS API header file.
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*
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*/
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#ifndef SYSFSGPIO_H_
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#define SYSFSGPIO_H_
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#define SYSFS_GPIO_DIR "/sys/class/gpio"
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#define MAX_LEN 64
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int sysfs_gpio_export(int gpio);
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int sysfs_gpio_unexport(int gpio);
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int sysfs_gpio_set_direction(int gpio, unsigned int out);
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int sysfs_gpio_get_direction(int gpio, char * dir, int len);
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int sysfs_gpio_set_active_low(int gpio, unsigned int low);
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int sysfs_gpio_get_active_low(int gpio, unsigned int *value);
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int sysfs_gpio_set_value(int gpio, unsigned int value);
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int sysfs_gpio_get_value(int gpio, unsigned int *value);
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int sysfs_gpio_set_edge(int gpio, char *edge);
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int sysfs_gpio_get_edge(int gpio, char *edge, int len);
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int sysfs_gpio_poll(int gpio, unsigned int timeout);
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#endif /* SYSFSGPIO_H_ */
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