ibmcom3.h

来自「采用51单片机编写的gps接收和解析源代码」· C头文件 代码 · 共 24 行

#define STOP_BIT_1      1               /* 1 Stop bit */
#define STOP_BIT_2      2               /* 2 Stop bits */

#define COM_NONE        0               /* 8 data bits, no parity */
#define COM_EVEN        1               /* 7 data bits, even parity */
#define COM_ODD         2               /* 7 data bits, odd parity */

extern  int  com_install(int portnum);
extern  void com_deinstall(void);
extern  void com_set_speed(long speed);
extern  void com_set_parity(enum par_code parity, int stop_bits);
extern  void com_lower_dtr(void);
extern  void com_raise_dtr(void);
extern  void com_tx(char c);
extern  void com_tx_string(char *s);
extern  char com_rx(void);
extern  int  com_tx_ready(void);
extern  int  com_tx_empty(void);
extern  int  com_rx_empty(void);
extern  void com_flush_tx(void);
extern  void com_flush_rx(void);
extern  int  com_carrier(void);