taler-xotp_fw

xOTP generator firmware
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syncInterface.c (2172B)

      1 /**
      2  * @file syncInterface.c
      3  * @author Adrian STEINER (steia19@bfh.ch)
      4  * @brief synchronisation interface to get a valid reference time
      5  * @version 0.1
      6  * @date 12-02-2025
      7  *
      8  * @copyright (C) 2025 Adrian STEINER
      9  * This program is free software: you can redistribute it and/or modify
     10  * it under the terms of the GNU General Public License as published by
     11  * the Free Software Foundation, either version 3 of the License, or
     12  * (at your option) any later version.
     13  *
     14  * This program is distributed in the hope that it will be useful,
     15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     17  * GNU General Public License for more details.
     18  *
     19  * You should have received a copy of the GNU General Public License
     20  * along with this program.  If not, see <https: //www.gnu.org/licenses/>.
     21  *
     22  */
     23 
     24 #include "syncInterface.h"
     25 
     26 #include <stdint.h>
     27 #include <stdlib.h>
     28 
     29 #include "xtotpConfig.h"
     30 #include "xtotpUtil.h"
     31 
     32 uint8_t sync_initInterface(
     33     syncInterface *interfaceHandler,
     34     syncPwrCB powerOnCB,
     35     syncPwrCB powerOffCB,
     36     synchronizeCB syncCB,
     37     uint64_t lastSyncTime) {
     38   if (NULL == interfaceHandler || NULL == powerOnCB || NULL == powerOffCB || NULL == syncCB) {
     39     return EXIT_FAILURE;
     40   }
     41   // Register callbacks and initial values
     42   interfaceHandler->powerOn = powerOnCB;
     43   interfaceHandler->powerOff = powerOffCB;
     44   interfaceHandler->synchronize = syncCB;
     45   interfaceHandler->lastSyncTime = lastSyncTime;
     46   interfaceHandler->expectedSyncTime = lastSyncTime + XTOTP_SYNC_UPDATE_PERIOD;
     47 
     48   // Set all other data to 0
     49   interfaceHandler->isSynchronizing = false;
     50   interfaceHandler->syncDuration = 0;
     51   interfaceHandler->syncDiff = 0;
     52   return EXIT_SUCCESS;
     53 }
     54 
     55 void sync_enable(syncInterface *interfaceHandler) {
     56   if (interfaceHandler->isSynchronizing) {
     57     return;
     58   }
     59   interfaceHandler->powerOn();
     60   interfaceHandler->isSynchronizing = true;
     61   interfaceHandler->syncDuration = 0;
     62 }
     63 
     64 void sync_abort(syncInterface *interfaceHandler) {
     65   if (!interfaceHandler->isSynchronizing) {
     66     return;
     67   }
     68   interfaceHandler->powerOff();
     69   interfaceHandler->isSynchronizing = false;
     70 }