text: /******************************************************************************
   * The MIT License
   *
   * Copyright (c) 2010 Perry Hung (from <libmaple/i2c.h>).
   * Copyright (c) 2012 LeafLabs, LLC.
   *
   * Permission is hereby granted, free of charge, to any person
   * obtaining a copy of this software and associated documentation
   * files (the "Software"), to deal in the Software without
   * restriction, including without limitation the rights to use, copy,
   * modify, merge, publish, distribute, sublicense, and/or sell copies
   * of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   *****************************************************************************/
  
  /**
   * @file libmaple/stm32f1/include/series/i2c.h
   * @brief STM32F1 I2C
   */
  
  #ifndef _LIBMAPLE_STM32F1_I2C_H_
  #define _LIBMAPLE_STM32F1_I2C_H_
  
  #include <libmaple/i2c_common.h>
  #include <libmaple/gpio.h>
  #include <libmaple/stm32.h>
  
  /*
   * Register maps
   */
  
  struct i2c_reg_map;
  
  /** STM32F1 I2C1 register map base pointer */
  #define I2C1_BASE               ((struct i2c_reg_map*)0x40005400)
  /** STM32F1 I2C2 register map base pointer */
  #define I2C2_BASE               ((struct i2c_reg_map*)0x40005800)
  
  /*
   * Devices
   */
  
  extern i2c_dev* const I2C1;
  extern i2c_dev* const I2C2;
  
  /*
   * For internal use
   */
  
  static inline uint32 _i2c_bus_clk(i2c_dev *dev __attribute__((unused))) {
      /* Both I2C peripherals are on APB1 */
      return STM32_PCLK1 / (1000 * 1000);
  }
  
  #define _I2C_HAVE_IRQ_FIXUP 1
  void _i2c_irq_priority_fixup(i2c_dev *dev);
  
  /*
   * Deprecated functionality
   */
  
  /* Flag to use alternate pin mapping in i2c_master_enable(). */
  #define _I2C_HAVE_DEPRECATED_I2C_REMAP 1
  #define I2C_REMAP 0x4
  static inline void _i2c_handle_remap(i2c_dev *dev, uint32 flags) {
      if ((dev == I2C1) && (flags & I2C_REMAP)) {
          afio_remap(AFIO_REMAP_I2C1);
          I2C1->sda_pin = 9;
          I2C1->scl_pin = 8;
      }
  }
  
  #endif  /* _LIBMAPLE_STM32F1_I2C_H_ */
  