mbed-src-kl05 - mbed library sources

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mbed library sources

Dependents: frdm_kl05z_gpio_test

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targets/cmsis/TARGET_STM/TARGET_DISCO_F051R8/stm32f0xx_i2c.c@130:1dec54e4aec3, 2014-03-21 (annotated)

Committer:: mbed_official
Date:: Fri Mar 21 11:45:09 2014 +0000
Revision:: 130:1dec54e4aec3

Synchronized with git revision e5c9ff6781a4e277a5a454e5a0b037f76e31739d

Full URL: https://github.com/mbedmicro/mbed/commit/e5c9ff6781a4e277a5a454e5a0b037f76e31739d/

STM32F0-Discovery (STM32F051R8) initial port

Who changed what in which revision?

User	Revision	Line number	New contents of line
mbed_official	130:1dec54e4aec3	1	/**
mbed_official	130:1dec54e4aec3	2	******************************************************************************
mbed_official	130:1dec54e4aec3	3	* @file stm32f0xx_i2c.c
mbed_official	130:1dec54e4aec3	4	* @author MCD Application Team
mbed_official	130:1dec54e4aec3	5	* @version V1.3.0
mbed_official	130:1dec54e4aec3	6	* @date 16-January-2014
mbed_official	130:1dec54e4aec3	7	* @brief This file provides firmware functions to manage the following
mbed_official	130:1dec54e4aec3	8	* functionalities of the Inter-Integrated circuit (I2C):
mbed_official	130:1dec54e4aec3	9	* + Initialization and Configuration
mbed_official	130:1dec54e4aec3	10	* + Communications handling
mbed_official	130:1dec54e4aec3	11	* + SMBUS management
mbed_official	130:1dec54e4aec3	12	* + I2C registers management
mbed_official	130:1dec54e4aec3	13	* + Data transfers management
mbed_official	130:1dec54e4aec3	14	* + DMA transfers management
mbed_official	130:1dec54e4aec3	15	* + Interrupts and flags management
mbed_official	130:1dec54e4aec3	16	*
mbed_official	130:1dec54e4aec3	17	* @verbatim
mbed_official	130:1dec54e4aec3	18	============================================================================
mbed_official	130:1dec54e4aec3	19	##### How to use this driver #####
mbed_official	130:1dec54e4aec3	20	============================================================================
mbed_official	130:1dec54e4aec3	21	[..]
mbed_official	130:1dec54e4aec3	22	(#) Enable peripheral clock using RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2Cx, ENABLE)
mbed_official	130:1dec54e4aec3	23	function for I2C1 or I2C2.
mbed_official	130:1dec54e4aec3	24	(#) Enable SDA, SCL and SMBA (when used) GPIO clocks using
mbed_official	130:1dec54e4aec3	25	RCC_AHBPeriphClockCmd() function.
mbed_official	130:1dec54e4aec3	26	(#) Peripherals alternate function:
mbed_official	130:1dec54e4aec3	27	(++) Connect the pin to the desired peripherals' Alternate
mbed_official	130:1dec54e4aec3	28	Function (AF) using GPIO_PinAFConfig() function.
mbed_official	130:1dec54e4aec3	29	(++) Configure the desired pin in alternate function by:
mbed_official	130:1dec54e4aec3	30	GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
mbed_official	130:1dec54e4aec3	31	(++) Select the type, OpenDrain and speed via
mbed_official	130:1dec54e4aec3	32	GPIO_PuPd, GPIO_OType and GPIO_Speed members
mbed_official	130:1dec54e4aec3	33	(++) Call GPIO_Init() function.
mbed_official	130:1dec54e4aec3	34	(#) Program the Mode, Timing , Own address, Ack and Acknowledged Address
mbed_official	130:1dec54e4aec3	35	using the I2C_Init() function.
mbed_official	130:1dec54e4aec3	36	(#) Optionally you can enable/configure the following parameters without
mbed_official	130:1dec54e4aec3	37	re-initialization (i.e there is no need to call again I2C_Init() function):
mbed_official	130:1dec54e4aec3	38	(++) Enable the acknowledge feature using I2C_AcknowledgeConfig() function.
mbed_official	130:1dec54e4aec3	39	(++) Enable the dual addressing mode using I2C_DualAddressCmd() function.
mbed_official	130:1dec54e4aec3	40	(++) Enable the general call using the I2C_GeneralCallCmd() function.
mbed_official	130:1dec54e4aec3	41	(++) Enable the clock stretching using I2C_StretchClockCmd() function.
mbed_official	130:1dec54e4aec3	42	(++) Enable the PEC Calculation using I2C_CalculatePEC() function.
mbed_official	130:1dec54e4aec3	43	(++) For SMBus Mode:
mbed_official	130:1dec54e4aec3	44	(+++) Enable the SMBusAlert pin using I2C_SMBusAlertCmd() function.
mbed_official	130:1dec54e4aec3	45	(#) Enable the NVIC and the corresponding interrupt using the function
mbed_official	130:1dec54e4aec3	46	I2C_ITConfig() if you need to use interrupt mode.
mbed_official	130:1dec54e4aec3	47	(#) When using the DMA mode
mbed_official	130:1dec54e4aec3	48	(++) Configure the DMA using DMA_Init() function.
mbed_official	130:1dec54e4aec3	49	(++) Active the needed channel Request using I2C_DMACmd() function.
mbed_official	130:1dec54e4aec3	50	(#) Enable the I2C using the I2C_Cmd() function.
mbed_official	130:1dec54e4aec3	51	(#) Enable the DMA using the DMA_Cmd() function when using DMA mode in the
mbed_official	130:1dec54e4aec3	52	transfers.
mbed_official	130:1dec54e4aec3	53	[..]
mbed_official	130:1dec54e4aec3	54	(@) When using I2C in Fast Mode Plus, SCL and SDA pin 20mA current drive capability
mbed_official	130:1dec54e4aec3	55	must be enabled by setting the driving capability control bit in SYSCFG.
mbed_official	130:1dec54e4aec3	56
mbed_official	130:1dec54e4aec3	57	@endverbatim
mbed_official	130:1dec54e4aec3	58	******************************************************************************
mbed_official	130:1dec54e4aec3	59	* @attention
mbed_official	130:1dec54e4aec3	60	*
mbed_official	130:1dec54e4aec3	61	* <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official	130:1dec54e4aec3	62	*
mbed_official	130:1dec54e4aec3	63	* Redistribution and use in source and binary forms, with or without modification,
mbed_official	130:1dec54e4aec3	64	* are permitted provided that the following conditions are met:
mbed_official	130:1dec54e4aec3	65	* 1. Redistributions of source code must retain the above copyright notice,
mbed_official	130:1dec54e4aec3	66	* this list of conditions and the following disclaimer.
mbed_official	130:1dec54e4aec3	67	* 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official	130:1dec54e4aec3	68	* this list of conditions and the following disclaimer in the documentation
mbed_official	130:1dec54e4aec3	69	* and/or other materials provided with the distribution.
mbed_official	130:1dec54e4aec3	70	* 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official	130:1dec54e4aec3	71	* may be used to endorse or promote products derived from this software
mbed_official	130:1dec54e4aec3	72	* without specific prior written permission.
mbed_official	130:1dec54e4aec3	73	*
mbed_official	130:1dec54e4aec3	74	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official	130:1dec54e4aec3	75	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official	130:1dec54e4aec3	76	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official	130:1dec54e4aec3	77	* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official	130:1dec54e4aec3	78	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official	130:1dec54e4aec3	79	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official	130:1dec54e4aec3	80	* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official	130:1dec54e4aec3	81	* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official	130:1dec54e4aec3	82	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official	130:1dec54e4aec3	83	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official	130:1dec54e4aec3	84	*
mbed_official	130:1dec54e4aec3	85	******************************************************************************
mbed_official	130:1dec54e4aec3	86	*/
mbed_official	130:1dec54e4aec3	87
mbed_official	130:1dec54e4aec3	88	/* Includes ------------------------------------------------------------------*/
mbed_official	130:1dec54e4aec3	89	#include "stm32f0xx_i2c.h"
mbed_official	130:1dec54e4aec3	90	#include "stm32f0xx_rcc.h"
mbed_official	130:1dec54e4aec3	91
mbed_official	130:1dec54e4aec3	92	/** @addtogroup STM32F0xx_StdPeriph_Driver
mbed_official	130:1dec54e4aec3	93	* @{
mbed_official	130:1dec54e4aec3	94	*/
mbed_official	130:1dec54e4aec3	95
mbed_official	130:1dec54e4aec3	96	/** @defgroup I2C
mbed_official	130:1dec54e4aec3	97	* @brief I2C driver modules
mbed_official	130:1dec54e4aec3	98	* @{
mbed_official	130:1dec54e4aec3	99	*/
mbed_official	130:1dec54e4aec3	100
mbed_official	130:1dec54e4aec3	101	/* Private typedef -----------------------------------------------------------*/
mbed_official	130:1dec54e4aec3	102	/* Private define ------------------------------------------------------------*/
mbed_official	130:1dec54e4aec3	103
mbed_official	130:1dec54e4aec3	104	#define CR1_CLEAR_MASK ((uint32_t)0x00CFE0FF) /<! I2C CR1 clear register Mask /
mbed_official	130:1dec54e4aec3	105	#define CR2_CLEAR_MASK ((uint32_t)0x07FF7FFF) /<! I2C CR2 clear register Mask /
mbed_official	130:1dec54e4aec3	106	#define TIMING_CLEAR_MASK ((uint32_t)0xF0FFFFFF) /<! I2C TIMING clear register Mask /
mbed_official	130:1dec54e4aec3	107	#define ERROR_IT_MASK ((uint32_t)0x00003F00) /<! I2C Error interrupt register Mask /
mbed_official	130:1dec54e4aec3	108	#define TC_IT_MASK ((uint32_t)0x000000C0) /<! I2C TC interrupt register Mask /
mbed_official	130:1dec54e4aec3	109
mbed_official	130:1dec54e4aec3	110	/* Private macro -------------------------------------------------------------*/
mbed_official	130:1dec54e4aec3	111	/* Private variables ---------------------------------------------------------*/
mbed_official	130:1dec54e4aec3	112	/* Private function prototypes -----------------------------------------------*/
mbed_official	130:1dec54e4aec3	113	/* Private functions ---------------------------------------------------------*/
mbed_official	130:1dec54e4aec3	114
mbed_official	130:1dec54e4aec3	115	/** @defgroup I2C_Private_Functions
mbed_official	130:1dec54e4aec3	116	* @{
mbed_official	130:1dec54e4aec3	117	*/
mbed_official	130:1dec54e4aec3	118
mbed_official	130:1dec54e4aec3	119
mbed_official	130:1dec54e4aec3	120	/** @defgroup I2C_Group1 Initialization and Configuration functions
mbed_official	130:1dec54e4aec3	121	* @brief Initialization and Configuration functions
mbed_official	130:1dec54e4aec3	122	*
mbed_official	130:1dec54e4aec3	123	@verbatim
mbed_official	130:1dec54e4aec3	124	===============================================================================
mbed_official	130:1dec54e4aec3	125	##### Initialization and Configuration functions #####
mbed_official	130:1dec54e4aec3	126	===============================================================================
mbed_official	130:1dec54e4aec3	127	[..] This section provides a set of functions allowing to initialize the I2C Mode,
mbed_official	130:1dec54e4aec3	128	I2C Timing, I2C filters, I2C Addressing mode, I2C OwnAddress1.
mbed_official	130:1dec54e4aec3	129
mbed_official	130:1dec54e4aec3	130	[..] The I2C_Init() function follows the I2C configuration procedures (these procedures
mbed_official	130:1dec54e4aec3	131	are available in reference manual).
mbed_official	130:1dec54e4aec3	132
mbed_official	130:1dec54e4aec3	133	[..] When the Software Reset is performed using I2C_SoftwareResetCmd() function, the internal
mbed_official	130:1dec54e4aec3	134	states machines are reset and communication control bits, as well as status bits come
mbed_official	130:1dec54e4aec3	135	back to their reset value.
mbed_official	130:1dec54e4aec3	136
mbed_official	130:1dec54e4aec3	137	[..] Before enabling Stop mode using I2C_StopModeCmd() I2C Clock source must be set to
mbed_official	130:1dec54e4aec3	138	HSI and Digital filters must be disabled.
mbed_official	130:1dec54e4aec3	139
mbed_official	130:1dec54e4aec3	140	[..] Before enabling Own Address 2 via I2C_DualAddressCmd() function, OA2 and mask should be
mbed_official	130:1dec54e4aec3	141	configured using I2C_OwnAddress2Config() function.
mbed_official	130:1dec54e4aec3	142
mbed_official	130:1dec54e4aec3	143	[..] I2C_SlaveByteControlCmd() enable Slave byte control that allow user to get control of
mbed_official	130:1dec54e4aec3	144	each byte in slave mode when NBYTES is set to 0x01.
mbed_official	130:1dec54e4aec3	145
mbed_official	130:1dec54e4aec3	146	@endverbatim
mbed_official	130:1dec54e4aec3	147	* @{
mbed_official	130:1dec54e4aec3	148	*/
mbed_official	130:1dec54e4aec3	149
mbed_official	130:1dec54e4aec3	150	/**
mbed_official	130:1dec54e4aec3	151	* @brief Deinitializes the I2Cx peripheral registers to their default reset values.
mbed_official	130:1dec54e4aec3	152	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	153	* @retval None
mbed_official	130:1dec54e4aec3	154	*/
mbed_official	130:1dec54e4aec3	155	void I2C_DeInit(I2C_TypeDef* I2Cx)
mbed_official	130:1dec54e4aec3	156	{
mbed_official	130:1dec54e4aec3	157	/* Check the parameters */
mbed_official	130:1dec54e4aec3	158	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	159
mbed_official	130:1dec54e4aec3	160	if (I2Cx == I2C1)
mbed_official	130:1dec54e4aec3	161	{
mbed_official	130:1dec54e4aec3	162	/* Enable I2C1 reset state */
mbed_official	130:1dec54e4aec3	163	RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, ENABLE);
mbed_official	130:1dec54e4aec3	164	/* Release I2C1 from reset state */
mbed_official	130:1dec54e4aec3	165	RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, DISABLE);
mbed_official	130:1dec54e4aec3	166	}
mbed_official	130:1dec54e4aec3	167	else
mbed_official	130:1dec54e4aec3	168	{
mbed_official	130:1dec54e4aec3	169	/* Enable I2C2 reset state */
mbed_official	130:1dec54e4aec3	170	RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2, ENABLE);
mbed_official	130:1dec54e4aec3	171	/* Release I2C2 from reset state */
mbed_official	130:1dec54e4aec3	172	RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2, DISABLE);
mbed_official	130:1dec54e4aec3	173	}
mbed_official	130:1dec54e4aec3	174	}
mbed_official	130:1dec54e4aec3	175
mbed_official	130:1dec54e4aec3	176	/**
mbed_official	130:1dec54e4aec3	177	* @brief Initializes the I2Cx peripheral according to the specified
mbed_official	130:1dec54e4aec3	178	* parameters in the I2C_InitStruct.
mbed_official	130:1dec54e4aec3	179	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	180	* @param I2C_InitStruct: pointer to a I2C_InitTypeDef structure that
mbed_official	130:1dec54e4aec3	181	* contains the configuration information for the specified I2C peripheral.
