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#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <termios.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/time.h>
/* command codes from pc to board: */
#define DGT_SEND_RESET 0x40 /* reset */
#define DGT_SEND_CLK 0x41 /* query clock */
#define DGT_SEND_BRD 0x42 /* dump entire board */
#define DGT_SEND_UPDATE 0x43 /* update when moved */
#define DGT_SEND_UPDATE_BRD 0x44 /* update board only when moved */
#define DGT_SEND_SERIALNR 0x45 /* send serial number */
#define DGT_SEND_TRADEMARK 0x47 /* send trademark notice */
#define DGT_SEND_EE_MOVES 0x49 /* send EE prom contents */
#define DGT_SEND_VERSION 0x4d /* send version identification */
#define DGT_SEND_UPDATE_NICE 0x4b /* update board & time when it changes */
/* command codes from board to pc: */
#define DGT_NONE 0x00
#define DGT_BOARD_DUMP 0x06
#define DGT_BWTIME 0x0d
#define DGT_FIELD_UPDATE 0x0e
#define DGT_EE_MOVES 0x0f
#define DGT_BUSADRES 0x10
#define DGT_SERIALNR 0x11
#define DGT_TRADEMARK 0x12
#define DGT_VERSION 0x13
#define Rank(x) (((x)>>3)&7)
#define File(x) ((x)&7)
typedef enum {FILEA, FILEB, FILEC, FILED, FILEE, FILEF, FILEG, FILEH} files;
typedef enum {RANK1, RANK2, RANK3, RANK4, RANK5, RANK6, RANK7, RANK8} ranks;
typedef enum {empty=0, pawn=1, knight=2, king=3,
bishop=5, rook=6, queen=7} PIECE;
typedef enum { A1,B1,C1,D1,E1,F1,G1,H1,
A2,B2,C2,D2,E2,F2,G2,H2,
A3,B3,C3,D3,E3,F3,G3,H3,
A4,B4,C4,D4,E4,F4,G4,H4,
A5,B5,C5,D5,E5,F5,G5,H5,
A6,B6,C6,D6,E6,F6,G6,H6,
A7,B7,C7,D7,E7,F7,G7,H7,
A8,B8,C8,D8,E8,F8,G8,H8,
BAD_SQUARE } squares;
int delay=500000;
int rotated=0;
int wtm=1;
int send_white=1, wtime;
int send_black=1, btime;
char w_piece_names[8] = { ' ','P','N','K',' ','B','R','Q'};
char b_piece_names[8] = { ' ','p','n','k',' ','b','r','q'};
int board[64], current_board[64];
/* last modified 11/19/98 */
/*
********************************************************************************
* *
* main() sets things up by initializing the DGT board and then goes into an *
* infinite loop processing input from stdin/dgt board. *
* *
********************************************************************************
*/
int main(int argc, char* argv[]) {
int CheckForMove(int*, int*);
int DGTInit(int, char**);
void CMDRead(int);
int DGTRead(int);
fd_set readfds;
struct timeval tv;
int tty, result, i;
tty=DGTInit(argc, argv);
if (!tty) {
printf("error tty could not be initialized\n");
fflush(stdout);
exit(0);
}
while (1) {
FD_ZERO (&readfds);
FD_SET (tty, &readfds);
FD_SET (fileno(stdin), &readfds);
tv.tv_sec=0;
tv.tv_usec=delay;
result=select(32, &readfds, 0, 0, &tv);
if (result == 0) {
result=CheckForMove(board,current_board);
if (result) for (i=0;i<64;i++) board[i]=current_board[i];
}
else {
if (FD_ISSET(tty, &readfds)) DGTRead(tty);
if (FD_ISSET(fileno(stdin), &readfds)) CMDRead(tty);
}
}
return(0);
}
unsigned int ReadClock() {
struct timeval timeval;
struct timezone timezone;
gettimeofday(&timeval, &timezone);
return(timeval.tv_sec*100+(timeval.tv_usec/10000));
}
void DelayTime(int ms)
{
int old,new;
old=ReadClock();
do {
new=ReadClock();
} while (new-ms/10 < old);
}
/* last modified 11/19/98 */
/*
********************************************************************************
* *
* DGTInit() sets up the local data for the DGT electronic chessboard and *
