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rt-thread-official/bsp/mm32l07x/Libraries/MM32L0xx/HAL_lib/src/HAL_i2c.c

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/**
******************************************************************************
* @file HAL_i2c.c
* @author AE Team
* @version V2.0.0
* @date 22/08/2017
* @brief This file provides all the I2C firmware functions.
******************************************************************************
* @copy
*
* 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, MindMotion 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.
*
* <h2><center>&copy; COPYRIGHT 2017 MindMotion</center></h2>
*/
/* Includes ------------------------------------------------------------------*/
#include "HAL_i2c.h"
#include "HAL_rcc.h"
/** @addtogroup StdPeriph_Driver
* @{
*/
/** @defgroup I2C
* @brief I2C driver modules
* @{
*/
/** @defgroup I2C_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @defgroup I2C_Private_Defines
* @{
*/
/*I2c Enable disable*/
#define IC_ENABLE_Reset ((uint16_t)0xFFFE)
#define IC_ENABLE_Set ((uint16_t)0x0001)
#define IC_CON_RESET ((uint16_t)0xFE8A)
#define INTR_MASK ((uint16_t)0xC000)
/*I2c DMA reset*/
#define DMA_CR_TDMAE_RDMAE_Reset ((uint16_t)0xFFFC)
/* I2C START mask */
#define IC_CON_START_Set ((uint16_t)0x0020)
#define IC_CON_START_Reset ((uint16_t)0xFFDF)
/* I2C STOP mask */
#define IC_DATA_CMD_STOP_Set ((uint16_t)0x0200)
#define IC_DATA_CMD_STOP_Reset ((uint16_t)0xFDFF)
/* I2C ADD2 mask */
#define IC_TAR_Reset ((uint16_t)0xFF00)
/* I2C IC_10BITADDR_MASTER bit mask */
#define IC_TAR_ENDUAL_Set ((uint16_t)0x1000)
#define IC_TAR_ENDUAL_Reset ((uint16_t)0xEFFF)
/* I2C SPECIAL¡¢GC_OR_START bits mask */
#define IC_TAR_GC_Set ((uint16_t)0x0800)
#define IC_TAR_GC_Reset ((uint16_t)0xF7FF)
/* I2C FLAG mask */
#define FLAG_Mask ((uint32_t)0x00793FFF)
static uint8_t I2C_CMD_DIR = 0;
/*ÐÂÔö¼ÓµÄÓû§±äÁ¿£¬Íⲿµ÷ÓÃʱÐèÒª¸üиñäÁ¿Öµ*/
uint16_t I2C_DMA_DIR = 0;
/**
* @}
*/
/** @defgroup I2C_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup I2C_Private_Variables
* @{
*/
/**
* @}
*/
/** @defgroup I2C_Private_FunctionPrototypes
* @{
*/
/**
* @}
*/
/** @defgroup I2C_Private_Functions
* @{
*/
/**
* @brief Deinitializes the I2Cx peripheral registers to their default
* reset values.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @retval : None
*/
void I2C_DeInit(I2C_TypeDef* I2Cx)
{
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
switch (*(uint32_t*)&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;
default:
break;
}
}
/**
* @brief Initializes the I2Cx peripheral according to the specified
* parameters in the I2C_InitStruct.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_InitStruct: pointer to a I2C_InitTypeDef structure that
* contains the configuration information for the specified
* I2C peripheral.