mbed_official	130:1dec54e4aec3	182	* @retval None
mbed_official	130:1dec54e4aec3	183	*/
mbed_official	130:1dec54e4aec3	184	void I2C_Init(I2C_TypeDef* I2Cx, I2C_InitTypeDef* I2C_InitStruct)
mbed_official	130:1dec54e4aec3	185	{
mbed_official	130:1dec54e4aec3	186	uint32_t tmpreg = 0;
mbed_official	130:1dec54e4aec3	187
mbed_official	130:1dec54e4aec3	188	/* Check the parameters */
mbed_official	130:1dec54e4aec3	189	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	190	assert_param(IS_I2C_ANALOG_FILTER(I2C_InitStruct->I2C_AnalogFilter));
mbed_official	130:1dec54e4aec3	191	assert_param(IS_I2C_DIGITAL_FILTER(I2C_InitStruct->I2C_DigitalFilter));
mbed_official	130:1dec54e4aec3	192	assert_param(IS_I2C_MODE(I2C_InitStruct->I2C_Mode));
mbed_official	130:1dec54e4aec3	193	assert_param(IS_I2C_OWN_ADDRESS1(I2C_InitStruct->I2C_OwnAddress1));
mbed_official	130:1dec54e4aec3	194	assert_param(IS_I2C_ACK(I2C_InitStruct->I2C_Ack));
mbed_official	130:1dec54e4aec3	195	assert_param(IS_I2C_ACKNOWLEDGE_ADDRESS(I2C_InitStruct->I2C_AcknowledgedAddress));
mbed_official	130:1dec54e4aec3	196
mbed_official	130:1dec54e4aec3	197	/* Disable I2Cx Peripheral */
mbed_official	130:1dec54e4aec3	198	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_CR1_PE);
mbed_official	130:1dec54e4aec3	199
mbed_official	130:1dec54e4aec3	200	/---------------------------- I2Cx FILTERS Configuration ------------------/
mbed_official	130:1dec54e4aec3	201	/* Get the I2Cx CR1 value */
mbed_official	130:1dec54e4aec3	202	tmpreg = I2Cx->CR1;
mbed_official	130:1dec54e4aec3	203	/* Clear I2Cx CR1 register */
mbed_official	130:1dec54e4aec3	204	tmpreg &= CR1_CLEAR_MASK;
mbed_official	130:1dec54e4aec3	205	/* Configure I2Cx: analog and digital filter */
mbed_official	130:1dec54e4aec3	206	/* Set ANFOFF bit according to I2C_AnalogFilter value */
mbed_official	130:1dec54e4aec3	207	/* Set DFN bits according to I2C_DigitalFilter value */
mbed_official	130:1dec54e4aec3	208	tmpreg \|= (uint32_t)I2C_InitStruct->I2C_AnalogFilter \|(I2C_InitStruct->I2C_DigitalFilter << 8);
mbed_official	130:1dec54e4aec3	209
mbed_official	130:1dec54e4aec3	210	/* Write to I2Cx CR1 */
mbed_official	130:1dec54e4aec3	211	I2Cx->CR1 = tmpreg;
mbed_official	130:1dec54e4aec3	212
mbed_official	130:1dec54e4aec3	213	/---------------------------- I2Cx TIMING Configuration -------------------/
mbed_official	130:1dec54e4aec3	214	/* Configure I2Cx: Timing */
mbed_official	130:1dec54e4aec3	215	/* Set TIMINGR bits according to I2C_Timing */
mbed_official	130:1dec54e4aec3	216	/* Write to I2Cx TIMING */
mbed_official	130:1dec54e4aec3	217	I2Cx->TIMINGR = I2C_InitStruct->I2C_Timing & TIMING_CLEAR_MASK;
mbed_official	130:1dec54e4aec3	218
mbed_official	130:1dec54e4aec3	219	/* Enable I2Cx Peripheral */
mbed_official	130:1dec54e4aec3	220	I2Cx->CR1 \|= I2C_CR1_PE;
mbed_official	130:1dec54e4aec3	221
mbed_official	130:1dec54e4aec3	222	/---------------------------- I2Cx OAR1 Configuration ---------------------/
mbed_official	130:1dec54e4aec3	223	/* Clear tmpreg local variable */
mbed_official	130:1dec54e4aec3	224	tmpreg = 0;
mbed_official	130:1dec54e4aec3	225	/* Clear OAR1 register */
mbed_official	130:1dec54e4aec3	226	I2Cx->OAR1 = (uint32_t)tmpreg;
mbed_official	130:1dec54e4aec3	227	/* Clear OAR2 register */
mbed_official	130:1dec54e4aec3	228	I2Cx->OAR2 = (uint32_t)tmpreg;
mbed_official	130:1dec54e4aec3	229	/* Configure I2Cx: Own Address1 and acknowledged address */
mbed_official	130:1dec54e4aec3	230	/* Set OA1MODE bit according to I2C_AcknowledgedAddress value */
mbed_official	130:1dec54e4aec3	231	/* Set OA1 bits according to I2C_OwnAddress1 value */
mbed_official	130:1dec54e4aec3	232	tmpreg = (uint32_t)((uint32_t)I2C_InitStruct->I2C_AcknowledgedAddress \| \
mbed_official	130:1dec54e4aec3	233	(uint32_t)I2C_InitStruct->I2C_OwnAddress1);
mbed_official	130:1dec54e4aec3	234	/* Write to I2Cx OAR1 */
mbed_official	130:1dec54e4aec3	235	I2Cx->OAR1 = tmpreg;
mbed_official	130:1dec54e4aec3	236	/* Enable Own Address1 acknowledgement */
mbed_official	130:1dec54e4aec3	237	I2Cx->OAR1 \|= I2C_OAR1_OA1EN;
mbed_official	130:1dec54e4aec3	238
mbed_official	130:1dec54e4aec3	239	/---------------------------- I2Cx MODE Configuration ---------------------/
mbed_official	130:1dec54e4aec3	240	/* Configure I2Cx: mode */
mbed_official	130:1dec54e4aec3	241	/* Set SMBDEN and SMBHEN bits according to I2C_Mode value */
mbed_official	130:1dec54e4aec3	242	tmpreg = I2C_InitStruct->I2C_Mode;
mbed_official	130:1dec54e4aec3	243	/* Write to I2Cx CR1 */
mbed_official	130:1dec54e4aec3	244	I2Cx->CR1 \|= tmpreg;
mbed_official	130:1dec54e4aec3	245
mbed_official	130:1dec54e4aec3	246	/---------------------------- I2Cx ACK Configuration ----------------------/
mbed_official	130:1dec54e4aec3	247	/* Get the I2Cx CR2 value */
mbed_official	130:1dec54e4aec3	248	tmpreg = I2Cx->CR2;
mbed_official	130:1dec54e4aec3	249	/* Clear I2Cx CR2 register */
mbed_official	130:1dec54e4aec3	250	tmpreg &= CR2_CLEAR_MASK;
mbed_official	130:1dec54e4aec3	251	/* Configure I2Cx: acknowledgement */
mbed_official	130:1dec54e4aec3	252	/* Set NACK bit according to I2C_Ack value */
mbed_official	130:1dec54e4aec3	253	tmpreg \|= I2C_InitStruct->I2C_Ack;
mbed_official	130:1dec54e4aec3	254	/* Write to I2Cx CR2 */
mbed_official	130:1dec54e4aec3	255	I2Cx->CR2 = tmpreg;
mbed_official	130:1dec54e4aec3	256	}
mbed_official	130:1dec54e4aec3	257
mbed_official	130:1dec54e4aec3	258	/**
mbed_official	130:1dec54e4aec3	259	* @brief Fills each I2C_InitStruct member with its default value.
mbed_official	130:1dec54e4aec3	260	* @param I2C_InitStruct: pointer to an I2C_InitTypeDef structure which will be initialized.
mbed_official	130:1dec54e4aec3	261	* @retval None
mbed_official	130:1dec54e4aec3	262	*/
mbed_official	130:1dec54e4aec3	263	void I2C_StructInit(I2C_InitTypeDef* I2C_InitStruct)
mbed_official	130:1dec54e4aec3	264	{
mbed_official	130:1dec54e4aec3	265	/---------------- Reset I2C init structure parameters values --------------/
mbed_official	130:1dec54e4aec3	266	/* Initialize the I2C_Timing member */
mbed_official	130:1dec54e4aec3	267	I2C_InitStruct->I2C_Timing = 0;
mbed_official	130:1dec54e4aec3	268	/* Initialize the I2C_AnalogFilter member */
mbed_official	130:1dec54e4aec3	269	I2C_InitStruct->I2C_AnalogFilter = I2C_AnalogFilter_Enable;
mbed_official	130:1dec54e4aec3	270	/* Initialize the I2C_DigitalFilter member */
mbed_official	130:1dec54e4aec3	271	I2C_InitStruct->I2C_DigitalFilter = 0;
mbed_official	130:1dec54e4aec3	272	/* Initialize the I2C_Mode member */
mbed_official	130:1dec54e4aec3	273	I2C_InitStruct->I2C_Mode = I2C_Mode_I2C;
mbed_official	130:1dec54e4aec3	274	/* Initialize the I2C_OwnAddress1 member */
mbed_official	130:1dec54e4aec3	275	I2C_InitStruct->I2C_OwnAddress1 = 0;
mbed_official	130:1dec54e4aec3	276	/* Initialize the I2C_Ack member */
mbed_official	130:1dec54e4aec3	277	I2C_InitStruct->I2C_Ack = I2C_Ack_Disable;
mbed_official	130:1dec54e4aec3	278	/* Initialize the I2C_AcknowledgedAddress member */
mbed_official	130:1dec54e4aec3	279	I2C_InitStruct->I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
mbed_official	130:1dec54e4aec3	280	}
mbed_official	130:1dec54e4aec3	281
mbed_official	130:1dec54e4aec3	282	/**
mbed_official	130:1dec54e4aec3	283	* @brief Enables or disables the specified I2C peripheral.
mbed_official	130:1dec54e4aec3	284	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	285	* @param NewState: new state of the I2Cx peripheral.
mbed_official	130:1dec54e4aec3	286	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	287	* @retval None
mbed_official	130:1dec54e4aec3	288	*/
mbed_official	130:1dec54e4aec3	289	void I2C_Cmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	290	{
mbed_official	130:1dec54e4aec3	291	/* Check the parameters */
mbed_official	130:1dec54e4aec3	292	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	293	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	294	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	295	{
mbed_official	130:1dec54e4aec3	296	/* Enable the selected I2C peripheral */
mbed_official	130:1dec54e4aec3	297	I2Cx->CR1 \|= I2C_CR1_PE;
mbed_official	130:1dec54e4aec3	298	}
mbed_official	130:1dec54e4aec3	299	else
mbed_official	130:1dec54e4aec3	300	{
mbed_official	130:1dec54e4aec3	301	/* Disable the selected I2C peripheral */
mbed_official	130:1dec54e4aec3	302	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_CR1_PE);
mbed_official	130:1dec54e4aec3	303	}
mbed_official	130:1dec54e4aec3	304	}
mbed_official	130:1dec54e4aec3	305
mbed_official	130:1dec54e4aec3	306	/**
mbed_official	130:1dec54e4aec3	307	* @brief Enables or disables the specified I2C software reset.
mbed_official	130:1dec54e4aec3	308	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	309	* @retval None
mbed_official	130:1dec54e4aec3	310	*/
mbed_official	130:1dec54e4aec3	311	void I2C_SoftwareResetCmd(I2C_TypeDef* I2Cx)
mbed_official	130:1dec54e4aec3	312	{
mbed_official	130:1dec54e4aec3	313	/* Check the parameters */
mbed_official	130:1dec54e4aec3	314	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	315
mbed_official	130:1dec54e4aec3	316	/* Disable peripheral */
mbed_official	130:1dec54e4aec3	317	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_CR1_PE);
mbed_official	130:1dec54e4aec3	318
mbed_official	130:1dec54e4aec3	319	/* Perform a dummy read to delay the disable of peripheral for minimum
mbed_official	130:1dec54e4aec3	320	3 APB clock cycles to perform the software reset functionality */
mbed_official	130:1dec54e4aec3	321	(__IO uint32_t )(uint32_t)I2Cx;
mbed_official	130:1dec54e4aec3	322
mbed_official	130:1dec54e4aec3	323	/* Enable peripheral */
mbed_official	130:1dec54e4aec3	324	I2Cx->CR1 \|= I2C_CR1_PE;
mbed_official	130:1dec54e4aec3	325	}
mbed_official	130:1dec54e4aec3	326
mbed_official	130:1dec54e4aec3	327	/**
mbed_official	130:1dec54e4aec3	328	* @brief Enables or disables the specified I2C interrupts.
mbed_official	130:1dec54e4aec3	329	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	330	* @param I2C_IT: specifies the I2C interrupts sources to be enabled or disabled.
mbed_official	130:1dec54e4aec3	331	* This parameter can be any combination of the following values:
mbed_official	130:1dec54e4aec3	332	* @arg I2C_IT_ERRI: Error interrupt mask
mbed_official	130:1dec54e4aec3	333	* @arg I2C_IT_TCI: Transfer Complete interrupt mask
mbed_official	130:1dec54e4aec3	334	* @arg I2C_IT_STOPI: Stop Detection interrupt mask
mbed_official	130:1dec54e4aec3	335	* @arg I2C_IT_NACKI: Not Acknowledge received interrupt mask
mbed_official	130:1dec54e4aec3	336	* @arg I2C_IT_ADDRI: Address Match interrupt mask
mbed_official	130:1dec54e4aec3	337	* @arg I2C_IT_RXI: RX interrupt mask
mbed_official	130:1dec54e4aec3	338	* @arg I2C_IT_TXI: TX interrupt mask
mbed_official	130:1dec54e4aec3	339	* @param NewState: new state of the specified I2C interrupts.
mbed_official	130:1dec54e4aec3	340	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	341	* @retval None
mbed_official	130:1dec54e4aec3	342	*/
mbed_official	130:1dec54e4aec3	343	void I2C_ITConfig(I2C_TypeDef* I2Cx, uint32_t I2C_IT, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	344	{
mbed_official	130:1dec54e4aec3	345	/* Check the parameters */
mbed_official	130:1dec54e4aec3	346	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	347	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	348	assert_param(IS_I2C_CONFIG_IT(I2C_IT));
mbed_official	130:1dec54e4aec3	349
mbed_official	130:1dec54e4aec3	350	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	351	{
mbed_official	130:1dec54e4aec3	352	/* Enable the selected I2C interrupts */
mbed_official	130:1dec54e4aec3	353	I2Cx->CR1 \|= I2C_IT;
mbed_official	130:1dec54e4aec3	354	}
mbed_official	130:1dec54e4aec3	355	else
mbed_official	130:1dec54e4aec3	356	{
mbed_official	130:1dec54e4aec3	357	/* Disable the selected I2C interrupts */
mbed_official	130:1dec54e4aec3	358	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_IT);
mbed_official	130:1dec54e4aec3	359	}
mbed_official	130:1dec54e4aec3	360	}
mbed_official	130:1dec54e4aec3	361
mbed_official	130:1dec54e4aec3	362	/**
mbed_official	130:1dec54e4aec3	363	* @brief Enables or disables the I2C Clock stretching.
mbed_official	130:1dec54e4aec3	364	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	365	* @param NewState: new state of the I2Cx Clock stretching.
