diff options
Diffstat (limited to 'stm32lib/src/stm32f10x_i2c.c')
| -rw-r--r-- | stm32lib/src/stm32f10x_i2c.c | 1216 |
1 files changed, 0 insertions, 1216 deletions
diff --git a/stm32lib/src/stm32f10x_i2c.c b/stm32lib/src/stm32f10x_i2c.c deleted file mode 100644 index 360f71d..0000000 --- a/stm32lib/src/stm32f10x_i2c.c +++ /dev/null @@ -1,1216 +0,0 @@ -/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
-* File Name : stm32f10x_i2c.c
-* Author : MCD Application Team
-* Version : V2.0.2
-* Date : 07/11/2008
-* Description : This file provides all the I2C firmware functions.
-********************************************************************************
-* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
-* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
-* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
-* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
-* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
-* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
-*******************************************************************************/
-
-/* Includes ------------------------------------------------------------------*/
-#include "stm32f10x_i2c.h"
-#include "stm32f10x_rcc.h"
-
-/* Private typedef -----------------------------------------------------------*/
-/* Private define ------------------------------------------------------------*/
-/* I2C SPE mask */
-#define CR1_PE_Set ((u16)0x0001)
-#define CR1_PE_Reset ((u16)0xFFFE)
-
-/* I2C START mask */
-#define CR1_START_Set ((u16)0x0100)
-#define CR1_START_Reset ((u16)0xFEFF)
-
-/* I2C STOP mask */
-#define CR1_STOP_Set ((u16)0x0200)
-#define CR1_STOP_Reset ((u16)0xFDFF)
-
-/* I2C ACK mask */
-#define CR1_ACK_Set ((u16)0x0400)
-#define CR1_ACK_Reset ((u16)0xFBFF)
-
-/* I2C ENGC mask */
-#define CR1_ENGC_Set ((u16)0x0040)
-#define CR1_ENGC_Reset ((u16)0xFFBF)
-
-/* I2C SWRST mask */
-#define CR1_SWRST_Set ((u16)0x8000)
-#define CR1_SWRST_Reset ((u16)0x7FFF)
-
-/* I2C PEC mask */
-#define CR1_PEC_Set ((u16)0x1000)
-#define CR1_PEC_Reset ((u16)0xEFFF)
-
-/* I2C ENPEC mask */
-#define CR1_ENPEC_Set ((u16)0x0020)
-#define CR1_ENPEC_Reset ((u16)0xFFDF)
-
-/* I2C ENARP mask */
-#define CR1_ENARP_Set ((u16)0x0010)
-#define CR1_ENARP_Reset ((u16)0xFFEF)
-
-/* I2C NOSTRETCH mask */
-#define CR1_NOSTRETCH_Set ((u16)0x0080)
-#define CR1_NOSTRETCH_Reset ((u16)0xFF7F)
-
-/* I2C registers Masks */
-#define CR1_CLEAR_Mask ((u16)0xFBF5)
-
-/* I2C DMAEN mask */
-#define CR2_DMAEN_Set ((u16)0x0800)
-#define CR2_DMAEN_Reset ((u16)0xF7FF)
-
-/* I2C LAST mask */
-#define CR2_LAST_Set ((u16)0x1000)
-#define CR2_LAST_Reset ((u16)0xEFFF)
-
-/* I2C FREQ mask */
-#define CR2_FREQ_Reset ((u16)0xFFC0)
-
-/* I2C ADD0 mask */
-#define OAR1_ADD0_Set ((u16)0x0001)
-#define OAR1_ADD0_Reset ((u16)0xFFFE)
-
-/* I2C ENDUAL mask */
-#define OAR2_ENDUAL_Set ((u16)0x0001)
-#define OAR2_ENDUAL_Reset ((u16)0xFFFE)
-
-/* I2C ADD2 mask */
-#define OAR2_ADD2_Reset ((u16)0xFF01)
-
-/* I2C F/S mask */
-#define CCR_FS_Set ((u16)0x8000)
-
-/* I2C CCR mask */
-#define CCR_CCR_Set ((u16)0x0FFF)
-
-/* I2C FLAG mask */
-#define FLAG_Mask ((u32)0x00FFFFFF)
-
-/* I2C Interrupt Enable mask */
-#define ITEN_Mask ((u32)0x07000000)
-
-/* Private macro -------------------------------------------------------------*/
-/* Private variables ---------------------------------------------------------*/
-/* Private function prototypes -----------------------------------------------*/
-/* Private functions ---------------------------------------------------------*/
-
-/*******************************************************************************
-* Function Name : I2C_DeInit
-* Description : Deinitializes the I2Cx peripheral registers to their default
-* reset values.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_DeInit(I2C_TypeDef* I2Cx)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
-
- switch (*(u32*)&I2Cx)
- {
- case I2C1_BASE:
- /* Enable I2C1 reset state */
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, ENABLE);
- /* Release I2C1 from reset state */
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, DISABLE);
- break;
-
- case I2C2_BASE:
- /* Enable I2C2 reset state */
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2, ENABLE);
- /* Release I2C2 from reset state */
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2, DISABLE);
- break;
-
- default:
- break;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_Init
-* Description : Initializes the I2Cx peripheral according to the specified
-* parameters in the I2C_InitStruct.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - I2C_InitStruct: pointer to a I2C_InitTypeDef structure that
-* contains the configuration information for the specified
-* I2C peripheral.