* @retval : None
*/
void I2C_Init(I2C_TypeDef* I2Cx, I2C_InitTypeDef* I2C_InitStruct)
{
uint16_t tmpreg = 0;
uint32_t pclk1 = 8000000;
//uint32_t minSclLowTime = 0;
uint32_t i2cPeriod = 0;
uint32_t pclk1Period = 0;
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_CLOCK_SPEED(I2C_InitStruct->I2C_ClockSpeed));
/*---------------------------- I2Cx IC_ENABLE Configuration ------------------------*/
/* Disable the selected I2C peripheral */
I2Cx->IC_ENABLE &= IC_ENABLE_Reset;
/* Get pclk1 frequency value */
RCC_GetClocksFreq(&rcc_clocks);
pclk1 = rcc_clocks.PCLK1_Frequency;
/* Set pclk1 period value */
pclk1Period = 1000000000/pclk1;
i2cPeriod = 1000000000/I2C_InitStruct->I2C_ClockSpeed; //ns unit
tmpreg = 0;
/* Configure speed in standard mode */
if (I2C_InitStruct->I2C_ClockSpeed <= 100000)
{
tmpreg = (i2cPeriod/pclk1Period)/2;
I2Cx->IC_SS_SCL_LCNT = tmpreg;
tmpreg = (i2cPeriod - pclk1Period*I2Cx->IC_SS_SCL_LCNT)/pclk1Period;
/* Write to I2Cx IC_SS_SCL_HCNT */
I2Cx->IC_SS_SCL_HCNT = tmpreg;
}
else /*(I2C_InitStruct->I2C_ClockSpeed <= 400000)*/
{
tmpreg = (i2cPeriod/pclk1Period)/2;
I2Cx->IC_FS_SCL_LCNT = tmpreg;
tmpreg = (i2cPeriod - pclk1Period*I2Cx->IC_FS_SCL_LCNT)/pclk1Period;
/* Write to I2Cx IC_FS_SCL_HCNT */
I2Cx->IC_FS_SCL_HCNT = tmpreg;
}
/*Get the I2Cx IC_CON value */
tmpreg = I2Cx->IC_CON;
/*Clear TX_EMPTY_CTRL,IC_SLAVE_DISABLE,IC_RESTART_EN,IC_10BITADDR_SLAVE,SPEED,MASTER_MODE bits*/
tmpreg &= IC_CON_RESET;
/*Set TX_EMPTY_CTRL,IC_SLAVE_DISABLE,IC_RESTART_EN,IC_10BITADDR_SLAVE,SPEED,MASTER_MODE bits*/
tmpreg = TX_EMPTY_CTRL | IC_SLAVE_DISABLE | IC_RESTART_EN |IC_7BITADDR_MASTER | I2C_InitStruct->I2C_Speed | I2C_InitStruct->I2C_Mode;
/* Write to I2Cx IC_CON */
I2Cx->IC_CON = tmpreg;
/*---------------------------- I2Cx IC_INTR_MASK Configuration ------------------------*/
/* Get the I2Cx IC_INTR_MASK value */
tmpreg = I2Cx->IC_INTR_MASK;
/* clear the I2Cx IC_INTR_MASK value */
tmpreg &= INTR_MASK;
/* Write to IC_INTR_MASK */
I2Cx->IC_INTR_MASK = tmpreg;
/* Write to IC_RX_TL */
I2Cx->IC_RX_TL = 0x0; //rxfifo depth is 1
/* Write to IC_TX_TL */
I2Cx->IC_TX_TL = 0x1; //tcfifo depth is 1
}
/**
* @brief Fills each I2C_InitStruct member with its default value.
* @param I2C_InitStruct: pointer to an I2C_InitTypeDef structure
* which will be initialized.
* @retval : 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_MASTER;
/* Initialize the I2C_OwnAddress member */
I2C_InitStruct->I2C_OwnAddress = 0xA8;
/* Initialize the I2C_Speed member */
I2C_InitStruct->I2C_Speed = I2C_Speed_STANDARD;
/* initialize the I2C_ClockSpeed member */
I2C_InitStruct->I2C_ClockSpeed = 100000;
}
/**
* @brief Enables or disables the specified I2C peripheral.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param NewState: new state of the I2Cx peripheral. This parameter
* can be: ENABLE or DISABLE.
* @retval : 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->IC_ENABLE |= IC_ENABLE_Set;
}
else
{
/* Disable the selected I2C peripheral */
I2Cx->IC_ENABLE &= IC_ENABLE_Reset;
}
}
/**
* @brief Enables or disables the specified I2C DMA requests.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param DMA_Direcction : TDMAE_SET,RDMAE_SET
* This parameter can be any combination of the following values:
* @arg TDMAE_SET :DMA TX set
* @arg RDMAE_SET :DMA RX set
* @param NewState: new state of the I2C DMA transfer.