mbed_official	130:1dec54e4aec3	366	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	367	* @retval None
mbed_official	130:1dec54e4aec3	368	*/
mbed_official	130:1dec54e4aec3	369	void I2C_StretchClockCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	370	{
mbed_official	130:1dec54e4aec3	371	/* Check the parameters */
mbed_official	130:1dec54e4aec3	372	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	373	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	374
mbed_official	130:1dec54e4aec3	375	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	376	{
mbed_official	130:1dec54e4aec3	377	/* Enable clock stretching */
mbed_official	130:1dec54e4aec3	378	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_CR1_NOSTRETCH);
mbed_official	130:1dec54e4aec3	379	}
mbed_official	130:1dec54e4aec3	380	else
mbed_official	130:1dec54e4aec3	381	{
mbed_official	130:1dec54e4aec3	382	/* Disable clock stretching */
mbed_official	130:1dec54e4aec3	383	I2Cx->CR1 \|= I2C_CR1_NOSTRETCH;
mbed_official	130:1dec54e4aec3	384	}
mbed_official	130:1dec54e4aec3	385	}
mbed_official	130:1dec54e4aec3	386
mbed_official	130:1dec54e4aec3	387	/**
mbed_official	130:1dec54e4aec3	388	* @brief Enables or disables I2C wakeup from stop mode.
mbed_official	130:1dec54e4aec3	389	* This function is not applicable for STM32F030 devices.
mbed_official	130:1dec54e4aec3	390	* @param I2Cx: where x can be 1 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	391	* @param NewState: new state of the I2Cx stop mode.
mbed_official	130:1dec54e4aec3	392	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	393	* @retval None
mbed_official	130:1dec54e4aec3	394	*/
mbed_official	130:1dec54e4aec3	395	void I2C_StopModeCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	396	{
mbed_official	130:1dec54e4aec3	397	/* Check the parameters */
mbed_official	130:1dec54e4aec3	398	assert_param(IS_I2C_1_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	399	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	400
mbed_official	130:1dec54e4aec3	401	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	402	{
mbed_official	130:1dec54e4aec3	403	/* Enable wakeup from stop mode */
mbed_official	130:1dec54e4aec3	404	I2Cx->CR1 \|= I2C_CR1_WUPEN;
mbed_official	130:1dec54e4aec3	405	}
mbed_official	130:1dec54e4aec3	406	else
mbed_official	130:1dec54e4aec3	407	{
mbed_official	130:1dec54e4aec3	408	/* Disable wakeup from stop mode */
mbed_official	130:1dec54e4aec3	409	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_CR1_WUPEN);
mbed_official	130:1dec54e4aec3	410	}
mbed_official	130:1dec54e4aec3	411	}
mbed_official	130:1dec54e4aec3	412
mbed_official	130:1dec54e4aec3	413	/**
mbed_official	130:1dec54e4aec3	414	* @brief Enables or disables the I2C own address 2.
mbed_official	130:1dec54e4aec3	415	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	416	* @param NewState: new state of the I2C own address 2.
mbed_official	130:1dec54e4aec3	417	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	418	* @retval None
mbed_official	130:1dec54e4aec3	419	*/
mbed_official	130:1dec54e4aec3	420	void I2C_DualAddressCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	421	{
mbed_official	130:1dec54e4aec3	422	/* Check the parameters */
mbed_official	130:1dec54e4aec3	423	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	424	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	425
mbed_official	130:1dec54e4aec3	426	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	427	{
mbed_official	130:1dec54e4aec3	428	/* Enable own address 2 */
mbed_official	130:1dec54e4aec3	429	I2Cx->OAR2 \|= I2C_OAR2_OA2EN;
mbed_official	130:1dec54e4aec3	430	}
mbed_official	130:1dec54e4aec3	431	else
mbed_official	130:1dec54e4aec3	432	{
mbed_official	130:1dec54e4aec3	433	/* Disable own address 2 */
mbed_official	130:1dec54e4aec3	434	I2Cx->OAR2 &= (uint32_t)~((uint32_t)I2C_OAR2_OA2EN);
mbed_official	130:1dec54e4aec3	435	}
mbed_official	130:1dec54e4aec3	436	}
mbed_official	130:1dec54e4aec3	437
mbed_official	130:1dec54e4aec3	438	/**
mbed_official	130:1dec54e4aec3	439	* @brief Configures the I2C slave own address 2 and mask.
mbed_official	130:1dec54e4aec3	440	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	441	* @param Address: specifies the slave address to be programmed.
mbed_official	130:1dec54e4aec3	442	* @param Mask: specifies own address 2 mask to be programmed.
mbed_official	130:1dec54e4aec3	443	* This parameter can be one of the following values:
mbed_official	130:1dec54e4aec3	444	* @arg I2C_OA2_NoMask: no mask.
mbed_official	130:1dec54e4aec3	445	* @arg I2C_OA2_Mask01: OA2[1] is masked and don't care.
mbed_official	130:1dec54e4aec3	446	* @arg I2C_OA2_Mask02: OA2[2:1] are masked and don't care.
mbed_official	130:1dec54e4aec3	447	* @arg I2C_OA2_Mask03: OA2[3:1] are masked and don't care.
mbed_official	130:1dec54e4aec3	448	* @arg I2C_OA2_Mask04: OA2[4:1] are masked and don't care.
mbed_official	130:1dec54e4aec3	449	* @arg I2C_OA2_Mask05: OA2[5:1] are masked and don't care.
mbed_official	130:1dec54e4aec3	450	* @arg I2C_OA2_Mask06: OA2[6:1] are masked and don't care.
mbed_official	130:1dec54e4aec3	451	* @arg I2C_OA2_Mask07: OA2[7:1] are masked and don't care.
mbed_official	130:1dec54e4aec3	452	* @retval None
mbed_official	130:1dec54e4aec3	453	*/
mbed_official	130:1dec54e4aec3	454	void I2C_OwnAddress2Config(I2C_TypeDef* I2Cx, uint16_t Address, uint8_t Mask)
mbed_official	130:1dec54e4aec3	455	{
mbed_official	130:1dec54e4aec3	456	uint32_t tmpreg = 0;
mbed_official	130:1dec54e4aec3	457
mbed_official	130:1dec54e4aec3	458	/* Check the parameters */
mbed_official	130:1dec54e4aec3	459	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	460	assert_param(IS_I2C_OWN_ADDRESS2(Address));
mbed_official	130:1dec54e4aec3	461	assert_param(IS_I2C_OWN_ADDRESS2_MASK(Mask));
mbed_official	130:1dec54e4aec3	462
mbed_official	130:1dec54e4aec3	463	/* Get the old register value */
mbed_official	130:1dec54e4aec3	464	tmpreg = I2Cx->OAR2;
mbed_official	130:1dec54e4aec3	465
mbed_official	130:1dec54e4aec3	466	/* Reset I2Cx OA2 bit [7:1] and OA2MSK bit [1:0] */
mbed_official	130:1dec54e4aec3	467	tmpreg &= (uint32_t)~((uint32_t)(I2C_OAR2_OA2 \| I2C_OAR2_OA2MSK));
mbed_official	130:1dec54e4aec3	468
mbed_official	130:1dec54e4aec3	469	/* Set I2Cx SADD */
mbed_official	130:1dec54e4aec3	470	tmpreg \|= (uint32_t)(((uint32_t)Address & I2C_OAR2_OA2) \| \
mbed_official	130:1dec54e4aec3	471	(((uint32_t)Mask << 8) & I2C_OAR2_OA2MSK)) ;
mbed_official	130:1dec54e4aec3	472
mbed_official	130:1dec54e4aec3	473	/* Store the new register value */
mbed_official	130:1dec54e4aec3	474	I2Cx->OAR2 = tmpreg;
mbed_official	130:1dec54e4aec3	475	}
mbed_official	130:1dec54e4aec3	476
mbed_official	130:1dec54e4aec3	477	/**
mbed_official	130:1dec54e4aec3	478	* @brief Enables or disables the I2C general call mode.
mbed_official	130:1dec54e4aec3	479	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	480	* @param NewState: new state of the I2C general call mode.
mbed_official	130:1dec54e4aec3	481	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	482	* @retval None
mbed_official	130:1dec54e4aec3	483	*/
mbed_official	130:1dec54e4aec3	484	void I2C_GeneralCallCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	485	{
mbed_official	130:1dec54e4aec3	486	/* Check the parameters */
mbed_official	130:1dec54e4aec3	487	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	488	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	489
mbed_official	130:1dec54e4aec3	490	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	491	{
mbed_official	130:1dec54e4aec3	492	/* Enable general call mode */
mbed_official	130:1dec54e4aec3	493	I2Cx->CR1 \|= I2C_CR1_GCEN;
mbed_official	130:1dec54e4aec3	494	}
mbed_official	130:1dec54e4aec3	495	else
mbed_official	130:1dec54e4aec3	496	{
mbed_official	130:1dec54e4aec3	497	/* Disable general call mode */
mbed_official	130:1dec54e4aec3	498	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_CR1_GCEN);
mbed_official	130:1dec54e4aec3	499	}
mbed_official	130:1dec54e4aec3	500	}
mbed_official	130:1dec54e4aec3	501
mbed_official	130:1dec54e4aec3	502	/**
mbed_official	130:1dec54e4aec3	503	* @brief Enables or disables the I2C slave byte control.
mbed_official	130:1dec54e4aec3	504	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	505	* @param NewState: new state of the I2C slave byte control.
mbed_official	130:1dec54e4aec3	506	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	507	* @retval None
mbed_official	130:1dec54e4aec3	508	*/
mbed_official	130:1dec54e4aec3	509	void I2C_SlaveByteControlCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	510	{
mbed_official	130:1dec54e4aec3	511	/* Check the parameters */
mbed_official	130:1dec54e4aec3	512	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	513	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	514
mbed_official	130:1dec54e4aec3	515	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	516	{
mbed_official	130:1dec54e4aec3	517	/* Enable slave byte control */
mbed_official	130:1dec54e4aec3	518	I2Cx->CR1 \|= I2C_CR1_SBC;
mbed_official	130:1dec54e4aec3	519	}
mbed_official	130:1dec54e4aec3	520	else
mbed_official	130:1dec54e4aec3	521	{
mbed_official	130:1dec54e4aec3	522	/* Disable slave byte control */
mbed_official	130:1dec54e4aec3	523	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_CR1_SBC);
mbed_official	130:1dec54e4aec3	524	}
mbed_official	130:1dec54e4aec3	525	}
mbed_official	130:1dec54e4aec3	526
mbed_official	130:1dec54e4aec3	527	/**
mbed_official	130:1dec54e4aec3	528	* @brief Configures the slave address to be transmitted after start generation.
mbed_official	130:1dec54e4aec3	529	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	530	* @param Address: specifies the slave address to be programmed.
mbed_official	130:1dec54e4aec3	531	* @note This function should be called before generating start condition.
mbed_official	130:1dec54e4aec3	532	* @retval None
mbed_official	130:1dec54e4aec3	533	*/
mbed_official	130:1dec54e4aec3	534	void I2C_SlaveAddressConfig(I2C_TypeDef* I2Cx, uint16_t Address)
mbed_official	130:1dec54e4aec3	535	{
mbed_official	130:1dec54e4aec3	536	uint32_t tmpreg = 0;
mbed_official	130:1dec54e4aec3	537
mbed_official	130:1dec54e4aec3	538	/* Check the parameters */
mbed_official	130:1dec54e4aec3	539	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	540	assert_param(IS_I2C_SLAVE_ADDRESS(Address));
mbed_official	130:1dec54e4aec3	541
mbed_official	130:1dec54e4aec3	542	/* Get the old register value */
mbed_official	130:1dec54e4aec3	543	tmpreg = I2Cx->CR2;
mbed_official	130:1dec54e4aec3	544
mbed_official	130:1dec54e4aec3	545	/* Reset I2Cx SADD bit [9:0] */
mbed_official	130:1dec54e4aec3	546	tmpreg &= (uint32_t)~((uint32_t)I2C_CR2_SADD);
mbed_official	130:1dec54e4aec3	547
mbed_official	130:1dec54e4aec3	548	/* Set I2Cx SADD */
mbed_official	130:1dec54e4aec3	549	tmpreg \|= (uint32_t)((uint32_t)Address & I2C_CR2_SADD);
mbed_official	130:1dec54e4aec3	550
mbed_official	130:1dec54e4aec3	551	/* Store the new register value */
mbed_official	130:1dec54e4aec3	552	I2Cx->CR2 = tmpreg;
mbed_official	130:1dec54e4aec3	553	}
mbed_official	130:1dec54e4aec3	554
mbed_official	130:1dec54e4aec3	555	/**
mbed_official	130:1dec54e4aec3	556	* @brief Enables or disables the I2C 10-bit addressing mode for the master.
mbed_official	130:1dec54e4aec3	557	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	558	* @param NewState: new state of the I2C 10-bit addressing mode.
mbed_official	130:1dec54e4aec3	559	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	560	* @note This function should be called before generating start condition.
mbed_official	130:1dec54e4aec3	561	* @retval None
mbed_official	130:1dec54e4aec3	562	*/
mbed_official	130:1dec54e4aec3	563	void I2C_10BitAddressingModeCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	564	{
mbed_official	130:1dec54e4aec3	565	/* Check the parameters */
mbed_official	130:1dec54e4aec3	566	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	567	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	568
mbed_official	130:1dec54e4aec3	569	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	570	{
mbed_official	130:1dec54e4aec3	571	/* Enable 10-bit addressing mode */
mbed_official	130:1dec54e4aec3	572	I2Cx->CR2 \|= I2C_CR2_ADD10;
mbed_official	130:1dec54e4aec3	573	}
mbed_official	130:1dec54e4aec3	574	else
mbed_official	130:1dec54e4aec3	575	{
mbed_official	130:1dec54e4aec3	576	/* Disable 10-bit addressing mode */
mbed_official	130:1dec54e4aec3	577	I2Cx->CR2 &= (uint32_t)~((uint32_t)I2C_CR2_ADD10);
mbed_official	130:1dec54e4aec3	578	}
mbed_official	130:1dec54e4aec3	579	}
mbed_official	130:1dec54e4aec3	580
mbed_official	130:1dec54e4aec3	581	/**
mbed_official	130:1dec54e4aec3	582	* @}
mbed_official	130:1dec54e4aec3	583	*/
mbed_official	130:1dec54e4aec3	584
mbed_official	130:1dec54e4aec3	585
mbed_official	130:1dec54e4aec3	586	/** @defgroup I2C_Group2 Communications handling functions
mbed_official	130:1dec54e4aec3	587	* @brief Communications handling functions
mbed_official	130:1dec54e4aec3	588	*
mbed_official	130:1dec54e4aec3	589	@verbatim
mbed_official	130:1dec54e4aec3	590	===============================================================================
mbed_official	130:1dec54e4aec3	591	##### Communications handling functions #####
mbed_official	130:1dec54e4aec3	592	===============================================================================
mbed_official	130:1dec54e4aec3	593	[..] This section provides a set of functions that handles I2C communication.
mbed_official	130:1dec54e4aec3	594
mbed_official	130:1dec54e4aec3	595	[..] Automatic End mode is enabled using I2C_AutoEndCmd() function. When Reload
mbed_official	130:1dec54e4aec3	596	mode is enabled via I2C_ReloadCmd() AutoEnd bit has no effect.