* initializes the communication port connected to it. *
* *
********************************************************************************
*/
int DGTInit(int argc, char *argv[]) {
int DGTSetPort(char*);
int tty;
tty=DGTSetPort(argv[1]);
if (!tty) return(0);
if (argv[2][1] == 'a') {
send_white=1;
send_black=1;
}
else if (argv[2][1] == 'w') {
send_white=1;
send_black=0;
}
else if (argv[2][1] == 'b') {
send_white=0;
send_black=1;
}
if (argv[2][0] == 'l') {
printf("info board initialized, clock to white's left.\n");
rotated=0;
}
else {
printf("info board initialized, clock to white's right.\n");
rotated=1;
}
if (send_white && send_black)
printf("info board in analysis mode\n");
else if (send_white)
printf("info board sending white moves.\n");
else if (send_black)
printf("info board sending black moves.\n");
if (argc > 3) {
delay=atoi(argv[3]);
printf("info delay set to %d microseconds\n",delay);
}
fflush(stdout);
return(tty);
}
/* last modified 11/19/98 */
/*
********************************************************************************
* *
* CMDRead() reads data from stdin (connected to Crafty) and handles the *
* various requests that Crafty sends. *
* *
********************************************************************************
*/
void CMDRead(int tty) {
char *nl, buffer[128], *cmd, command;
int bytes;
bytes=read(fileno(stdin),buffer,128);
buffer[bytes]=0;
cmd=buffer;
while (cmd < buffer+bytes) {
nl=strchr(cmd,'\n');
if (nl) *nl=0;
else nl=buffer+999;
if (strstr(cmd,"time")) {
if (send_white) {
printf("command time %d\n",btime*100);
printf("command otim %d\n",wtime*100);
}
else {
printf("command time %d\n",wtime*100);
printf("command otim %d\n",btime*100);
}
}
else if (strstr(cmd,"trade")) {
command=DGT_SEND_TRADEMARK;
write(tty,&command,1);
}
else if (strstr(cmd,"reset")) {
command=DGT_SEND_RESET;
write(tty,&command,1);
}
else if (strstr(cmd,"update")) {
command=DGT_SEND_UPDATE_NICE;
write(tty,&command,1);
}
else if (strstr(cmd,"set")) {
command=DGT_SEND_BRD;
write(tty,&command,1);
}
else if (strstr(cmd,"exit")) {
exit(0);
}
cmd=nl+1;
}
}
/* last modified 11/19/98 */
/*
********************************************************************************
* *
* DGTRead() reads data from the tty port connected to the DGT electronic *
* chess board and handles all data from that device. *
* *
********************************************************************************
*/
int DGTRead(int tty) {
unsigned int cmd, len, bytes;
int i, j, retval=0;
unsigned char buffer[512], buf[512];
char *ToFEN(int*);
int sq_nor[64] = {56,57,58,59,60,61,62,63,
48,49,50,51,52,53,54,55,
40,41,42,43,44,45,46,47,
32,33,34,35,36,37,38,39,
24,25,26,27,28,29,30,31,
16,17,18,19,20,21,22,23,
8, 9,10,11,12,13,14,15,
0, 1, 2, 3, 4, 5, 6, 7 };
int sq_rot[64] = { 7, 6, 5, 4, 3, 2, 1, 0,
15,14,13,12,11,10, 9, 8,
23,22,21,20,19,18,17,16,
31,30,29,28,27,26,25,24,
39,38,37,36,35,34,33,32,
47,46,45,44,43,42,41,40,
55,54,53,52,51,50,49,48,
63,62,61,60,59,58,57,56 };
int *sq;
int pc[15] = {empty, pawn, rook, knight, bishop, king, queen,
-pawn,-rook,-knight,-bishop,-king,-queen};
/*
-------------------------------------------------
| |
| first, clear the buffer and then read in what- |
| ever data has arrived. |
| |
-------------------------------------------------
