#ifndef _BY_SERIAL_H__
#define _BY_SERIAL_H__

#define BY_SERIAL_DEV_STATUS_STDBY 0x00
#define BY_SERIAL_DEV_STATUS_ERROR 0xFF
#define BY_SERIAL_DEV_STATUS_OPEND 0x01

typedef struct by_serial_t {
  int fd;
  char dev_name_str[40];
  int dev_name_len;
  int dev_status;
} by_serial_t;

extern int by_serial_init(by_serial_t *serial_port, const char *dev_name);
extern int by_serial_set_baudrate(by_serial_t *serial_port, int baudrate);
extern int by_serial_set_parity(by_serial_t *serial_port, int databits, int stopbits, char parity);
extern int by_serial_write(by_serial_t *serial_port, const char *buff, const int len);
extern int by_serial_read(by_serial_t *serial_port, char *buff, const int len);
extern int by_serial_get_used_buffer_len(by_serial_t *serial_port);

#endif