C++ I2C_DMACmd函数代码示例

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本文整理汇总了C++中I2C_DMACmd函数的典型用法代码示例。如果您正苦于以下问题：C++ I2C_DMACmd函数的具体用法？C++ I2C_DMACmd怎么用？C++ I2C_DMACmd使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了I2C_DMACmd函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: SendDataBy_I2C1

void SendDataBy_I2C1()
{
	DMA_ConfigForI2C1Send();
	I2C_AcknowledgeConfig(I2C1, ENABLE); 
	I2C_ITConfig(I2C1, I2C_IT_BUF , DISABLE);
	while(I2C_GetFlagStatus(CODEC_I2C, I2C_FLAG_BUSY))   //wait for bus is not busy
	{
	}
  /* Start the config sequence */
  I2C_GenerateSTART(CODEC_I2C, ENABLE);
	
	while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))   // EV5 
	{
	}
  /* Transmit the slave address and enable writing operation */
  I2C_Send7bitAddress(CODEC_I2C, CODEC_ADDRESS, I2C_Direction_Transmitter);
	DMA_Cmd(DMA1_Stream6, ENABLE);	
 	I2C_DMACmd(I2C2, ENABLE);
		/* DMA1 Channel6 transfer complete test */
	while(DMA_GetFlagStatus(DMA1_Stream6,DMA_FLAG_TCIF6)==RESET)
	{
	}	
  I2C_DMACmd(I2C1, DISABLE);
  DMA_Cmd(DMA1_Stream6, DISABLE);	
  // wait until BTF
  while (!(I2C1->SR1 & 0x04));
  I2C_GenerateSTOP(I2C1, ENABLE);
  // wait until BUSY clear
  while (I2C1->SR2 & 0x02);	
  if(I2C1->CR1 & 0x200)
      I2C1->CR1 &= 0xFDFF;
			
}

开发者ID:eseawind，项目名称:robotPlatfrom，代码行数:33，代码来源:I2C_MasterComInit.c

示例2: I2C1_Write

int16_t I2C1_Write(uint8_t * buffer, uint8_t address, uint16_t length)
{
    int16_t return_code = pdTRUE;
    uint16_t bytes_sent = 0;
    while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY)) {} /*TODO: Timeout*/
    I2C_GenerateSTART(I2C1, ENABLE);
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT)) {}
    I2C_Send7bitAddress(I2C1, address, I2C_Direction_Transmitter);
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) {}

    I2C1_DMA_TX_Semaphore = 0;
    
    if (length < 2)
    {
        while (bytes_sent < length)
        {
            I2C_SendData(I2C1, buffer[bytes_sent]);
            while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BTF) == RESET) {}
            bytes_sent++;
        }
        I2C_GenerateSTOP(I2C1, ENABLE);
        while(I2C1->CR1 & I2C_CR1_STOP) {}
    }
    else
    {
        I2C1_DMAConfig((uint32_t)buffer, length, DIR_TX);
        I2C_DMALastTransferCmd(I2C1, ENABLE);
        DMA_Cmd(I2C1_DMA_STREAM_TX, ENABLE);
        I2C_DMACmd(I2C1, ENABLE);
        
        /* Wait for DMA interrupt */
        while (I2C1_DMA_TX_Semaphore == 0) {}
    }
    return return_code;
}

开发者ID:drahosj，项目名称:avionics-software，代码行数:35，代码来源:i2c.c

示例3: GPIO_Configuration

void GPIO_Configuration(void)
{
	/* Disable the Serial Wire Jtag Debug Port SWJ-DP */
	GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable, ENABLE);
	/* Enable GPIOA, GPIOB, GPIOC, GPIOD, GPIOE and AFIO clocks */
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO, ENABLE);
	/* COnfigure All*/
	SetIoMode(GPIOA,GPIO_Pin_All,GPIO_Mode_Out_PP);
	SetIoMode(GPIOB,GPIO_Pin_All,GPIO_Mode_Out_PP);
	SetIoMode(GPIOC,GPIO_Pin_All,GPIO_Mode_Out_PP);
	SetIoMode(GPIOD,GPIO_Pin_All,GPIO_Mode_Out_PP);
	SetIoMode(GPIOE,GPIO_Pin_All,GPIO_Mode_Out_PP);
	/* Configure USART1*/
	SetIoMode(GPIOA,GPIO_Pin_9,GPIO_Mode_AF_PP);
	SetIoMode(GPIOA,GPIO_Pin_10,GPIO_Mode_IN_FLOATING);
	/* Configure USART2*/
	SetIoMode(GPIOA,GPIO_Pin_2,GPIO_Mode_AF_PP);
	SetIoMode(GPIOA,GPIO_Pin_3,GPIO_Mode_IN_FLOATING);
	/* Configure USART3*/
	SetIoMode(GPIOB,GPIO_Pin_10,GPIO_Mode_AF_PP);
	SetIoMode(GPIOB,GPIO_Pin_11,GPIO_Mode_IN_FLOATING);
	/* Configure CAN1 pin*/ 
	SetIoMode(GPIOA,GPIO_Pin_11,GPIO_Mode_IPU); 
	SetIoMode(GPIOA,GPIO_Pin_12,GPIO_Mode_AF_PP);
	/* Configure CAN2 pin*/ 
	SetIoMode(GPIOB,GPIO_Pin_8,GPIO_Mode_IPU); 
	SetIoMode(GPIOB,GPIO_Pin_9,GPIO_Mode_AF_PP);
	/* Configure ADC NISSAN*/
	SetIoMode(GPIOA,GPIO_Pin_0,GPIO_Mode_AIN);
	/* Configure BOOT1*/
	SetIoMode(GPIOB,GPIO_Pin_2,GPIO_Mode_IN_FLOATING);
	I2C_DMACmd(I2C2,DISABLE);
}