mbed_official	130:1dec54e4aec3	597
mbed_official	130:1dec54e4aec3	598	[..] I2C_NumberOfBytesConfig() function set the number of bytes to be transferred,
mbed_official	130:1dec54e4aec3	599	this configuration should be done before generating start condition in master
mbed_official	130:1dec54e4aec3	600	mode.
mbed_official	130:1dec54e4aec3	601
mbed_official	130:1dec54e4aec3	602	[..] When switching from master write operation to read operation in 10Bit addressing
mbed_official	130:1dec54e4aec3	603	mode, master can only sends the 1st 7 bits of the 10 bit address, followed by
mbed_official	130:1dec54e4aec3	604	Read direction by enabling HEADR bit using I2C_10BitAddressHeader() function.
mbed_official	130:1dec54e4aec3	605
mbed_official	130:1dec54e4aec3	606	[..] In master mode, when transferring more than 255 bytes Reload mode should be used
mbed_official	130:1dec54e4aec3	607	to handle communication. In the first phase of transfer, Nbytes should be set to
mbed_official	130:1dec54e4aec3	608	255. After transferring these bytes TCR flag is set and I2C_TransferHandling()
mbed_official	130:1dec54e4aec3	609	function should be called to handle remaining communication.
mbed_official	130:1dec54e4aec3	610
mbed_official	130:1dec54e4aec3	611	[..] In master mode, when software end mode is selected when all data is transferred
mbed_official	130:1dec54e4aec3	612	TC flag is set I2C_TransferHandling() function should be called to generate STOP
mbed_official	130:1dec54e4aec3	613	or generate ReStart.
mbed_official	130:1dec54e4aec3	614
mbed_official	130:1dec54e4aec3	615	@endverbatim
mbed_official	130:1dec54e4aec3	616	* @{
mbed_official	130:1dec54e4aec3	617	*/
mbed_official	130:1dec54e4aec3	618
mbed_official	130:1dec54e4aec3	619	/**
mbed_official	130:1dec54e4aec3	620	* @brief Enables or disables the I2C automatic end mode (stop condition is
mbed_official	130:1dec54e4aec3	621	* automatically sent when nbytes data are transferred).
mbed_official	130:1dec54e4aec3	622	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	623	* @param NewState: new state of the I2C automatic end mode.
mbed_official	130:1dec54e4aec3	624	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	625	* @note This function has effect if Reload mode is disabled.
mbed_official	130:1dec54e4aec3	626	* @retval None
mbed_official	130:1dec54e4aec3	627	*/
mbed_official	130:1dec54e4aec3	628	void I2C_AutoEndCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	629	{
mbed_official	130:1dec54e4aec3	630	/* Check the parameters */
mbed_official	130:1dec54e4aec3	631	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	632	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	633
mbed_official	130:1dec54e4aec3	634	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	635	{
mbed_official	130:1dec54e4aec3	636	/* Enable Auto end mode */
mbed_official	130:1dec54e4aec3	637	I2Cx->CR2 \|= I2C_CR2_AUTOEND;
mbed_official	130:1dec54e4aec3	638	}
mbed_official	130:1dec54e4aec3	639	else
mbed_official	130:1dec54e4aec3	640	{
mbed_official	130:1dec54e4aec3	641	/* Disable Auto end mode */
mbed_official	130:1dec54e4aec3	642	I2Cx->CR2 &= (uint32_t)~((uint32_t)I2C_CR2_AUTOEND);
mbed_official	130:1dec54e4aec3	643	}
mbed_official	130:1dec54e4aec3	644	}
mbed_official	130:1dec54e4aec3	645
mbed_official	130:1dec54e4aec3	646	/**
mbed_official	130:1dec54e4aec3	647	* @brief Enables or disables the I2C nbytes reload mode.
mbed_official	130:1dec54e4aec3	648	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	649	* @param NewState: new state of the nbytes reload mode.
mbed_official	130:1dec54e4aec3	650	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	651	* @retval None
mbed_official	130:1dec54e4aec3	652	*/
mbed_official	130:1dec54e4aec3	653	void I2C_ReloadCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	654	{
mbed_official	130:1dec54e4aec3	655	/* Check the parameters */
mbed_official	130:1dec54e4aec3	656	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	657	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	658
mbed_official	130:1dec54e4aec3	659	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	660	{
mbed_official	130:1dec54e4aec3	661	/* Enable Auto Reload mode */
mbed_official	130:1dec54e4aec3	662	I2Cx->CR2 \|= I2C_CR2_RELOAD;
mbed_official	130:1dec54e4aec3	663	}
mbed_official	130:1dec54e4aec3	664	else
mbed_official	130:1dec54e4aec3	665	{
mbed_official	130:1dec54e4aec3	666	/* Disable Auto Reload mode */
mbed_official	130:1dec54e4aec3	667	I2Cx->CR2 &= (uint32_t)~((uint32_t)I2C_CR2_RELOAD);
mbed_official	130:1dec54e4aec3	668	}
mbed_official	130:1dec54e4aec3	669	}
mbed_official	130:1dec54e4aec3	670
mbed_official	130:1dec54e4aec3	671	/**
mbed_official	130:1dec54e4aec3	672	* @brief Configures the number of bytes to be transmitted/received.
mbed_official	130:1dec54e4aec3	673	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	674	* @param Number_Bytes: specifies the number of bytes to be programmed.
mbed_official	130:1dec54e4aec3	675	* @retval None
mbed_official	130:1dec54e4aec3	676	*/
mbed_official	130:1dec54e4aec3	677	void I2C_NumberOfBytesConfig(I2C_TypeDef* I2Cx, uint8_t Number_Bytes)
mbed_official	130:1dec54e4aec3	678	{
mbed_official	130:1dec54e4aec3	679	uint32_t tmpreg = 0;
mbed_official	130:1dec54e4aec3	680
mbed_official	130:1dec54e4aec3	681	/* Check the parameters */
mbed_official	130:1dec54e4aec3	682	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	683
mbed_official	130:1dec54e4aec3	684	/* Get the old register value */
mbed_official	130:1dec54e4aec3	685	tmpreg = I2Cx->CR2;
mbed_official	130:1dec54e4aec3	686
mbed_official	130:1dec54e4aec3	687	/* Reset I2Cx Nbytes bit [7:0] */
mbed_official	130:1dec54e4aec3	688	tmpreg &= (uint32_t)~((uint32_t)I2C_CR2_NBYTES);
mbed_official	130:1dec54e4aec3	689
mbed_official	130:1dec54e4aec3	690	/* Set I2Cx Nbytes */
mbed_official	130:1dec54e4aec3	691	tmpreg \|= (uint32_t)(((uint32_t)Number_Bytes << 16 ) & I2C_CR2_NBYTES);
mbed_official	130:1dec54e4aec3	692
mbed_official	130:1dec54e4aec3	693	/* Store the new register value */
mbed_official	130:1dec54e4aec3	694	I2Cx->CR2 = tmpreg;
mbed_official	130:1dec54e4aec3	695	}
mbed_official	130:1dec54e4aec3	696
mbed_official	130:1dec54e4aec3	697	/**
mbed_official	130:1dec54e4aec3	698	* @brief Configures the type of transfer request for the master.
mbed_official	130:1dec54e4aec3	699	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	700	* @param I2C_Direction: specifies the transfer request direction to be programmed.
mbed_official	130:1dec54e4aec3	701	* This parameter can be one of the following values:
mbed_official	130:1dec54e4aec3	702	* @arg I2C_Direction_Transmitter: Master request a write transfer
mbed_official	130:1dec54e4aec3	703	* @arg I2C_Direction_Receiver: Master request a read transfer
mbed_official	130:1dec54e4aec3	704	* @retval None
mbed_official	130:1dec54e4aec3	705	*/
mbed_official	130:1dec54e4aec3	706	void I2C_MasterRequestConfig(I2C_TypeDef* I2Cx, uint16_t I2C_Direction)
mbed_official	130:1dec54e4aec3	707	{
mbed_official	130:1dec54e4aec3	708	/* Check the parameters */
mbed_official	130:1dec54e4aec3	709	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	710	assert_param(IS_I2C_DIRECTION(I2C_Direction));
mbed_official	130:1dec54e4aec3	711
mbed_official	130:1dec54e4aec3	712	/* Test on the direction to set/reset the read/write bit */
mbed_official	130:1dec54e4aec3	713	if (I2C_Direction == I2C_Direction_Transmitter)
mbed_official	130:1dec54e4aec3	714	{
mbed_official	130:1dec54e4aec3	715	/* Request a write Transfer */
mbed_official	130:1dec54e4aec3	716	I2Cx->CR2 &= (uint32_t)~((uint32_t)I2C_CR2_RD_WRN);
mbed_official	130:1dec54e4aec3	717	}
mbed_official	130:1dec54e4aec3	718	else
mbed_official	130:1dec54e4aec3	719	{
mbed_official	130:1dec54e4aec3	720	/* Request a read Transfer */
mbed_official	130:1dec54e4aec3	721	I2Cx->CR2 \|= I2C_CR2_RD_WRN;
mbed_official	130:1dec54e4aec3	722	}
mbed_official	130:1dec54e4aec3	723	}
mbed_official	130:1dec54e4aec3	724
mbed_official	130:1dec54e4aec3	725	/**
mbed_official	130:1dec54e4aec3	726	* @brief Generates I2Cx communication START condition.
mbed_official	130:1dec54e4aec3	727	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	728	* @param NewState: new state of the I2C START condition generation.
mbed_official	130:1dec54e4aec3	729	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	730	* @retval None
mbed_official	130:1dec54e4aec3	731	*/
mbed_official	130:1dec54e4aec3	732	void I2C_GenerateSTART(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	733	{
mbed_official	130:1dec54e4aec3	734	/* Check the parameters */
mbed_official	130:1dec54e4aec3	735	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	736	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	737
mbed_official	130:1dec54e4aec3	738	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	739	{
mbed_official	130:1dec54e4aec3	740	/* Generate a START condition */
mbed_official	130:1dec54e4aec3	741	I2Cx->CR2 \|= I2C_CR2_START;
mbed_official	130:1dec54e4aec3	742	}
mbed_official	130:1dec54e4aec3	743	else
mbed_official	130:1dec54e4aec3	744	{
mbed_official	130:1dec54e4aec3	745	/* Disable the START condition generation */
mbed_official	130:1dec54e4aec3	746	I2Cx->CR2 &= (uint32_t)~((uint32_t)I2C_CR2_START);
mbed_official	130:1dec54e4aec3	747	}
mbed_official	130:1dec54e4aec3	748	}
mbed_official	130:1dec54e4aec3	749
mbed_official	130:1dec54e4aec3	750	/**
mbed_official	130:1dec54e4aec3	751	* @brief Generates I2Cx communication STOP condition.
mbed_official	130:1dec54e4aec3	752	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	753	* @param NewState: new state of the I2C STOP condition generation.
mbed_official	130:1dec54e4aec3	754	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	755	* @retval None
mbed_official	130:1dec54e4aec3	756	*/
mbed_official	130:1dec54e4aec3	757	void I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	758	{
mbed_official	130:1dec54e4aec3	759	/* Check the parameters */
mbed_official	130:1dec54e4aec3	760	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	761	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	762
mbed_official	130:1dec54e4aec3	763	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	764	{
mbed_official	130:1dec54e4aec3	765	/* Generate a STOP condition */
mbed_official	130:1dec54e4aec3	766	I2Cx->CR2 \|= I2C_CR2_STOP;
mbed_official	130:1dec54e4aec3	767	}
mbed_official	130:1dec54e4aec3	768	else
mbed_official	130:1dec54e4aec3	769	{
mbed_official	130:1dec54e4aec3	770	/* Disable the STOP condition generation */
mbed_official	130:1dec54e4aec3	771	I2Cx->CR2 &= (uint32_t)~((uint32_t)I2C_CR2_STOP);
mbed_official	130:1dec54e4aec3	772	}
mbed_official	130:1dec54e4aec3	773	}
mbed_official	130:1dec54e4aec3	774
mbed_official	130:1dec54e4aec3	775	/**
mbed_official	130:1dec54e4aec3	776	* @brief Enables or disables the I2C 10-bit header only mode with read direction.
mbed_official	130:1dec54e4aec3	777	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	778	* @param NewState: new state of the I2C 10-bit header only mode.
mbed_official	130:1dec54e4aec3	779	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	780	* @note This mode can be used only when switching from master transmitter mode
mbed_official	130:1dec54e4aec3	781	* to master receiver mode.
mbed_official	130:1dec54e4aec3	782	* @retval None
mbed_official	130:1dec54e4aec3	783	*/
mbed_official	130:1dec54e4aec3	784	void I2C_10BitAddressHeaderCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	785	{
mbed_official	130:1dec54e4aec3	786	/* Check the parameters */
mbed_official	130:1dec54e4aec3	787	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	788	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	789
mbed_official	130:1dec54e4aec3	790	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	791	{
mbed_official	130:1dec54e4aec3	792	/* Enable 10-bit header only mode */
mbed_official	130:1dec54e4aec3	793	I2Cx->CR2 \|= I2C_CR2_HEAD10R;
mbed_official	130:1dec54e4aec3	794	}
mbed_official	130:1dec54e4aec3	795	else
mbed_official	130:1dec54e4aec3	796	{
mbed_official	130:1dec54e4aec3	797	/* Disable 10-bit header only mode */
mbed_official	130:1dec54e4aec3	798	I2Cx->CR2 &= (uint32_t)~((uint32_t)I2C_CR2_HEAD10R);
mbed_official	130:1dec54e4aec3	799	}
mbed_official	130:1dec54e4aec3	800	}
mbed_official	130:1dec54e4aec3	801
mbed_official	130:1dec54e4aec3	802	/**
mbed_official	130:1dec54e4aec3	803	* @brief Generates I2C communication Acknowledge.
mbed_official	130:1dec54e4aec3	804	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	805	* @param NewState: new state of the Acknowledge.
mbed_official	130:1dec54e4aec3	806	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	807	* @retval None
mbed_official	130:1dec54e4aec3	808	*/
mbed_official	130:1dec54e4aec3	809	void I2C_AcknowledgeConfig(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	810	{
mbed_official	130:1dec54e4aec3	811	/* Check the parameters */
mbed_official	130:1dec54e4aec3	812	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	813	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	814
mbed_official	130:1dec54e4aec3	815	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	816	{
mbed_official	130:1dec54e4aec3	817	/* Enable ACK generation */
mbed_official	130:1dec54e4aec3	818	I2Cx->CR2 &= (uint32_t)~((uint32_t)I2C_CR2_NACK);
mbed_official	130:1dec54e4aec3	819	}
mbed_official	130:1dec54e4aec3	820	else
mbed_official	130:1dec54e4aec3	821	{
mbed_official	130:1dec54e4aec3	822	/* Enable NACK generation */
mbed_official	130:1dec54e4aec3	823	I2Cx->CR2 \|= I2C_CR2_NACK;
mbed_official	130:1dec54e4aec3	824	}
mbed_official	130:1dec54e4aec3	825	}
mbed_official	130:1dec54e4aec3	826
mbed_official	130:1dec54e4aec3	827	/**
mbed_official	130:1dec54e4aec3	828	* @brief Returns the I2C slave matched address .
mbed_official	130:1dec54e4aec3	829	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	830	* @retval The value of the slave matched address .