-* Output : None
-* Return : None
-******************************************************************************/
-void I2C_Init(I2C_TypeDef* I2Cx, I2C_InitTypeDef* I2C_InitStruct)
-{
- u16 tmpreg = 0, freqrange = 0;
- u16 result = 0x04;
- u32 pclk1 = 8000000;
- RCC_ClocksTypeDef rcc_clocks;
-
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_MODE(I2C_InitStruct->I2C_Mode));
- assert_param(IS_I2C_DUTY_CYCLE(I2C_InitStruct->I2C_DutyCycle));
- assert_param(IS_I2C_OWN_ADDRESS1(I2C_InitStruct->I2C_OwnAddress1));
- assert_param(IS_I2C_ACK_STATE(I2C_InitStruct->I2C_Ack));
- assert_param(IS_I2C_ACKNOWLEDGE_ADDRESS(I2C_InitStruct->I2C_AcknowledgedAddress));
- assert_param(IS_I2C_CLOCK_SPEED(I2C_InitStruct->I2C_ClockSpeed));
-
-/*---------------------------- I2Cx CR2 Configuration ------------------------*/
- /* Get the I2Cx CR2 value */
- tmpreg = I2Cx->CR2;
- /* Clear frequency FREQ[5:0] bits */
- tmpreg &= CR2_FREQ_Reset;
- /* Get pclk1 frequency value */
- RCC_GetClocksFreq(&rcc_clocks);
- pclk1 = rcc_clocks.PCLK1_Frequency;
- /* Set frequency bits depending on pclk1 value */
- freqrange = (u16)(pclk1 / 1000000);
- tmpreg |= freqrange;
- /* Write to I2Cx CR2 */
- I2Cx->CR2 = tmpreg;
-
-/*---------------------------- I2Cx CCR Configuration ------------------------*/
- /* Disable the selected I2C peripheral to configure TRISE */
- I2Cx->CR1 &= CR1_PE_Reset;
-
- /* Reset tmpreg value */
- /* Clear F/S, DUTY and CCR[11:0] bits */
- tmpreg = 0;
-
- /* Configure speed in standard mode */
- if (I2C_InitStruct->I2C_ClockSpeed <= 100000)
- {
- /* Standard mode speed calculate */
- result = (u16)(pclk1 / (I2C_InitStruct->I2C_ClockSpeed << 1));
- /* Test if CCR value is under 0x4*/
- if (result < 0x04)
- {
- /* Set minimum allowed value */
- result = 0x04;
- }
- /* Set speed value for standard mode */
- tmpreg |= result;
- /* Set Maximum Rise Time for standard mode */
- I2Cx->TRISE = freqrange + 1;
- }
- /* Configure speed in fast mode */
- else /*(I2C_InitStruct->I2C_ClockSpeed <= 400000)*/
- {
- if (I2C_InitStruct->I2C_DutyCycle == I2C_DutyCycle_2)
- {
- /* Fast mode speed calculate: Tlow/Thigh = 2 */
- result = (u16)(pclk1 / (I2C_InitStruct->I2C_ClockSpeed * 3));
- }
- else /*I2C_InitStruct->I2C_DutyCycle == I2C_DutyCycle_16_9*/
- {
- /* Fast mode speed calculate: Tlow/Thigh = 16/9 */
- result = (u16)(pclk1 / (I2C_InitStruct->I2C_ClockSpeed * 25));
- /* Set DUTY bit */
- result |= I2C_DutyCycle_16_9;
- }
- /* Test if CCR value is under 0x1*/
- if ((result & CCR_CCR_Set) == 0)
- {
- /* Set minimum allowed value */
- result |= (u16)0x0001;
- }
- /* Set speed value and set F/S bit for fast mode */
- tmpreg |= result | CCR_FS_Set;
- /* Set Maximum Rise Time for fast mode */
- I2Cx->TRISE = (u16)(((freqrange * 300) / 1000) + 1);
- }
- /* Write to I2Cx CCR */
- I2Cx->CCR = tmpreg;
-
- /* Enable the selected I2C peripheral */
- I2Cx->CR1 |= CR1_PE_Set;
-
-/*---------------------------- I2Cx CR1 Configuration ------------------------*/
- /* Get the I2Cx CR1 value */
- tmpreg = I2Cx->CR1;
- /* Clear ACK, SMBTYPE and SMBUS bits */
- tmpreg &= CR1_CLEAR_Mask;
- /* Configure I2Cx: mode and acknowledgement */
- /* Set SMBTYPE and SMBUS bits according to I2C_Mode value */
- /* Set ACK bit according to I2C_Ack value */
- tmpreg |= (u16)((u32)I2C_InitStruct->I2C_Mode | I2C_InitStruct->I2C_Ack);
- /* Write to I2Cx CR1 */
- I2Cx->CR1 = tmpreg;
-
-/*---------------------------- I2Cx OAR1 Configuration -----------------------*/
- /* Set I2Cx Own Address1 and acknowledged address */
- I2Cx->OAR1 = (I2C_InitStruct->I2C_AcknowledgedAddress | I2C_InitStruct->I2C_OwnAddress1);
-}
-
-/*******************************************************************************
-* Function Name : I2C_StructInit
-* Description : Fills each I2C_InitStruct member with its default value.