开发者ID:bg8wj，项目名称:icar-firmware，代码行数:33，代码来源:init.c

示例4: I2C_AcknowledgeConfig

void i2cMgr_t::ReadMany() {
    // Enable Acknowledgement
    I2C_AcknowledgeConfig(I2C1, ENABLE);
    // Prepare DMA
    DMA_DeInit(I2C_DMA_CHNL_RX);
    DMA_InitTypeDef DMA_InitStructure;
    //DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) &I2C1->DR;
    DMA_InitStructure.DMA_PeripheralBaseAddr = 0x40005410;
    // Decide where to read data to
    if(CmdToRead->DataToRead.Buf == 0) {    // no need in this data
        DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) &CmdToRead->DataToRead.InnerBuf[0];   // dummy place
        DMA_InitStructure.DMA_MemoryInc      = DMA_MemoryInc_Disable;   // Do not move pointer
    }
    else {
        DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) &CmdToRead->DataToRead.Buf[0];
        DMA_InitStructure.DMA_MemoryInc      = DMA_MemoryInc_Enable;
    }
    DMA_InitStructure.DMA_BufferSize         = CmdToRead->DataToRead.Length;
    DMA_InitStructure.DMA_DIR                = DMA_DIR_PeripheralSRC;  // From I2C to memory
    DMA_InitStructure.DMA_PeripheralInc      = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize     = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode               = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority           = DMA_Priority_Medium;
    DMA_InitStructure.DMA_M2M                = DMA_M2M_Disable;
    DMA_Init(I2C_DMA_CHNL_RX, &DMA_InitStructure);
    //Inform the DMA that the next End Of Transfer Signal will be the last one, need to send NACK after last byte
    I2C_DMALastTransferCmd(I2C1, ENABLE);
    // Start transmission
    I2C_DMACmd(I2C1, ENABLE);           // Enable DMA
    DMA_Cmd(I2C_DMA_CHNL_RX, ENABLE);   // Enable DMA channel

    Delay.Reset(&Timer);
}

开发者ID:Kreyl，项目名称:nute，代码行数:34，代码来源:i2c_mgr.cpp

示例5: sEE_Init

/**
  * @brief  Initializes peripherals used by the I2C EEPROM driver.
  * @param  None
  * @retval None
  */
void sEE_Init(void)
{ 
  I2C_InitTypeDef  I2C_InitStructure;
  
  sEE_LowLevel_Init();

  /* If the I2C peripheral is already enabled, don't reconfigure it */
  if ((sEE_I2C->CR1 & I2C_CR1_PE) == 0)
  {     
    /*!< I2C configuration */
    /* sEE_I2C configuration */
    I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
    I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
    I2C_InitStructure.I2C_OwnAddress1 = 0x00;
    I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
    I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
    
    /* Apply sEE_I2C configuration after enabling it */
    I2C_Init(sEE_I2C, &I2C_InitStructure);
  
    /* sEE_I2C Peripheral Enable */
    I2C_Cmd(sEE_I2C, ENABLE);
  }  

  /* Enable the sEE_I2C peripheral DMA requests */
  I2C_DMACmd(sEE_I2C, ENABLE);  

  /*!< Select the EEPROM address */
  sEEAddress = sEE_HW_ADDRESS;   
}

开发者ID:CHPeter，项目名称:stm32f429-gps，代码行数:36，代码来源:stm32f429i_discovery_i2c_ee.c

示例6: sEE_Init

/**
  * @brief  Initializes peripherals used by the I2C EEPROM driver.
  * @param  None
  * @retval None
  */
void sEE_Init(void)
{ 
  I2C_InitTypeDef  I2C_InitStructure;
  
  sEE_LowLevel_Init();
  
  /*!< I2C configuration */
  /* sEE_I2C configuration */
  I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
  I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
  I2C_InitStructure.I2C_OwnAddress1 = I2C_SLAVE_ADDRESS7;
  I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
  I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
  
  /* sEE_I2C Peripheral Enable */
  I2C_Cmd(sEE_I2C, ENABLE);
  /* Apply sEE_I2C configuration after enabling it */
  I2C_Init(sEE_I2C, &I2C_InitStructure);

  /* Enable the sEE_I2C peripheral DMA requests */
  I2C_DMACmd(sEE_I2C, ENABLE);
  