* This parameter can be: ENABLE or DISABLE.
* @retval : 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 */
if(I2C_DMA_DIR==TDMAE_SET)
{
/* Enable the selected I2C TX DMA requests */
I2Cx->IC_DMA_CR |= TDMAE_SET;
}
else if(I2C_DMA_DIR==RDMAE_SET)
{
/* Enable the selected I2C TX DMA requests */
I2Cx->IC_DMA_CR |= RDMAE_SET;
}
}
else
{
/* Disable the selected I2C DMA requests */
I2Cx->IC_DMA_CR &= DMA_CR_TDMAE_RDMAE_Reset;
}
}
/**
* @brief Generates I2Cx communication START condition.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param NewState: new state of the I2C START condition generation.
* This parameter can be: ENABLE or DISABLE.
* @retval : 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->IC_CON |= IC_CON_START_Set;
}
else
{
/* Disable the START condition generation */
I2Cx->IC_CON &= IC_CON_START_Reset;
}
}
/**
* @brief Generates I2Cx communication STOP condition.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param NewState: new state of the I2C STOP condition generation.
* This parameter can be: ENABLE or DISABLE.
* @retval : None.
*/
void I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState)
{
u8 tempReg=0;
tempReg=tempReg;
I2Cx->IC_ENABLE |= 0x02;
while(I2Cx->IC_ENABLE&0x02);
tempReg = I2Cx->IC_CLR_TX_ABRT;
}
/**
* @brief Configures the specified I2C own address2.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param Address: specifies the 7bit I2C own address2.
* @retval : None.
*/
void I2C_OwnAddress2Config(I2C_TypeDef* I2Cx, uint8_t Address)
//void I2C_OwnAddress2Config(I2C_TypeDef* I2Cx, uint16_t Address)
{
uint16_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
/* Get the old register value */
tmpreg = I2Cx->IC_TAR;
/* Reset I2Cx Own address2 bit [7:0] */
tmpreg &= IC_TAR_Reset;
/* Set I2Cx Own address2 */
tmpreg |= Address>>1;
/* Store the new register value */
I2Cx->IC_TAR = tmpreg;
}
/**
* @brief Enables or disables the specified I2C dual addressing mode.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param NewState: new state of the I2C dual addressing mode.
* This parameter can be: ENABLE or DISABLE.
* @retval : 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->IC_TAR |= IC_TAR_ENDUAL_Set;
}
else
{
/* Disable dual addressing mode */
I2Cx->IC_TAR &= IC_TAR_ENDUAL_Reset;
}
}
/**
* @brief Enables or disables the specified I2C general call feature.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param NewState: new state of the I2C General call.
* This parameter can be: ENABLE or DISABLE.
* @retval : 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->IC_TAR |= IC_TAR_GC_Set;
}
else
{
/* Disable generall call */
I2Cx->IC_TAR &= IC_TAR_GC_Reset;
}
}
/**
* @brief Enables or disables the specified I2C interrupts.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_IT: specifies the I2C interrupts sources to be enabled
* or disabled.
* This parameter can be any combination of the following values:
* @arg I2C_IT_RX_UNDER: Rx Buffer is empty interrupt mask
* @arg I2C_IT_RX_OVER : RX Buffer Overrun interrupt mask
* @arg I2C_IT_RX_FULL : Rx buffer full interrupt mask
* @arg I2C_IT_TX_OVER : TX Buffer Overrun interrupt mask
* @arg I2C_IT_TX_EMPTY : TX_FIFO empty interrupt mask
* @arg I2C_IT_RD_REQ : I2C work as slave or master interrupt mask
* @arg I2C_IT_TX_ABRT : TX error interrupt mask(Master mode)
* @arg I2C_IT_RX_DONE : Master not ack interrupt mask(slave mode)
* @arg I2C_IT_ACTIVITY : I2C activity interrupt mask
* @arg I2C_IT_STOP_DET : stop condition interrupt mask
* @arg I2C_IT_START_DET : start condition interrupt mask
* @arg I2C_IT_GEN_CALL : a general call address and ack interrupt mask
* @param NewState: new state of the specified I2C interrupts.