*/
sq=(rotated) ? sq_rot : sq_nor;
for (i=0;i<512;i++) buffer[i]=0;
bytes=read(tty,buffer,1);
if (!(buffer[0]&128)) {
printf("info skipping non-command character %x\n",buffer[0]);
fflush(stdout);
return(0);
}
bytes=1;
while (bytes < 3) bytes+=read(tty,buffer+bytes,512-bytes);
len=(buffer[1]<<7)+buffer[2];
while (bytes < len) bytes+=read(tty,buffer+bytes,512-bytes);
for (i=0;i<bytes;) {
cmd=buffer[i]&127;
len=(buffer[i+1]<<7)+buffer[i+2];
i+=3;
if (i >= bytes) {
printf("error incomplete DGT message read\n");
fflush(stdout);
break;
}
switch (cmd) {
/*
-------------------------------------------------
| |
| no response (noop) from board. ignore this as |
| it means nothing. |
| |
-------------------------------------------------
*/
case DGT_NONE:
break;
/*
-------------------------------------------------
| |
| this handles a complete 64 square board dump |
| and sets the appropriate position on the |
| engine's internal board representation. |
| |
-------------------------------------------------
*/
case DGT_BOARD_DUMP:
for (j=0;j<64;j++) {
board[sq[j]]=pc[buffer[i+j]];
current_board[sq[j]]=pc[buffer[i+j]];
}
printf("command setboard %s\n",ToFEN(board));
fflush(stdout);
i+=len-3;
break;
/*
-------------------------------------------------
| |
| this handles a time update, which pops in one |
| per second. or whenever the button on top is |
| pressed after a move. |
| |
-------------------------------------------------
*/
case DGT_BWTIME:
for (j=0;j<6;j++) buffer[i+j]=(buffer[i+j]>>4)*10+(buffer[i+j]&15);
btime=(buffer[i]&15)*3600+buffer[i+1]*60+buffer[i+2];
wtime=(buffer[i+3]&15)*3600+buffer[i+4]*60+buffer[i+5];
if (!(buffer[i+6]&1)) printf("info clock stopped\n");
if (buffer[i+6]&2) wtm=1;
else wtm=0;
fflush(stdout);
i+=len-3;
break;
/*
-------------------------------------------------
| |
| this handles a square (field) change. when a |
| piece is picked up or set down, the square |
| that was changed is sent along with the type |
| of piece (or empty) that is now on it. |
| |
-------------------------------------------------
*/
case DGT_FIELD_UPDATE:
current_board[sq[buffer[i]]]=pc[buffer[i+1]];
i+=len-3;
break;
/*
-------------------------------------------------
| |
| this handles the EE prom dump. currently not |
| used in Crafty. |
| |
-------------------------------------------------
*/
case DGT_EE_MOVES:
break;
/*
-------------------------------------------------
| |
| this handles the serial number message from |
| the board. |
| |
-------------------------------------------------
*/
case DGT_SERIALNR:
printf("info DGT nserial number: ");
for (j=0;j<len-3;j++) printf("%c",buffer[i+j]);
printf("\n");
fflush(stdout);
i+=len-3;
break;
/*
-------------------------------------------------
| |
| this handles the trademark message from the |
| board. |
| |
-------------------------------------------------
*/
case DGT_TRADEMARK:
printf("info ");
buf[0]=0;
for (j=0;j<len-3;j++) {
sprintf(buf+strlen(buf),"%c",buffer[i+j]);
if (buffer[i+j] == '\n') sprintf(buf+strlen(buf),"info ");
}
sprintf(buf+strlen(buf),"\n");
printf("%s",buf);
fflush(stdout);
i+=len-3;
break;
/*
-------------------------------------------------
| |
| this handles the version id message from the |
| board. |
| |
-------------------------------------------------