  #if 0
#if defined (sEE_M24C64_32)
  /*!< Select the EEPROM address according to the state of E0, E1, E2 pins */
  sEEAddress = sEE_HW_ADDRESS;  
#elif defined (sEE_M24C08)
  /*!< depending on the sEE Address selected in the stm322xg_eval_i2c_ee.h file */
 #ifdef sEE_Block0_ADDRESS
  /*!< Select the sEE Block0 to write on */
  sEEAddress = sEE_Block0_ADDRESS;
#elif defined (sEE_AT24C02)
	sEEAddress = 0xA0;
#endif	    

 #ifdef sEE_Block1_ADDRESS
  /*!< Select the sEE Block1 to write on */
  sEEAddress = sEE_Block1_ADDRESS;
 #endif

 #ifdef sEE_Block2_ADDRESS
  /*!< Select the sEE Block2 to write on */
  sEEAddress = sEE_Block2_ADDRESS;
 #endif
  
 #ifdef sEE_Block3_ADDRESS
  /*!< Select the sEE Block3 to write on */
  sEEAddress = sEE_Block3_ADDRESS;
 #endif 
#endif /*!< sEE_M24C64_32 */    
#endif

	sEEAddress = 0xA0;
}

开发者ID:kouliwei，项目名称:94STM32，代码行数:60，代码来源:i2c.c

示例7: SENSOR_I2C_BUS_Configuration

/********************
- I2C2初始化
*********************/
void SENSOR_I2C_BUS_Configuration(void)
{
	I2C_InitTypeDef I2C_InitStructure; 
	GPIO_InitTypeDef GPIO_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;

	// I2C Periph clock enable 
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);   
 
	// GPIO Periph clock enable 
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE); 

	// I2C configuration
	I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
	I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
	I2C_InitStructure.I2C_OwnAddress1 = 0xa0;
	I2C_InitStructure.I2C_Ack = I2C_Ack_Disable;
	I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
	I2C_InitStructure.I2C_ClockSpeed = I2C2_Speed;
	
	// Configure I2C2 SCL as alternate function Open-drain output 
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);
    
	// Configure I2C2 SDA as alternate function Open-drain output  
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);

	// Apply I2C configuration after enabling it
	//I2C_AcknowledgeConfig(SENSOR_I2C_BUS, ENABLE);
	I2C_Init(SENSOR_I2C_BUS, &I2C_InitStructure);
	
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
    NVIC_InitStructure.NVIC_IRQChannel = I2C2_EV_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 5;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
    NVIC_InitStructure.NVIC_IRQChannel = I2C2_ER_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 5;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

	// I2C Peripheral Enable
	I2C_ITConfig(SENSOR_I2C_BUS, I2C_IT_EVT|I2C_IT_ERR, ENABLE);
	I2C_DMACmd(SENSOR_I2C_BUS, DISABLE);
	I2C_Cmd(SENSOR_I2C_BUS, ENABLE);
}

开发者ID:mainbody，项目名称:YellowDog，代码行数:56，代码来源:PPP_init.c

示例8: I2C_DMA_Read

void I2C_DMA_Read(u8 slaveAddr, u8 readAddr)
{
/* Disable DMA channel*/
DMA_Cmd(DMA1_Channel7, DISABLE);
/* Set current data number again to 14 for MPu6050, only possible after disabling the DMA channel */
DMA_SetCurrDataCounter(DMA1_Channel7, 14);
 
/* While the bus is busy */
while(I2C_GetFlagStatus(MPU6050_I2C, I2C_FLAG_BUSY));
 
/* Enable DMA NACK automatic generation */
I2C_DMALastTransferCmd(MPU6050_I2C, ENABLE);  //Note this one, very important
 
/* Send START condition */
I2C_GenerateSTART(MPU6050_I2C, ENABLE);
 
/* Test on EV5 and clear it */
while(!I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_MODE_SELECT));
 
/* Send MPU6050 address for write */
I2C_Send7bitAddress(MPU6050_I2C, slaveAddr, I2C_Direction_Transmitter);
 
/* Test on EV6 and clear it */
while(!I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
 
/* Clear EV6 by setting again the PE bit */
I2C_Cmd(MPU6050_I2C, ENABLE);
 
/* Send the MPU6050's internal address to write to */
I2C_SendData(MPU6050_I2C, readAddr);
 
/* Test on EV8 and clear it */
while(!I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
 
/* Send STRAT condition a second time */
I2C_GenerateSTART(MPU6050_I2C, ENABLE);
 
/* Test on EV5 and clear it */
while(!I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_MODE_SELECT));
 
/* Send MPU6050 address for read */
I2C_Send7bitAddress(MPU6050_I2C, slaveAddr, I2C_Direction_Receiver);
 
/* Test on EV6 and clear it */
while(!I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
 
/* Start DMA to receive data from I2C */
DMA_Cmd(DMA1_Channel7, ENABLE);
I2C_DMACmd(MPU6050_I2C, ENABLE);
 
// When the data transmission is complete, it will automatically jump to DMA interrupt routine to finish the rest.
//now go back to the main routine
}