-* Input : - I2C_InitStruct: pointer to an I2C_InitTypeDef structure
-* which will be initialized.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_StructInit(I2C_InitTypeDef* I2C_InitStruct)
-{
-/*---------------- Reset I2C init structure parameters values ----------------*/
- /* Initialize the I2C_Mode member */
- I2C_InitStruct->I2C_Mode = I2C_Mode_I2C;
-
- /* Initialize the I2C_DutyCycle member */
- I2C_InitStruct->I2C_DutyCycle = I2C_DutyCycle_2;
-
- /* Initialize the I2C_OwnAddress1 member */
- I2C_InitStruct->I2C_OwnAddress1 = 0;
-
- /* Initialize the I2C_Ack member */
- I2C_InitStruct->I2C_Ack = I2C_Ack_Disable;
-
- /* Initialize the I2C_AcknowledgedAddress member */
- I2C_InitStruct->I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
-
- /* initialize the I2C_ClockSpeed member */
- I2C_InitStruct->I2C_ClockSpeed = 5000;
-}
-
-/*******************************************************************************
-* Function Name : I2C_Cmd
-* Description : Enables or disables the specified I2C peripheral.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2Cx peripheral. This parameter
-* can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_Cmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the selected I2C peripheral */
- I2Cx->CR1 |= CR1_PE_Set;
- }
- else
- {
- /* Disable the selected I2C peripheral */
- I2Cx->CR1 &= CR1_PE_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_DMACmd
-* Description : Enables or disables the specified I2C DMA requests.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2C DMA transfer.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_DMACmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the selected I2C DMA requests */
- I2Cx->CR2 |= CR2_DMAEN_Set;
- }
- else
- {
- /* Disable the selected I2C DMA requests */
- I2Cx->CR2 &= CR2_DMAEN_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_DMALastTransferCmd
-* Description : Specifies that the next DMA transfer is the last one.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2C DMA last transfer.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_DMALastTransferCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Next DMA transfer is the last transfer */
- I2Cx->CR2 |= CR2_LAST_Set;
- }
- else
- {
- /* Next DMA transfer is not the last transfer */
- I2Cx->CR2 &= CR2_LAST_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_GenerateSTART
-* Description : Generates I2Cx communication START condition.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2C START condition generation.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None.
-*******************************************************************************/
-void I2C_GenerateSTART(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Generate a START condition */
- I2Cx->CR1 |= CR1_START_Set;
- }
- else
- {
- /* Disable the START condition generation */
- I2Cx->CR1 &= CR1_START_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_GenerateSTOP
-* Description : Generates I2Cx communication STOP condition.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2C STOP condition generation.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None.
-*******************************************************************************/
-void I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Generate a STOP condition */
- I2Cx->CR1 |= CR1_STOP_Set;
- }
- else
- {
- /* Disable the STOP condition generation */
- I2Cx->CR1 &= CR1_STOP_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_AcknowledgeConfig
-* Description : Enables or disables the specified I2C acknowledge feature.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2C Acknowledgement.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None.
-*******************************************************************************/
-void I2C_AcknowledgeConfig(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the acknowledgement */
- I2Cx->CR1 |= CR1_ACK_Set;
- }
- else
- {
- /* Disable the acknowledgement */
- I2Cx->CR1 &= CR1_ACK_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_OwnAddress2Config
-* Description : Configures the specified I2C own address2.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - Address: specifies the 7bit I2C own address2.