*/
case DGT_VERSION:
printf("info version:%2d.%02d\n",buffer[i],buffer[i+1]);
fflush(stdout);
i+=len-3;
break;
default:
printf("error unknown response from DGT sensory board (%x)\n",cmd);
fflush(stdout);
}
}
return(retval);
}
/* last modified 11/19/98 */
/*
********************************************************************************
* *
* DGTSetPort() sets the tty port to the proper baud rate, parity, start/stop *
* bits and character size. *
* *
********************************************************************************
*/
int DGTSetPort(char *ttyname) {
struct termios trm;
int set, retval, tty;
printf("info initializing device %s\n",ttyname);
fflush(stdout);
tty=open(ttyname,O_RDWR | O_NOCTTY);
if (tty < 0) {
printf("error unable to open %s\n",ttyname);
fflush(stdout);
return(-1);
}
ioctl(tty, TIOCMGET, &set);
set|=TIOCM_DTR; /* DTR high */
ioctl(tty, TIOCMSET, &set);
tcflush(tty, TCIOFLUSH); /* flush buffers */
retval=tcgetattr (tty, &trm);
cfsetispeed(&trm, B9600); /* input speed 9600 */
cfsetospeed(&trm, B9600); /* output speed 9600 */
cfmakeraw(&trm); /* raw input/output mode */
retval=tcsetattr(tty, TCSANOW, &trm);
if (retval < 0) {
printf("error unable to set up I/O port\n");
fflush(stdout);
return(0);
}
return(tty);
}
/* last modified 11/19/98 */
/*
********************************************************************************
* *
* ToFEN() converts the current position to a FEN string for Crafty. *
* *
********************************************************************************
*/
char *ToFEN(int board[64]) {
char xlate[15]={'q','r','b',0,'k','n','p',0,'P','N','K',0,'B','R','Q'};
char empty[9]={' ','1','2','3','4','5','6','7','8'};
int rank, file, nempty;
static char fen_string[128];
fen_string[0]=0;
for (rank=RANK8;rank>=RANK1;rank--) {
nempty=0;
for (file=FILEA;file<=FILEH;file++) {
if (board[(rank<<3)+file]) {
if (nempty) {
sprintf(fen_string+strlen(fen_string),"%c",
empty[nempty]);
nempty=0;
}
sprintf(fen_string+strlen(fen_string),"%c",
xlate[board[(rank<<3)+file]+7]);
}
else nempty++;
}
sprintf(fen_string+strlen(fen_string),"%c",'/');
}
if (wtm)
sprintf(fen_string+strlen(fen_string)," w ");
else
sprintf(fen_string+strlen(fen_string)," b ");
if (board[E1]==king) {
if (board[H1]==rook)
sprintf(fen_string+strlen(fen_string),"K");
if (board[A1]==rook)
sprintf(fen_string+strlen(fen_string),"Q");
}
if (board[E8]==-king) {
if (board[H8]==-rook)
sprintf(fen_string+strlen(fen_string),"k");
if (board[A8]==-rook)
sprintf(fen_string+strlen(fen_string),"q");
}
return (fen_string);
}
/* last modified 11/19/98 */
/*
********************************************************************************
* *
* CheckForMove() compares the current board to the original board position *
* to determine if a move has been completed. *
* *
********************************************************************************
*/
int CheckForMove(int board[64], int current_board[64]) {
int diff[64], num=0, sq;
/*
-------------------------------------------------
| |
| if no more than one square has changed, this |
| can't be a move. |
| |
-------------------------------------------------
*/
if ((wtm&&!send_white) || (!wtm&&!send_black)) return(1);
for (sq=0;sq<64;sq++)
if (board[sq] != current_board[sq])
diff[num++]=sq;
if (num <= 1) return(0);
/*