开发者ID:james54068，项目名称:vibration_test，代码行数:53，代码来源:MPU6050.c

示例9: i2c_dma_read

void i2c_dma_read( u8 read_addr)
{
//	read_addr +=1;
	//disable dma channel
	DMA_Cmd( MPU6050_DMA_CHANNEL, DISABLE);
	//? set current data number again to 14
	DMA_SetCurrDataCounter(MPU6050_DMA_CHANNEL, 14);

	//while the bus is busy
	while( I2C_GetFlagStatus( MPU6050_I2C,I2C_FLAG_BUSY));
	//enable dma nack automatic generation.....
	I2C_DMALastTransferCmd( MPU6050_I2C, ENABLE);

	//send start condition 
	I2C_GenerateSTART( MPU6050_I2C, ENABLE);

	//test on ev5 and clear it 
	while( !I2C_CheckEvent( MPU6050_I2C, I2C_EVENT_MASTER_MODE_SELECT));

	//send mpu6050 address for write
	I2C_Send7bitAddress( MPU6050_I2C, I2C1_MPU6050, I2C_Direction_Transmitter );
	
	//test on ev6 and clear it 
	while( !I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
	//clear ev6 by setting again the PE bit
	I2C_Cmd( MPU6050_I2C,ENABLE);

	//send the mpu6050 internal address to write to
	I2C_SendData( MPU6050_I2C, read_addr);

	//test on ev8 and clear it 
	while(!I2C_CheckEvent( MPU6050_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
	//send start condition a second time
	I2C_GenerateSTART(MPU6050_I2C, ENABLE);

	//test on ev5 and clear it 
	while( !I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_MODE_SELECT));
	
	//send mpu6050 address for read
	I2C_Send7bitAddress(MPU6050_I2C,I2C1_MPU6050, I2C_Direction_Receiver);
	
	//test on ev6 and clear it 
	while( !I2C_CheckEvent( MPU6050_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
	
	//start dma to receive data from i2c
	DMA_Cmd(MPU6050_DMA_CHANNEL, ENABLE);

	I2C_DMACmd(MPU6050_I2C, ENABLE);
	//when the data transmission is complete, it will automatically jump to dma interrupt routine
	//to finish the rest.
}

开发者ID:cross-sky，项目名称:stm32，代码行数:51，代码来源:mpu6050.c

示例10: I2C_Init_Func

void I2C_Init_Func(void)
{ 
	I2C_InitTypeDef  I2C_InitStructure;

	I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
	I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
	I2C_InitStructure.I2C_OwnAddress1 = I2C_SLAVE_ADDRESS7;
	I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
	I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
	I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;

	I2C_Cmd(sEE_I2C, ENABLE);
	I2C_Init(sEE_I2C, &I2C_InitStructure);
	I2C_DMACmd(sEE_I2C, ENABLE);
}

开发者ID:JSFamily，项目名称:stm32f103_dev，代码行数:15，代码来源:main.c

示例11: sendData

void sendData() {
	while(I2C_GetFlagStatus( I2C2, I2C_FLAG_BUSY ));
	I2C_GenerateSTART( I2C2, ENABLE );
	while( !I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT) );
	I2C_Send7bitAddress( I2C2, FM_WRITE_ADDRESS, I2C_Direction_Transmitter );
	while( !I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) );
	I2C_SendData( I2C2, out_buf[0] );
	while( !I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED) );

	/* Enable the DMA Channel4 Transfer Complete IT */
	DMA_ITConfig(DMA1_Channel4, DMA_IT_TC | DMA_IT_TE, ENABLE);
	I2C_DMACmd(I2C2, ENABLE);
	DMA_Cmd( DMA1_Channel4, ENABLE );

}

开发者ID:John-Uzumaki，项目名称:stm32-player，代码行数:15，代码来源:radio.c

示例12: I2C_Master_BufferWrite

/**  
  * @brief  Send a buffer of bytes to the slave.  
  * @param pBuffer: Buffer of bytes to be sent to the slave.  
  * @param NumByteToRead: Number of bytes to be sent to the slave.  
  * @retval : None.  
  */   
void I2C_Master_BufferWrite(uint8_t* pBuffer,  uint16_t NumByteToWrite)   
   
{   
   
#ifdef DMA_Master_Transmit   
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)pBuffer;   
    DMA_InitStructure.DMA_BufferSize = NumByteToWrite;   
    DMA_Init(DMA1_Channel6, &DMA_InitStructure);   
    I2C_ITConfig(I2C1, I2C_IT_EVT, ENABLE);   
    I2C_DMACmd(I2C1, ENABLE);   
    I2C_GenerateSTART(I2C1, ENABLE);   
    DMA_ITConfig(DMA1_Channel6, DMA_IT_TC, ENABLE);   
#endif   
   
   
#ifdef Polling_Master_Transmit   
   
    /* Send START condition */   
    I2C_GenerateSTART(I2C1, ENABLE);   
    /* Test on EV5 and clear it */   
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));   
    /* Send slave address for write */   
    I2C_Send7bitAddress(I2C1,SLAVE_ADDRESS, I2C_Direction_Transmitter);   
    /* Test on EV6 and clear it */   
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));   
    I2C_SendData(I2C1, *pBuffer);   
    pBuffer++;   
    NumByteToWrite--;   
    /* While there is data to be written */   
    while (NumByteToWrite--)   
    {   
        while ((I2C_GetLastEvent(I2C1) & 0x04) != 0x04);  /* Poll on BTF */   
        /* Send the current byte */   
        I2C_SendData(I2C1, *pBuffer);   
        /* Point to the next byte to be written */   
        pBuffer++;   
   
