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| Rev | Author | Line No. | Line |
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| 1331 | giacomo | 1 | |
| 2 | /* |
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| 3 | * Project: S.Ha.R.K. |
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| 4 | * |
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| 5 | * Coordinators: Giorgio Buttazzo <giorgio@sssup.it> |
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| 6 | * |
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| 7 | * Authors : Paolo Gai <pj@hartik.sssup.it> |
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| 8 | * (see authors.txt for full list of hartik's authors) |
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| 9 | * |
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| 10 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 11 | * |
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| 12 | * http://www.sssup.it |
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| 13 | * http://retis.sssup.it |
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| 14 | * http://shark.sssup.it |
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| 15 | */ |
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| 16 | |||
| 17 | /* |
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| 18 | * Copyright (C) 2000 Paolo Gai |
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| 19 | * |
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| 20 | * This program is free software; you can redistribute it and/or modify |
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| 21 | * it under the terms of the GNU General Public License as published by |
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| 22 | * the Free Software Foundation; either version 2 of the License, or |
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| 23 | * (at your option) any later version. |
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| 24 | * |
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| 25 | * This program is distributed in the hope that it will be useful, |
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| 26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 28 | * GNU General Public License for more details. |
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| 29 | * |
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| 30 | * You should have received a copy of the GNU General Public License |
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| 31 | * along with this program; if not, write to the Free Software |
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| 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 33 | * |
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| 34 | */ |
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| 35 | |||
| 36 | #include "chimera.h" |
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| 37 | |||
| 38 | //#define DEBUG_SEND /* Print Sent Values */ |
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| 39 | #define SERIAL_ON /* Send Data using Serial Port */ |
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| 40 | |||
| 41 | /* Servo Tasks Constants */ |
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| 42 | #ifdef DUBUG_SEND |
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| 43 | #define SEND_TASK_WCET 6000 |
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| 44 | #else |
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| 45 | #define SEND_TASK_WCET 10000 |
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| 46 | #endif |
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| 47 | #define SEND_TASK_MIT 20000 |
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| 48 | |||
| 49 | #ifdef DUBUG_SEND |
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| 50 | #define GET_TASK_WCET 4000 |
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| 51 | #else |
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| 52 | #define GET_TASK_WCET 5000 |
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| 53 | #endif |
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| 54 | #define GET_TASK_MIT 20000 |
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| 55 | |||
| 56 | #define LEG_A 100.0 |
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| 57 | #define LEG_B 66.0 |
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| 58 | #define LEG_C 26.0 |
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| 59 | #define LEG_D 38.0 |
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| 60 | #define LEG_CD_2IPO 92.087 /* 2 * sqrt(LEG_C^2 + LEG_D^2) */ |
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| 61 | #define LEG_CD_ANG 34.380 /* arctg(LEG_C/LEG_D) in gradi */ |
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| 62 | |||
| 63 | const float c0 = LEG_C * LEG_C; |
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| 64 | const float c1 = LEG_B * LEG_B; |
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| 65 | const float c2 = LEG_B * LEG_B - LEG_A * LEG_A; |
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| 66 | const float todeg = 180.0 / PI; |
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| 67 | |||
| 68 | sem_t mx_status, mx_servo; |
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| 69 | HEXAPOD_STATE status; |
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| 70 | ANGLES_STATE angles[6]; |
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| 71 | |||
| 72 | void print_status(int n){ |
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| 73 | int i; |
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| 74 | |||
| 75 | if (n>=6) { |
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| 76 | for (i=0; i<6;i++) |
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| 77 | cprintf("Leg %1d: ( %3d | %3d | %3d ) (%d)\n", i, status.leg[i].x, status.leg[i].y, status.leg[i].z, status.leg[i].pwm ); |
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| 78 | cprintf("Power: %d", status.power); |
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| 79 | cprintf("\n"); |
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| 80 | } else { |
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| 81 | cprintf("Leg %1d: ( %3d | %3d | %3d ) (%1d-%1d)\n", n, status.leg[n].x,status.leg[n].y,status.leg[n].z, status.leg[n].pwm, status.power); |
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| 82 | } |
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| 83 | } |