mbed_official	130:1dec54e4aec3	831	*/
mbed_official	130:1dec54e4aec3	832	uint8_t I2C_GetAddressMatched(I2C_TypeDef* I2Cx)
mbed_official	130:1dec54e4aec3	833	{
mbed_official	130:1dec54e4aec3	834	/* Check the parameters */
mbed_official	130:1dec54e4aec3	835	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	836
mbed_official	130:1dec54e4aec3	837	/* Return the slave matched address in the SR1 register */
mbed_official	130:1dec54e4aec3	838	return (uint8_t)(((uint32_t)I2Cx->ISR & I2C_ISR_ADDCODE) >> 16) ;
mbed_official	130:1dec54e4aec3	839	}
mbed_official	130:1dec54e4aec3	840
mbed_official	130:1dec54e4aec3	841	/**
mbed_official	130:1dec54e4aec3	842	* @brief Returns the I2C slave received request.
mbed_official	130:1dec54e4aec3	843	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	844	* @retval The value of the received request.
mbed_official	130:1dec54e4aec3	845	*/
mbed_official	130:1dec54e4aec3	846	uint16_t I2C_GetTransferDirection(I2C_TypeDef* I2Cx)
mbed_official	130:1dec54e4aec3	847	{
mbed_official	130:1dec54e4aec3	848	uint32_t tmpreg = 0;
mbed_official	130:1dec54e4aec3	849	uint16_t direction = 0;
mbed_official	130:1dec54e4aec3	850
mbed_official	130:1dec54e4aec3	851	/* Check the parameters */
mbed_official	130:1dec54e4aec3	852	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	853
mbed_official	130:1dec54e4aec3	854	/* Return the slave matched address in the SR1 register */
mbed_official	130:1dec54e4aec3	855	tmpreg = (uint32_t)(I2Cx->ISR & I2C_ISR_DIR);
mbed_official	130:1dec54e4aec3	856
mbed_official	130:1dec54e4aec3	857	/* If write transfer is requested */
mbed_official	130:1dec54e4aec3	858	if (tmpreg == 0)
mbed_official	130:1dec54e4aec3	859	{
mbed_official	130:1dec54e4aec3	860	/* write transfer is requested */
mbed_official	130:1dec54e4aec3	861	direction = I2C_Direction_Transmitter;
mbed_official	130:1dec54e4aec3	862	}
mbed_official	130:1dec54e4aec3	863	else
mbed_official	130:1dec54e4aec3	864	{
mbed_official	130:1dec54e4aec3	865	/* Read transfer is requested */
mbed_official	130:1dec54e4aec3	866	direction = I2C_Direction_Receiver;
mbed_official	130:1dec54e4aec3	867	}
mbed_official	130:1dec54e4aec3	868	return direction;
mbed_official	130:1dec54e4aec3	869	}
mbed_official	130:1dec54e4aec3	870
mbed_official	130:1dec54e4aec3	871	/**
mbed_official	130:1dec54e4aec3	872	* @brief Handles I2Cx communication when starting transfer or during transfer (TC or TCR flag are set).
mbed_official	130:1dec54e4aec3	873	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	874	* @param Address: specifies the slave address to be programmed.
mbed_official	130:1dec54e4aec3	875	* @param Number_Bytes: specifies the number of bytes to be programmed.
mbed_official	130:1dec54e4aec3	876	* This parameter must be a value between 0 and 255.
mbed_official	130:1dec54e4aec3	877	* @param ReloadEndMode: new state of the I2C START condition generation.
mbed_official	130:1dec54e4aec3	878	* This parameter can be one of the following values:
mbed_official	130:1dec54e4aec3	879	* @arg I2C_Reload_Mode: Enable Reload mode .
mbed_official	130:1dec54e4aec3	880	* @arg I2C_AutoEnd_Mode: Enable Automatic end mode.
mbed_official	130:1dec54e4aec3	881	* @arg I2C_SoftEnd_Mode: Enable Software end mode.
mbed_official	130:1dec54e4aec3	882	* @param StartStopMode: new state of the I2C START condition generation.
mbed_official	130:1dec54e4aec3	883	* This parameter can be one of the following values:
mbed_official	130:1dec54e4aec3	884	* @arg I2C_No_StartStop: Don't Generate stop and start condition.
mbed_official	130:1dec54e4aec3	885	* @arg I2C_Generate_Stop: Generate stop condition (Number_Bytes should be set to 0).
mbed_official	130:1dec54e4aec3	886	* @arg I2C_Generate_Start_Read: Generate Restart for read request.
mbed_official	130:1dec54e4aec3	887	* @arg I2C_Generate_Start_Write: Generate Restart for write request.
mbed_official	130:1dec54e4aec3	888	* @retval None
mbed_official	130:1dec54e4aec3	889	*/
mbed_official	130:1dec54e4aec3	890	void I2C_TransferHandling(I2C_TypeDef* I2Cx, uint16_t Address, uint8_t Number_Bytes, uint32_t ReloadEndMode, uint32_t StartStopMode)
mbed_official	130:1dec54e4aec3	891	{
mbed_official	130:1dec54e4aec3	892	uint32_t tmpreg = 0;
mbed_official	130:1dec54e4aec3	893
mbed_official	130:1dec54e4aec3	894	/* Check the parameters */
mbed_official	130:1dec54e4aec3	895	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	896	assert_param(IS_I2C_SLAVE_ADDRESS(Address));
mbed_official	130:1dec54e4aec3	897	assert_param(IS_RELOAD_END_MODE(ReloadEndMode));
mbed_official	130:1dec54e4aec3	898	assert_param(IS_START_STOP_MODE(StartStopMode));
mbed_official	130:1dec54e4aec3	899
mbed_official	130:1dec54e4aec3	900	/* Get the CR2 register value */
mbed_official	130:1dec54e4aec3	901	tmpreg = I2Cx->CR2;
mbed_official	130:1dec54e4aec3	902
mbed_official	130:1dec54e4aec3	903	/* clear tmpreg specific bits */
mbed_official	130:1dec54e4aec3	904	tmpreg &= (uint32_t)~((uint32_t)(I2C_CR2_SADD \| I2C_CR2_NBYTES \| I2C_CR2_RELOAD \| I2C_CR2_AUTOEND \| I2C_CR2_RD_WRN \| I2C_CR2_START \| I2C_CR2_STOP));
mbed_official	130:1dec54e4aec3	905
mbed_official	130:1dec54e4aec3	906	/* update tmpreg */
mbed_official	130:1dec54e4aec3	907	tmpreg \|= (uint32_t)(((uint32_t)Address & I2C_CR2_SADD) \| (((uint32_t)Number_Bytes << 16 ) & I2C_CR2_NBYTES) \| \
mbed_official	130:1dec54e4aec3	908	(uint32_t)ReloadEndMode \| (uint32_t)StartStopMode);
mbed_official	130:1dec54e4aec3	909
mbed_official	130:1dec54e4aec3	910	/* update CR2 register */
mbed_official	130:1dec54e4aec3	911	I2Cx->CR2 = tmpreg;
mbed_official	130:1dec54e4aec3	912	}
mbed_official	130:1dec54e4aec3	913
mbed_official	130:1dec54e4aec3	914	/**
mbed_official	130:1dec54e4aec3	915	* @}
mbed_official	130:1dec54e4aec3	916	*/
mbed_official	130:1dec54e4aec3	917
mbed_official	130:1dec54e4aec3	918
mbed_official	130:1dec54e4aec3	919	/** @defgroup I2C_Group3 SMBUS management functions
mbed_official	130:1dec54e4aec3	920	* @brief SMBUS management functions
mbed_official	130:1dec54e4aec3	921	*
mbed_official	130:1dec54e4aec3	922	@verbatim
mbed_official	130:1dec54e4aec3	923	===============================================================================
mbed_official	130:1dec54e4aec3	924	##### SMBUS management functions #####
mbed_official	130:1dec54e4aec3	925	===============================================================================
mbed_official	130:1dec54e4aec3	926	[..] This section provides a set of functions that handles SMBus communication
mbed_official	130:1dec54e4aec3	927	and timeouts detection.
mbed_official	130:1dec54e4aec3	928
mbed_official	130:1dec54e4aec3	929	[..] The SMBus Device default address (0b1100 001) is enabled by calling I2C_Init()
mbed_official	130:1dec54e4aec3	930	function and setting I2C_Mode member of I2C_InitTypeDef() structure to
mbed_official	130:1dec54e4aec3	931	I2C_Mode_SMBusDevice.
mbed_official	130:1dec54e4aec3	932
mbed_official	130:1dec54e4aec3	933	[..] The SMBus Host address (0b0001 000) is enabled by calling I2C_Init()
mbed_official	130:1dec54e4aec3	934	function and setting I2C_Mode member of I2C_InitTypeDef() structure to
mbed_official	130:1dec54e4aec3	935	I2C_Mode_SMBusHost.
mbed_official	130:1dec54e4aec3	936
mbed_official	130:1dec54e4aec3	937	[..] The Alert Response Address (0b0001 100) is enabled using I2C_SMBusAlertCmd()
mbed_official	130:1dec54e4aec3	938	function.
mbed_official	130:1dec54e4aec3	939
mbed_official	130:1dec54e4aec3	940	[..] To detect cumulative SCL stretch in master and slave mode, TIMEOUTB should be
mbed_official	130:1dec54e4aec3	941	configured (in accordance to SMBus specification) using I2C_TimeoutBConfig()
mbed_official	130:1dec54e4aec3	942	function then I2C_ExtendedClockTimeoutCmd() function should be called to enable
mbed_official	130:1dec54e4aec3	943	the detection.
mbed_official	130:1dec54e4aec3	944
mbed_official	130:1dec54e4aec3	945	[..] SCL low timeout is detected by configuring TIMEOUTB using I2C_TimeoutBConfig()
mbed_official	130:1dec54e4aec3	946	function followed by the call of I2C_ClockTimeoutCmd(). When adding to this
mbed_official	130:1dec54e4aec3	947	procedure the call of I2C_IdleClockTimeoutCmd() function, Bus Idle condition
mbed_official	130:1dec54e4aec3	948	(both SCL and SDA high) is detected also.
mbed_official	130:1dec54e4aec3	949
mbed_official	130:1dec54e4aec3	950	@endverbatim
mbed_official	130:1dec54e4aec3	951	* @{
mbed_official	130:1dec54e4aec3	952	*/
mbed_official	130:1dec54e4aec3	953
mbed_official	130:1dec54e4aec3	954	/**
mbed_official	130:1dec54e4aec3	955	* @brief Enables or disables I2C SMBus alert.
mbed_official	130:1dec54e4aec3	956	* @param I2Cx: where x can be 1 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	957	* @param NewState: new state of the I2Cx SMBus alert.
mbed_official	130:1dec54e4aec3	958	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	959	* @retval None
mbed_official	130:1dec54e4aec3	960	*/
mbed_official	130:1dec54e4aec3	961	void I2C_SMBusAlertCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	962	{
mbed_official	130:1dec54e4aec3	963	/* Check the parameters */
mbed_official	130:1dec54e4aec3	964	assert_param(IS_I2C_1_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	965	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	966
mbed_official	130:1dec54e4aec3	967	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	968	{
mbed_official	130:1dec54e4aec3	969	/* Enable SMBus alert */
mbed_official	130:1dec54e4aec3	970	I2Cx->CR1 \|= I2C_CR1_ALERTEN;
mbed_official	130:1dec54e4aec3	971	}
mbed_official	130:1dec54e4aec3	972	else
mbed_official	130:1dec54e4aec3	973	{
mbed_official	130:1dec54e4aec3	974	/* Disable SMBus alert */
mbed_official	130:1dec54e4aec3	975	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_CR1_ALERTEN);
mbed_official	130:1dec54e4aec3	976	}
mbed_official	130:1dec54e4aec3	977	}
mbed_official	130:1dec54e4aec3	978
mbed_official	130:1dec54e4aec3	979	/**
mbed_official	130:1dec54e4aec3	980	* @brief Enables or disables I2C Clock Timeout (SCL Timeout detection).
mbed_official	130:1dec54e4aec3	981	* @param I2Cx: where x can be 1 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	982	* @param NewState: new state of the I2Cx clock Timeout.
mbed_official	130:1dec54e4aec3	983	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	984	* @retval None
mbed_official	130:1dec54e4aec3	985	*/
mbed_official	130:1dec54e4aec3	986	void I2C_ClockTimeoutCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	987	{
mbed_official	130:1dec54e4aec3	988	/* Check the parameters */
mbed_official	130:1dec54e4aec3	989	assert_param(IS_I2C_1_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	990	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	991
mbed_official	130:1dec54e4aec3	992	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	993	{
mbed_official	130:1dec54e4aec3	994	/* Enable Clock Timeout */
mbed_official	130:1dec54e4aec3	995	I2Cx->TIMEOUTR \|= I2C_TIMEOUTR_TIMOUTEN;
mbed_official	130:1dec54e4aec3	996	}
mbed_official	130:1dec54e4aec3	997	else
mbed_official	130:1dec54e4aec3	998	{
mbed_official	130:1dec54e4aec3	999	/* Disable Clock Timeout */
mbed_official	130:1dec54e4aec3	1000	I2Cx->TIMEOUTR &= (uint32_t)~((uint32_t)I2C_TIMEOUTR_TIMOUTEN);
mbed_official	130:1dec54e4aec3	1001	}
mbed_official	130:1dec54e4aec3	1002	}
mbed_official	130:1dec54e4aec3	1003
mbed_official	130:1dec54e4aec3	1004	/**
mbed_official	130:1dec54e4aec3	1005	* @brief Enables or disables I2C Extended Clock Timeout (SCL cumulative Timeout detection).
mbed_official	130:1dec54e4aec3	1006	* @param I2Cx: where x can be 1 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1007	* @param NewState: new state of the I2Cx Extended clock Timeout.
mbed_official	130:1dec54e4aec3	1008	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	1009	* @retval None
mbed_official	130:1dec54e4aec3	1010	*/
mbed_official	130:1dec54e4aec3	1011	void I2C_ExtendedClockTimeoutCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	1012	{
mbed_official	130:1dec54e4aec3	1013	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1014	assert_param(IS_I2C_1_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1015	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	1016
mbed_official	130:1dec54e4aec3	1017	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	1018	{
mbed_official	130:1dec54e4aec3	1019	/* Enable Clock Timeout */
mbed_official	130:1dec54e4aec3	1020	I2Cx->TIMEOUTR \|= I2C_TIMEOUTR_TEXTEN;
mbed_official	130:1dec54e4aec3	1021	}
mbed_official	130:1dec54e4aec3	1022	else
mbed_official	130:1dec54e4aec3	1023	{
mbed_official	130:1dec54e4aec3	1024	/* Disable Clock Timeout */
mbed_official	130:1dec54e4aec3	1025	I2Cx->TIMEOUTR &= (uint32_t)~((uint32_t)I2C_TIMEOUTR_TEXTEN);
mbed_official	130:1dec54e4aec3	1026	}
mbed_official	130:1dec54e4aec3	1027	}
mbed_official	130:1dec54e4aec3	1028
mbed_official	130:1dec54e4aec3	1029	/**
mbed_official	130:1dec54e4aec3	1030	* @brief Enables or disables I2C Idle Clock Timeout (Bus idle SCL and SDA
mbed_official	130:1dec54e4aec3	1031	* high detection).
