105 lines
4.2 KiB
C
105 lines
4.2 KiB
C
/****************************************************************************
|
|
* arch/arm/src/stm32f0l0g0/stm32_i2c.h
|
|
*
|
|
* Copyright (C) 2009, 2011, 2013 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __ARCH_ARM_SRC_STM32F0L0G0_STM32_I2C_H
|
|
#define __ARCH_ARM_SRC_STM32F0L0G0_STM32_I2C_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <nuttx/i2c/i2c_master.h>
|
|
|
|
#include "chip.h"
|
|
#include "hardware/stm32_i2c.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* If a dynamic timeout is selected, then a non-negative, non-zero micro-
|
|
* seconds per byte value must be provided as well.
|
|
*/
|
|
|
|
#ifdef CONFIG_STM32F0L0G0_I2C_DYNTIMEO
|
|
# if CONFIG_STM32F0L0G0_I2C_DYNTIMEO_USECPERBYTE < 1
|
|
# warning "Ignoring CONFIG_STM32F0L0G0_I2C_DYNTIMEO because of CONFIG_STM32F0L0G0_I2C_DYNTIMEO_USECPERBYTE"
|
|
# undef CONFIG_STM32F0L0G0_I2C_DYNTIMEO
|
|
# endif
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_i2cbus_initialize
|
|
*
|
|
* Description:
|
|
* Initialize the selected I2C port. And return a unique instance of struct
|
|
* struct i2c_master_s. This function may be called to obtain multiple
|
|
* instances of the interface, each of which may be set up with a
|
|
* different frequency and slave address.
|
|
*
|
|
* Input Parameters:
|
|
* Port number (for hardware that has multiple I2C interfaces)
|
|
*
|
|
* Returned Value:
|
|
* Valid I2C device structure reference on success; a NULL on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct i2c_master_s *stm32_i2cbus_initialize(int port);
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_i2cbus_uninitialize
|
|
*
|
|
* Description:
|
|
* De-initialize the selected I2C port, and power down the device.
|
|
*
|
|
* Input Parameters:
|
|
* Device structure as returned by the stm32_i2cbus_initialize()
|
|
*
|
|
* Returned Value:
|
|
* OK on success, ERROR when internal reference count mismatch or dev
|
|
* points to invalid hardware device.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int stm32_i2cbus_uninitialize(FAR struct i2c_master_s *dev);
|
|
|
|
#endif /* __ARCH_ARM_SRC_STM32F0L0G0_STM32_I2C_H */
|