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| 84 | |||
| 85 | int set_leg_position(int n, float px, float py, float pz) |
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| 86 | { |
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| 87 | float px2 = px * px; |
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| 88 | float py2 = py * py; |
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| 89 | float pz2 = pz * pz; |
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| 90 | |||
| 91 | float pxz2 = px2 + pz2; |
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| 92 | |||
| 93 | float alfa1,beta1,alfa2,beta2,gamma1; |
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| 94 | float m,dsqrt; |
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| 95 | |||
| 96 | float delta_xz = pxz2 - c0; |
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| 97 | float s,k,k2,y1,delta_xy; |
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| 98 | |||
| 99 | if (delta_xz < 0.0) return -1; |
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| 100 | |||
| 101 | if (pz >= LEG_C) { |
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| 102 | gamma1 = acos((pz * LEG_C + px * sqrt(delta_xz)) / pxz2) * todeg; |
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| 103 | } else { |
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| 104 | gamma1 = -acos((pz * LEG_C + px * sqrt(delta_xz)) / pxz2) * todeg; |
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| 105 | } |
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| 106 | |||
| 107 | if (gamma1 < -90.0 || gamma1 > 90.0) return -1; |
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| 108 | |||
| 109 | m = pxz2 - LEG_CD_2IPO * (sin(gamma1+LEG_CD_ANG)+cos(gamma1+LEG_CD_ANG)); |
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| 110 | |||
| 111 | s = m + py2; |
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| 112 | k = c2 + s; |
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| 113 | k2 = k * k; |
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| 114 | |||
| 115 | delta_xy = py2 * k2 - s * (k2 - 4.0 * m * c1); |
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| 116 | |||
| 117 | if (delta_xy >= 0.0) { |
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| 118 | dsqrt = sqrt(delta_xy); |
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| 119 | y1 = (py * k + dsqrt) / (2.0 * s); |
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| 120 | beta1 = asin(y1/LEG_B) * todeg; |
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| 121 | alfa1 = asin((y1 - py)/LEG_A) * todeg + beta1; |
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| 122 | y1 = (py * k - dsqrt) / (2.0 * s); |
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| 123 | beta2 = asin(y1/LEG_B) * todeg; |
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| 124 | alfa2 = asin((y1 - py)/LEG_A) * todeg + beta2; |
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| 125 | |||
| 126 | if ((alfa1 >= 0.0 && alfa1 <= 180.0) && (beta1 >= -90.0 && beta1 <= 90.0)) { |
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| 127 | angles[n].a = (int)(alfa1 * 3600.0); |
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| 128 | angles[n].b = (int)(beta1 * 3600.0); |
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| 129 | angles[n].c = (int)(gamma1 * 3600.0); |
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| 130 | #ifdef DEBUG_SEND |
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| 131 | cprintf("Leg %d: ( %3d | %3d | %3d )\n", n, angles[n].a, angles[n].b, angles[n].c); |
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| 132 | #endif |
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| 133 | return 0; |
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| 134 | } else if ((alfa2 >= 0.0 && alfa2 <= 180.0) && (beta2 >= -90.0 && beta2 <= 90.0)) { |
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| 135 | angles[n].a = (int)(alfa2 * 3600.0); |
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| 136 | angles[n].b = (int)(beta2 * 3600.0); |
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| 137 | angles[n].c = (int)(gamma1 * 3600.0); |
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| 138 | #ifdef DEBUG_SEND |
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| 139 | cprintf("Leg %d: ( %3d | %3d | %3d )\n", n, angles[n].a, angles[n].b, angles[n].c); |
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| 140 | #endif |
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| 141 | return 0; |
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| 142 | } else { |
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| 143 | #ifdef DEBUG_SEND |
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| 144 | cprintf("No possible !\n"); |
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| 145 | #endif |
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| 146 | return 1; |
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| 147 | } |
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| 148 | } else |
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| 149 | return 1; |
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| 150 | |||
| 151 | return 0; |
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| 152 | } |
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| 153 | |||
| 154 | TASK servo_send() |
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| 155 | { |
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| 156 | HEXAPOD_STATE old_status; |
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| 157 | register char changes, new_pos, new_pwm, new_power; |
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| 158 | int n; |
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| 159 | |||
| 160 | for (n=0; n<6;n++) { |
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| 161 | old_status.leg[n].x = 150; |
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| 162 | old_status.leg[n].y = 0; |
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| 163 | old_status.leg[n].z = 0; |
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| 164 | old_status.leg[n].pwm = 0; |
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| 165 | } |
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| 166 | old_status.power = 0; |
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| 167 | |||
| 168 | while (1) { |
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| 169 | changes = 0; |
