annotate src/video/fbcon/SDL_fbelo.c @ 1338:604d73db6802

Removed uses of stdlib.h and string.h
author Sam Lantinga <slouken@libsdl.org>
date Tue, 07 Feb 2006 09:29:18 +0000
parents 3692456e7b0f
children d02b552e5304
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #include <unistd.h>
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24 #include <sys/time.h>
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25 #include <ctype.h>
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26
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27 #include "SDL_stdlib.h"
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28 #include "SDL_string.h"
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29 #include "SDL_fbvideo.h"
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30 #include "SDL_fbelo.h"
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31
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32 /*
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33 calibration default values
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34 values are read from the following environment variables:
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35
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36 SDL_ELO_MIN_X
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37 SDL_ELO_MAX_X
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38 SDL_ELO_MIN_Y
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39 SDL_ELO_MAX_Y
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40 */
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41
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42 static int ELO_MIN_X = 400;
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43 static int ELO_MAX_X = 3670;
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44 static int ELO_MIN_Y = 500;
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45 static int ELO_MAX_Y = 3540;
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46
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47 #define ELO_SNAP_SIZE 6
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48 #define ELO_TOUCH_BYTE 'T'
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49 #define ELO_ID 'I'
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50 #define ELO_MODE 'M'
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51 #define ELO_PARAMETER 'P'
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52 #define ELO_REPORT 'B'
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53 #define ELO_ACK 'A'
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54
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55 #define ELO_INIT_CHECKSUM 0xAA
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56
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57 #define ELO_BTN_PRESS 0x01
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58 #define ELO_STREAM 0x02
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59 #define ELO_BTN_RELEASE 0x04
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60
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61 #define ELO_TOUCH_MODE 0x01
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62 #define ELO_STREAM_MODE 0x02
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63 #define ELO_UNTOUCH_MODE 0x04
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64 #define ELO_RANGE_CHECK_MODE 0x40
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65 #define ELO_TRIM_MODE 0x02
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66 #define ELO_CALIB_MODE 0x04
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67 #define ELO_SCALING_MODE 0x08
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68 #define ELO_TRACKING_MODE 0x40
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69
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70 #define ELO_SERIAL_MASK 0xF8
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71
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72 #define ELO_SERIAL_IO '0'
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73
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74 #define ELO_MAX_TRIALS 3
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75 #define ELO_MAX_WAIT 100000
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76 #define ELO_UNTOUCH_DELAY 5
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77 #define ELO_REPORT_DELAY 1
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78
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79 /* eloParsePacket
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80 */
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81 int eloParsePacket(unsigned char* mousebuf, int* dx, int* dy, int* button_state) {
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82 static int elo_button = 0;
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83 static int last_x = 0;
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84 static int last_y = 0;
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85 int x,y;
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86
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87 /* Check if we have a touch packet */
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88 if (mousebuf[1] != ELO_TOUCH_BYTE) {
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89 return 0;
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90 }
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91
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92 x = ((mousebuf[4] << 8) | mousebuf[3]);
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93 y = ((mousebuf[6] << 8) | mousebuf[5]);
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94
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95 if((abs(x - last_x) > ELO_SNAP_SIZE) || (abs(y - last_y) > ELO_SNAP_SIZE)) {
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96 *dx = ((mousebuf[4] << 8) | mousebuf[3]);
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97 *dy = ((mousebuf[6] << 8) | mousebuf[5]);
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98 }
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99 else {
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100 *dx = last_x;
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101 *dy = last_y;
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102 }
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103
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104 last_x = *dx;
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105 last_y = *dy;
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106
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107 if ( (mousebuf[2] & 0x07) == ELO_BTN_PRESS ) {
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108 elo_button = 1;
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109 }
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110 if ( (mousebuf[2] & 0x07) == ELO_BTN_RELEASE ) {
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111 elo_button = 0;
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112 }
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113
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114 *button_state = elo_button;
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115 return 1;
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116 }
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117
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118 /* Convert the raw coordinates from the ELO controller
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119 to a screen position.
