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#include <termios.h>
extern int serial_errno;
extern char *serial_errnostr;
typedef struct _serial {
/* parameters */
const char *device;
int baud;
int databits;
char parity;
int stopbits;
char xonxoff;
char rtscts;
float txtimeout;
float rxtimeout;
/* internal variables */
int handle;
struct termios com_termios;
struct termios old_termios;
} serial_t;
serial_t *serial_open(const char *serial_device, int serial_baud, int serial_databits, char serial_parity, int serial_stopbits, char serial_xonxoff, char serial_rtscts, int serial_getbreak, float serial_txtimeout, float serial_rxtimeout);
void serial_close(serial_t *serial);
int serial_read(serial_t *serial, uint8_t *buffer, int size);
int serial_write(serial_t *serial, uint8_t *buffer, int size);
int serial_timeout(serial_t *serial, double serial_txtimeout, double serial_rxtimeout);
int serial_cts(serial_t *serial);
int serial_dsr(serial_t *serial);
int serial_dtron(serial_t *serial);
int serial_dtroff(serial_t *serial);
int serial_rtson(serial_t *serial);
int serial_rtsoff(serial_t *serial);
int serial_break(serial_t *serial, int on);
int serial_handle(serial_t *serial);
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