* This parameter can be: ENABLE or DISABLE.
* @retval : None
*/
void I2C_ITConfig(I2C_TypeDef* I2Cx, uint16_t 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(I2C_IT == I2C_IT_RX_FULL)
{
I2Cx->IC_DATA_CMD = CMD_READ;
}
if (NewState != DISABLE)
{
/* Enable the selected I2C interrupts */
I2Cx->IC_INTR_MASK |= I2C_IT;
}
else
{
/* Disable the selected I2C interrupts */
I2Cx->IC_INTR_MASK &= (uint16_t)~I2C_IT;
}
}
/**
* @brief Sends a data byte through the I2Cx peripheral.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param Data: Byte to be transmitted..
* @retval : None
*/
void I2C_SendData(I2C_TypeDef* I2Cx, uint8_t Data)
{
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
/* Write in the IC_DATA_CMD register the data to be sent */
I2Cx->IC_DATA_CMD = CMD_WRITE | Data;
}
/**
* @brief Sends last data byte through the I2Cx peripheral.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param Data: Byte to be transmitted..
* @retval : None
*/
void I2C_SendLastDataOrStop(I2C_TypeDef* I2Cx, uint8_t Data)
{
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
/* Write in the IC_DATA_CMD register the data to be sent */
I2Cx->IC_DATA_CMD = 0x200 | Data;
}
/**
* @brief Read last data byte through the I2Cx peripheral.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param Data: Byte to be Recieved..
* @retval : None
*/
uint8_t I2C_ReadLastDataOrStop(I2C_TypeDef* I2Cx)
{
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
/* Write in the IC_DATA_CMD register the data to be sent */
I2Cx->IC_DATA_CMD = 0x300 ;
return 0;
}
/**
* @brief Returns the most recent received data by the I2Cx peripheral.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @retval : The value of the received data.
*/
void I2C_ReadCmd(I2C_TypeDef* I2Cx)
{
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
I2Cx->IC_DATA_CMD = CMD_READ;
}
/**
* @brief Returns the most recent received data by the I2Cx peripheral.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @retval : The value of the received data.
*/
uint8_t I2C_ReceiveData(I2C_TypeDef* I2Cx)
{
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
I2C_CMD_DIR= 0;
/* Return the data in the IC_DATA_CMD register */
return (uint8_t)I2Cx->IC_DATA_CMD;
}
/**
* @brief Transmits the address byte to select the slave device.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param Address: specifies the slave address which will be transmitted
* @param I2C_Direction: specifies whether the I2C device will be a
* Transmitter or a Receiver.
* This parameter can be one of the following values
* @arg I2C_Direction_Transmitter: Transmitter mode
* @arg I2C_Direction_Receiver: Receiver mode
* @retval : None.
*/
void I2C_Send7bitAddress(I2C_TypeDef* I2Cx, uint8_t Address, uint8_t I2C_Direction)
{
/* Store the new register value */
I2Cx->IC_TAR = Address>>1;
}
/**
* @brief Reads the specified I2C register and returns its value.
* @param I2C_Register: specifies the register to read.
* This parameter can be one of the following values:
* @retval : The value of the read register.
*/
uint16_t I2C_ReadRegister(I2C_TypeDef* I2Cx, uint8_t 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 (*(__IO uint16_t *)(*((__IO uint32_t *)&I2Cx) + I2C_Register));
}
/**
* @brief Returns the last I2Cx Event.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @retval : The last event
*/
uint32_t I2C_GetLastEvent(I2C_TypeDef* I2Cx)
{
uint32_t lastevent = 0;
uint32_t flag1 = 0;
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
/* Read the I2Cx status register */
flag1 = I2Cx->IC_RAW_INTR_STAT;
/* Get the last event value from I2C status register */
lastevent = (flag1 ) & FLAG_Mask;
/* Return status */
return lastevent;
}
/**
* @brief Checks whether the last I2Cx Event is equal to the one passed
* as parameter.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_EVENT: specifies the event to be checked.
