src/main/drivers/bus_i2c_impl.h

   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 #pragma once
  22
  23 #include "platform.h"
  24
  25 #include "drivers/io_types.h"
  26 #include "drivers/rcc_types.h"
  27
  28 #define I2C_TIMEOUT_US          10000
  29 #define I2C_TIMEOUT_SYS_TICKS   (I2C_TIMEOUT_US / 1000)
  30
  31 #define I2C_PIN_SEL_MAX 4
  32
  33 typedef struct i2cPinDef_s {
  34     ioTag_t ioTag;
  35 #if defined(STM32F4) || defined(STM32H7) || defined(STM32G4)
  36     uint8_t af;
  37 #endif
  38 } i2cPinDef_t;
  39
  40 #if defined(STM32F4) || defined(STM32H7) || defined(STM32G4)
  41 #define I2CPINDEF(pin, af) { DEFIO_TAG_E(pin), af }
  42 #elif defined(STM32F1)
  43 #define I2CPINDEF(pin, af) { DEFIO_TAG_E(pin) }
  44 #else
  45 #define I2CPINDEF(pin) { DEFIO_TAG_E(pin) }
  46 #endif
  47
  48 typedef struct i2cHardware_s {
  49     I2CDevice device;
  50     I2C_TypeDef *reg;
  51     i2cPinDef_t sclPins[I2C_PIN_SEL_MAX];
  52     i2cPinDef_t sdaPins[I2C_PIN_SEL_MAX];
  53     rccPeriphTag_t rcc;
  54 #if !defined(STM32F303xC)
  55     uint8_t ev_irq;
  56     uint8_t er_irq;
  57 #endif
  58 } i2cHardware_t;
  59
  60 extern const i2cHardware_t i2cHardware[];
  61
  62 #if defined(STM32F1) || defined(STM32F4)
  63 typedef struct i2cState_s {
  64     volatile bool error;
  65     volatile bool busy;
  66     volatile uint8_t addr;
  67     volatile uint8_t reg;
  68     volatile uint8_t bytes;
  69     volatile uint8_t writing;
  70     volatile uint8_t reading;
  71     volatile uint8_t* write_p;
  72     volatile uint8_t* read_p;
  73 } i2cState_t;
  74 #endif
  75
  76 typedef struct i2cDevice_s {
  77     const i2cHardware_t *hardware;
  78     I2C_TypeDef *reg;
  79     IO_t scl;
  80     IO_t sda;
  81 #if defined(STM32F4) || defined(STM32H7) || defined(STM32G4)
  82     uint8_t sclAF;
  83     uint8_t sdaAF;
  84 #endif
  85     bool pullUp;
  86     uint16_t clockSpeed;
  87
  88     // MCU/Driver dependent member follows
  89 #if defined(STM32F1) || defined(STM32F4)
  90     i2cState_t state;
  91 #endif
  92 #ifdef USE_HAL_DRIVER
  93     I2C_HandleTypeDef handle;
  94 #endif
  95 } i2cDevice_t;
  96
  97 extern i2cDevice_t i2cDevice[];