2 * freeglut_input_devices.c
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4 * Handles miscellaneous input devices via direct serial-port access.
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5 * Proper X11 XInput device support is not yet supported.
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6 * Also lacks Mac support.
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8 * Written by Joe Krahn <krahn@niehs.nih.gov> 2005
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10 * Copyright (c) 2005 Stephen J. Baker. All Rights Reserved.
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12 * Permission is hereby granted, free of charge, to any person obtaining a
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13 * copy of this software and associated documentation files (the "Software"),
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14 * to deal in the Software without restriction, including without limitation
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15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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16 * and/or sell copies of the Software, and to permit persons to whom the
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17 * Software is furnished to do so, subject to the following conditions:
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19 * The above copyright notice and this permission notice shall be included
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20 * in all copies or substantial portions of the Software.
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22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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23 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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25 * PAWEL W. OLSZTA OR STEPHEN J. BAKER BE LIABLE FOR ANY CLAIM, DAMAGES OR
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26 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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27 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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28 * DEALINGS IN THE SOFTWARE.
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31 #ifdef HAVE_CONFIG_H
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32 # include "config.h"
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35 #include <GL/freeglut.h>
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36 #include "freeglut_internal.h"
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38 #if TARGET_HOST_POSIX_X11
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42 #include <sys/ioctl.h>
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46 #include <termios.h>
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51 struct termios termio, termio_save;
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56 typedef struct _serialport SERIALPORT;
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59 /********************* Dialbox definitions ***********************/
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61 #define DIAL_NUM_VALUATORS 8
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63 /* dial parser state machine states */
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64 #define DIAL_NEW (-1)
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65 #define DIAL_WHICH_DEVICE 0
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66 #define DIAL_VALUE_HIGH 1
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67 #define DIAL_VALUE_LOW 2
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69 /* dial/button box commands */
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70 #define DIAL_INITIALIZE 0x20
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71 #define DIAL_SET_LEDS 0x75
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72 #define DIAL_SET_TEXT 0x61
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73 #define DIAL_SET_AUTO_DIALS 0x50
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74 #define DIAL_SET_AUTO_DELTA_DIALS 0x51
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75 #define DIAL_SET_FILTER 0x53
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76 #define DIAL_SET_BUTTONS_MOM_TYPE 0x71
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77 #define DIAL_SET_AUTO_MOM_BUTTONS 0x73
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78 #define DIAL_SET_ALL_LEDS 0x4b
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79 #define DIAL_CLEAR_ALL_LEDS 0x4c
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81 /* dial/button box replies and events */
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82 #define DIAL_INITIALIZED 0x20
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83 #define DIAL_BASE 0x30
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84 #define DIAL_DELTA_BASE 0x40
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85 #define DIAL_PRESS_BASE 0xc0
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86 #define DIAL_RELEASE_BASE 0xe0
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88 /* macros to determine reply type */
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89 #define IS_DIAL_EVENT(ch) (((ch)>=DIAL_BASE)&&((ch)<DIAL_BASE+DIAL_NUM_VALUATORS))
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90 #define IS_KEY_PRESS(ch) (((ch)>=DIAL_PRESS_BASE)&&((ch)<DIAL_PRESS_BASE+DIAL_NUM_BUTTONS))
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91 #define IS_KEY_RELEASE(ch) (((ch)>=DIAL_RELEASE_BASE)&&((ch)<DIAL_RELEASE_BASE+DIAL_NUM_BUTTONS))
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92 #define IS_INIT_EVENT(ch) ((ch)==DIAL_INITIALIZED)
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94 /*****************************************************************/
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96 extern SERIALPORT *serial_open ( const char *device );
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97 extern void serial_close ( SERIALPORT *port );
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98 extern int serial_getchar ( SERIALPORT *port );
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99 extern int serial_putchar ( SERIALPORT *port, unsigned char ch );
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100 extern void serial_flush ( SERIALPORT *port );
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102 extern void fgPlatformRegisterDialDevice ( const char *dial_device );
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103 static void send_dial_event(int dial, int value);
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104 static void poll_dials(int id);
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106 /* local variables */
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107 static SERIALPORT *dialbox_port=NULL;
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109 /*****************************************************************/
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112 * Implementation for glutDeviceGet(GLUT_HAS_DIAL_AND_BUTTON_BOX)
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114 int fgInputDeviceDetect( void )
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116 fgInitialiseInputDevices ();
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118 if ( !dialbox_port )
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121 if ( !fgState.InputDevsInitialised )
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128 * Try initializing the input device(s)
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130 #if TARGET_HOST_POSIX_X11
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131 void fgPlatformRegisterDialDevice ( const char *dial_device )
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136 void fgInitialiseInputDevices ( void )
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138 if( !fgState.InputDevsInitialised )
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140 const char *dial_device=NULL;