-* Output : None
-* Return : None.
-*******************************************************************************/
-void I2C_OwnAddress2Config(I2C_TypeDef* I2Cx, u8 Address)
-{
- u16 tmpreg = 0;
-
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
-
- /* Get the old register value */
- tmpreg = I2Cx->OAR2;
- /* Reset I2Cx Own address2 bit [7:1] */
- tmpreg &= OAR2_ADD2_Reset;
- /* Set I2Cx Own address2 */
- tmpreg |= (u16)(Address & (u16)0x00FE);
- /* Store the new register value */
- I2Cx->OAR2 = tmpreg;
-}
-
-/*******************************************************************************
-* Function Name : I2C_DualAddressCmd
-* Description : Enables or disables the specified I2C dual addressing mode.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2C dual addressing mode.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_DualAddressCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable dual addressing mode */
- I2Cx->OAR2 |= OAR2_ENDUAL_Set;
- }
- else
- {
- /* Disable dual addressing mode */
- I2Cx->OAR2 &= OAR2_ENDUAL_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_GeneralCallCmd
-* Description : Enables or disables the specified I2C general call feature.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2C General call.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_GeneralCallCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable generall call */
- I2Cx->CR1 |= CR1_ENGC_Set;
- }
- else
- {
- /* Disable generall call */
- I2Cx->CR1 &= CR1_ENGC_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_ITConfig
-* Description : Enables or disables the specified I2C interrupts.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - I2C_IT: specifies the I2C interrupts sources to be enabled
-* or disabled.
-* This parameter can be any combination of the following values:
-* - I2C_IT_BUF: Buffer interrupt mask
-* - I2C_IT_EVT: Event interrupt mask
-* - I2C_IT_ERR: Error interrupt mask
-* - NewState: new state of the specified I2C interrupts.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_ITConfig(I2C_TypeDef* I2Cx, u16 I2C_IT, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
- assert_param(IS_I2C_CONFIG_IT(I2C_IT));
-
- if (NewState != DISABLE)
- {
- /* Enable the selected I2C interrupts */
- I2Cx->CR2 |= I2C_IT;
- }
- else
- {
- /* Disable the selected I2C interrupts */
- I2Cx->CR2 &= (u16)~I2C_IT;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_SendData
-* Description : Sends a data byte through the I2Cx peripheral.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - Data: Byte to be transmitted..
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_SendData(I2C_TypeDef* I2Cx, u8 Data)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
-
- /* Write in the DR register the data to be sent */
- I2Cx->DR = Data;
-}
-
-/*******************************************************************************
-* Function Name : I2C_ReceiveData
-* Description : Returns the most recent received data by the I2Cx peripheral.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* Output : None
-* Return : The value of the received data.
-*******************************************************************************/
-u8 I2C_ReceiveData(I2C_TypeDef* I2Cx)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
-
- /* Return the data in the DR register */
- return (u8)I2Cx->DR;
-}
-
-/*******************************************************************************
-* Function Name : I2C_Send7bitAddress
-* Description : Transmits the address byte to select the slave device.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - Address: specifies the slave address which will be transmitted
-* - I2C_Direction: specifies whether the I2C device will be a
-* Transmitter or a Receiver.
-* This parameter can be one of the following values
-* - I2C_Direction_Transmitter: Transmitter mode
-* - I2C_Direction_Receiver: Receiver mode
-* Output : None
-* Return : None.
-*******************************************************************************/
-void I2C_Send7bitAddress(I2C_TypeDef* I2Cx, u8 Address, u8 I2C_Direction)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_DIRECTION(I2C_Direction));
-
- /* Test on the direction to set/reset the read/write bit */
- if (I2C_Direction != I2C_Direction_Transmitter)
- {
- /* Set the address bit0 for read */
- Address |= OAR1_ADD0_Set;
- }
- else
- {
- /* Reset the address bit0 for write */
- Address &= OAR1_ADD0_Reset;
- }
- /* Send the address */
- I2Cx->DR = Address;
-}
-
-/*******************************************************************************
-* Function Name : I2C_ReadRegister
-* Description : Reads the specified I2C register and returns its value.
-* Input1 : - I2C_Register: specifies the register to read.
-* This parameter can be one of the following values:
-* - I2C_Register_CR1: CR1 register.
-* - I2C_Register_CR2: CR2 register.
-* - I2C_Register_OAR1: OAR1 register.
-* - I2C_Register_OAR2: OAR2 register.
-* - I2C_Register_DR: DR register.
-* - I2C_Register_SR1: SR1 register.
-* - I2C_Register_SR2: SR2 register.
-* - I2C_Register_CCR: CCR register.
-* - I2C_Register_TRISE: TRISE register.
