serial.h

使用8880实现DTMF通信及拨号的程序.

#define RECV_BUFLEN	  50
#define SEND_BUFLEN	  50
#define LINE_END_CHAR	  '\r'
typedef struct tagSERIAL_PORT_STATUS{
	   char *read_start_ptr;
	   char *read_end_ptr;
	   char *recv_cur_ptr;
	   char *send_cur_ptr;
	   char sending;
}SERIAL_PORT_STATUS,*PSERIAL_PORT_STATUS;

void serial_send(char *buf);
unsigned int serial_recv(char *buf,unsigned int buflen);
void uart0_init(void);