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| 170 | |||
| 171 | for (n=0; n<6; n++){ |
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| 172 | new_pos = 0; |
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| 173 | new_pwm = 0; |
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| 174 | new_power = 0; |
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| 175 | |||
| 176 | //sem_wait(&mx_status); |
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| 177 | if ((status.leg[n].x != old_status.leg[n].x) || (status.leg[n].y != old_status.leg[n].y) || (status.leg[n].z != old_status.leg[n].z)) { |
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| 178 | if (set_leg_position(n, status.leg[n].x, status.leg[n].y, status.leg[n].z)==0) { |
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| 179 | old_status.leg[n].x = status.leg[n].x; |
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| 180 | old_status.leg[n].y = status.leg[n].y; |
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| 181 | old_status.leg[n].z = status.leg[n].z; |
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| 182 | new_pos++; |
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| 183 | } else { |
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| 184 | #ifdef DEBUG_SEND |
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| 185 | cprintf("Position not reachable.\n"); |
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| 186 | #endif |
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| 187 | status.leg[n].x = old_status.leg[n].x; |
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| 188 | status.leg[n].y = old_status.leg[n].y; |
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| 189 | status.leg[n].z = old_status.leg[n].z; |
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| 190 | } |
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| 191 | } |
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| 192 | if (status.leg[n].pwm != old_status.leg[n].pwm) { |
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| 193 | old_status.leg[n].pwm = status.leg[n].pwm; |
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| 194 | new_pwm++; |
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| 195 | } |
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| 196 | if (status.power != old_status.power) { |
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| 197 | old_status.power = status.power; |
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| 198 | new_power++; |
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| 199 | } |
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| 200 | //sem_post(&mx_status); |
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| 201 | |||
| 202 | if (new_pos) { |
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| 203 | #ifdef SERIAL_ON |
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| 204 | sem_wait(&mx_servo); |
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| 205 | servo_set_angle_sec(COM_PORT, n*3+2, angles[n].a); |
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| 206 | servo_set_angle_sec(COM_PORT, n*3+1, angles[n].b); |
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| 207 | servo_set_angle_sec(COM_PORT, n*3 , angles[n].c); |
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| 208 | sem_post(&mx_servo); |
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| 209 | #endif |
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| 210 | } |
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| 211 | |||
| 212 | if (new_pwm) { |
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| 213 | #ifdef SERIAL_ON |
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| 214 | sem_wait(&mx_servo); |
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| 215 | (old_status.leg[n].pwm & 1) ? servo_turn_on(COM_PORT, n*3+2) : servo_turn_off(COM_PORT, n*3+2); |
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| 216 | (old_status.leg[n].pwm & 2) ? servo_turn_on(COM_PORT, n*3+1) : servo_turn_off(COM_PORT, n*3+1); |
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| 217 | (old_status.leg[n].pwm & 4) ? servo_turn_on(COM_PORT, n*3 ) : servo_turn_off(COM_PORT, n*3 ); |
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| 218 | sem_post(&mx_servo); |
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| 219 | #endif |
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| 220 | } |
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| 221 | if (new_power) { |
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| 222 | #ifdef SERIAL_ON |
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| 223 | if (old_status.power) { |
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| 224 | sem_wait(&mx_servo); |
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| 225 | servo_set_RC5_switch(COM_PORT, 1); |
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| 226 | sem_post(&mx_servo); |
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| 227 | } else { |
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| 228 | sem_wait(&mx_servo); |
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| 229 | servo_set_RC5_switch(COM_PORT, 0); |
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| 230 | sem_post(&mx_servo); |
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| 231 | } |
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| 232 | #endif |
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| 233 | } |
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| 234 | |||
| 235 | if (new_pos || new_pwm || new_power) { |
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| 236 | changes++; |
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| 237 | #ifdef DEBUG_SEND |
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| 238 | print_status(n); |
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| 239 | #endif |
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| 240 | } |
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| 241 | } |
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| 242 | task_endcycle(); |
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| 243 | } |
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| 244 | |||
| 245 | return 0; |
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| 246 | } |
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| 247 | |||
| 248 | TASK servo_get() |
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| 249 | { |
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| 250 | int i = 0; |