* This parameter can be one of the following values:
* @arg I2C_EVENT_RX_UNDER: Rx Buffer is empty event
* @arg I2C_EVENT_RX_OVER : RX Buffer Overrun event
* @arg I2C_EVENTT_RX_FULL : Rx buffer full event
* @arg I2C_EVENT_TX_OVER : TX Buffer Overrun event
* @arg I2C_EVENT_TX_EMPTY : TX_FIFO empty event
* @arg I2C_EVENT_RD_REQ : I2C work as slave or master event
* @arg I2C_EVENT_TX_ABRT : TX error event(Master mode)
* @arg I2C_EVENT_RX_DONE : Master not ack event(slave mode)
* @arg I2C_EVENT_ACTIVITY : I2C activity event
* @arg I2C_EVENT_STOP_DET : stop condition event
* @arg I2C_EVENT_START_DET : start condition event
* @arg I2C_EVENT_GEN_CALL : a general call address and ack event
* - SUCCESS: Last event is equal to the I2C_EVENT
* - ERROR: Last event is different from the I2C_EVENT
*/
ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, uint32_t I2C_EVENT)
{
uint32_t lastevent = 0;
uint32_t flag1 = 0;
ErrorStatus status = ERROR;
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
assert_param(IS_I2C_EVENT(I2C_EVENT));
if((I2C_EVENT == I2C_EVENT_RX_FULL)&&(I2C_CMD_DIR==0))
{
I2Cx->IC_DATA_CMD = CMD_READ;
I2C_CMD_DIR = 1;
}
/* Read the I2Cx status register */
flag1 = I2Cx->IC_RAW_INTR_STAT;
//flag1 = I2Cx->IC_INTR_STAT;
/* Get the last event value from I2C status register */
lastevent = (flag1 ) & I2C_EVENT;
/* Check whether the last event is equal to I2C_EVENT */
if (lastevent == I2C_EVENT )
//if((I2Cx->IC_RAW_INTR_STAT & I2C_EVENT) != (uint32_t)RESET)
{
/* 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;
}
/**
* @brief Checks whether the specified I2C flag is set or not.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_FLAG: specifies the flag to check.
* This parameter can be one of the following values:
* @arg I2C_FLAG_RX_UNDER: Rx Buffer is empty flag
* @arg I2C_FLAG_RX_OVER : RX Buffer Overrun flag
* @arg I2C_FLAG_RX_FULL : Rx buffer full flag
* @arg I2C_FLAG_TX_OVER : TX Buffer Overrun flag
* @arg I2C_FLAG_TX_EMPTY: TX_FIFO empty flag
* @arg I2C_FLAG_RD_REQ : I2C work as slave or master flag
* @arg I2C_FLAG_TX_ABRT : TX error flag(Master mode)
* @arg I2C_FLAG_RX_DONE : Master not ack flag(slave mode)
* @arg I2C_FLAG_ACTIVITY: I2C activity flag
* @arg I2C_FLAG_STOP_DET: stop condition flag
* @arg I2C_FLAG_START_DET: start condition flag
* @arg I2C_FLAG_GEN_CALL : a general call address and ack flag
* @arg I2C_STATUS_FLAG_ACTIVITY
* @arg I2C_STATUS_FLAG_TFNF
* @arg I2C_STATUS_FLAG_TFE
* @arg I2C_STATUS_FLAG_RFNE
* @arg I2C_STATUS_FLAG_RFF
* @arg I2C_STATUS_FLAG_M_ACTIVITY
* @arg I2C_STATUS_FLAG_S_ACTIVITY
* @retval : The new state of I2C_FLAG (SET or RESET).
