src/main/drivers/pinio.c

   1 /*
   2  * This file is part of Cleanflight and 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_PINIO
  26
  27 #include "build/debug.h"
  28
  29 #include "pg/pinio.h"
  30
  31 #include "drivers/io.h"
  32
  33 typedef struct pinioRuntime_s {
  34     IO_t io;
  35     bool inverted;
  36     bool state;
  37 } pinioRuntime_t;
  38
  39 static pinioRuntime_t pinioRuntime[PINIO_COUNT];
  40
  41 void pinioInit(const pinioConfig_t *pinioConfig)
  42 {
  43     for (int i = 0; i < PINIO_COUNT; i++) {
  44         IO_t io = IOGetByTag(pinioConfig->ioTag[i]);
  45
  46         if (!io) {
  47             continue;
  48         }
  49
  50         IOInit(io, OWNER_PINIO, RESOURCE_INDEX(i));
  51
  52         switch (pinioConfig->config[i] & PINIO_CONFIG_MODE_MASK) {
  53         case PINIO_CONFIG_MODE_OUT_PP:
  54             // Initial state after reset is input, pull-up.
  55             // Avoid momentary off by presetting the output to hi.
  56             if (pinioConfig->config[i] & PINIO_CONFIG_OUT_INVERTED) {
  57                 IOHi(io);
  58             }
  59             IOConfigGPIO(io, IOCFG_OUT_PP);
  60             break;
  61         }
  62
  63         if (pinioConfig->config[i] & PINIO_CONFIG_OUT_INVERTED)
  64         {
  65             pinioRuntime[i].inverted = true;
  66             IOHi(io);
  67             pinioRuntime[i].state = true;
  68         } else {
  69             pinioRuntime[i].inverted = false;
  70             IOLo(io);
  71             pinioRuntime[i].state = false;
  72         }
  73         pinioRuntime[i].io = io;
  74     }
  75 }
  76
  77 void pinioSet(int index, bool on)
  78 {
  79     bool newState = on ^ pinioRuntime[index].inverted;
  80     if (newState != pinioRuntime[index].state) {
  81         IOWrite(pinioRuntime[index].io, newState);
  82         pinioRuntime[index].state = newState;
  83     }
  84 }
  85 #endif