mbed_official	130:1dec54e4aec3	1032	* @param I2Cx: where x can be 1 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1033	* @param NewState: new state of the I2Cx Idle clock Timeout.
mbed_official	130:1dec54e4aec3	1034	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	1035	* @retval None
mbed_official	130:1dec54e4aec3	1036	*/
mbed_official	130:1dec54e4aec3	1037	void I2C_IdleClockTimeoutCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	1038	{
mbed_official	130:1dec54e4aec3	1039	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1040	assert_param(IS_I2C_1_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1041	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	1042
mbed_official	130:1dec54e4aec3	1043	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	1044	{
mbed_official	130:1dec54e4aec3	1045	/* Enable Clock Timeout */
mbed_official	130:1dec54e4aec3	1046	I2Cx->TIMEOUTR \|= I2C_TIMEOUTR_TIDLE;
mbed_official	130:1dec54e4aec3	1047	}
mbed_official	130:1dec54e4aec3	1048	else
mbed_official	130:1dec54e4aec3	1049	{
mbed_official	130:1dec54e4aec3	1050	/* Disable Clock Timeout */
mbed_official	130:1dec54e4aec3	1051	I2Cx->TIMEOUTR &= (uint32_t)~((uint32_t)I2C_TIMEOUTR_TIDLE);
mbed_official	130:1dec54e4aec3	1052	}
mbed_official	130:1dec54e4aec3	1053	}
mbed_official	130:1dec54e4aec3	1054
mbed_official	130:1dec54e4aec3	1055	/**
mbed_official	130:1dec54e4aec3	1056	* @brief Configures the I2C Bus Timeout A (SCL Timeout when TIDLE = 0 or Bus
mbed_official	130:1dec54e4aec3	1057	* idle SCL and SDA high when TIDLE = 1).
mbed_official	130:1dec54e4aec3	1058	* @param I2Cx: where x can be 1 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1059	* @param Timeout: specifies the TimeoutA to be programmed.
mbed_official	130:1dec54e4aec3	1060	* @retval None
mbed_official	130:1dec54e4aec3	1061	*/
mbed_official	130:1dec54e4aec3	1062	void I2C_TimeoutAConfig(I2C_TypeDef* I2Cx, uint16_t Timeout)
mbed_official	130:1dec54e4aec3	1063	{
mbed_official	130:1dec54e4aec3	1064	uint32_t tmpreg = 0;
mbed_official	130:1dec54e4aec3	1065
mbed_official	130:1dec54e4aec3	1066	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1067	assert_param(IS_I2C_1_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1068	assert_param(IS_I2C_TIMEOUT(Timeout));
mbed_official	130:1dec54e4aec3	1069
mbed_official	130:1dec54e4aec3	1070	/* Get the old register value */
mbed_official	130:1dec54e4aec3	1071	tmpreg = I2Cx->TIMEOUTR;
mbed_official	130:1dec54e4aec3	1072
mbed_official	130:1dec54e4aec3	1073	/* Reset I2Cx TIMEOUTA bit [11:0] */
mbed_official	130:1dec54e4aec3	1074	tmpreg &= (uint32_t)~((uint32_t)I2C_TIMEOUTR_TIMEOUTA);
mbed_official	130:1dec54e4aec3	1075
mbed_official	130:1dec54e4aec3	1076	/* Set I2Cx TIMEOUTA */
mbed_official	130:1dec54e4aec3	1077	tmpreg \|= (uint32_t)((uint32_t)Timeout & I2C_TIMEOUTR_TIMEOUTA) ;
mbed_official	130:1dec54e4aec3	1078
mbed_official	130:1dec54e4aec3	1079	/* Store the new register value */
mbed_official	130:1dec54e4aec3	1080	I2Cx->TIMEOUTR = tmpreg;
mbed_official	130:1dec54e4aec3	1081	}
mbed_official	130:1dec54e4aec3	1082
mbed_official	130:1dec54e4aec3	1083	/**
mbed_official	130:1dec54e4aec3	1084	* @brief Configures the I2C Bus Timeout B (SCL cumulative Timeout).
mbed_official	130:1dec54e4aec3	1085	* @param I2Cx: where x can be 1 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1086	* @param Timeout: specifies the TimeoutB to be programmed.
mbed_official	130:1dec54e4aec3	1087	* @retval None
mbed_official	130:1dec54e4aec3	1088	*/
mbed_official	130:1dec54e4aec3	1089	void I2C_TimeoutBConfig(I2C_TypeDef* I2Cx, uint16_t Timeout)
mbed_official	130:1dec54e4aec3	1090	{
mbed_official	130:1dec54e4aec3	1091	uint32_t tmpreg = 0;
mbed_official	130:1dec54e4aec3	1092
mbed_official	130:1dec54e4aec3	1093	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1094	assert_param(IS_I2C_1_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1095	assert_param(IS_I2C_TIMEOUT(Timeout));
mbed_official	130:1dec54e4aec3	1096
mbed_official	130:1dec54e4aec3	1097	/* Get the old register value */
mbed_official	130:1dec54e4aec3	1098	tmpreg = I2Cx->TIMEOUTR;
mbed_official	130:1dec54e4aec3	1099
mbed_official	130:1dec54e4aec3	1100	/* Reset I2Cx TIMEOUTB bit [11:0] */
mbed_official	130:1dec54e4aec3	1101	tmpreg &= (uint32_t)~((uint32_t)I2C_TIMEOUTR_TIMEOUTB);
mbed_official	130:1dec54e4aec3	1102
mbed_official	130:1dec54e4aec3	1103	/* Set I2Cx TIMEOUTB */
mbed_official	130:1dec54e4aec3	1104	tmpreg \|= (uint32_t)(((uint32_t)Timeout << 16) & I2C_TIMEOUTR_TIMEOUTB) ;
mbed_official	130:1dec54e4aec3	1105
mbed_official	130:1dec54e4aec3	1106	/* Store the new register value */
mbed_official	130:1dec54e4aec3	1107	I2Cx->TIMEOUTR = tmpreg;
mbed_official	130:1dec54e4aec3	1108	}
mbed_official	130:1dec54e4aec3	1109
mbed_official	130:1dec54e4aec3	1110	/**
mbed_official	130:1dec54e4aec3	1111	* @brief Enables or disables I2C PEC calculation.
mbed_official	130:1dec54e4aec3	1112	* @param I2Cx: where x can be 1 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1113	* @param NewState: new state of the I2Cx PEC calculation.
mbed_official	130:1dec54e4aec3	1114	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	1115	* @retval None
mbed_official	130:1dec54e4aec3	1116	*/
mbed_official	130:1dec54e4aec3	1117	void I2C_CalculatePEC(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	1118	{
mbed_official	130:1dec54e4aec3	1119	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1120	assert_param(IS_I2C_1_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1121	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	1122
mbed_official	130:1dec54e4aec3	1123	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	1124	{
mbed_official	130:1dec54e4aec3	1125	/* Enable PEC calculation */
mbed_official	130:1dec54e4aec3	1126	I2Cx->CR1 \|= I2C_CR1_PECEN;
mbed_official	130:1dec54e4aec3	1127	}
mbed_official	130:1dec54e4aec3	1128	else
mbed_official	130:1dec54e4aec3	1129	{
mbed_official	130:1dec54e4aec3	1130	/* Disable PEC calculation */
mbed_official	130:1dec54e4aec3	1131	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_CR1_PECEN);
mbed_official	130:1dec54e4aec3	1132	}
mbed_official	130:1dec54e4aec3	1133	}
mbed_official	130:1dec54e4aec3	1134
mbed_official	130:1dec54e4aec3	1135	/**
mbed_official	130:1dec54e4aec3	1136	* @brief Enables or disables I2C PEC transmission/reception request.
mbed_official	130:1dec54e4aec3	1137	* @param I2Cx: where x can be 1 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1138	* @param NewState: new state of the I2Cx PEC request.
mbed_official	130:1dec54e4aec3	1139	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	1140	* @retval None
mbed_official	130:1dec54e4aec3	1141	*/
mbed_official	130:1dec54e4aec3	1142	void I2C_PECRequestCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	1143	{
mbed_official	130:1dec54e4aec3	1144	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1145	assert_param(IS_I2C_1_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1146	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	1147
mbed_official	130:1dec54e4aec3	1148	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	1149	{
mbed_official	130:1dec54e4aec3	1150	/* Enable PEC transmission/reception request */
mbed_official	130:1dec54e4aec3	1151	I2Cx->CR1 \|= I2C_CR2_PECBYTE;
mbed_official	130:1dec54e4aec3	1152	}
mbed_official	130:1dec54e4aec3	1153	else
mbed_official	130:1dec54e4aec3	1154	{
mbed_official	130:1dec54e4aec3	1155	/* Disable PEC transmission/reception request */
mbed_official	130:1dec54e4aec3	1156	I2Cx->CR1 &= (uint32_t)~((uint32_t)I2C_CR2_PECBYTE);
mbed_official	130:1dec54e4aec3	1157	}
mbed_official	130:1dec54e4aec3	1158	}
mbed_official	130:1dec54e4aec3	1159
mbed_official	130:1dec54e4aec3	1160	/**
mbed_official	130:1dec54e4aec3	1161	* @brief Returns the I2C PEC.
mbed_official	130:1dec54e4aec3	1162	* @param I2Cx: where x can be 1 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1163	* @retval The value of the PEC .
mbed_official	130:1dec54e4aec3	1164	*/
mbed_official	130:1dec54e4aec3	1165	uint8_t I2C_GetPEC(I2C_TypeDef* I2Cx)
mbed_official	130:1dec54e4aec3	1166	{
mbed_official	130:1dec54e4aec3	1167	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1168	assert_param(IS_I2C_1_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1169
mbed_official	130:1dec54e4aec3	1170	/* Return the slave matched address in the SR1 register */
mbed_official	130:1dec54e4aec3	1171	return (uint8_t)((uint32_t)I2Cx->PECR & I2C_PECR_PEC);
mbed_official	130:1dec54e4aec3	1172	}
mbed_official	130:1dec54e4aec3	1173
mbed_official	130:1dec54e4aec3	1174	/**
mbed_official	130:1dec54e4aec3	1175	* @}
mbed_official	130:1dec54e4aec3	1176	*/
mbed_official	130:1dec54e4aec3	1177
mbed_official	130:1dec54e4aec3	1178
mbed_official	130:1dec54e4aec3	1179	/** @defgroup I2C_Group4 I2C registers management functions
mbed_official	130:1dec54e4aec3	1180	* @brief I2C registers management functions
mbed_official	130:1dec54e4aec3	1181	*
mbed_official	130:1dec54e4aec3	1182	@verbatim
mbed_official	130:1dec54e4aec3	1183	===============================================================================
mbed_official	130:1dec54e4aec3	1184	##### I2C registers management functions #####
mbed_official	130:1dec54e4aec3	1185	===============================================================================
mbed_official	130:1dec54e4aec3	1186	[..] This section provides a functions that allow user the management of
mbed_official	130:1dec54e4aec3	1187	I2C registers.
mbed_official	130:1dec54e4aec3	1188
mbed_official	130:1dec54e4aec3	1189	@endverbatim
mbed_official	130:1dec54e4aec3	1190	* @{
mbed_official	130:1dec54e4aec3	1191	*/
mbed_official	130:1dec54e4aec3	1192
mbed_official	130:1dec54e4aec3	1193	/**
mbed_official	130:1dec54e4aec3	1194	* @brief Reads the specified I2C register and returns its value.
mbed_official	130:1dec54e4aec3	1195	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1196	* @param I2C_Register: specifies the register to read.
mbed_official	130:1dec54e4aec3	1197	* This parameter can be one of the following values:
mbed_official	130:1dec54e4aec3	1198	* @arg I2C_Register_CR1: CR1 register.
mbed_official	130:1dec54e4aec3	1199	* @arg I2C_Register_CR2: CR2 register.
mbed_official	130:1dec54e4aec3	1200	* @arg I2C_Register_OAR1: OAR1 register.
mbed_official	130:1dec54e4aec3	1201	* @arg I2C_Register_OAR2: OAR2 register.
mbed_official	130:1dec54e4aec3	1202	* @arg I2C_Register_TIMINGR: TIMING register.
mbed_official	130:1dec54e4aec3	1203	* @arg I2C_Register_TIMEOUTR: TIMEOUTR register.
mbed_official	130:1dec54e4aec3	1204	* @arg I2C_Register_ISR: ISR register.
mbed_official	130:1dec54e4aec3	1205	* @arg I2C_Register_ICR: ICR register.
mbed_official	130:1dec54e4aec3	1206	* @arg I2C_Register_PECR: PECR register.
mbed_official	130:1dec54e4aec3	1207	* @arg I2C_Register_RXDR: RXDR register.
mbed_official	130:1dec54e4aec3	1208	* @arg I2C_Register_TXDR: TXDR register.
mbed_official	130:1dec54e4aec3	1209	* @retval The value of the read register.
mbed_official	130:1dec54e4aec3	1210	*/
mbed_official	130:1dec54e4aec3	1211	uint32_t I2C_ReadRegister(I2C_TypeDef* I2Cx, uint8_t I2C_Register)
mbed_official	130:1dec54e4aec3	1212	{
mbed_official	130:1dec54e4aec3	1213	__IO uint32_t tmp = 0;
mbed_official	130:1dec54e4aec3	1214
mbed_official	130:1dec54e4aec3	1215	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1216	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1217	assert_param(IS_I2C_REGISTER(I2C_Register));
mbed_official	130:1dec54e4aec3	1218
mbed_official	130:1dec54e4aec3	1219	tmp = (uint32_t)I2Cx;
mbed_official	130:1dec54e4aec3	1220	tmp += I2C_Register;
mbed_official	130:1dec54e4aec3	1221
mbed_official	130:1dec54e4aec3	1222	/* Return the selected register value */
mbed_official	130:1dec54e4aec3	1223	return ((__IO uint32_t ) tmp);
mbed_official	130:1dec54e4aec3	1224	}
mbed_official	130:1dec54e4aec3	1225
mbed_official	130:1dec54e4aec3	1226	/**
mbed_official	130:1dec54e4aec3	1227	* @}
mbed_official	130:1dec54e4aec3	1228	*/
mbed_official	130:1dec54e4aec3	1229
mbed_official	130:1dec54e4aec3	1230	/** @defgroup I2C_Group5 Data transfers management functions
mbed_official	130:1dec54e4aec3	1231	* @brief Data transfers management functions
mbed_official	130:1dec54e4aec3	1232	*
mbed_official	130:1dec54e4aec3	1233	@verbatim
mbed_official	130:1dec54e4aec3	1234	===============================================================================
mbed_official	130:1dec54e4aec3	1235	##### Data transfers management functions #####
mbed_official	130:1dec54e4aec3	1236	===============================================================================
mbed_official	130:1dec54e4aec3	1237	[..] This subsection provides a set of functions allowing to manage
mbed_official	130:1dec54e4aec3	1238	the I2C data transfers.
mbed_official	130:1dec54e4aec3	1239
mbed_official	130:1dec54e4aec3	1240	[..] The read access of the I2C_RXDR register can be done using
mbed_official	130:1dec54e4aec3	1241	the I2C_ReceiveData() function and returns the received value.
mbed_official	130:1dec54e4aec3	1242	Whereas a write access to the I2C_TXDR can be done using I2C_SendData()
mbed_official	130:1dec54e4aec3	1243	function and stores the written data into TXDR.
