/*==========================*/
/*本程序由sunny編寫，如有傳載*/
/*請注明http://sunny1979.icpcn.com */
/*或者http://tchome.icpcn.com??*/
#include <dos.h>
#include <bios.h>
#include <stdio.h>
#include <math.h>
#include <conio.h>
#include <graphics.h>
#ifdef __cplusplus
????#define __CPPARGS ...
#else
????#define __CPPARGS
#endif
#define SER_RBF????????0???
#define SER_THR????????0???
#define SER_IER????????1????
#define SER_IIR????????2????
#define SER_LCR????????3???
#define SER_MCR????????4????
#define SER_LSR????????5????
#define SER_MSR????????6????
#define SER_DLL????????0????
#define SER_DLH????????1????
#define SER_BAUD_1200??96???
#define SER_BAUD_2400??48
#define SER_BAUD_9600??12
#define SER_BAUD_19200??6
#define SER_GP02????????8?????
#define COM_1???????????0x3F8
#define COM_2???????????0x2F8 /*/ base port address of port 1*/
#define SER_STOP_1??????0?????/*/ 1 stop bit per character*/
#define SER_STOP_2??????4?????/*/ 2 stop bits per character*/
#define SER_BITS_5??????0?????/*/ send 5 bit characters*/
#define SER_BITS_6??????1?????/*/ send 6 bit characters*/
#define SER_BITS_7??????2?????/*/ send 7 bit characters*/
#define SER_BITS_8??????3?????/*/ send 8 bit characters*/
#define SER_PARITY_NONE 0?????/*/ no parity*/
#define SER_PARITY_ODD??8?????/*/ odd parity*/
#define SER_PARITY_EVEN 24????/*/ even parity*/
#define SER_DIV_LATCH_ON 128??/*/ used to turn reg 0,1 into divisor latch*/
#define PIC_IMR????0x21???/*/ pic's interrupt mask reg.*/
#define PIC_ICR????0x20???/*/ pic's interupt control reg.*/
#define INT_SER_PORT_0????0x0C??/*/ port 0 interrupt com 1 & 3*/
#define INT_SER_PORT_1????0x0B??/*/ port 0 interrupt com 2 & 4*/
#define SERIAL_BUFF_SIZE 128????/*/ current size of circulating receive buffer*/
void interrupt far (*Old_Isr)(__CPPARGS);??/*/ holds old com port interrupt handler*/
char ser_buffer[SERIAL_BUFF_SIZE];??/*/ the receive buffer*/
int ser_end = -1,ser_start=-1;??????/*/ indexes into receive buffer*/
int ser_ch, char_ready=0;???????????/*/ current character and ready flag*/
int old_int_mask;???????????????????/*/ the old interrupt mask on the PIC*/
int open_port;??????????????????????/*/ the currently open port*/
int serial_lock = 0;????????????????/*/ serial ISR semaphore so the buffer*/
????????/*/ isn't altered will it is being written*/
????????????????????????????????????/*/ to by the ISR*/
/*-------------寫串口-----------------*/??
void interrupt far Serial_Isr(__CPPARGS)
{
serial_lock = 1;
ser_ch = inp(open_port + SER_RBF);
if (++ser_end > SERIAL_BUFF_SIZE-1)
????ser_end = 0;
ser_buffer[ser_end] = ser_ch;
++char_ready;
outp(PIC_ICR,0x20);
serial_lock = 0;
}
int Ready_Serial()
{
return(char_ready);
}
/*--------------讀串口--------------*/
int Serial_Read()
{
int ch;
while(serial_lock){}
if (ser_end != ser_start)
???{
???if (++ser_start > SERIAL_BUFF_SIZE-1)
???????ser_start = 0;
???ch = ser_buffer[ser_start];
??if (char_ready > 0)
???????--char_ready;
???return(ch);
???}
else
???return(0);
}
/*--------------寫串口-----------------*/
Serial_Write(char ch)
{
while(!(inp(open_port + SER_LSR) & 0x20)){}
asm cli
outp(open_port + SER_THR, ch);
asm sti
}
/*-----------初始化串口---------------*/
Open_Serial(int port_base, int baud, int configuration)
{
open_port = port_base;
outp(port_base + SER_LCR, SER_DIV_LATCH_ON);
outp(port_base + SER_DLL, baud);
outp(port_base + SER_DLH, 0);
outp(port_base + SER_LCR, configuration);
outp(port_base + SER_MCR, SER_GP02);
outp(port_base + SER_IER, 1);
if (port_base == COM_1)
???{
???Old_Isr = _dos_getvect(INT_SER_PORT_0);
???_dos_setvect(INT_SER_PORT_0, Serial_Isr);
???printf("\nOpening Communications Channel Com Port #1...\n");
???}
else
???{
???Old_Isr = _dos_getvect(INT_SER_PORT_1);
???_dos_setvect(INT_SER_PORT_1, Serial_Isr);
???printf("\nOpening Communications Channel Com Port #2...\n");
???}
old_int_mask = inp(PIC_IMR);
outp(PIC_IMR, (port_base==COM_1) ? (old_int_mask & 0xEF) : (old_int_mask & 0xF7 ));
}
/*-------------關(guān)閉串口--------------*/
Close_Serial(int port_base)
{
outp(port_base + SER_MCR, 0);
outp(port_base + SER_IER, 0);
outp(PIC_IMR, old_int_mask );
if (port_base == COM_1)
???{
???_dos_setvect(INT_SER_PORT_0, Old_Isr);
???printf("\nClosing Communications Channel Com Port #1.\n");
???}
else
???{
???_dos_setvect(INT_SER_PORT_1, Old_Isr);
???printf("\nClosing Communications Channel Com Port #2.\n");
???}
}
/*-------------發(fā)送應(yīng)用----------------*/
void main(int argc,char *argv[])
{
char ch,press;
int done=0;
FILE *fp;
argc=2;
argv[1]="test.cpp";
if(argc<2)
{
??printf("\nUsage:display filename.wav!!!");
??exit(0);
}
if((fp=fopen(argv[1],"r+b"))==NULL)
{
??printf("cannot open the file\n");
??exit(0);
}
fseek(fp, 0, SEEK_SET);
Open_Serial(COM_1,SER_BAUD_9600,SER_PARITY_NONE | SER_BITS_8 | SER_STOP_1);
printf("press any key to begin sending");
getch();
Serial_Write(' ');
while(!done&&ch != EOF)
?????{
ch = fgetc(fp);
if(ch==EOF) Serial_Write(27);
Serial_Write(ch);
if (kbhit())
{
??press=getch();
??if (press==27)
??{
???Serial_Write(27);
???done=1;
??}
}
?????}??
Close_Serial(COM_1);
fclose(fp);
}
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