src/main/drivers/gpio_stm32f30x.c

   1 /*
   2  * This file is part of Cleanflight.
   3  *
   4  * Cleanflight is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * Cleanflight is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <stdbool.h>
  19 #include <stdint.h>
  20
  21 #include "platform.h"
  22
  23 #include "build_config.h"
  24
  25 #include "gpio.h"
  26
  27 #define MODE_OFFSET 0
  28 #define PUPD_OFFSET 2
  29 #define OUTPUT_OFFSET 4
  30
  31 #define MODE_MASK ((1|2) << MODE_OFFSET)
  32 #define PUPD_MASK ((1|2) << PUPD_OFFSET)
  33 #define OUTPUT_MASK ((1|2) << OUTPUT_OFFSET)
  34
  35 //#define GPIO_Speed_10MHz GPIO_Speed_Level_1   Fast Speed:10MHz
  36 //#define GPIO_Speed_2MHz  GPIO_Speed_Level_2   Medium Speed:2MHz
  37 //#define GPIO_Speed_50MHz GPIO_Speed_Level_3   High Speed:50MHz
  38
  39 void gpioInit(GPIO_TypeDef *gpio, gpio_config_t *config)
  40 {
  41     GPIO_InitTypeDef GPIO_InitStructure;
  42
  43     uint32_t pinIndex;
  44     for (pinIndex = 0; pinIndex < 16; pinIndex++) {
  45         // are we doing this pin?
  46         uint32_t pinMask = (0x1 << pinIndex);
  47         if (config->pin & pinMask) {
  48
  49             GPIO_InitStructure.GPIO_Pin =  pinMask;
  50             GPIO_InitStructure.GPIO_Mode = (config->mode & MODE_MASK) >> MODE_OFFSET;
  51
  52             GPIOSpeed_TypeDef speed = GPIO_Speed_10MHz;
  53             switch (config->speed) {
  54                 case Speed_10MHz:
  55                     speed = GPIO_Speed_Level_1;
  56                     break;
  57                 case Speed_2MHz:
  58                     speed = GPIO_Speed_Level_2;
  59                     break;
  60                 case Speed_50MHz:
  61                     speed = GPIO_Speed_Level_3;
  62                     break;
  63             }
  64
  65             GPIO_InitStructure.GPIO_Speed = speed;
  66             GPIO_InitStructure.GPIO_OType = (config->mode & OUTPUT_MASK) >> OUTPUT_OFFSET;
  67             GPIO_InitStructure.GPIO_PuPd = (config->mode & PUPD_MASK) >> PUPD_OFFSET;
  68             GPIO_Init(gpio, &GPIO_InitStructure);
  69         }
  70     }
  71 }
  72
  73 void gpioExtiLineConfig(uint8_t portsrc, uint8_t pinsrc)
  74 {
  75     SYSCFG_EXTILineConfig(portsrc, pinsrc);
  76 }