mbed_official	130:1dec54e4aec3	1244	@endverbatim
mbed_official	130:1dec54e4aec3	1245	* @{
mbed_official	130:1dec54e4aec3	1246	*/
mbed_official	130:1dec54e4aec3	1247
mbed_official	130:1dec54e4aec3	1248	/**
mbed_official	130:1dec54e4aec3	1249	* @brief Sends a data byte through the I2Cx peripheral.
mbed_official	130:1dec54e4aec3	1250	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1251	* @param Data: Byte to be transmitted..
mbed_official	130:1dec54e4aec3	1252	* @retval None
mbed_official	130:1dec54e4aec3	1253	*/
mbed_official	130:1dec54e4aec3	1254	void I2C_SendData(I2C_TypeDef* I2Cx, uint8_t Data)
mbed_official	130:1dec54e4aec3	1255	{
mbed_official	130:1dec54e4aec3	1256	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1257	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1258
mbed_official	130:1dec54e4aec3	1259	/* Write in the DR register the data to be sent */
mbed_official	130:1dec54e4aec3	1260	I2Cx->TXDR = (uint8_t)Data;
mbed_official	130:1dec54e4aec3	1261	}
mbed_official	130:1dec54e4aec3	1262
mbed_official	130:1dec54e4aec3	1263	/**
mbed_official	130:1dec54e4aec3	1264	* @brief Returns the most recent received data by the I2Cx peripheral.
mbed_official	130:1dec54e4aec3	1265	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1266	* @retval The value of the received data.
mbed_official	130:1dec54e4aec3	1267	*/
mbed_official	130:1dec54e4aec3	1268	uint8_t I2C_ReceiveData(I2C_TypeDef* I2Cx)
mbed_official	130:1dec54e4aec3	1269	{
mbed_official	130:1dec54e4aec3	1270	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1271	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1272
mbed_official	130:1dec54e4aec3	1273	/* Return the data in the DR register */
mbed_official	130:1dec54e4aec3	1274	return (uint8_t)I2Cx->RXDR;
mbed_official	130:1dec54e4aec3	1275	}
mbed_official	130:1dec54e4aec3	1276
mbed_official	130:1dec54e4aec3	1277	/**
mbed_official	130:1dec54e4aec3	1278	* @}
mbed_official	130:1dec54e4aec3	1279	*/
mbed_official	130:1dec54e4aec3	1280
mbed_official	130:1dec54e4aec3	1281
mbed_official	130:1dec54e4aec3	1282	/** @defgroup I2C_Group6 DMA transfers management functions
mbed_official	130:1dec54e4aec3	1283	* @brief DMA transfers management functions
mbed_official	130:1dec54e4aec3	1284	*
mbed_official	130:1dec54e4aec3	1285	@verbatim
mbed_official	130:1dec54e4aec3	1286	===============================================================================
mbed_official	130:1dec54e4aec3	1287	##### DMA transfers management functions #####
mbed_official	130:1dec54e4aec3	1288	===============================================================================
mbed_official	130:1dec54e4aec3	1289	[..] This section provides two functions that can be used only in DMA mode.
mbed_official	130:1dec54e4aec3	1290	[..] In DMA Mode, the I2C communication can be managed by 2 DMA Channel
mbed_official	130:1dec54e4aec3	1291	requests:
mbed_official	130:1dec54e4aec3	1292	(#) I2C_DMAReq_Tx: specifies the Tx buffer DMA transfer request.
mbed_official	130:1dec54e4aec3	1293	(#) I2C_DMAReq_Rx: specifies the Rx buffer DMA transfer request.
mbed_official	130:1dec54e4aec3	1294	[..] In this Mode it is advised to use the following function:
mbed_official	130:1dec54e4aec3	1295	(+) I2C_DMACmd(I2C_TypeDef* I2Cx, uint32_t I2C_DMAReq, FunctionalState NewState);
mbed_official	130:1dec54e4aec3	1296	@endverbatim
mbed_official	130:1dec54e4aec3	1297	* @{
mbed_official	130:1dec54e4aec3	1298	*/
mbed_official	130:1dec54e4aec3	1299
mbed_official	130:1dec54e4aec3	1300	/**
mbed_official	130:1dec54e4aec3	1301	* @brief Enables or disables the I2C DMA interface.
mbed_official	130:1dec54e4aec3	1302	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1303	* @param I2C_DMAReq: specifies the I2C DMA transfer request to be enabled or disabled.
mbed_official	130:1dec54e4aec3	1304	* This parameter can be any combination of the following values:
mbed_official	130:1dec54e4aec3	1305	* @arg I2C_DMAReq_Tx: Tx DMA transfer request
mbed_official	130:1dec54e4aec3	1306	* @arg I2C_DMAReq_Rx: Rx DMA transfer request
mbed_official	130:1dec54e4aec3	1307	* @param NewState: new state of the selected I2C DMA transfer request.
mbed_official	130:1dec54e4aec3	1308	* This parameter can be: ENABLE or DISABLE.
mbed_official	130:1dec54e4aec3	1309	* @retval None
mbed_official	130:1dec54e4aec3	1310	*/
mbed_official	130:1dec54e4aec3	1311	void I2C_DMACmd(I2C_TypeDef* I2Cx, uint32_t I2C_DMAReq, FunctionalState NewState)
mbed_official	130:1dec54e4aec3	1312	{
mbed_official	130:1dec54e4aec3	1313	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1314	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1315	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	130:1dec54e4aec3	1316	assert_param(IS_I2C_DMA_REQ(I2C_DMAReq));
mbed_official	130:1dec54e4aec3	1317
mbed_official	130:1dec54e4aec3	1318	if (NewState != DISABLE)
mbed_official	130:1dec54e4aec3	1319	{
mbed_official	130:1dec54e4aec3	1320	/* Enable the selected I2C DMA requests */
mbed_official	130:1dec54e4aec3	1321	I2Cx->CR1 \|= I2C_DMAReq;
mbed_official	130:1dec54e4aec3	1322	}
mbed_official	130:1dec54e4aec3	1323	else
mbed_official	130:1dec54e4aec3	1324	{
mbed_official	130:1dec54e4aec3	1325	/* Disable the selected I2C DMA requests */
mbed_official	130:1dec54e4aec3	1326	I2Cx->CR1 &= (uint32_t)~I2C_DMAReq;
mbed_official	130:1dec54e4aec3	1327	}
mbed_official	130:1dec54e4aec3	1328	}
mbed_official	130:1dec54e4aec3	1329	/**
mbed_official	130:1dec54e4aec3	1330	* @}
mbed_official	130:1dec54e4aec3	1331	*/
mbed_official	130:1dec54e4aec3	1332
mbed_official	130:1dec54e4aec3	1333
mbed_official	130:1dec54e4aec3	1334	/** @defgroup I2C_Group7 Interrupts and flags management functions
mbed_official	130:1dec54e4aec3	1335	* @brief Interrupts and flags management functions
mbed_official	130:1dec54e4aec3	1336	*
mbed_official	130:1dec54e4aec3	1337	@verbatim
mbed_official	130:1dec54e4aec3	1338	===============================================================================
mbed_official	130:1dec54e4aec3	1339	##### Interrupts and flags management functions #####
mbed_official	130:1dec54e4aec3	1340	===============================================================================
mbed_official	130:1dec54e4aec3	1341	[..] This section provides functions allowing to configure the I2C Interrupts
mbed_official	130:1dec54e4aec3	1342	sources and check or clear the flags or pending bits status.
mbed_official	130:1dec54e4aec3	1343	The user should identify which mode will be used in his application to manage
mbed_official	130:1dec54e4aec3	1344	the communication: Polling mode, Interrupt mode or DMA mode(refer I2C_Group6).
mbed_official	130:1dec54e4aec3	1345
mbed_official	130:1dec54e4aec3	1346	* Polling Mode *
mbed_official	130:1dec54e4aec3	1347	====================
mbed_official	130:1dec54e4aec3	1348	[..] In Polling Mode, the I2C communication can be managed by 15 flags:
mbed_official	130:1dec54e4aec3	1349	(#) I2C_FLAG_TXE: to indicate the status of Transmit data register empty flag.
mbed_official	130:1dec54e4aec3	1350	(#) I2C_FLAG_TXIS: to indicate the status of Transmit interrupt status flag .
mbed_official	130:1dec54e4aec3	1351	(#) I2C_FLAG_RXNE: to indicate the status of Receive data register not empty flag.
mbed_official	130:1dec54e4aec3	1352	(#) I2C_FLAG_ADDR: to indicate the status of Address matched flag (slave mode).
mbed_official	130:1dec54e4aec3	1353	(#) I2C_FLAG_NACKF: to indicate the status of NACK received flag.
mbed_official	130:1dec54e4aec3	1354	(#) I2C_FLAG_STOPF: to indicate the status of STOP detection flag.
mbed_official	130:1dec54e4aec3	1355	(#) I2C_FLAG_TC: to indicate the status of Transfer complete flag(master mode).
mbed_official	130:1dec54e4aec3	1356	(#) I2C_FLAG_TCR: to indicate the status of Transfer complete reload flag.
mbed_official	130:1dec54e4aec3	1357	(#) I2C_FLAG_BERR: to indicate the status of Bus error flag.
mbed_official	130:1dec54e4aec3	1358	(#) I2C_FLAG_ARLO: to indicate the status of Arbitration lost flag.
mbed_official	130:1dec54e4aec3	1359	(#) I2C_FLAG_OVR: to indicate the status of Overrun/Underrun flag.
mbed_official	130:1dec54e4aec3	1360	(#) I2C_FLAG_PECERR: to indicate the status of PEC error in reception flag.
mbed_official	130:1dec54e4aec3	1361	(#) I2C_FLAG_TIMEOUT: to indicate the status of Timeout or Tlow detection flag.
mbed_official	130:1dec54e4aec3	1362	(#) I2C_FLAG_ALERT: to indicate the status of SMBus Alert flag.
mbed_official	130:1dec54e4aec3	1363	(#) I2C_FLAG_BUSY: to indicate the status of Bus busy flag.
mbed_official	130:1dec54e4aec3	1364
mbed_official	130:1dec54e4aec3	1365	[..] In this Mode it is advised to use the following functions:
mbed_official	130:1dec54e4aec3	1366	(+) FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG);
mbed_official	130:1dec54e4aec3	1367	(+) void I2C_ClearFlag(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG);
mbed_official	130:1dec54e4aec3	1368
mbed_official	130:1dec54e4aec3	1369	[..]
mbed_official	130:1dec54e4aec3	1370	(@)Do not use the BUSY flag to handle each data transmission or reception.It is
mbed_official	130:1dec54e4aec3	1371	better to use the TXIS and RXNE flags instead.
mbed_official	130:1dec54e4aec3	1372
mbed_official	130:1dec54e4aec3	1373	* Interrupt Mode *
mbed_official	130:1dec54e4aec3	1374	======================
mbed_official	130:1dec54e4aec3	1375	[..] In Interrupt Mode, the I2C communication can be managed by 7 interrupt sources
mbed_official	130:1dec54e4aec3	1376	and 15 pending bits:
mbed_official	130:1dec54e4aec3	1377	[..] Interrupt Source:
mbed_official	130:1dec54e4aec3	1378	(#) I2C_IT_ERRI: specifies the interrupt source for the Error interrupt.
mbed_official	130:1dec54e4aec3	1379	(#) I2C_IT_TCI: specifies the interrupt source for the Transfer Complete interrupt.
mbed_official	130:1dec54e4aec3	1380	(#) I2C_IT_STOPI: specifies the interrupt source for the Stop Detection interrupt.
mbed_official	130:1dec54e4aec3	1381	(#) I2C_IT_NACKI: specifies the interrupt source for the Not Acknowledge received interrupt.
mbed_official	130:1dec54e4aec3	1382	(#) I2C_IT_ADDRI: specifies the interrupt source for the Address Match interrupt.
mbed_official	130:1dec54e4aec3	1383	(#) I2C_IT_RXI: specifies the interrupt source for the RX interrupt.
mbed_official	130:1dec54e4aec3	1384	(#) I2C_IT_TXI: specifies the interrupt source for the TX interrupt.
mbed_official	130:1dec54e4aec3	1385
mbed_official	130:1dec54e4aec3	1386	[..] Pending Bits:
mbed_official	130:1dec54e4aec3	1387	(#) I2C_IT_TXIS: to indicate the status of Transmit interrupt status flag.
mbed_official	130:1dec54e4aec3	1388	(#) I2C_IT_RXNE: to indicate the status of Receive data register not empty flag.
mbed_official	130:1dec54e4aec3	1389	(#) I2C_IT_ADDR: to indicate the status of Address matched flag (slave mode).
mbed_official	130:1dec54e4aec3	1390	(#) I2C_IT_NACKF: to indicate the status of NACK received flag.
mbed_official	130:1dec54e4aec3	1391	(#) I2C_IT_STOPF: to indicate the status of STOP detection flag.
mbed_official	130:1dec54e4aec3	1392	(#) I2C_IT_TC: to indicate the status of Transfer complete flag (master mode).
mbed_official	130:1dec54e4aec3	1393	(#) I2C_IT_TCR: to indicate the status of Transfer complete reload flag.
mbed_official	130:1dec54e4aec3	1394	(#) I2C_IT_BERR: to indicate the status of Bus error flag.
mbed_official	130:1dec54e4aec3	1395	(#) I2C_IT_ARLO: to indicate the status of Arbitration lost flag.
mbed_official	130:1dec54e4aec3	1396	(#) I2C_IT_OVR: to indicate the status of Overrun/Underrun flag.
mbed_official	130:1dec54e4aec3	1397	(#) I2C_IT_PECERR: to indicate the status of PEC error in reception flag.
mbed_official	130:1dec54e4aec3	1398	(#) I2C_IT_TIMEOUT: to indicate the status of Timeout or Tlow detection flag.
mbed_official	130:1dec54e4aec3	1399	(#) I2C_IT_ALERT: to indicate the status of SMBus Alert flag.
mbed_official	130:1dec54e4aec3	1400
mbed_official	130:1dec54e4aec3	1401	[..] In this Mode it is advised to use the following functions:
mbed_official	130:1dec54e4aec3	1402	(+) void I2C_ClearITPendingBit(I2C_TypeDef* I2Cx, uint32_t I2C_IT);
mbed_official	130:1dec54e4aec3	1403	(+) ITStatus I2C_GetITStatus(I2C_TypeDef* I2Cx, uint32_t I2C_IT);
mbed_official	130:1dec54e4aec3	1404
mbed_official	130:1dec54e4aec3	1405	@endverbatim
mbed_official	130:1dec54e4aec3	1406	* @{
mbed_official	130:1dec54e4aec3	1407	*/
mbed_official	130:1dec54e4aec3	1408
mbed_official	130:1dec54e4aec3	1409	/**
mbed_official	130:1dec54e4aec3	1410	* @brief Checks whether the specified I2C flag is set or not.
mbed_official	130:1dec54e4aec3	1411	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1412	* @param I2C_FLAG: specifies the flag to check.