-* Output : None
-* Return : The value of the read register.
-*******************************************************************************/
-u16 I2C_ReadRegister(I2C_TypeDef* I2Cx, u8 I2C_Register)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_REGISTER(I2C_Register));
-
- /* Return the selected register value */
- return (*(vu16 *)(*((vu32 *)&I2Cx) + I2C_Register));
-}
-
-/*******************************************************************************
-* Function Name : I2C_SoftwareResetCmd
-* Description : Enables or disables the specified I2C software reset.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2C software reset.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_SoftwareResetCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Peripheral under reset */
- I2Cx->CR1 |= CR1_SWRST_Set;
- }
- else
- {
- /* Peripheral not under reset */
- I2Cx->CR1 &= CR1_SWRST_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_SMBusAlertConfig
-* Description : Drives the SMBusAlert pin high or low for the specified I2C.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - I2C_SMBusAlert: specifies SMBAlert pin level.
-* This parameter can be one of the following values:
-* - I2C_SMBusAlert_Low: SMBAlert pin driven low
-* - I2C_SMBusAlert_High: SMBAlert pin driven high
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_SMBusAlertConfig(I2C_TypeDef* I2Cx, u16 I2C_SMBusAlert)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_SMBUS_ALERT(I2C_SMBusAlert));
-
- if (I2C_SMBusAlert == I2C_SMBusAlert_Low)
- {
- /* Drive the SMBusAlert pin Low */
- I2Cx->CR1 |= I2C_SMBusAlert_Low;
- }
- else
- {
- /* Drive the SMBusAlert pin High */
- I2Cx->CR1 &= I2C_SMBusAlert_High;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_TransmitPEC
-* Description : Enables or disables the specified I2C PEC transfer.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2C PEC transmission.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_TransmitPEC(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the selected I2C PEC transmission */
- I2Cx->CR1 |= CR1_PEC_Set;
- }
- else
- {
- /* Disable the selected I2C PEC transmission */
- I2Cx->CR1 &= CR1_PEC_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_PECPositionConfig
-* Description : Selects the specified I2C PEC position.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - I2C_PECPosition: specifies the PEC position.
-* This parameter can be one of the following values:
-* - I2C_PECPosition_Next: indicates that the next
-* byte is PEC
-* - I2C_PECPosition_Current: indicates that current
-* byte is PEC
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_PECPositionConfig(I2C_TypeDef* I2Cx, u16 I2C_PECPosition)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_PEC_POSITION(I2C_PECPosition));
-
- if (I2C_PECPosition == I2C_PECPosition_Next)
- {
- /* Next byte in shift register is PEC */
- I2Cx->CR1 |= I2C_PECPosition_Next;
- }
- else
- {
- /* Current byte in shift register is PEC */
- I2Cx->CR1 &= I2C_PECPosition_Current;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_CalculatePEC
-* Description : Enables or disables the PEC value calculation of the
-* transfered bytes.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2Cx PEC value calculation.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_CalculatePEC(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the selected I2C PEC calculation */
- I2Cx->CR1 |= CR1_ENPEC_Set;
- }
- else
- {
- /* Disable the selected I2C PEC calculation */
- I2Cx->CR1 &= CR1_ENPEC_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_GetPEC
-* Description : Returns the PEC value for the specified I2C.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* Output : None
-* Return : The PEC value.
-*******************************************************************************/
-u8 I2C_GetPEC(I2C_TypeDef* I2Cx)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
-
- /* Return the selected I2C PEC value */
- return ((I2Cx->SR2) >> 8);
-}
-
-/*******************************************************************************
-* Function Name : I2C_ARPCmd
-* Description : Enables or disables the specified I2C ARP.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2Cx ARP.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_ARPCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the selected I2C ARP */
- I2Cx->CR1 |= CR1_ENARP_Set;
- }
- else
- {
- /* Disable the selected I2C ARP */
- I2Cx->CR1 &= CR1_ENARP_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_StretchClockCmd
-* Description : Enables or disables the specified I2C Clock stretching.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - NewState: new state of the I2Cx Clock stretching.
-* This parameter can be: ENABLE or DISABLE.
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_StretchClockCmd(I2C_TypeDef* I2Cx, FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState == DISABLE)
- {
- /* Enable the selected I2C Clock stretching */
- I2Cx->CR1 |= CR1_NOSTRETCH_Set;
- }
- else
- {
- /* Disable the selected I2C Clock stretching */
- I2Cx->CR1 &= CR1_NOSTRETCH_Reset;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_FastModeDutyCycleConfig
-* Description : Selects the specified I2C fast mode duty cycle.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - I2C_DutyCycle: specifies the fast mode duty cycle.