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| 251 | |||
| 252 | while (1) { |
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| 253 | #ifdef SERIAL_ON |
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| 254 | //sem_wait(&mx_status); |
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| 255 | sem_wait(&mx_servo); |
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| 256 | status.leg[i ].adc_in = servo_get_analog(COM_PORT, i ); |
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| 257 | status.leg[i+1].adc_in = servo_get_analog(COM_PORT, i+1); |
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| 258 | sem_post(&mx_servo); |
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| 259 | #ifdef DEBUG_SEND |
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| 260 | cprintf("Leg %1d-%1d: (%4d) (%4d)\n", i, i+1, status.leg[i].adc_in, status.leg[i+1].adc_in); |
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| 261 | #endif |
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| 262 | i = (i+2)%6; |
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| 263 | //sem_post(&mx_status); |
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| 264 | #endif |
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| 265 | task_endcycle(); |
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| 266 | } |
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| 267 | |||
| 268 | return 0; |
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| 269 | } |
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| 270 | |||
| 271 | int init_serial() |
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| 272 | { |
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| 273 | int err; |
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| 274 | err = servo_open(COM_PORT, COM_SPEED); |
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| 275 | |||
| 276 | return err; |
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| 277 | } |
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| 278 | |||
| 279 | void end_serial() |
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| 280 | { |
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| 281 | servo_close(COM_PORT); |
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| 282 | } |
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| 283 | |||
| 284 | void init_send_task() |
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| 285 | { |
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| 286 | HARD_TASK_MODEL ms; |
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| 287 | PID pid; |
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| 288 | |||
| 289 | hard_task_default_model(ms); |
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| 290 | hard_task_def_ctrl_jet(ms); |
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| 291 | hard_task_def_wcet(ms, SEND_TASK_WCET); |
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| 292 | hard_task_def_mit(ms, SEND_TASK_MIT); |
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| 293 | hard_task_def_usemath(ms); |
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| 294 | pid = task_create("Send_Task", servo_send, &ms, NULL); |
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| 295 | if (pid == NIL) { |
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| 296 | perror("Could not create task <Send_Task>"); |
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| 297 | sys_end(); |
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| 298 | } else |
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| 299 | task_activate(pid); |
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| 300 | |||
| 301 | hard_task_default_model(ms); |
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| 302 | hard_task_def_ctrl_jet(ms); |
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| 303 | hard_task_def_wcet(ms, GET_TASK_WCET); |
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| 304 | hard_task_def_mit(ms, GET_TASK_MIT); |
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| 305 | hard_task_def_usemath(ms); |
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| 306 | pid = task_create("Get_Task", servo_get, &ms, NULL); |
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| 307 | if (pid == NIL) { |
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| 308 | perror("Could not create task <Get_Task>"); |
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| 309 | sys_end(); |
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| 310 | } else |
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| 311 | task_activate(pid); |
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| 312 | } |
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| 313 | |||
| 314 | void init_send() |
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| 315 | { |
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| 316 | int i; |
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| 317 | |||
| 318 | if (init_serial()) { |
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| 319 | perror("Could not initialize serial port."); |
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| 320 | sys_end(); |
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| 321 | } |
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| 322 | |||
| 323 | //sem_init(&mx_status,0,1); |
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| 324 | sem_init(&mx_servo,0,1); |
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| 325 | |||
| 326 | for (i=0; i<6;i++) { |
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| 327 | status.leg[i].x = 150; |
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| 328 | status.leg[i].y = 0; |
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| 329 | status.leg[i].z = 0; |
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| 330 | status.leg[i].pwm = 0; |
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| 331 | } |
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| 332 | status.power = 0; |
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| 333 | |||
| 334 | init_send_task(); |
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| 335 | } |
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| 336 | |||
| 337 | void end_send() |
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| 338 | { |
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| 339 | end_serial(); |
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| 340 | } |