src/main/rx/pwm.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 <stdbool.h>
  22 #include <stdint.h>
  23 #include <stdlib.h>
  24
  25 #include <string.h>
  26
  27 #include "platform.h"
  28
  29 #if defined(USE_PWM) || defined(USE_PPM)
  30
  31 #include "common/utils.h"
  32
  33 #include "config/feature.h"
  34
  35 #include "pg/rx.h"
  36
  37 #include "drivers/rx/rx_pwm.h"
  38
  39 #include "config/config.h"
  40
  41 #include "rx/rx.h"
  42 #include "rx/pwm.h"
  43
  44 static float pwmReadRawRC(const rxRuntimeState_t *rxRuntimeState, uint8_t channel)
  45 {
  46     UNUSED(rxRuntimeState);
  47     return pwmRead(channel);
  48 }
  49
  50 static float ppmReadRawRC(const rxRuntimeState_t *rxRuntimeState, uint8_t channel)
  51 {
  52     UNUSED(rxRuntimeState);
  53     return ppmRead(channel);
  54 }
  55
  56 void rxPwmInit(const rxConfig_t *rxConfig, rxRuntimeState_t *rxRuntimeState)
  57 {
  58     UNUSED(rxConfig);
  59
  60     rxRuntimeState->rxRefreshRate = 20000;
  61
  62     // configure PWM/CPPM read function and max number of channels. serial rx below will override both of these, if enabled
  63     switch (rxRuntimeState->rxProvider) {
  64     default:
  65
  66         break;
  67     case RX_PROVIDER_PARALLEL_PWM:
  68         rxRuntimeState->channelCount = MAX_SUPPORTED_RC_PARALLEL_PWM_CHANNEL_COUNT;
  69         rxRuntimeState->rcReadRawFn = pwmReadRawRC;
  70
  71         break;
  72     case RX_PROVIDER_PPM:
  73         rxRuntimeState->channelCount = MAX_SUPPORTED_RC_PPM_CHANNEL_COUNT;
  74         rxRuntimeState->rcReadRawFn = ppmReadRawRC;
  75
  76         break;
  77     }
  78 }
  79 #endif