*/
FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG)
{
FlagStatus bitstatus = RESET;
__IO uint32_t i2creg = 0, i2cxbase = 0;
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
assert_param(IS_I2C_GET_FLAG(I2C_FLAG));
if(I2C_FLAG & 0x8000)
{
if((I2Cx->IC_STATUS & I2C_FLAG) != (uint32_t)RESET)
{
/* I2C_FLAG is set */
bitstatus = SET;
}
else
{
/* I2C_FLAG is reset */
bitstatus = RESET;
}
}
else
{
if((I2C_FLAG == I2C_FLAG_RX_FULL)&&(I2C_CMD_DIR==0))
{
I2Cx->IC_DATA_CMD = CMD_READ;
I2C_CMD_DIR = 1;
}
/* Check the status of the specified I2C flag */
if((I2Cx->IC_RAW_INTR_STAT & I2C_FLAG) != (uint32_t)RESET)
{
/* I2C_FLAG is set */
bitstatus = SET;
}
else
{
/* I2C_FLAG is reset */
bitstatus = RESET;
}
}
/* Return the I2C_FLAG status */
return bitstatus;
}
/**
* @brief Clears the I2Cx's pending flags.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_FLAG: specifies the flag to clear.
* This parameter can be any combination of the following values:
* @arg I2C_FLAG_RX_UNDER: Rx Buffer is empty flag
* @arg I2C_FLAG_RX_OVER : RX Buffer Overrun flag
* @arg I2C_FLAG_RX_FULL : Rx buffer full flag
* @arg I2C_FLAG_TX_OVER : TX Buffer Overrun flag
* @arg I2C_FLAG_TX_EMPTY: TX_FIFO empty flag
* @arg I2C_FLAG_RD_REQ : I2C work as slave or master flag
* @arg I2C_FLAG_TX_ABRT : TX error flag(Master mode)
* @arg I2C_FLAG_RX_DONE : Master not ack flag(slave mode)
* @arg I2C_FLAG_ACTIVITY: I2C activity flag
* @arg I2C_FLAG_STOP_DET: stop condition flag
* @arg I2C_FLAG_START_DET: start condition flag
* @arg I2C_FLAG_GEN_CALL : a general call address and ack flag
* @retval : None
*/
void I2C_ClearFlag(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG)
{
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
assert_param(IS_I2C_CLEAR_FLAG(I2C_FLAG));
if((I2C_FLAG & I2C_FLAG_RX_UNDER) == I2C_FLAG_RX_UNDER) {I2Cx->IC_CLR_RX_UNDER;}
if((I2C_FLAG & I2C_FLAG_RX_OVER) == I2C_FLAG_RX_OVER) {I2Cx->IC_CLR_RX_OVER;}
if((I2C_FLAG & I2C_FLAG_TX_OVER) == I2C_FLAG_TX_OVER) {I2Cx->IC_CLR_TX_OVER;}
if((I2C_FLAG & I2C_FLAG_RD_REQ) == I2C_FLAG_RD_REQ) {I2Cx->IC_CLR_RD_REQ;}
if((I2C_FLAG & I2C_FLAG_TX_ABRT) == I2C_FLAG_TX_ABRT) {I2Cx->IC_CLR_TX_ABRT;}
if((I2C_FLAG & I2C_FLAG_RX_DONE) == I2C_FLAG_RX_DONE) {I2Cx->IC_CLR_RX_DONE;}
if((I2C_FLAG & I2C_FLAG_ACTIVITY) == I2C_FLAG_ACTIVITY) {I2Cx->IC_CLR_ACTIVITY;}
if((I2C_FLAG & I2C_FLAG_STOP_DET) == I2C_FLAG_STOP_DET) {I2Cx->IC_CLR_STOP_DET;}
if((I2C_FLAG & I2C_FLAG_START_DET) == I2C_FLAG_START_DET){I2Cx->IC_CLR_START_DET;}
if((I2C_FLAG & I2C_FLAG_GEN_CALL) == I2C_FLAG_GEN_CALL) {I2Cx->IC_CLR_GEN_CALL;}
}
/**
* @brief Checks whether the specified I2C interrupt has occurred or not.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_IT: specifies the interrupt source to check.
* This parameter can be one of the following values:
* @arg I2C_IT_RX_UNDER: Rx Buffer is empty interrupt
* @arg I2C_IT_RX_OVER : RX Buffer Overrun interrupt
* @arg I2C_IT_RX_FULL : Rx buffer full interrupt
* @arg I2C_IT_TX_OVER : TX Buffer Overrun interrupt
* @arg I2C_IT_TX_EMPTY : TX_FIFO empty interrupt
* @arg I2C_IT_RD_REQ : I2C work as slave or master interrupt
* @arg I2C_IT_TX_ABRT : TX error interrupt (Master mode)
* @arg I2C_IT_RX_DONE : Master not ack interrupt (slave mode)
* @arg I2C_IT_ACTIVITY : I2C activity interrupt
* @arg I2C_IT_STOP_DET : stop condition interrupt
* @arg I2C_IT_START_DET : start condition interrupt
* @arg I2C_IT_GEN_CALL : a general call address and ack interrupt
* @retval : The new state of I2C_IT (SET or RESET).
