#include <iostream>
#include <fcntl.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>

// Status register bits
#define STATUS_DIR 0x80
#define STATUS_TSB 0x40
#define STATUS_SBR 0x20
#define STATUS_RST 0x10
#define STATUS_LL  0x08
#define STATUS_SD  0x04
#define STATUS_PPD 0x02
#define STATUS_1WB 0x01

class owadapter_ds2482 {
    private:
        int i2cdev;
        
        void i2c_write(std::string bytes);
        unsigned char owadapter_ds2482::i2c_readbyte();
    public:
        owadapter_ds2482(std::string device);
};

owadapter_ds2482::owadapter_ds2482(std::string device) {
    i2cdev = open(device.c_str(), O_RDWR);
    
    if (i2cdev < 0) {
        perror(device.c_str());
        exit(1);
    }
    
    ioctl(i2cdev, I2C_SLAVE, 0x18);
    
    i2c_write("\xF0"); // Device reset
    i2c_write("\xD2\xF0"); // Device config - standard speed, no pull-ups, no presence masking
    i2c_write("\xB4"); // 1 wire reset
    
    unsigned char status = i2c_readbyte();
    std::cout << "Status byte: 0x" << std::hex << status << std::endl;
}

void owadapter_ds2482::i2c_write(std::string bytes) {
    if (write(i2cdev, bytes.c_str(), bytes.length()) != bytes.length()) {
        perror("i2c_write");
    }
}

unsigned char owadapter_ds2482::i2c_readbyte() {
    unsigned char buf;
    read(i2cdev, &buf, 1);
    return buf;
}