projects/microb2010/mainboard/robotsim.c

   1 /*
   2  *  Copyright Droids Corporation, Microb Technology, Eirbot (2005)
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  *  Revision : $Id: main.c,v 1.9.4.5 2007-06-01 09:37:22 zer0 Exp $
  19  *
  20  */
  21
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <stdint.h>
  25 #include <unistd.h>
  26 #include <sys/stat.h>
  27 #include <sys/types.h>
  28 #include <fcntl.h>
  29 #include <unistd.h>
  30
  31 #include <aversive.h>
  32 #include <aversive/error.h>
  33
  34 #include <timer.h>
  35 #include <scheduler.h>
  36 #include <time.h>
  37
  38 #include <ax12.h>
  39 #include <pwm_ng.h>
  40 #include <pid.h>
  41 #include <quadramp.h>
  42 #include <control_system_manager.h>
  43 #include <trajectory_manager.h>
  44 #include <blocking_detection_manager.h>
  45 #include <robot_system.h>
  46 #include <position_manager.h>
  47 #include <trajectory_manager_utils.h>
  48
  49 #include <parse.h>
  50 #include <rdline.h>
  51
  52 #include "../common/i2c_commands.h"
  53 #include "strat.h"
  54 #include "strat_utils.h"
  55 #include "main.h"
  56
  57 static int32_t l_pwm, r_pwm;
  58 static int32_t l_enc, r_enc;
  59
  60 static int fdr, fdw;
  61 /*
  62  * Debug with GDB:
  63  *
  64  * (gdb) handle SIGUSR1 pass
  65  * Signal        Stop   Print   Pass to program Description
  66  * SIGUSR1       Yes    Yes     Yes             User defined signal 1
  67  * (gdb) handle SIGUSR2 pass
  68  * Signal        Stop   Print   Pass to program Description
  69  * SIGUSR2       Yes    Yes     Yes             User defined signal 2
  70  * (gdb) handle SIGUSR1 noprint
  71  * Signal        Stop   Print   Pass to program Description
  72  * SIGUSR1       No     No      Yes             User defined signal 1
  73  * (gdb) handle SIGUSR2 noprint
  74  */
  75
  76 /* */
  77 #define FILTER  98
  78 #define FILTER2 (100-FILTER)
  79 #define SHIFT   4
  80
  81 void robotsim_dump(void)
  82 {
  83         char buf[BUFSIZ];
  84         int len;
  85         int16_t x, y, a;
  86
  87         x = position_get_x_s16(&mainboard.pos);
  88         y = position_get_y_s16(&mainboard.pos);
  89         a = position_get_a_deg_s16(&mainboard.pos);
  90 /*      y = COLOR_Y(y); */
  91 /*      a = COLOR_A(a); */
  92
  93         len = snprintf(buf, sizeof(buf), "pos=%d,%d,%d\n",
  94                        x, y, a);
  95         hostsim_lock();
  96         write(fdw, buf, len);
  97         hostsim_unlock();
  98 }
  99
 100 static int8_t
 101 robotsim_i2c_ballboard_set_mode(struct i2c_cmd_ballboard_set_mode *cmd)
 102 {
 103         char buf[BUFSIZ];
 104         int len;
 105
 106         ballboard.mode = cmd->mode;
 107         len = snprintf(buf, sizeof(buf), "ballboard=%d\n", cmd->mode);
 108         hostsim_lock();
 109         write(fdw, buf, len);
 110         hostsim_unlock();
 111         return 0;
 112 }
 113
 114 int8_t
 115 robotsim_i2c_cobboard_set_spickles(uint8_t side, uint8_t flags)
 116 {
 117         char buf[BUFSIZ];
 118         int len;
 119
 120         if (side == I2C_LEFT_SIDE) {
 121                 if (cobboard.lspickle == flags)
 122                         return 0;
 123                 else
 124                         cobboard.lspickle = flags;
 125         }
 126         if (side == I2C_RIGHT_SIDE) {
 127                 if (cobboard.rspickle == flags)
 128                         return 0;
 129                 else
 130                         cobboard.rspickle = flags;
 131         }
 132
 133         len = snprintf(buf, sizeof(buf), "cobboard=%d,%d\n", side, flags);
 134         hostsim_lock();
 135         write(fdw, buf, len);
 136         hostsim_unlock();
 137         return 0;
 138 }
 139
 140 static int8_t
 141 robotsim_i2c_ballboard(uint8_t addr, uint8_t *buf, uint8_t size)
 142 {
 143         void *void_cmd = buf;
 144
 145         switch (buf[0]) {
 146         case I2C_CMD_BALLBOARD_SET_MODE:
 147                 {
 148                         struct i2c_cmd_ballboard_set_mode *cmd = void_cmd;
 149                         robotsim_i2c_ballboard_set_mode(cmd);
 150                         break;
 151                 }
 152
 153         default:
 154                 break;
 155         }
 156         return 0;
 157 }
 158
 159 static int8_t
 160 robotsim_i2c_cobboard(uint8_t addr, uint8_t *buf, uint8_t size)
 161 {
 162         //      void *void_cmd = buf;
 163
 164         switch (buf[0]) {
 165 #if 0 /* deleted */
 166         case I2C_CMD_COBBOARD_SET_MODE:
 167                 {
 168                         struct i2c_cmd_cobboard_set_mode *cmd = void_cmd;
 169                         robotsim_i2c_cobboard_set_mode(cmd);
 170                         break;
 171                 }
 172 #endif
 173         default:
 174                 break;
 175         }
 176         return 0;
 177 }
 178
 179 int8_t
 180 robotsim_i2c(uint8_t addr, uint8_t *buf, uint8_t size)