-------------------------------------------------
| |
| ok, we might have a move since at least two |
| squares have changed. we have to handle four |
| special cases: (1) normal move where only |
| two squares change and move is not a pawn |
| promotion. (2) pawn promotion. (3) castle |
| which requires two piece moves to complete. |
| (4) enpassant pawn capture where 3 squares |
| change. |
| |
| the first/second case is a normal move which |
| include a pawn promotion (ie moves that change |
| exactly two squares only). |
| |
-------------------------------------------------
*/
if (num == 2) {
int from, to, moving, captured;
if (current_board[diff[0]]==0 && current_board[diff[1]]==0) return(0);
if (board[diff[0]] && !current_board[diff[0]]){
from=diff[0];
to=diff[1];
}
else {
from=diff[1];
to=diff[0];
}
moving=abs(board[from]);
captured=abs(board[to]);
/* castle move? */
if (moving==king && abs(from-to)==2) return(0);
/* en passant move? */
if (moving==pawn && abs(to-from)!=8 && abs(to-from)!=16 &&
(board[to]==0 || abs(from-to)==1)) return(0);
if (moving == pawn) {
if (Rank(to)!=0 && Rank(to)!=7)
printf("move %c%c%c%c\n",'a'+File(from),'1'+Rank(from),
'a'+File(to),'1'+Rank(to));
else
printf("move %c%c%c%c=%c\n",'a'+File(from),'1'+Rank(from),
'a'+File(to),'1'+Rank(to),
w_piece_names[current_board[to]]);
}
else
printf("move %c%c%c%c\n",'a'+File(from),'1'+Rank(from),
'a'+File(to),'1'+Rank(to));
fflush(stdout);
return(1);
}
/*
-------------------------------------------------
| |
| the third case is enpassant pawn captures |
| which changes three squares. |
| |
-------------------------------------------------
*/
if (num == 3) {
int i, from=-1, to=-1;
for (i=0;i<3;i++) if (current_board[diff[i]]) to=diff[i];
if (abs(current_board[to]) != pawn) return(0);
for (i=0;i<3;i++) if (abs(to-diff[i])==7 || abs(to-diff[i])==9) from=diff[i];
printf("move %c%c%c%c\n",'a'+File(from),'1'+Rank(from),
'a'+File(to),'1'+Rank(to));
fflush(stdout);
return(1);
}
/*
-------------------------------------------------
| |
| the third case is enpassant pawn captures |
| which changes three squares. |
| |
-------------------------------------------------
*/
if (num == 3) {
int i, from, to;
for (i=0;i<3;i++) if (current_board[diff[i]]) to=diff[i];
if (abs(current_board[to]) != pawn) return(0);
for (i=0;i<3;i++) if (abs(to-diff[i])==7 || abs(to-diff[i])==9) from=diff[i];
printf("move %c%c%c%c\n",'a'+File(from),'1'+Rank(from),
'a'+File(to),'1'+Rank(to));
fflush(stdout);
return(1);
}
/*
-------------------------------------------------
| |
| the fourth case is castling where both a king |
| and rook move. |
| |
-------------------------------------------------
*/
if (num == 4) {
int i, kfrom=-1, kto=-1, rfrom=-1, rto=-1;
for (i=0;i<num;i++) {
if (abs(board[diff[i]])==king &&
current_board[diff[i]]==empty) kfrom=diff[i];
if (board[diff[i]]==empty &&
abs(current_board[diff[i]])==king) kto=diff[i];
if (abs(board[diff[i]])==rook &&
current_board[diff[i]]==empty) rfrom=diff[i];
if (board[diff[i]]==empty &&
abs(current_board[diff[i]])==rook) rto=diff[i];
}
if (kfrom<0 || kto<0 || rfrom<0 || rto<0) {
printf("error restore position and retry move\n");
return(-1);
}
if (kto==G1 || kto==G8) printf("move O-O\n");
if (kto==C1 || kto==C8) printf("move O-O-O\n");
fflush(stdout);
}
return(1);
}
|