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120 */
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121 void eloConvertXY(_THIS, int *dx, int *dy) {
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122 int input_x = *dx;
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123 int input_y = *dy;
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124 int width = ELO_MAX_X - ELO_MIN_X;
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125 int height = ELO_MAX_Y - ELO_MIN_Y;
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126
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127 *dx = ((int)cache_vinfo.xres - ((int)cache_vinfo.xres * (input_x - ELO_MIN_X)) / width);
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128 *dy = (cache_vinfo.yres * (input_y - ELO_MIN_Y)) / height;
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129 }
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130
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131
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132 /* eloGetPacket
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133 */
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134 int eloGetPacket(unsigned char* buffer, int* buffer_p, int* checksum, int fd) {
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135 int num_bytes;
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136 int ok;
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137
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138 if(fd == 0) {
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139 num_bytes = ELO_PACKET_SIZE;
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140 }
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141 else {
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142 num_bytes = read(fd,
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143 (char *) (buffer + *buffer_p),
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144 ELO_PACKET_SIZE - *buffer_p);
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145 }
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146
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147 if (num_bytes < 0) {
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148 #ifdef DEBUG_MOUSE
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149 fprintf(stderr, "System error while reading from Elographics touchscreen.\n");
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150 #endif
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151 return 0;
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152 }
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153
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154 while (num_bytes) {
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155 if ((*buffer_p == 0) && (buffer[0] != ELO_START_BYTE)) {
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156 SDL_memcpy(&buffer[0], &buffer[1], num_bytes-1);
0
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157 }
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158 else {
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159 if (*buffer_p < ELO_PACKET_SIZE-1) {
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160 *checksum = *checksum + buffer[*buffer_p];
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161 *checksum = *checksum % 256;
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162 }
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163 (*buffer_p)++;
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parents:
diff changeset
164 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
165 num_bytes--;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
166 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
167
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
168 if (*buffer_p == ELO_PACKET_SIZE) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
169 ok = (*checksum == buffer[ELO_PACKET_SIZE-1]);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
170 *checksum = ELO_INIT_CHECKSUM;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
171 *buffer_p = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
172
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
173 if (!ok) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
174 return 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
175 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
176
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
177 return 1;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
178 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
179 else {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
180 return 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
181 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
182 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
183
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
184 /* eloSendPacket
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
185 */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
186
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
187 int eloSendPacket(unsigned char* packet, int fd)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
188 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
189 int i, result;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
190 int sum = ELO_INIT_CHECKSUM;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
191
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
192 packet[0] = ELO_START_BYTE;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
193 for (i = 0; i < ELO_PACKET_SIZE-1; i++) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
194 sum += packet[i];
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
195 sum &= 0xFF;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
196 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
197 packet[ELO_PACKET_SIZE-1] = sum;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
198
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
199 result = write(fd, packet, ELO_PACKET_SIZE);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
200
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
201 if (result != ELO_PACKET_SIZE) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
202 #ifdef DEBUG_MOUSE
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203 printf("System error while sending to Elographics touchscreen.\n");
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204 #endif
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205 return 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
206 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 else {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
208 return 1;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
209 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213 /* eloWaitForInput
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
214 */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
215 int eloWaitForInput(int fd, int timeout)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
216 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
217 fd_set readfds;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218 struct timeval to;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
219 int r;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
220
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
221 FD_ZERO(&readfds);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222 FD_SET(fd, &readfds);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
223 to.tv_sec = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
224 to.tv_usec = timeout;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
225
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
226 r = select(FD_SETSIZE, &readfds, NULL, NULL, &to);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
227 return r;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
228 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
229
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
230 /* eloWaitReply
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
231 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232 int eloWaitReply(unsigned char type, unsigned char *reply, int fd) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
233 int ok;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
234 int i, result;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
235 int reply_p = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
236 int sum = ELO_INIT_CHECKSUM;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
237
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 i = ELO_MAX_TRIALS;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239 do {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
240 ok = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
241
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
242 result = eloWaitForInput(fd, ELO_MAX_WAIT);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
243
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
244 if (result > 0) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 ok = eloGetPacket(reply, &reply_p, &sum, fd);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
246
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
247 if (ok && reply[1] != type && type != ELO_PARAMETER) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
248 #ifdef DEBUG_MOUSE
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
249 fprintf(stderr, "Wrong reply received\n");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
250 #endif
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
251 ok = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
252 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
253 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
255 #ifdef DEBUG_MOUSE
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 fprintf(stderr, "No input!\n");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
257 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
259
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260 if (result == 0) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
261 i--;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
262 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
263 } while(!ok && (i>0));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
264
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
265 return ok;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
266 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
267
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 /* eloWaitAck
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
270 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
272 int eloWaitAck(int fd) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
273 unsigned char packet[ELO_PACKET_SIZE];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
274 int i, nb_errors;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
275
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
276 if (eloWaitReply(ELO_ACK, packet, fd)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
277 for (i = 0, nb_errors = 0; i < 4; i++) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