-* This parameter can be one of the following values:
-* - I2C_DutyCycle_2: I2C fast mode Tlow/Thigh = 2
-* - I2C_DutyCycle_16_9: I2C fast mode Tlow/Thigh = 16/9
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_FastModeDutyCycleConfig(I2C_TypeDef* I2Cx, u16 I2C_DutyCycle)
-{
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_DUTY_CYCLE(I2C_DutyCycle));
-
- if (I2C_DutyCycle != I2C_DutyCycle_16_9)
- {
- /* I2C fast mode Tlow/Thigh=2 */
- I2Cx->CCR &= I2C_DutyCycle_2;
- }
- else
- {
- /* I2C fast mode Tlow/Thigh=16/9 */
- I2Cx->CCR |= I2C_DutyCycle_16_9;
- }
-}
-
-/*******************************************************************************
-* Function Name : I2C_GetLastEvent
-* Description : Returns the last I2Cx Event.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* Output : None
-* Return : The last event
-*******************************************************************************/
-u32 I2C_GetLastEvent(I2C_TypeDef* I2Cx)
-{
- u32 lastevent = 0;
- u32 flag1 = 0, flag2 = 0;
-
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
-
- /* Read the I2Cx status register */
- flag1 = I2Cx->SR1;
- flag2 = I2Cx->SR2;
- flag2 = flag2 << 16;
-
- /* Get the last event value from I2C status register */
- lastevent = (flag1 | flag2) & FLAG_Mask;
-
- /* Return status */
- return lastevent;
-}
-
-/*******************************************************************************
-* Function Name : I2C_CheckEvent
-* Description : Checks whether the last I2Cx Event is equal to the one passed
-* as parameter.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - I2C_EVENT: specifies the event to be checked.
-* This parameter can be one of the following values:
-* - I2C_EVENT_SLAVE_ADDRESS_MATCHED : EV1
-* - I2C_EVENT_SLAVE_BYTE_RECEIVED : EV2
-* - I2C_EVENT_SLAVE_BYTE_TRANSMITTED : EV3
-* - I2C_EVENT_SLAVE_ACK_FAILURE : EV3-2
-* - I2C_EVENT_MASTER_MODE_SELECT : EV5
-* - I2C_EVENT_MASTER_MODE_SELECTED : EV6
-* - I2C_EVENT_MASTER_BYTE_RECEIVED : EV7
-* - I2C_EVENT_MASTER_BYTE_TRANSMITTED : EV8
-* - I2C_EVENT_MASTER_MODE_ADDRESS10 : EV9
-* - I2C_EVENT_SLAVE_STOP_DETECTED : EV4
-* Output : None
-* Return : An ErrorStatus enumuration value:
-* - SUCCESS: Last event is equal to the I2C_EVENT
-* - ERROR: Last event is different from the I2C_EVENT
-*******************************************************************************/
-ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, u32 I2C_EVENT)
-{
- u32 lastevent = 0;
- u32 flag1 = 0, flag2 = 0;
- ErrorStatus status = ERROR;
-
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_EVENT(I2C_EVENT));
-
- /* Read the I2Cx status register */
- flag1 = I2Cx->SR1;
- flag2 = I2Cx->SR2;
- flag2 = flag2 << 16;
-
- /* Get the last event value from I2C status register */
- lastevent = (flag1 | flag2) & FLAG_Mask;
-
- /* Check whether the last event is equal to I2C_EVENT */
- if (lastevent == I2C_EVENT )
- {
- /* SUCCESS: last event is equal to I2C_EVENT */
- status = SUCCESS;
- }
- else
- {
- /* ERROR: last event is different from I2C_EVENT */
- status = ERROR;
- }
-
- /* Return status */
- return status;
-}
-
-/*******************************************************************************
-* Function Name : I2C_GetFlagStatus
-* Description : Checks whether the specified I2C flag is set or not.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - I2C_FLAG: specifies the flag to check.
