GPIO.h

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/*
 * GPIO.h
 *
 * Copyright (c) 2024 Apra Labs
 *
 * This file is part of ApraUtils.
 *
 * Licensed under the MIT License.
 * See LICENSE file in the project root for full license information.
 */
 
#ifndef INCLUDES_APRA_GPIO_H_
#define INCLUDES_APRA_GPIO_H_
 
#include <sys/types.h>
#include <string>
 
#define SYS_GPIO_PATH "/sys/class/gpio"
 
enum GPIO_EDGES
{
    NONE, RISING, FALLING, BOTH
};
 
namespace apra
{
class GPIO
{
public:
    GPIO(uint gpioNo);
    virtual ~GPIO();
    bool Init(bool isRead);
    bool Init4EdgeInterrupt(bool isRead, GPIO_EDGES edge);
    bool UnInit();
    int Open();
    bool Close();
    int Read();
    int ReadWithInterrupt(unsigned long uSecTout);
    bool Write(bool makeHigh);
    int& GetGPIODescriptor();
    static int ReadOnce(uint gpioNo);
    static bool WriteOnce(uint gpioNo, bool makeHigh);
private:
    bool Export();
    bool SetDirection(bool isRead);
    bool SetGPIOEdgeEvent(GPIO_EDGES edge);
    bool UnExport();
    std::string GPIO_EDGES_STR(GPIO_EDGES edge);
 
    int m_fd;
    uint m_gpio;
    bool m_isRead;
};
}
 
#endif /* INCLUDES_APRA_GPIO_H_ */