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circuits_gpio

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circuits_gpio c_src hal_sysfs.h
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c_src/hal_sysfs.h 

// SPDX-FileCopyrightText: 2018 Frank Hunleth, Mark Sebald, Matt Ludwigs

//

// SPDX-License-Identifier: Apache-2.0



#ifndef HAL_SYSFS_H

#define HAL_SYSFS_H



#include <stdint.h>

#include "erl_nif.h"



struct sysfs_priv {

    ErlNifTid poller_tid;

    int pipe_fds[2];



#ifdef TARGET_RPI

    uint32_t *gpio_mem;

    int gpio_fd;

#endif

};



struct gpio_pin;



int sysfs_read_gpio(int fd);

void *gpio_poller_thread(void *arg);

int update_polling_thread(struct gpio_pin *pin);



#ifdef TARGET_RPI

ERL_NIF_TERM rpi_info(ErlNifEnv *env, struct sysfs_priv *priv, ERL_NIF_TERM info);

int rpi_load(struct sysfs_priv *priv);

void rpi_unload(struct sysfs_priv *priv);

int rpi_apply_pull_mode(struct gpio_pin *pin);

#endif



#endif // HAL_SYSFS_H