    }   
   
    /* Test on EV8_2 and clear it, BTF = TxE = 1, DR and shift registers are  
     empty */   
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));   
    /* Send STOP condition */   
    I2C_GenerateSTOP(I2C1, ENABLE);   
   
#endif   
   
}

开发者ID:emmamuelo，项目名称:IPM，代码行数:54，代码来源:driver.c

示例13: I2C2_EV_IRQHandler

/**  
  * @brief  This function handles I2C2 Event interrupt request.  
  * @param  None  
  * @retval : None  
  */   
void I2C2_EV_IRQHandler(void)   
{   
#ifdef slave2   
    uint8_t  j=0;   
#endif   
   
#if defined(DMA_Slave_Transmit) || defined(DMA_Slave_Receive)   
    __IO uint32_t temp;   
    __IO int32_t temp1;   
   
    if (I2C_GetFlagStatus(I2C2, I2C_FLAG_ADDR))   
    {   
        DMA_Cmd(DMA1_Channel1, ENABLE);   
        ADC_SoftwareStartConvCmd(ADC1, ENABLE);   
        if (DMA1_Channel1->CNDTR == 0)   
        {   
            DMA_Cmd(DMA1_Channel4, DISABLE);   
            DMA_Cmd(DMA1_Channel1, DISABLE);   
#ifdef slave2   
            /* Calculate the Temperature values */   
            for (j=0; j<BufferSize; j++)   
            {   
                temp1 =   Buffer[j];   
                temp1 = ( temp1 * 3300 ) / 0x1000;  /* Finds mV */   
                temp1 = ((((1430-temp1)*100000)/430)+25000)/1000;   
                Slave_Buffer_Tx[j] = temp1;   
            }   
   
#endif   
            DMA1_Channel4->CNDTR = 255;   
            DMA1_Channel1->CNDTR = BufferSize;   
            I2C_DMACmd(I2C2, ENABLE);   
            DMA_Cmd(DMA1_Channel4, ENABLE);   
            /* clear ADDR by reading SR2 */   
            temp = I2C2->SR2 ;   
        }   
   
   
    }   
   
    if (I2C_GetFlagStatus(I2C2, I2C_FLAG_STOPF))   
    {   
        I2C_Cmd(I2C2, ENABLE);   
    }   
   
#endif   
   
}

开发者ID:emmamuelo，项目名称:IPM，代码行数:53，代码来源:stm32f10x_it.c

示例14: sEE_Init

/**
  * @brief  Initializes peripherals used by the I2C EEPROM driver.
  * @param  None
  * @retval None
  */
void sEE_Init(void)
{
    sEE_LowLevel_Init();

    /*!< I2C configuration */
    /* sEE_I2C Peripheral Enable */
    I2C_Cmd(sEE_I2C, ENABLE);
    /* sEE_I2C configuration after enabling it */
    I2C_Init(sEE_I2C, I2C_SPEED, I2C_SLAVE_ADDRESS7, I2C_Mode_I2C, I2C_DutyCycle_2,
             I2C_Ack_Enable, I2C_AcknowledgedAddress_7bit);

    /* Enable the sEE_I2C peripheral DMA requests */
    I2C_DMACmd(sEE_I2C, ENABLE);

#if defined (sEE_M24C64_32)
    /*!< Select the EEPROM address according to the state of E0, E1, E2 pins */
    sEEAddress = sEE_HW_ADDRESS;
#endif /*!< sEE_M24C64_32 */
}

开发者ID:glockwork，项目名称:ev-stm8l151k6-emotor，代码行数:24，代码来源:stm8_eval_i2c_ee.c

示例15: I2C1_Read

int16_t I2C1_Read(uint8_t * buffer, uint8_t address, uint16_t length)
{
    int16_t return_code = pdTRUE;
    uint16_t bytes_received = 0;
    while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY)) {} /*TODO: Timeout*/
    I2C_GenerateSTART(I2C1, ENABLE);
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT)) {}
    I2C_Send7bitAddress(I2C1, address, I2C_Direction_Receiver);
    while(I2C_GetFlagStatus(I2C1, I2C_FLAG_ADDR) == RESET) {}

    I2C1_DMA_RX_Semaphore = 0;
    
    if (length < 2)
    {
        I2C_AcknowledgeConfig(I2C1, DISABLE);
        
        (void)I2C1->SR2;
        I2C_GenerateSTOP(I2C1, ENABLE);
        while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == RESET) {}
        if (length > 0)
        {
            buffer[bytes_received] = I2C_ReceiveData(I2C1);
        }
        while(I2C1->CR1 & I2C_CR1_STOP) {}
        
