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/*

 * Project: S.Ha.R.K.

 *

 * Coordinators:

 *   Giorgio Buttazzo    <giorgio@sssup.it>

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *

 * Authors     :

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *   (see the web pages for full authors list)

 *

 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)

 *

 * http://www.sssup.it

 * http://retis.sssup.it

 * http://shark.sssup.it

 */

/*

 * Copyright (C) 2000 Giorgio Buttazzo, Paolo Gai

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 *

 * CVS :        $Id: cabs.c,v 1.2 2002-10-28 08:11:29 pj Exp $

 */

/*--------------------------------------------------------------*/

/*                    TEST ON CABS                              */

/*--------------------------------------------------------------*/

#include <kernel/kern.h>

#include <modules/cabs.h>

#include <drivers/glib.h>

#include <drivers/keyb.h>

#include <string.h>

#define NCAB    4               /* max number of CABs   */

#define NCAR    26              /* generated characters */

#define YP      32              /* level of arrows      */

#define R       20              /* task radius          */

#define YY      (YP+R+32)       /* level of writing     */

#define DELTA   (2*R+72)        /* total channel hight  */

#define X1      120             /* start column for P1  */

#define X2      360             /* start column for P2  */

#define XP1     (X1+64)         /* X position of task 1 */

#define XP2     (X2+64)         /* X position of task 2 */

#define XC      (XP1+96)        /* X position of CAB    */

#define L       52              /* CAB rectangle length */

void    my_exit(KEY_EVT *k);

void    draw_channel(int i);

void    create_channel(int i);

void    get_data();

TASK    producer(void *arg);

TASK    consumer(void *arg);

char    *cname[NCAB] = {"cab1", "cab2", "cab3", "cab4"};

char    *pname1[NCAB] = {"wr1", "wr2", "wr3", "wr4"};

char    *pname2[NCAB] = {"rd1", "rd2", "rd3", "rd4"};

CAB     cid[NCAB];              /* CAB identifiers      */

PID     p1[NCAB], p2[NCAB];     /* task identifiers     */

/* Task Periods */

TIME    t1[NCAB] = {200000, 100000, 300000, 800000};

TIME    t2[NCAB] = {400000, 400000, 150000, 200000};

/* Task WCETS */

TIME    w1[NCAB] = {10000, 10000, 10000, 10000};

TIME    w2[NCAB] = {10000, 10000, 10000, 10000};

/****************************************************************/

/* This is the exception handler. It is called when an exception

   is raised.

   It exits from the graphical mode, then it prints a message and

   shutdown the kernel using sys_abort()

*/

void demo_exc_handler(int signo, siginfo_t *info, void *extra)

{

  struct timespec t;

  grx_close();

  /* Default action for an kern exception is  */

  kern_cli();

  ll_gettime(TIME_EXACT, &t),

  cprintf("\nS.Ha.R.K. Exception raised!!!"

          "\nTime (s:ns)     :%ld:%ld"

          "\nException number:%d (numbers in include/bits/errno.h)"

          "\nPID             :%d\n",

          t.tv_sec, t.tv_nsec, info->si_value.sival_int,

          info->si_task);

  sys_abort(1);

}

/******************************************************************/

/* This function is called when Alt-X is pressed.

   It simply shutdown the system using sys_end.

   Note that the byebye() function is called only if we exit from

   the system using sys_end()!!!!

*/

void my_end(KEY_EVT* e)

{

        sys_end();

}

/******************************************************************/

/* This function is called when the system exit correctly after Alt-X.

   It exits from the graphic mode and then it prints a small greeting.

   Note that:

   - The function calls grx_exit, so it must be registered using

     RUNLEVEL_BEFORE_EXIT (RUNLEVEL_AFTER_EXIT does not work because

     at that point the kernel is already returned in real mode!!!)

   - When an exception is raised, the exception handler is called.

     Since the exception handler already exits from the graphic mode,

     this funcion has not to be called. For this reason:

     . we registered byebye using the flag NO_AT_ABORT

     . the exception handler exits using sys_abort; in that way byebye is

       NOT called

*/

/*--------------------------------------------------------------*/

/* User exit function                                           */

/*--------------------------------------------------------------*/

void byebye(void *arg)

{

  grx_close();

  cprintf("Bye Bye!\n");

}

/*--------------------------------------------------------------*/

/* Main task                                                    */

/*--------------------------------------------------------------*/

/****************************** MAIN ******************************/

int main(int argc, char **argv)

{

    struct sigaction action;

    char c = 0;         /* character from keyboard      */

    /* Init the standard S.Ha.R.K. exception handler */

    action.sa_flags = SA_SIGINFO;            /* Set the signal action */

    action.sa_sigaction = demo_exc_handler;

    action.sa_handler = 0;

    sigfillset(&action.sa_mask); /* we block all the other signals... */

    if (sigaction(SIGHEXC, &action, NULL) == -1) {  /* set the signal */

      perror("Error initializing signals...");

      sys_end();

    }

    /* Set the closing function */

    sys_atrunlevel(byebye, NULL, RUNLEVEL_BEFORE_EXIT|NO_AT_ABORT);

