src/main/drivers/pin_pull_up_down.c

   1 /*
   2  * This file is part of Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <stdint.h>
  22
  23 #include "platform.h"
  24
  25 #ifdef USE_PIN_PULL_UP_DOWN
  26
  27 #include "build/debug.h"
  28 #include "drivers/io.h"
  29 #include "pg/pin_pull_up_down.h"
  30 #include "pin_pull_up_down.h"
  31
  32
  33 static void initPin(const pinPullUpDownConfig_t* config, resourceOwner_e owner, uint8_t index)
  34 {
  35     IO_t io = IOGetByTag(config->ioTag);
  36     if (!io) {
  37         return;
  38     }
  39
  40     IOInit(io, owner, RESOURCE_INDEX(index));
  41
  42     if (owner == OWNER_PULLUP) {
  43         IOConfigGPIO(io, IOCFG_IPU);
  44     } else if (owner == OWNER_PULLDOWN) {
  45         IOConfigGPIO(io, IOCFG_IPD);
  46     }
  47 }
  48
  49 void pinPullupPulldownInit(void)
  50 {
  51     for (uint8_t i = 0; i < PIN_PULL_UP_DOWN_COUNT; i++) {
  52         initPin(pinPullupConfig(i), OWNER_PULLUP, i);
  53         initPin(pinPulldownConfig(i), OWNER_PULLDOWN, i);
  54     }
  55 }
  56
  57 #endif