        I2C_AcknowledgeConfig(I2C1, ENABLE);
    }
    else
    {
        while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) {}
        I2C1_DMAConfig((uint32_t)buffer, length, DIR_RX);
        I2C_DMALastTransferCmd(I2C1, ENABLE);
        DMA_Cmd(I2C1_DMA_STREAM_RX, ENABLE);
        I2C_DMACmd(I2C1, ENABLE);
        
        /* Wait for DMA interrupt */
        while (I2C1_DMA_RX_Semaphore == 0) {}
    }
    return return_code;
}

开发者ID:drahosj，项目名称:avionics-software，代码行数:40，代码来源:i2c.c

示例16: DMA_DeInit

void i2cMgr_t::WriteMany() {
    // Prepare DMA
    DMA_DeInit(I2C_DMA_CHNL_TX);
    DMA_InitTypeDef DMA_InitStructure;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) &I2C1->DR;
    DMA_InitStructure.DMA_MemoryBaseAddr     = (uint32_t) &CmdToRead->DataToWrite.Buf[0];
    DMA_InitStructure.DMA_BufferSize         = CmdToRead->DataToWrite.Length;
    DMA_InitStructure.DMA_Priority           = DMA_Priority_High;
    DMA_InitStructure.DMA_DIR                = DMA_DIR_PeripheralDST;  // From memory to I2C
    DMA_InitStructure.DMA_Mode               = DMA_Mode_Normal;
    DMA_InitStructure.DMA_PeripheralInc      = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc          = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize     = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_M2M                = DMA_M2M_Disable;
    DMA_Init(I2C_DMA_CHNL_TX, &DMA_InitStructure);
    // Start transmission
    DMA_Cmd(I2C_DMA_CHNL_TX, ENABLE);   // Enable DMA channel
    I2C_DMACmd(I2C1, ENABLE);           // Enable DMA
    //Uart.PrintString("ST\r\r");
    Delay.Reset(&Timer);
}

开发者ID:Kreyl，项目名称:nute，代码行数:22，代码来源:i2c_mgr.cpp

示例17: main

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  /* At this stage the microcontroller clock setting is already configured, 
       this is done through SystemInit() function which is called from startup
       file (startup_stm32f2xx.s) before to branch to application main.
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f2xx.c file
     */     

  /* I2C configuration ---------------------------------------------------------*/
  I2C_Config();
  
  /* Initialize LEDs mounted on STM322xG-EVAL board */
  STM_EVAL_LEDInit(LED1);
  STM_EVAL_LEDInit(LED2);
  STM_EVAL_LEDInit(LED3);
  STM_EVAL_LEDInit(LED4);
  
  /* SysTick configuration -----------------------------------------------------*/
  SysTickConfig();
  
  /* Clear the RxBuffer */
  Fill_Buffer(RxBuffer, RXBUFFERSIZE);
  
  /*************************************Master Code******************************/
#if defined (I2C_MASTER)
 
  /* I2C Struct Initialize */
  I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
  I2C_InitStructure.I2C_DutyCycle = I2C_DUTYCYCLE;
  I2C_InitStructure.I2C_OwnAddress1 = 0xA0;
  I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
  I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
  
#ifndef I2C_10BITS_ADDRESS
  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
#else
  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_10bit;
#endif /* I2C_10BITS_ADDRESS */
  
  /* I2C Initialize */
  I2C_Init(I2Cx, &I2C_InitStructure);
  
  /* Master Transmitter --------------------------------------------------------*/   
  
  /* Generate the Start condition */
  I2C_GenerateSTART(I2Cx, ENABLE);
  
#ifdef I2C_10BITS_ADDRESS  
  /* Test on I2C1 EV5 and clear it */
  TimeOut = USER_TIMEOUT;
  while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT))&&(TimeOut != 0x00))
  {} 
  if(TimeOut == 0)
  {
    TimeOut_UserCallback();
  }
  /* Send Header to I2Cx for write or time out */
  I2C_SendData(I2Cx, HEADER_ADDRESS_Write);
  /* Test on I2Cx EV9 and clear it */
  TimeOut = USER_TIMEOUT;
  while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_ADDRESS10))&&(TimeOut != 0x00))
  {} 
  if(TimeOut == 0)
  {
    TimeOut_UserCallback();
  }
  /* Send I2Cx slave Address for write */
  I2C_Send7bitAddress(I2Cx, (uint8_t)SLAVE_ADDRESS, I2C_Direction_Transmitter);
  
 #else /* I2C_7BITS_ADDRESS */
      
  /* Test on I2Cx EV5 and clear it or time out */
  TimeOut = USER_TIMEOUT;
  while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT))&&(TimeOut != 0x00))
  {} 
  if(TimeOut == 0)
  {
    TimeOut_UserCallback();
  }
  /* Send I2Cx slave Address for write */
  I2C_Send7bitAddress(I2Cx, SLAVE_ADDRESS, I2C_Direction_Transmitter);
      
#endif /* I2C_10BITS_ADDRESS */
  
  /* Test on I2Cx EV6 and clear it or time out */
  TimeOut = USER_TIMEOUT;
  while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))&&(TimeOut != 0x00))
  {} 
  if(TimeOut == 0)
  {
    TimeOut_UserCallback();
  }
  /* I2Cx DMA Enable */
  I2C_DMACmd(I2Cx, ENABLE);
//.........这里部分代码省略.........