-* This parameter can be one of the following values:
-* - I2C_FLAG_DUALF: Dual flag (Slave mode)
-* - I2C_FLAG_SMBHOST: SMBus host header (Slave mode)
-* - I2C_FLAG_SMBDEFAULT: SMBus default header (Slave mode)
-* - I2C_FLAG_GENCALL: General call header flag (Slave mode)
-* - I2C_FLAG_TRA: Transmitter/Receiver flag
-* - I2C_FLAG_BUSY: Bus busy flag
-* - I2C_FLAG_MSL: Master/Slave flag
-* - I2C_FLAG_SMBALERT: SMBus Alert flag
-* - I2C_FLAG_TIMEOUT: Timeout or Tlow error flag
-* - I2C_FLAG_PECERR: PEC error in reception flag
-* - I2C_FLAG_OVR: Overrun/Underrun flag (Slave mode)
-* - I2C_FLAG_AF: Acknowledge failure flag
-* - I2C_FLAG_ARLO: Arbitration lost flag (Master mode)
-* - I2C_FLAG_BERR: Bus error flag
-* - I2C_FLAG_TXE: Data register empty flag (Transmitter)
-* - I2C_FLAG_RXNE: Data register not empty (Receiver) flag
-* - I2C_FLAG_STOPF: Stop detection flag (Slave mode)
-* - I2C_FLAG_ADD10: 10-bit header sent flag (Master mode)
-* - I2C_FLAG_BTF: Byte transfer finished flag
-* - I2C_FLAG_ADDR: Address sent flag (Master mode) “ADSL”
-* Address matched flag (Slave mode)”ENDAD”
-* - I2C_FLAG_SB: Start bit flag (Master mode)
-* Output : None
-* Return : The new state of I2C_FLAG (SET or RESET).
-*******************************************************************************/
-FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, u32 I2C_FLAG)
-{
- FlagStatus bitstatus = RESET;
- u32 i2creg = 0, i2cxbase = 0;
-
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_GET_FLAG(I2C_FLAG));
-
- /* Get the I2Cx peripheral base address */
- i2cxbase = (*(u32*)&(I2Cx));
-
- /* Read flag register index */
- i2creg = I2C_FLAG >> 28;
-
- /* Get bit[23:0] of the flag */
- I2C_FLAG &= FLAG_Mask;
-
- if(i2creg != 0)
- {
- /* Get the I2Cx SR1 register address */
- i2cxbase += 0x14;
- }
- else
- {
- /* Flag in I2Cx SR2 Register */
- I2C_FLAG = (u32)(I2C_FLAG >> 16);
- /* Get the I2Cx SR2 register address */
- i2cxbase += 0x18;
- }
-
- if(((*(vu32 *)i2cxbase) & I2C_FLAG) != (u32)RESET)
- {
- /* I2C_FLAG is set */
- bitstatus = SET;
- }
- else
- {
- /* I2C_FLAG is reset */
- bitstatus = RESET;
- }
-
- /* Return the I2C_FLAG status */
- return bitstatus;
-}
-
-/*******************************************************************************
-* Function Name : I2C_ClearFlag
-* Description : Clears the I2Cx's pending flags.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - I2C_FLAG: specifies the flag to clear.
-* This parameter can be any combination of the following
-* values:
-* - I2C_FLAG_SMBALERT: SMBus Alert flag
-* - I2C_FLAG_TIMEOUT: Timeout or Tlow error flag
-* - I2C_FLAG_PECERR: PEC error in reception flag
-* - I2C_FLAG_OVR: Overrun/Underrun flag (Slave mode)
-* - I2C_FLAG_AF: Acknowledge failure flag
-* - I2C_FLAG_ARLO: Arbitration lost flag (Master mode)
-* - I2C_FLAG_BERR: Bus error flag
-*
-* Notes:
-* - STOPF (STOP detection) is cleared by software
-* sequence: a read operation to I2C_SR1 register
-* (I2C_GetFlagStatus()) followed by a write operation
-* to I2C_CR1 register (I2C_Cmd() to re-enable the
-* I2C peripheral).
-* - ADD10 (10-bit header sent) is cleared by software
-* sequence: a read operation to I2C_SR1
-* (I2C_GetFlagStatus()) followed by writing the
-* second byte of the address in DR register.
-* - BTF (Byte Transfer Finished) is cleared by software
-* sequence: a read operation to I2C_SR1 register
-* (I2C_GetFlagStatus()) followed by a read/write to
-* I2C_DR register (I2C_SendData()).
-* - ADDR (Address sent) is cleared by software sequence:
-* a read operation to I2C_SR1 register
-* (I2C_GetFlagStatus()) followed by a read operation to
-* I2C_SR2 register ((void)(I2Cx->SR2)).
-* - SB (Start Bit) is cleared software sequence: a read
-* operation to I2C_SR1 register (I2C_GetFlagStatus())
-* followed by a write operation to I2C_DR reigister
-* (I2C_SendData()).
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_ClearFlag(I2C_TypeDef* I2Cx, u32 I2C_FLAG)
-{
- u32 flagpos = 0;
-
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_CLEAR_FLAG(I2C_FLAG));
-
- /* Get the I2C flag position */
- flagpos = I2C_FLAG & FLAG_Mask;
-
- /* Clear the selected I2C flag */
- I2Cx->SR1 = (u16)~flagpos;
-}
-
-/*******************************************************************************
-* Function Name : I2C_GetITStatus
-* Description : Checks whether the specified I2C interrupt has occurred or not.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - I2C_IT: specifies the interrupt source to check.