 181 {
 182         if (addr == I2C_BALLBOARD_ADDR)
 183                 return robotsim_i2c_ballboard(addr, buf, size);
 184         else if (addr == I2C_COBBOARD_ADDR)
 185                 return robotsim_i2c_cobboard(addr, buf, size);
 186         return 0;
 187 }
 188
 189 /* must be called periodically */
 190 void robotsim_update(void)
 191 {
 192         static int32_t l_pwm_shift[SHIFT];
 193         static int32_t r_pwm_shift[SHIFT];
 194         static int32_t l_speed, r_speed;
 195         static unsigned i = 0;
 196         static unsigned cpt = 0;
 197
 198         uint8_t flags;
 199         int32_t local_l_pwm, local_r_pwm;
 200         double x, y, a, a2, d;
 201         char cmd[BUFSIZ];
 202         int n, pertl = 0, pertr = 0;
 203
 204         /* corners of the robot */
 205         double xfl, yfl; /* front left */
 206         double xrl, yrl; /* rear left */
 207         double xrr, yrr; /* rear right */
 208         double xfr, yfr; /* front right */
 209
 210         int oppx, oppy;
 211         double oppa, oppd;
 212
 213         /* time shift the command */
 214         l_pwm_shift[i] = l_pwm;
 215         r_pwm_shift[i] = r_pwm;
 216         i ++;
 217         i %= SHIFT;
 218         local_l_pwm = l_pwm_shift[i];
 219         local_r_pwm = r_pwm_shift[i];
 220
 221         /* read command */
 222         if (((cpt ++) & 0x7) == 0) {
 223                 n = read(fdr, &cmd, BUFSIZ - 1);
 224                 if (n < 1)
 225                         n = 0;
 226                 cmd[n] = 0;
 227         }
 228
 229         /* perturbation */
 230         if (cmd[0] == 'l')
 231                 pertl = 1;
 232         else if (cmd[0] == 'r')
 233                 pertr = 1;
 234         if (cmd[0] == 'o') {
 235                 if (sscanf(cmd, "opp %d %d", &oppx, &oppy) == 2) {
 236                         abs_xy_to_rel_da(oppx, oppy, &oppd, &oppa);
 237                         IRQ_LOCK(flags);
 238                         beaconboard.oppx = oppx;
 239                         beaconboard.oppy = oppy;
 240                         beaconboard.oppa = DEG(oppa);
 241                         if (beaconboard.oppa < 0)
 242                                 beaconboard.oppa += 360;
 243                         beaconboard.oppd = oppd;
 244                         IRQ_UNLOCK(flags);
 245                 }
 246         }
 247
 248         x = position_get_x_double(&mainboard.pos);
 249         y = position_get_y_double(&mainboard.pos);
 250         a = position_get_a_rad_double(&mainboard.pos);
 251
 252         l_speed = ((l_speed * FILTER) / 100) +
 253                 ((local_l_pwm * 1000 * FILTER2)/1000);
 254         r_speed = ((r_speed * FILTER) / 100) +
 255                 ((local_r_pwm * 1000 * FILTER2)/1000);
 256
 257         /* basic collision detection */
 258         a2 = atan2(ROBOT_WIDTH/2, ROBOT_HALF_LENGTH_REAR);
 259         d = norm(ROBOT_WIDTH/2, ROBOT_HALF_LENGTH_REAR);
 260
 261         xfl = x + cos(a+a2) * d;
 262         yfl = y + sin(a+a2) * d;
 263         if (!is_in_area(xfl, yfl, 0) && l_speed > 0)
 264                 l_speed = 0;
 265
 266         xrl = x + cos(a+M_PI-a2) * d;
 267         yrl = y + sin(a+M_PI-a2) * d;
 268         if (!is_in_area(xrl, yrl, 0) && l_speed < 0)
 269                 l_speed = 0;
 270
 271         xrr = x + cos(a+M_PI+a2) * d;
 272         yrr = y + sin(a+M_PI+a2) * d;
 273         if (!is_in_area(xrr, yrr, 0) && r_speed < 0)
 274                 r_speed = 0;
 275
 276         xfr = x + cos(a-a2) * d;
 277         yfr = y + sin(a-a2) * d;
 278         if (!is_in_area(xfr, yfr, 0) && r_speed > 0)
 279                 r_speed = 0;
 280
 281         if (pertl)
 282                 l_enc += 5000; /* push 1 cm */
 283         if (pertr)
 284                 r_enc += 5000; /* push 1 cm */
 285
 286         /* XXX should lock */
 287         l_enc += (l_speed / 1000);
 288         r_enc += (r_speed / 1000);
 289 }
 290
 291 void robotsim_pwm(void *arg, int32_t val)
 292 {
 293         //      printf("%p, %d\n", arg, val);
 294         if (arg == LEFT_PWM)
 295                 l_pwm = (val / 1.55);
 296         else if (arg == RIGHT_PWM)
 297                 r_pwm = (val / 1.55);
 298 }
 299
 300 int32_t robotsim_encoder_get(void *arg)
 301 {
 302         if (arg == LEFT_ENCODER)
 303                 return l_enc;
 304         else if (arg == RIGHT_ENCODER)
 305                 return r_enc;
 306         return 0;
 307 }
 308
 309 int robotsim_init(void)
 310 {
 311         mkfifo("/tmp/.robot_sim2dis", 0600);
 312         mkfifo("/tmp/.robot_dis2sim", 0600);
 313         fdw = open("/tmp/.robot_sim2dis", O_WRONLY, 0);
 314         if (fdw < 0)
 315                 return -1;
 316         fdr = open("/tmp/.robot_dis2sim", O_RDONLY | O_NONBLOCK, 0);
 317         if (fdr < 0) {
 318                 close(fdw);
 319                 return -1;
 320         }
 321         return 0;
 322 }