src/main/drivers/bus_i2c.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 #ifndef I2C_DEVICE
  29 #define I2C_DEVICE I2CINVALID
  30 #endif
  31
  32 typedef enum I2CDevice {
  33     I2CINVALID = -1,
  34     I2CDEV_1   = 0,
  35     I2CDEV_2,
  36     I2CDEV_3,
  37     I2CDEV_4,
  38 } I2CDevice;
  39
  40 #if defined(STM32F4) || defined(APM32F4)
  41 #define I2CDEV_COUNT 3
  42 #elif defined(STM32F7)
  43 #define I2CDEV_COUNT 4
  44 #else
  45 #define I2CDEV_COUNT 4
  46 #endif
  47
  48 // Macros to convert between CLI bus number and I2CDevice.
  49 #define I2C_CFG_TO_DEV(x)   ((x) - 1)
  50 #define I2C_DEV_TO_CFG(x)   ((x) + 1)
  51
  52 // I2C device address range in 7-bit address mode
  53 #define I2C_ADDR7_MIN       8
  54 #define I2C_ADDR7_MAX       119
  55
  56 struct i2cConfig_s;
  57 void i2cHardwareConfigure(const struct i2cConfig_s *i2cConfig);
  58 void i2cInit(I2CDevice device);
  59 bool i2cWriteBuffer(I2CDevice device, uint8_t addr_, uint8_t reg_, uint8_t len_, uint8_t *data);
  60 bool i2cWrite(I2CDevice device, uint8_t addr_, uint8_t reg, uint8_t data);
  61 bool i2cReadBuffer(I2CDevice device, uint8_t addr_, uint8_t reg, uint8_t len, uint8_t* buf);
  62 bool i2cRead(I2CDevice device, uint8_t addr_, uint8_t reg, uint8_t len, uint8_t* buf);
  63 bool i2cBusy(I2CDevice device, bool *error);
  64
  65 uint16_t i2cGetErrorCounter(void);
  66 uint8_t i2cGetRegisteredDeviceCount(void);