开发者ID:JanusRC，项目名称:T2-Terminus，代码行数:101，代码来源:main.c

示例18: main

/**
  * @brief   Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  /* System Clocks Configuration */
  RCC_Configuration();
       
  /* Configure the GPIO ports */
  GPIO_Configuration();

  /* DMA1 channel5 configuration ----------------------------------------------*/
  DMA_DeInit(DMA1_Channel5);
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)I2C2_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)I2C2_Buffer_Rx;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = BufferSize;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_MemoryDataSize_Byte;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel5, &DMA_InitStructure);

  /* DMA1 channel6 configuration ----------------------------------------------*/
  DMA_DeInit(DMA1_Channel6);
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)I2C1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)I2C1_Buffer_Tx;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_Init(DMA1_Channel6, &DMA_InitStructure);

  /* Enable I2C1 and I2C2 ----------------------------------------------------*/
  I2C_Cmd(I2C1, ENABLE);
  I2C_Cmd(I2C2, ENABLE);

  /* I2C1 configuration ------------------------------------------------------*/
  I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
  I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
  I2C_InitStructure.I2C_OwnAddress1 = I2C1_SLAVE_ADDRESS7;
  I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
  I2C_InitStructure.I2C_ClockSpeed = ClockSpeed;
  I2C_Init(I2C1, &I2C_InitStructure);
  /* I2C2 configuration ------------------------------------------------------*/
  I2C_InitStructure.I2C_OwnAddress1 = I2C2_SLAVE_ADDRESS7;
  I2C_Init(I2C2, &I2C_InitStructure);
  
  /*----- Transmission Phase -----*/
  /* Send I2C1 START condition */
  I2C_GenerateSTART(I2C1, ENABLE);
  /* Test on I2C1 EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));  
  /* Send I2C2 slave Address for write */
  I2C_Send7bitAddress(I2C1, I2C2_SLAVE_ADDRESS7, I2C_Direction_Transmitter);
  /* Test on I2C2 EV1 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED));  
  /* Test on I2C1 EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));  

  /* Enable I2C2 DMA */
  I2C_DMACmd(I2C2, ENABLE);
  /* Enable I2C1 DMA */
  I2C_DMACmd(I2C1, ENABLE);

  /* Enable DMA1 Channel5 */
  DMA_Cmd(DMA1_Channel5, ENABLE);
  /* Enable DMA1 Channel6 */
  DMA_Cmd(DMA1_Channel6, ENABLE);

  /* DMA1 Channel5 transfer complete test */
  while(!DMA_GetFlagStatus(DMA1_FLAG_TC5));
  /* DMA1 Channel6 transfer complete test */
  while(!DMA_GetFlagStatus(DMA1_FLAG_TC6));

  /* Send I2C1 STOP Condition */
  I2C_GenerateSTOP(I2C1, ENABLE);
  /* Test on I2C2 EV4 */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_SLAVE_STOP_DETECTED)); 
  /* Clear I2C2 STOPF flag: read operation to I2C_SR1 followed by a 
  write operation to I2C_CR1 */
  (void)(I2C_GetFlagStatus(I2C2, I2C_FLAG_STOPF));
  I2C_Cmd(I2C2, ENABLE);


  /* Check if the transmitted and received data are equal */
  TransferStatus = Buffercmp(I2C1_Buffer_Tx, I2C2_Buffer_Rx, BufferSize);
  /* TransferStatus = PASSED, if the transmitted and received data 
     are the same */
  /* TransferStatus = FAILED, if the transmitted and received data 
     are different */

  while (1)
  {
  }
}

开发者ID:DerekTan，项目名称:STM32F107_ucosIII，代码行数:100，代码来源:main.c

示例19: LM75_ShutDown

/**
  * @brief  Enables or disables the LM75.
  * @param  NewState: specifies the LM75 new status. This parameter can be ENABLE
  *         or DISABLE.  
  * @retval None
  */
uint8_t LM75_ShutDown(FunctionalState NewState)
{   
  uint8_t LM75_BufferRX[2] ={0,0};
  uint8_t LM75_BufferTX = 0;
  __IO uint8_t RegValue = 0;    
  
  /* Test on BUSY Flag */
  LM75_Timeout = LM75_LONG_TIMEOUT;
  while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BUSY)) 
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Configure DMA Peripheral */
  LM75_DMA_Config(LM75_DMA_RX, (uint8_t*)LM75_BufferRX, 2);  
  
  /* Enable DMA NACK automatic generation */
  I2C_DMALastTransferCmd(LM75_I2C, ENABLE);
  
  /* Enable the I2C peripheral */
  I2C_GenerateSTART(LM75_I2C, ENABLE);
  
  /* Test on SB Flag */
  LM75_Timeout = LM75_FLAG_TIMEOUT;
  while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) 
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Send device address for write */
  I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter);
  
  /* Test on ADDR Flag */
  LM75_Timeout = LM75_FLAG_TIMEOUT;
  while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) 
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Send the device's internal address to write to */
  I2C_SendData(LM75_I2C, LM75_REG_CONF);  
  