278 if (packet[2 + i] != '0') {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279 nb_errors++;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 if (nb_errors != 0) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 #ifdef DEBUG_MOUSE
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285 fprintf(stderr, "Elographics acknowledge packet reports %d errors\n", nb_errors);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 return 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 return 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296 /* eloSendQuery --
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298 int eloSendQuery(unsigned char *request, unsigned char* reply, int fd) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299 int ok;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 if (eloSendPacket(request, fd)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 ok = eloWaitReply(toupper(request[1]), reply, fd);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 if (ok) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304 ok = eloWaitAck(fd);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 return ok;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 return 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314 /* eloSendControl
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 int eloSendControl(unsigned char* control, int fd) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317 if (eloSendPacket(control, fd)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 return eloWaitAck(fd);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 return 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 /* eloInitController
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 int eloInitController(int fd) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 unsigned char req[ELO_PACKET_SIZE];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 unsigned char reply[ELO_PACKET_SIZE];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 const char *buffer = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 int result = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 struct termios mouse_termios;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 /* try to read the calibration values */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
336 buffer = SDL_getenv("SDL_ELO_MIN_X");
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 if(buffer) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 ELO_MIN_X = atoi(buffer);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 }
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
340 buffer = SDL_getenv("SDL_ELO_MAX_X");
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 if(buffer) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 ELO_MAX_X = atoi(buffer);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 }
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344 buffer = SDL_getenv("SDL_ELO_MIN_Y");
0
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345 if(buffer) {
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346 ELO_MIN_Y = atoi(buffer);
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347 }
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348 buffer = SDL_getenv("SDL_ELO_MAX_Y");
0
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349 if(buffer) {
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350 ELO_MAX_Y = atoi(buffer);
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351 }
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352
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353 #ifdef DEBUG_MOUSE
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354 fprintf( stderr, "ELO calibration values:\nmin_x: %i\nmax_x: %i\nmin_y: %i\nmax_y: %i\n",
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355 ELO_MIN_X,
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356 ELO_MAX_X,
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357 ELO_MIN_Y,
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358 ELO_MAX_Y);
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parents:
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359 #endif
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360
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361 /* set comm params */
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362 SDL_memset(&mouse_termios, 0, sizeof(mouse_termios));
0
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363 mouse_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL;
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364 mouse_termios.c_cc[VMIN] = 1;
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365 result = tcsetattr(fd, TCSANOW, &mouse_termios);
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366
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367 if (result < 0) {
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368 #ifdef DEBUG_MOUSE
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369 fprintf( stderr, "Unable to configure Elographics touchscreen port\n");
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370 #endif
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371 return 0;
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parents:
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372 }
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373
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374 SDL_memset(req, 0, ELO_PACKET_SIZE);
0
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375 req[1] = tolower(ELO_PARAMETER);
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376 if (!eloSendQuery(req, reply, fd)) {
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diff changeset
377 #ifdef DEBUG_MOUSE
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378 fprintf( stderr, "Not at the specified rate or model 2310, will continue\n");
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parents:
diff changeset
379 #endif
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parents:
diff changeset
380 }
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diff changeset
381
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382 SDL_memset(req, 0, ELO_PACKET_SIZE);
0
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383 req[1] = tolower(ELO_ID);
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parents:
diff changeset
384 if (eloSendQuery(req, reply, fd)) {
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parents:
diff changeset
385 #ifdef DEBUG_MOUSE
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parents:
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386 fprintf(stderr, "Ok, controller configured!\n");
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parents:
diff changeset
387 #endif
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parents:
diff changeset
388 }
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parents:
diff changeset
389 else {
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parents:
diff changeset
390 #ifdef DEBUG_MOUSE
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parents:
diff changeset
391 fprintf( stderr, "Unable to ask Elographics touchscreen identification\n");
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parents:
diff changeset
392 #endif
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parents:
diff changeset
393 return 0;
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parents:
diff changeset
394 }
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parents:
diff changeset
395
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diff changeset
396 SDL_memset(req, 0, ELO_PACKET_SIZE);
0
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parents:
diff changeset
397 req[1] = ELO_MODE;
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parents:
diff changeset
398 req[3] = ELO_TOUCH_MODE | ELO_STREAM_MODE | ELO_UNTOUCH_MODE;
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parents:
diff changeset
399 req[4] = ELO_TRACKING_MODE;
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parents:
diff changeset
400 if (!eloSendControl(req, fd)) {
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parents:
diff changeset
401 #ifdef DEBUG_MOUSE
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 fprintf( stderr, "Unable to change Elographics touchscreen operating mode\n");
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 #endif
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parents:
diff changeset
404 return 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 }
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parents:
diff changeset
406
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parents: 1312
diff changeset
407 SDL_memset(req, 0, ELO_PACKET_SIZE);
0
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parents:
diff changeset
408 req[1] = ELO_REPORT;
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parents:
diff changeset
409 req[2] = ELO_UNTOUCH_DELAY;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 req[3] = ELO_REPORT_DELAY;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 if (!eloSendControl(req, fd)) {
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parents:
diff changeset
412 #ifdef DEBUG_MOUSE
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 fprintf( stderr, "Unable to change Elographics touchscreen reports timings\n");
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 #endif
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 return 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 return 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 }
4
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
420
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
421 int eloReadPosition(_THIS, int fd, int* x, int* y, int* button_state, int* realx, int* realy) {
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
422 unsigned char buffer[ELO_PACKET_SIZE];
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
423 int pointer = 0;
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
424 int checksum = ELO_INIT_CHECKSUM;
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
425
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
426 while(pointer < ELO_PACKET_SIZE) {
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
427 if(eloGetPacket(buffer, &pointer, &checksum, fd)) {
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
428 break;
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
429 }
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
430 }
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
431
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
432 if(!eloParsePacket(buffer, realx, realy, button_state)) {
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
433 return 0;
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
434 }
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
435
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
436 *x = *realx;
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
437 *y = *realy;
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
438
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
439 eloConvertXY(this, x, y);
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
440
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
441 return 1;
4f6c5f021323 Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
442 }