*/
ITStatus I2C_GetITStatus(I2C_TypeDef* I2Cx, uint32_t I2C_IT)
{
ITStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
assert_param(IS_I2C_GET_IT(I2C_IT));
/* Check the status of the specified I2C flag */
if((I2Cx->IC_RAW_INTR_STAT & I2C_IT) != (uint32_t)RESET)
{
/* I2C_IT is set */
bitstatus = SET;
}
else
{
/* I2C_IT is reset */
bitstatus = RESET;
}
/* Return the I2C_IT status */
return bitstatus;
}
/**
* @brief Clears the I2Cx interrupt pending bits.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_IT: specifies the interrupt pending bit to clear.
* This parameter can be any combination of the following values:
* @arg I2C_IT_RX_UNDER: Rx Buffer is empty interrupt
* @arg I2C_IT_RX_OVER : RX Buffer Overrun interrupt
* @arg I2C_IT_RX_FULL : Rx buffer full interrupt
* @arg I2C_IT_TX_OVER : TX Buffer Overrun interrupt
* @arg I2C_IT_TX_EMPTY : TX_FIFO empty interrupt
* @arg I2C_IT_RD_REQ : I2C work as slave or master interrupt
* @arg I2C_IT_TX_ABRT : TX error interrupt (Master mode)
* @arg I2C_IT_RX_DONE : Master not ack interrupt (slave mode)
* @arg I2C_IT_ACTIVITY : I2C activity interrupt
* @arg I2C_IT_STOP_DET : stop condition interrupt
* @arg I2C_IT_START_DET : start condition interrupt
* @arg I2C_IT_GEN_CALL : a general call address and ack interrupt
* @retval : None
*/
void I2C_ClearITPendingBit(I2C_TypeDef* I2Cx, uint32_t I2C_IT)
{
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
assert_param(IS_I2C_CLEAR_IT(I2C_IT));
/* Clear the selected I2C flag */
if((I2C_IT & I2C_IT_RX_UNDER) == I2C_FLAG_RX_UNDER) {I2Cx->IC_CLR_RX_UNDER;}
if((I2C_IT & I2C_IT_RX_OVER) == I2C_FLAG_RX_OVER) {I2Cx->IC_CLR_RX_OVER;}
if((I2C_IT & I2C_IT_TX_OVER) == I2C_FLAG_TX_OVER) {I2Cx->IC_CLR_TX_OVER;}
if((I2C_IT & I2C_IT_RD_REQ) == I2C_FLAG_RD_REQ) {I2Cx->IC_CLR_RD_REQ;}
if((I2C_IT & I2C_IT_TX_ABRT) == I2C_FLAG_TX_ABRT) {I2Cx->IC_CLR_TX_ABRT;}
if((I2C_IT & I2C_IT_RX_DONE) == I2C_FLAG_RX_DONE) {I2Cx->IC_CLR_RX_DONE;}
if((I2C_IT & I2C_IT_ACTIVITY) == I2C_FLAG_ACTIVITY) {I2Cx->IC_CLR_ACTIVITY;}
if((I2C_IT & I2C_IT_STOP_DET) == I2C_FLAG_STOP_DET) {I2Cx->IC_CLR_STOP_DET;}
if((I2C_IT & I2C_IT_START_DET) == I2C_FLAG_START_DET){I2Cx->IC_CLR_START_DET;}
if((I2C_IT & I2C_IT_GEN_CALL) == I2C_FLAG_GEN_CALL) {I2Cx->IC_CLR_GEN_CALL;}
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/*-------------------------(C) COPYRIGHT 2017 MindMotion ----------------------*/
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