    /* graphic card Initialization */

    if (grx_init() < 1) {

       sys_abort(1);

    }

    if (grx_open(640, 480, 8) < 0) {

        cprintf("GRX Err\n");

        sys_abort(1);

    }

    grx_clear(BLACK);

    grx_text("Press a key [1-4]", 10, 16, 7, 0);

    grx_text("to create a pair",  10, 24, 7, 0);

    grx_text("ESC to exit demo",  10, 48, 7, 0);

    while (c != 27) {

      c = keyb_getch(BLOCK);

      if ((c >= '1') && (c <= '1'+NCAB-1))

        create_channel(c-'1');

    }

    sys_end();

    return 0;

}

/*--------------------------------------------------------------*/

/* write data in a cab                                          */

/*--------------------------------------------------------------*/

TASK    producer(void *arg)

{

int     i = (int)arg;

char    c;                      /* message character            */

char    *p;                     /* pointer to a cab buffer      */

char    s[2];                   /* string to display            */

int     k = 0;

int     x, y;

int     col = 13;

int     ybase = YY + i*DELTA;

        x = X1;

        y = ybase;

        s[1] = 0;

        k = 0;

        while (1) {

                c = 'A' + k;

                p = cab_reserve(cid[i]);

                *p = c;

                cab_putmes(cid[i], p);

                s[0] = c;

                k = (k + 1) % NCAR;

                grx_text(s,x,y,col,0);

                x += 8;

                if (x >= (X1 + NCAR*8)) {

                        x = X1;

                        y = y + 8;

                        if (y >= ybase+16) {

                                y = ybase;

                                col = col % 15 + 1;

                        }

                }

                task_endcycle();

        }

}

/*--------------------------------------------------------------*/

/* read data from a cab                                         */

/*--------------------------------------------------------------*/

TASK    consumer(void *arg)

{

int     i = (int)arg;

char    *p;

char    s[2];

int     x, y;

int     col = 13;

int     ybase = YY + i*DELTA;

        x = X2;

        y = ybase;

        s[1] = 0;

        while (1) {

                p = cab_getmes(cid[i]);

                s[0] = *p - 'A' + 'a';

                cab_unget(cid[i], p);

                grx_text(s,x,y,col,0);

                x += 8;

                if (x >= (X2 + NCAR*8)) {

                        x = X2;

                        y = y + 8;

                        if (y >= ybase+16) {

                                y = ybase;

                                col = col % 15 + 1;

                        }

                }

                task_endcycle();

        }

}

/*--------------------------------------------------------------*/

/* create the two tasks and a channel                           */

/*--------------------------------------------------------------*/

void    create_channel(int i)

{

        HARD_TASK_MODEL m;

        draw_channel(i);

        cid[i] = cab_create(cname[i], 1, 2);

        hard_task_default_model(m);

        hard_task_def_ctrl_jet (m);

        hard_task_def_arg      (m, (void *)i);

        hard_task_def_wcet     (m, w1[i]);

        hard_task_def_mit      (m, t1[i]);

        hard_task_def_usemath  (m);

        p1[i] = task_create(pname1[i], producer, &m, NULL);

        if (p1[i] == NIL) {

          grx_close();

          perror("Could not create task <producer>");

          sys_abort(1);

        }

        task_activate(p1[i]);

        hard_task_default_model(m);

        hard_task_def_ctrl_jet (m);

        hard_task_def_arg      (m, (void *)i);

        hard_task_def_wcet     (m, w2[i]);

        hard_task_def_mit      (m, t2[i]);

        hard_task_def_usemath  (m);

        p2[i] = task_create(pname2[i], consumer, &m, NULL);

        if (p2[i] == NIL) {

          grx_close();

          perror("Could not create task <consumer>");

          sys_abort(1);

        }

        task_activate(p2[i]);

}

/*--------------------------------------------------------------*/

/* Disegna i processi e il canale di comunicazione              */

/*--------------------------------------------------------------*/

void    draw_channel(int i)

{

char    buffer[32];                     /* buffer per sprintf   */

int     yc = YP + i*DELTA;              /* altezza del canale   */

        grx_circle(XP1,yc,R,2);

        grx_text("P1",XP1-8,yc-4,12,0);

        grx_circle(XP2,yc,R,2);

        grx_text("P2",XP2-8,yc-4,12,0);

        grx_rect(XC,yc-R,XC+L,yc+R,3);

        grx_text("CAB",XC+16,yc-4,12,0);

        grx_line(XP1+R,yc,XC,yc,4);

        grx_line(XC+L,yc,XP2-R,yc,4);

        grx_text("T1 =          ms",X1+40,yc+R+16,14,0);

        sprintf(buffer,"%ld", t1[i]);

        grx_text(buffer,X1+88,yc+R+16,14,0);

        grx_text("T2 =          ms",X2+40,yc+R+16,14,0);

        sprintf(buffer,"%ld", t2[i]);

        grx_text(buffer,X2+88,yc+R+16,14,0);

}

/*--------------------------------------------------------------*/