  /* Test on TXE FLag (data sent) */
  LM75_Timeout = LM75_FLAG_TIMEOUT;
  while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF)))  
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Send START condition a second time */  
  I2C_GenerateSTART(LM75_I2C, ENABLE);
  
  /* Test on SB Flag */
  LM75_Timeout = LM75_FLAG_TIMEOUT;
  while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) 
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Send LM75 address for read */
  I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Receiver);
  
  /* Test on ADDR Flag */
  LM75_Timeout = LM75_FLAG_TIMEOUT;
  while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))   
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Enable I2C DMA request */
  I2C_DMACmd(LM75_I2C,ENABLE);
  
  /* Enable DMA RX Channel */
  DMA_Cmd(LM75_DMA_RX_CHANNEL, ENABLE);
  
  /* Wait until DMA Transfer Complete */
  LM75_Timeout = LM75_LONG_TIMEOUT;
  while (!DMA_GetFlagStatus(LM75_DMA_RX_TCFLAG))
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }        
  
  /* Send STOP Condition */
  I2C_GenerateSTOP(LM75_I2C, ENABLE);
  
  /* Disable DMA RX Channel */
  DMA_Cmd(LM75_DMA_RX_CHANNEL, DISABLE);
  
  /* Disable I2C DMA request */  
  I2C_DMACmd(LM75_I2C,DISABLE);
  
  /* Clear DMA RX Transfer Complete Flag */
  DMA_ClearFlag(LM75_DMA_RX_TCFLAG);
  
//.........这里部分代码省略.........

开发者ID:0x00f，项目名称:STM32F1-workarea，代码行数:101，代码来源:stm32_eval_i2c_tsensor.c

示例20: LM75_WriteConfReg

/**
  * @brief  Write to the configuration register of the LM75.
  * @param  RegValue: sepecifies the value to be written to LM75 configuration 
  *         register.
  * @retval None
  */
uint8_t LM75_WriteConfReg(uint8_t RegValue)
{   
  uint8_t LM75_BufferTX = 0;  
  LM75_BufferTX = (uint8_t)(RegValue);
  
  /* Test on BUSY Flag */
  LM75_Timeout = LM75_LONG_TIMEOUT;
  while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BUSY)) 
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Configure DMA Peripheral */
  LM75_DMA_Config(LM75_DMA_TX, (uint8_t*)(&LM75_BufferTX), 1);
  
  /* Enable the I2C peripheral */
  I2C_GenerateSTART(LM75_I2C, ENABLE);
  
  /* Test on SB Flag */
  LM75_Timeout = LM75_FLAG_TIMEOUT;
  while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB) == RESET) 
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Transmit the slave address and enable writing operation */
  I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter);
  
  /* Test on ADDR Flag */
  LM75_Timeout = LM75_FLAG_TIMEOUT;
  while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Transmit the first address for r/w operations */
  I2C_SendData(LM75_I2C, LM75_REG_CONF);
  
  /* Test on TXE FLag (data sent) */
  LM75_Timeout = LM75_FLAG_TIMEOUT;
  while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF)))  
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Enable I2C DMA request */
  I2C_DMACmd(LM75_I2C,ENABLE);
  
  /* Enable DMA TX Channel */
  DMA_Cmd(LM75_DMA_TX_CHANNEL, ENABLE);
  
  /* Wait until DMA Transfer Complete */
  LM75_Timeout = LM75_LONG_TIMEOUT;
  while (!DMA_GetFlagStatus(LM75_DMA_TX_TCFLAG))
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }  
  
  /* Wait until BTF Flag is set before generating STOP */
  LM75_Timeout = LM75_LONG_TIMEOUT;
  while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF)))  
  {
    if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback();
  }
  
  /* Send STOP Condition */
  I2C_GenerateSTOP(LM75_I2C, ENABLE);
  
  /* Disable DMA TX Channel */
  DMA_Cmd(LM75_DMA_TX_CHANNEL, DISABLE);
  
  /* Disable I2C DMA request */  
  I2C_DMACmd(LM75_I2C,DISABLE);
  
  /* Clear DMA TX Transfer Complete Flag */
  DMA_ClearFlag(LM75_DMA_TX_TCFLAG);  
  
  return LM75_OK;
  
}

开发者ID:0x00f，项目名称:STM32F1-workarea，代码行数:86，代码来源:stm32_eval_i2c_tsensor.c

注：本文中的I2C_DMACmd函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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C++ I2C_DMACmd函数代码示例

示例1: SendDataBy_I2C1

示例2: I2C1_Write

示例3: GPIO_Configuration

示例4: I2C_AcknowledgeConfig

示例5: sEE_Init

示例6: sEE_Init

示例7: SENSOR_I2C_BUS_Configuration

示例8: I2C_DMA_Read

示例9: i2c_dma_read

示例10: I2C_Init_Func

示例11: sendData

示例12: I2C_Master_BufferWrite

示例13: I2C2_EV_IRQHandler

示例14: sEE_Init

示例15: I2C1_Read

示例16: DMA_DeInit

示例17: main

示例18: main

示例19: LM75_ShutDown

示例20: LM75_WriteConfReg

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