mbed_official	130:1dec54e4aec3	1413	* This parameter can be one of the following values:
mbed_official	130:1dec54e4aec3	1414	* @arg I2C_FLAG_TXE: Transmit data register empty
mbed_official	130:1dec54e4aec3	1415	* @arg I2C_FLAG_TXIS: Transmit interrupt status
mbed_official	130:1dec54e4aec3	1416	* @arg I2C_FLAG_RXNE: Receive data register not empty
mbed_official	130:1dec54e4aec3	1417	* @arg I2C_FLAG_ADDR: Address matched (slave mode)
mbed_official	130:1dec54e4aec3	1418	* @arg I2C_FLAG_NACKF: NACK received flag
mbed_official	130:1dec54e4aec3	1419	* @arg I2C_FLAG_STOPF: STOP detection flag
mbed_official	130:1dec54e4aec3	1420	* @arg I2C_FLAG_TC: Transfer complete (master mode)
mbed_official	130:1dec54e4aec3	1421	* @arg I2C_FLAG_TCR: Transfer complete reload
mbed_official	130:1dec54e4aec3	1422	* @arg I2C_FLAG_BERR: Bus error
mbed_official	130:1dec54e4aec3	1423	* @arg I2C_FLAG_ARLO: Arbitration lost
mbed_official	130:1dec54e4aec3	1424	* @arg I2C_FLAG_OVR: Overrun/Underrun
mbed_official	130:1dec54e4aec3	1425	* @arg I2C_FLAG_PECERR: PEC error in reception
mbed_official	130:1dec54e4aec3	1426	* @arg I2C_FLAG_TIMEOUT: Timeout or Tlow detection flag
mbed_official	130:1dec54e4aec3	1427	* @arg I2C_FLAG_ALERT: SMBus Alert
mbed_official	130:1dec54e4aec3	1428	* @arg I2C_FLAG_BUSY: Bus busy
mbed_official	130:1dec54e4aec3	1429	* @retval The new state of I2C_FLAG (SET or RESET).
mbed_official	130:1dec54e4aec3	1430	*/
mbed_official	130:1dec54e4aec3	1431	FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG)
mbed_official	130:1dec54e4aec3	1432	{
mbed_official	130:1dec54e4aec3	1433	uint32_t tmpreg = 0;
mbed_official	130:1dec54e4aec3	1434	FlagStatus bitstatus = RESET;
mbed_official	130:1dec54e4aec3	1435
mbed_official	130:1dec54e4aec3	1436	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1437	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1438	assert_param(IS_I2C_GET_FLAG(I2C_FLAG));
mbed_official	130:1dec54e4aec3	1439
mbed_official	130:1dec54e4aec3	1440	/* Get the ISR register value */
mbed_official	130:1dec54e4aec3	1441	tmpreg = I2Cx->ISR;
mbed_official	130:1dec54e4aec3	1442
mbed_official	130:1dec54e4aec3	1443	/* Get flag status */
mbed_official	130:1dec54e4aec3	1444	tmpreg &= I2C_FLAG;
mbed_official	130:1dec54e4aec3	1445
mbed_official	130:1dec54e4aec3	1446	if(tmpreg != 0)
mbed_official	130:1dec54e4aec3	1447	{
mbed_official	130:1dec54e4aec3	1448	/* I2C_FLAG is set */
mbed_official	130:1dec54e4aec3	1449	bitstatus = SET;
mbed_official	130:1dec54e4aec3	1450	}
mbed_official	130:1dec54e4aec3	1451	else
mbed_official	130:1dec54e4aec3	1452	{
mbed_official	130:1dec54e4aec3	1453	/* I2C_FLAG is reset */
mbed_official	130:1dec54e4aec3	1454	bitstatus = RESET;
mbed_official	130:1dec54e4aec3	1455	}
mbed_official	130:1dec54e4aec3	1456	return bitstatus;
mbed_official	130:1dec54e4aec3	1457	}
mbed_official	130:1dec54e4aec3	1458
mbed_official	130:1dec54e4aec3	1459	/**
mbed_official	130:1dec54e4aec3	1460	* @brief Clears the I2Cx's pending flags.
mbed_official	130:1dec54e4aec3	1461	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1462	* @param I2C_FLAG: specifies the flag to clear.
mbed_official	130:1dec54e4aec3	1463	* This parameter can be any combination of the following values:
mbed_official	130:1dec54e4aec3	1464	* @arg I2C_FLAG_ADDR: Address matched (slave mode)
mbed_official	130:1dec54e4aec3	1465	* @arg I2C_FLAG_NACKF: NACK received flag
mbed_official	130:1dec54e4aec3	1466	* @arg I2C_FLAG_STOPF: STOP detection flag
mbed_official	130:1dec54e4aec3	1467	* @arg I2C_FLAG_BERR: Bus error
mbed_official	130:1dec54e4aec3	1468	* @arg I2C_FLAG_ARLO: Arbitration lost
mbed_official	130:1dec54e4aec3	1469	* @arg I2C_FLAG_OVR: Overrun/Underrun
mbed_official	130:1dec54e4aec3	1470	* @arg I2C_FLAG_PECERR: PEC error in reception
mbed_official	130:1dec54e4aec3	1471	* @arg I2C_FLAG_TIMEOUT: Timeout or Tlow detection flag
mbed_official	130:1dec54e4aec3	1472	* @arg I2C_FLAG_ALERT: SMBus Alert
mbed_official	130:1dec54e4aec3	1473	* @retval The new state of I2C_FLAG (SET or RESET).
mbed_official	130:1dec54e4aec3	1474	*/
mbed_official	130:1dec54e4aec3	1475	void I2C_ClearFlag(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG)
mbed_official	130:1dec54e4aec3	1476	{
mbed_official	130:1dec54e4aec3	1477	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1478	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1479	assert_param(IS_I2C_CLEAR_FLAG(I2C_FLAG));
mbed_official	130:1dec54e4aec3	1480
mbed_official	130:1dec54e4aec3	1481	/* Clear the selected flag */
mbed_official	130:1dec54e4aec3	1482	I2Cx->ICR = I2C_FLAG;
mbed_official	130:1dec54e4aec3	1483	}
mbed_official	130:1dec54e4aec3	1484
mbed_official	130:1dec54e4aec3	1485	/**
mbed_official	130:1dec54e4aec3	1486	* @brief Checks whether the specified I2C interrupt has occurred or not.
mbed_official	130:1dec54e4aec3	1487	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1488	* @param I2C_IT: specifies the interrupt source to check.
mbed_official	130:1dec54e4aec3	1489	* This parameter can be one of the following values:
mbed_official	130:1dec54e4aec3	1490	* @arg I2C_IT_TXIS: Transmit interrupt status
mbed_official	130:1dec54e4aec3	1491	* @arg I2C_IT_RXNE: Receive data register not empty
mbed_official	130:1dec54e4aec3	1492	* @arg I2C_IT_ADDR: Address matched (slave mode)
mbed_official	130:1dec54e4aec3	1493	* @arg I2C_IT_NACKF: NACK received flag
mbed_official	130:1dec54e4aec3	1494	* @arg I2C_IT_STOPF: STOP detection flag
mbed_official	130:1dec54e4aec3	1495	* @arg I2C_IT_TC: Transfer complete (master mode)
mbed_official	130:1dec54e4aec3	1496	* @arg I2C_IT_TCR: Transfer complete reload
mbed_official	130:1dec54e4aec3	1497	* @arg I2C_IT_BERR: Bus error
mbed_official	130:1dec54e4aec3	1498	* @arg I2C_IT_ARLO: Arbitration lost
mbed_official	130:1dec54e4aec3	1499	* @arg I2C_IT_OVR: Overrun/Underrun
mbed_official	130:1dec54e4aec3	1500	* @arg I2C_IT_PECERR: PEC error in reception
mbed_official	130:1dec54e4aec3	1501	* @arg I2C_IT_TIMEOUT: Timeout or Tlow detection flag
mbed_official	130:1dec54e4aec3	1502	* @arg I2C_IT_ALERT: SMBus Alert
mbed_official	130:1dec54e4aec3	1503	* @retval The new state of I2C_IT (SET or RESET).
mbed_official	130:1dec54e4aec3	1504	*/
mbed_official	130:1dec54e4aec3	1505	ITStatus I2C_GetITStatus(I2C_TypeDef* I2Cx, uint32_t I2C_IT)
mbed_official	130:1dec54e4aec3	1506	{
mbed_official	130:1dec54e4aec3	1507	uint32_t tmpreg = 0;
mbed_official	130:1dec54e4aec3	1508	ITStatus bitstatus = RESET;
mbed_official	130:1dec54e4aec3	1509	uint32_t enablestatus = 0;
mbed_official	130:1dec54e4aec3	1510
mbed_official	130:1dec54e4aec3	1511	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1512	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1513	assert_param(IS_I2C_GET_IT(I2C_IT));
mbed_official	130:1dec54e4aec3	1514
mbed_official	130:1dec54e4aec3	1515	/* Check if the interrupt source is enabled or not */
mbed_official	130:1dec54e4aec3	1516	/* If Error interrupt */
mbed_official	130:1dec54e4aec3	1517	if ((uint32_t)(I2C_IT & ERROR_IT_MASK))
mbed_official	130:1dec54e4aec3	1518	{
mbed_official	130:1dec54e4aec3	1519	enablestatus = (uint32_t)((I2C_CR1_ERRIE) & (I2Cx->CR1));
mbed_official	130:1dec54e4aec3	1520	}
mbed_official	130:1dec54e4aec3	1521	/* If TC interrupt */
mbed_official	130:1dec54e4aec3	1522	else if ((uint32_t)(I2C_IT & TC_IT_MASK))
mbed_official	130:1dec54e4aec3	1523	{
mbed_official	130:1dec54e4aec3	1524	enablestatus = (uint32_t)((I2C_CR1_TCIE) & (I2Cx->CR1));
mbed_official	130:1dec54e4aec3	1525	}
mbed_official	130:1dec54e4aec3	1526	else
mbed_official	130:1dec54e4aec3	1527	{
mbed_official	130:1dec54e4aec3	1528	enablestatus = (uint32_t)((I2C_IT) & (I2Cx->CR1));
mbed_official	130:1dec54e4aec3	1529	}
mbed_official	130:1dec54e4aec3	1530
mbed_official	130:1dec54e4aec3	1531	/* Get the ISR register value */
mbed_official	130:1dec54e4aec3	1532	tmpreg = I2Cx->ISR;
mbed_official	130:1dec54e4aec3	1533
mbed_official	130:1dec54e4aec3	1534	/* Get flag status */
mbed_official	130:1dec54e4aec3	1535	tmpreg &= I2C_IT;
mbed_official	130:1dec54e4aec3	1536
mbed_official	130:1dec54e4aec3	1537	/* Check the status of the specified I2C flag */
mbed_official	130:1dec54e4aec3	1538	if((tmpreg != RESET) && enablestatus)
mbed_official	130:1dec54e4aec3	1539	{
mbed_official	130:1dec54e4aec3	1540	/* I2C_IT is set */
mbed_official	130:1dec54e4aec3	1541	bitstatus = SET;
mbed_official	130:1dec54e4aec3	1542	}
mbed_official	130:1dec54e4aec3	1543	else
mbed_official	130:1dec54e4aec3	1544	{
mbed_official	130:1dec54e4aec3	1545	/* I2C_IT is reset */
mbed_official	130:1dec54e4aec3	1546	bitstatus = RESET;
mbed_official	130:1dec54e4aec3	1547	}
mbed_official	130:1dec54e4aec3	1548
mbed_official	130:1dec54e4aec3	1549	/* Return the I2C_IT status */
mbed_official	130:1dec54e4aec3	1550	return bitstatus;
mbed_official	130:1dec54e4aec3	1551	}
mbed_official	130:1dec54e4aec3	1552
mbed_official	130:1dec54e4aec3	1553	/**
mbed_official	130:1dec54e4aec3	1554	* @brief Clears the I2Cx's interrupt pending bits.
mbed_official	130:1dec54e4aec3	1555	* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
mbed_official	130:1dec54e4aec3	1556	* @param I2C_IT: specifies the interrupt pending bit to clear.
mbed_official	130:1dec54e4aec3	1557	* This parameter can be any combination of the following values:
mbed_official	130:1dec54e4aec3	1558	* @arg I2C_IT_ADDR: Address matched (slave mode)
mbed_official	130:1dec54e4aec3	1559	* @arg I2C_IT_NACKF: NACK received flag
mbed_official	130:1dec54e4aec3	1560	* @arg I2C_IT_STOPF: STOP detection flag
mbed_official	130:1dec54e4aec3	1561	* @arg I2C_IT_BERR: Bus error
mbed_official	130:1dec54e4aec3	1562	* @arg I2C_IT_ARLO: Arbitration lost
mbed_official	130:1dec54e4aec3	1563	* @arg I2C_IT_OVR: Overrun/Underrun
mbed_official	130:1dec54e4aec3	1564	* @arg I2C_IT_PECERR: PEC error in reception
mbed_official	130:1dec54e4aec3	1565	* @arg I2C_IT_TIMEOUT: Timeout or Tlow detection flag
mbed_official	130:1dec54e4aec3	1566	* @arg I2C_IT_ALERT: SMBus Alert
mbed_official	130:1dec54e4aec3	1567	* @retval The new state of I2C_IT (SET or RESET).
mbed_official	130:1dec54e4aec3	1568	*/
mbed_official	130:1dec54e4aec3	1569	void I2C_ClearITPendingBit(I2C_TypeDef* I2Cx, uint32_t I2C_IT)
mbed_official	130:1dec54e4aec3	1570	{
mbed_official	130:1dec54e4aec3	1571	/* Check the parameters */
mbed_official	130:1dec54e4aec3	1572	assert_param(IS_I2C_ALL_PERIPH(I2Cx));
mbed_official	130:1dec54e4aec3	1573	assert_param(IS_I2C_CLEAR_IT(I2C_IT));
mbed_official	130:1dec54e4aec3	1574
mbed_official	130:1dec54e4aec3	1575	/* Clear the selected flag */
mbed_official	130:1dec54e4aec3	1576	I2Cx->ICR = I2C_IT;
mbed_official	130:1dec54e4aec3	1577	}
mbed_official	130:1dec54e4aec3	1578
mbed_official	130:1dec54e4aec3	1579	/**
mbed_official	130:1dec54e4aec3	1580	* @}
mbed_official	130:1dec54e4aec3	1581	*/
mbed_official	130:1dec54e4aec3	1582
mbed_official	130:1dec54e4aec3	1583	/**
mbed_official	130:1dec54e4aec3	1584	* @}
mbed_official	130:1dec54e4aec3	1585	*/
mbed_official	130:1dec54e4aec3	1586
mbed_official	130:1dec54e4aec3	1587	/**
mbed_official	130:1dec54e4aec3	1588	* @}
mbed_official	130:1dec54e4aec3	1589	*/
mbed_official	130:1dec54e4aec3	1590
mbed_official	130:1dec54e4aec3	1591	/**
mbed_official	130:1dec54e4aec3	1592	* @}
mbed_official	130:1dec54e4aec3	1593	*/
mbed_official	130:1dec54e4aec3	1594
mbed_official	130:1dec54e4aec3	1595	/********************** (C) COPYRIGHT STMicroelectronics *END OF FILE**/

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Type:	Library
Created:	13 Sep 2014
Imports:	4
Forks:	0
Commits:	324
Dependents:	1
Dependencies:	0
Followers:	2

targets/cmsis/TARGET_STM/TARGET_DISCO_F051R8/stm32f0xx_i2c.c@130:1dec54e4aec3, 2014-03-21 (annotated)

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