00001 /* 00002 *Copyright (c) 2000-2002 Viola Systems Ltd. 00003 *All rights reserved. 00004 * 00005 *Redistribution and use in source and binary forms, with or without 00006 *modification, are permitted provided that the following conditions 00007 *are met: 00008 * 00009 *1. Redistributions of source code must retain the above copyright 00010 *notice, this list of conditions and the following disclaimer. 00011 * 00012 *2. Redistributions in binary form must reproduce the above copyright 00013 *notice, this list of conditions and the following disclaimer in the 00014 *documentation and/or other materials provided with the distribution. 00015 * 00016 *3. The end-user documentation included with the redistribution, if 00017 *any, must include the following acknowledgment: 00018 * "This product includes software developed by Viola 00019 * Systems (http://www.violasystems.com/)." 00020 * 00021 *Alternately, this acknowledgment may appear in the software itself, 00022 *if and wherever such third-party acknowledgments normally appear. 00023 * 00024 *4. The names "OpenTCP" and "Viola Systems" must not be used to 00025 *endorse or promote products derived from this software without prior 00026 *written permission. For written permission, please contact 00027 *opentcp@opentcp.org. 00028 * 00029 *5. Products derived from this software may not be called "OpenTCP", 00030 *nor may "OpenTCP" appear in their name, without prior written 00031 *permission of the Viola Systems Ltd. 00032 * 00033 *THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED 00034 *WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00035 *MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 00036 *IN NO EVENT SHALL VIOLA SYSTEMS LTD. OR ITS CONTRIBUTORS BE LIABLE 00037 *FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00038 *CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00039 *SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 00040 *BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 00041 *WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 00042 *OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 00043 *EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00044 *==================================================================== 00045 * 00046 *OpenTCP is the unified open source TCP/IP stack available on a series 00047 *of 8/16-bit microcontrollers, please see <http://www.opentcp.org>. 00048 * 00049 *For more information on how to network-enable your devices, or how to 00050 *obtain commercial technical support for OpenTCP, please see 00051 *<http://www.violasystems.com/>. 00052 */ 00053 00074 #include <inet/debug.h> 00075 #include <inet/datatypes.h> 00076 #include <inet/timers.h> 00077 #include <inet/system.h> 00078 00086 struct 00087 { 00088 UINT32 value; 00089 UINT8 free; 00090 } timer_pool[NUMTIMERS]; 00091 00105 void timer_pool_init (void) 00106 { 00107 UINT8 i; 00108 00109 for( i=0; i < NUMTIMERS; i++) { 00110 timer_pool[i].value = 0; 00111 timer_pool[i].free = TRUE; 00112 00113 } 00114 00115 00116 } 00117 00118 00131 UINT8 get_timer (void) 00132 { 00133 00134 UINT8 i; 00135 UINT8 first_match; 00136 00137 00138 for( i=0; i < NUMTIMERS; i++) { 00139 if( timer_pool[i].free == TRUE ) { 00140 /* We found a free timer! */ 00141 /* Mark is reserved */ 00142 00143 timer_pool[i].free = FALSE; 00144 first_match = i; 00145 return first_match; /* Return Handle */ 00146 } 00147 00148 } 00149 00150 /* Error Check */ 00151 00152 TMR_DEBUGOUT("No Timers, Resetting..\n\r"); 00153 RESET_SYSTEM(); 00154 00155 00156 } 00157 00158 00169 void free_timer (UINT8 nbr) 00170 { 00171 /* Make a simple check */ 00172 00173 if( nbr > (NUMTIMERS-1) ) 00174 return; 00175 00176 timer_pool[nbr].free = TRUE; 00177 00178 } 00179 00180 00194 void init_timer ( UINT8 nbr, UINT32 tout ) 00195 { 00196 /* Make a simple check */ 00197 00198 UINT32 val; 00199 00200 if( nbr > (NUMTIMERS-1) ) 00201 return; 00202 00203 if( timer_pool[nbr].free == TRUE ) 00204 return; 00205 00206 /* All OK */ 00207 00208 val = tout; 00209 00210 OS_EnterCritical(); 00211 00212 /* Normalize seconds to timer tics */ 00213 00214 timer_pool[nbr].value = val; 00215 00216 OS_ExitCritical(); 00217 00218 } 00219 00233 UINT32 check_timer (UINT8 nbr) 00234 { 00235 00236 return timer_pool[nbr].value; 00237 00238 } 00239 00240 00248 void decrement_timers (void) 00249 { 00250 UINT8 i; 00251 00252 /* Go Through Timers */ 00253 00254 for( i=0; i<NUMTIMERS; i++ ) { 00255 if( (timer_pool[i].free == FALSE) && (timer_pool[i].value != 0)) 00256 timer_pool[i].value --; 00257 } 00258 }