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141 dial_device = getenv ( "GLUT_DIALS_SERIAL" );
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142 fgPlatformRegisterDialDevice ( dial_device );
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144 if ( !dial_device ) return;
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145 if ( !( dialbox_port = serial_open ( dial_device ) ) ) return;
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146 serial_putchar(dialbox_port,DIAL_INITIALIZE);
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147 glutTimerFunc ( 10, poll_dials, 0 );
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148 fgState.InputDevsInitialised = GL_TRUE;
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155 void fgInputDeviceClose( void )
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157 if ( fgState.InputDevsInitialised )
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159 serial_close ( dialbox_port );
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160 dialbox_port = NULL;
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161 fgState.InputDevsInitialised = GL_FALSE;
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165 /********************************************************************/
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167 /* Check all windows for dialbox callbacks */
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168 static void fghcbEnumDialCallbacks ( SFG_Window *window, SFG_Enumerator *enumerator )
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170 /* Built-in to INVOKE_WCB(): if window->Callbacks[CB_Dials] */
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171 INVOKE_WCB ( *window,Dials, ( ((int*)enumerator->data)[0], ((int*)enumerator->data)[1]) );
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172 fgEnumSubWindows ( window, fghcbEnumDialCallbacks, enumerator );
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175 static void send_dial_event ( int num, int value )
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177 SFG_Enumerator enumerator;
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181 enumerator.found = GL_FALSE;
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182 enumerator.data = data;
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183 fgEnumWindows ( fghcbEnumDialCallbacks, &enumerator );
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186 /********************************************************************/
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187 static void poll_dials ( int id )
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190 static int dial_state = DIAL_NEW;
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191 static int dial_which;
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192 static int dial_value;
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193 static int dials[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
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195 if ( !dialbox_port ) return;
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197 while ( (data=serial_getchar(dialbox_port)) != EOF )
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199 if ( ( dial_state > DIAL_WHICH_DEVICE ) || IS_DIAL_EVENT ( data ) )
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201 switch ( dial_state )
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203 case DIAL_WHICH_DEVICE:
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204 dial_which = data - DIAL_BASE;
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207 case DIAL_VALUE_HIGH:
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208 dial_value = ( data << 8 );
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211 case DIAL_VALUE_LOW:
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212 dial_value |= data;
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213 if ( dial_value & 0x8000 ) dial_value -= 0x10000;
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214 dials[dial_which] = dial_value;
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215 send_dial_event ( dial_which + 1, dial_value * 360 / 256 );
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216 dial_state = DIAL_WHICH_DEVICE;
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219 /* error: Impossible state value! */
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223 else if ( data == DIAL_INITIALIZED )
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225 fgState.InputDevsInitialised = GL_TRUE;
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226 dial_state = DIAL_WHICH_DEVICE;
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227 serial_putchar(dialbox_port,DIAL_SET_AUTO_DIALS);
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228 serial_putchar(dialbox_port,0xff);
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229 serial_putchar(dialbox_port,0xff);
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231 else /* Unknown data; try flushing. */
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232 serial_flush(dialbox_port);
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235 glutTimerFunc ( 2, poll_dials, 0 );
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239 /******** OS Specific Serial I/O routines *******/
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240 #if TARGET_HOST_POSIX_X11 /* ==> Linux/BSD/UNIX POSIX serial I/O */
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241 static SERIALPORT *serial_open ( const char *device )
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244 struct termios termio;
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247 fd = open(device, O_RDWR | O_NONBLOCK );
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253 port = malloc(sizeof(SERIALPORT));
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254 memset(port, 0, sizeof(SERIALPORT));
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257 /* save current port settings */
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258 tcgetattr(fd,&port->termio_save);
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260 memset(&termio, 0, sizeof(termio));
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261 termio.c_cflag = CS8 | CREAD | HUPCL ;
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262 termio.c_iflag = IGNPAR | IGNBRK ;
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263 termio.c_cc[VTIME] = 0; /* inter-character timer */
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264 termio.c_cc[VMIN] = 1; /* block read until 1 chars received, when blocking I/O */
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266 cfsetispeed(&termio, B9600);
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267 cfsetospeed(&termio, B9600);
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268 tcsetattr(fd,TCSANOW,&termio);
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270 serial_flush(port);
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274 static void serial_close(SERIALPORT *port)
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278 /* restore old port settings */
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279 tcsetattr(port->fd,TCSANOW,&port->termio_save);
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285 static int serial_getchar(SERIALPORT *port)
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288 if (!port) return EOF;
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289 if (read(port->fd,&ch,1)) return ch;
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293 static int serial_putchar(SERIALPORT *port, unsigned char ch){
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294 if (!port) return 0;
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295 return write(port->fd,&ch,1);
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298 static void serial_flush ( SERIALPORT *port )
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300 tcflush ( port->fd, TCIOFLUSH );
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