-* This parameter can be one of the following values:
-* - I2C_IT_SMBALERT: SMBus Alert flag
-* - I2C_IT_TIMEOUT: Timeout or Tlow error flag
-* - I2C_IT_PECERR: PEC error in reception flag
-* - I2C_IT_OVR: Overrun/Underrun flag (Slave mode)
-* - I2C_IT_AF: Acknowledge failure flag
-* - I2C_IT_ARLO: Arbitration lost flag (Master mode)
-* - I2C_IT_BERR: Bus error flag
-* - I2C_IT_TXE: Data register empty flag (Transmitter)
-* - I2C_IT_RXNE: Data register not empty (Receiver) flag
-* - I2C_IT_STOPF: Stop detection flag (Slave mode)
-* - I2C_IT_ADD10: 10-bit header sent flag (Master mode)
-* - I2C_IT_BTF: Byte transfer finished flag
-* - I2C_IT_ADDR: Address sent flag (Master mode) “ADSL”
-* Address matched flag (Slave mode)”ENDAD”
-* - I2C_IT_SB: Start bit flag (Master mode)
-* Output : None
-* Return : The new state of I2C_IT (SET or RESET).
-*******************************************************************************/
-ITStatus I2C_GetITStatus(I2C_TypeDef* I2Cx, u32 I2C_IT)
-{
- ITStatus bitstatus = RESET;
- u32 enablestatus = 0;
-
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_GET_IT(I2C_IT));
-
- /* Check if the interrupt source is enabled or not */
- enablestatus = (u32)(((I2C_IT & ITEN_Mask) >> 16) & (I2Cx->CR2)) ;
-
- /* Get bit[23:0] of the flag */
- I2C_IT &= FLAG_Mask;
-
- /* Check the status of the specified I2C flag */
- if (((I2Cx->SR1 & I2C_IT) != (u32)RESET) && enablestatus)
- {
- /* I2C_IT is set */
- bitstatus = SET;
- }
- else
- {
- /* I2C_IT is reset */
- bitstatus = RESET;
- }
- /* Return the I2C_IT status */
- return bitstatus;
-}
-
-/*******************************************************************************
-* Function Name : I2C_ClearITPendingBit
-* Description : Clears the I2Cx’s interrupt pending bits.
-* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
-* - I2C_IT: specifies the interrupt pending bit to clear.
-* This parameter can be any combination of the following
-* values:
-* - I2C_IT_SMBALERT: SMBus Alert interrupt
-* - I2C_IT_TIMEOUT: Timeout or Tlow error interrupt
-* - I2C_IT_PECERR: PEC error in reception interrupt
-* - I2C_IT_OVR: Overrun/Underrun interrupt (Slave mode)
-* - I2C_IT_AF: Acknowledge failure interrupt
-* - I2C_IT_ARLO: Arbitration lost interrupt (Master mode)
-* - I2C_IT_BERR: Bus error interrupt
-*
-* Notes:
-* - STOPF (STOP detection) is cleared by software
-* sequence: a read operation to I2C_SR1 register
-* (I2C_GetITStatus()) followed by a write operation to
-* I2C_CR1 register (I2C_Cmd() to re-enable the I2C
-* peripheral).
-* - ADD10 (10-bit header sent) is cleared by software
-* sequence: a read operation to I2C_SR1
-* (I2C_GetITStatus()) followed by writing the second
-* byte of the address in I2C_DR register.
-* - BTF (Byte Transfer Finished) is cleared by software
-* sequence: a read operation to I2C_SR1 register
-* (I2C_GetITStatus()) followed by a read/write to
-* I2C_DR register (I2C_SendData()).
-* - ADDR (Address sent) is cleared by software sequence:
-* a read operation to I2C_SR1 register (I2C_GetITStatus())
-* followed by a read operation to I2C_SR2 register
-* ((void)(I2Cx->SR2)).
-* - SB (Start Bit) is cleared by software sequence: a
-* read operation to I2C_SR1 register (I2C_GetITStatus())
-* followed by a write operation to I2C_DR reigister
-* (I2C_SendData()).
-* Output : None
-* Return : None
-*******************************************************************************/
-void I2C_ClearITPendingBit(I2C_TypeDef* I2Cx, u32 I2C_IT)
-{
- u32 flagpos = 0;
-
- /* Check the parameters */
- assert_param(IS_I2C_ALL_PERIPH(I2Cx));
- assert_param(IS_I2C_CLEAR_IT(I2C_IT));
-
- /* Get the I2C flag position */
- flagpos = I2C_IT & FLAG_Mask;
-
- /* Clear the selected I2C flag */
- I2Cx->SR1 = (u16)~flagpos;
-}
-
-/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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