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;
}
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;
}
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);
}
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);
}
/**
* @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;
}
/**
* @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;
}
/********************
- 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);
}
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
}
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.
}
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);
}
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 );
}
/**
* @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
}
/**
* @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
}
/**
* @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 */
}
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;
}
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);
}
/**
* @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);
/* Enable DMA TX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_TX, ENABLE);
/* Wait until I2Cx_DMA_STREAM_TX enabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_TX)!= ENABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Wait until DMA Transfer Complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(I2Cx_DMA_STREAM_TX,I2Cx_TX_DMA_TCFLAG) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* I2Cx DMA Disable */
I2C_DMACmd(I2Cx, DISABLE);
/* Wait until BTF Flag is set before generating STOP or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_GetFlagStatus(I2Cx,I2C_FLAG_BTF))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send I2Cx STOP Condition */
I2C_GenerateSTOP(I2Cx, ENABLE);
/* Disable DMA TX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_TX, DISABLE);
/* Wait until I2Cx_DMA_STREAM_TX disabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_TX)!= DISABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear any pending flag on Tx Stream */
DMA_ClearFlag(I2Cx_DMA_STREAM_TX, I2Cx_TX_DMA_TCFLAG | I2Cx_TX_DMA_FEIFLAG | I2Cx_TX_DMA_DMEIFLAG | \
I2Cx_TX_DMA_TEIFLAG | I2Cx_TX_DMA_HTIFLAG);
/* Master Receiver -----------------------------------------------------------*/
/* Enable DMA NACK automatic generation */
I2C_DMALastTransferCmd(I2Cx, ENABLE);
/* Send I2Cx START condition */
I2C_GenerateSTART(I2Cx, ENABLE);
#ifdef I2C_10BITS_ADDRESS
/* Test on 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 Header to Slave for write */
I2C_SendData(I2Cx, HEADER_ADDRESS_Write);
/* Test on EV9 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_ADDRESS10))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send slave Address */
I2C_Send7bitAddress(I2Cx, (uint8_t)SLAVE_ADDRESS, I2C_Direction_Transmitter);
/* 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();
}
/* Repeated Start */
I2C_GenerateSTART(I2Cx, ENABLE);
/* Test on 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 Header to Slave for Read */
I2C_SendData(I2Cx, HEADER_ADDRESS_Read);
#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_Receiver);
#endif /* I2C_10BITS_ADDRESS */
/* Test on I2Cx EV6 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* I2Cx DMA Enable */
I2C_DMACmd(I2Cx, ENABLE);
/* Enable DMA RX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_RX, ENABLE);
/* Wait until I2Cx_DMA_STREAM_RX enabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_RX)!= ENABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(I2Cx_DMA_STREAM_RX,I2Cx_RX_DMA_TCFLAG)==RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send I2Cx STOP Condition */
I2C_GenerateSTOP(I2Cx, ENABLE);
/* Disable DMA RX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_RX, DISABLE);
/* Wait until I2Cx_DMA_STREAM_RX disabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_RX)!= DISABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Disable I2C DMA request */
I2C_DMACmd(I2Cx,DISABLE);
/* Clear any pending flag on Rx Stream */
DMA_ClearFlag(I2Cx_DMA_STREAM_RX, I2Cx_RX_DMA_TCFLAG | I2Cx_RX_DMA_FEIFLAG | I2Cx_RX_DMA_DMEIFLAG | \
I2Cx_RX_DMA_TEIFLAG | I2Cx_RX_DMA_HTIFLAG);
if (Buffercmp(TxBuffer, RxBuffer, RXBUFFERSIZE) == PASSED)
{
/* LED2, LED3 and LED4 Toggle */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
else
{ /* ED2, LED3 and LED4 On */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
#endif /* I2C_MASTER */
/**********************************Slave Code**********************************/
#if defined (I2C_SLAVE)
/* Initialize I2C peripheral */
/* I2C Init */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DUTYCYCLE;
I2C_InitStructure.I2C_OwnAddress1 = SLAVE_ADDRESS;
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_Init(I2Cx, &I2C_InitStructure);
/* Slave Receiver ------------------------------------------------------------*/
/* Test on I2C EV1 and clear it */
while (!I2C_CheckEvent(I2Cx, I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED))
{}
/* I2Cx DMA Enable */
I2C_DMACmd(I2Cx, ENABLE);
/* Enable DMA RX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_RX, ENABLE);
/* Wait until I2Cx_DMA_STREAM_RX enabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_RX)!= ENABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(I2Cx_DMA_STREAM_RX,I2Cx_RX_DMA_TCFLAG)==RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Test on I2Cx EV4 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_SLAVE_STOP_DETECTED))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Disable DMA RX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_RX, DISABLE);
/* Wait until I2Cx_DMA_STREAM_RX disabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_RX)!= DISABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Disable I2C DMA request */
I2C_DMACmd(I2Cx,DISABLE);
/* Clear any pending flag on Rx Stream */
DMA_ClearFlag(I2Cx_DMA_STREAM_RX, I2Cx_RX_DMA_TCFLAG | I2Cx_RX_DMA_FEIFLAG | I2Cx_RX_DMA_DMEIFLAG | \
I2Cx_RX_DMA_TEIFLAG | I2Cx_RX_DMA_HTIFLAG);
/* Slave Transmitter ---------------------------------------------------------*/
/* Test on I2C EV1 and clear it or time out*/
while (!I2C_CheckEvent(I2Cx, I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED))
{}
/* I2Cx DMA Enable */
I2C_DMACmd(I2Cx, ENABLE);
/* Enable DMA RX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_TX, ENABLE);
/* Wait until I2Cx_DMA_STREAM_TX enabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_TX)!= ENABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(I2Cx_DMA_STREAM_TX,I2Cx_TX_DMA_TCFLAG)==RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Test on I2Cx EV3-2 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_SLAVE_ACK_FAILURE))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Disable DMA TX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_TX, DISABLE);
/* Wait until I2Cx_DMA_STREAM_TX disabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_TX)!= DISABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Disable I2C DMA request */
I2C_DMACmd(I2Cx,DISABLE);
/* Clear any pending flag on Tx Stream */
DMA_ClearFlag(I2Cx_DMA_STREAM_TX, I2Cx_TX_DMA_TCFLAG | I2Cx_TX_DMA_FEIFLAG | I2Cx_TX_DMA_DMEIFLAG | \
I2Cx_TX_DMA_TEIFLAG | I2Cx_TX_DMA_HTIFLAG);
if (Buffercmp(TxBuffer, RxBuffer, RXBUFFERSIZE) == PASSED)
{
/* LED2, LED3 and LED4 are On */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
else
{ /* LED2, LED3 and LED4 are Off */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
#endif /* I2C_SLAVE */
while(1)
{}
}
/**
* @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)
{
}
}
/**
* @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);
/*!< Get received data */
RegValue = (uint8_t)LM75_BufferRX[0];
/*---------------------------- Transmission Phase ---------------------------*/
/*!< Enable or disable SD bit */
if (NewState != DISABLE)
{
/*!< Enable LM75 */
LM75_BufferTX = RegValue & LM75_SD_RESET;
}
else
{
/*!< Disable LM75 */
LM75_BufferTX = RegValue | LM75_SD_SET;
}
/* 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;
}
/**
* @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;
}
/**
* @brief Read the configuration register from the LM75.
* @param None
* @retval LM75 configuration register value.
*/
uint8_t LM75_ReadConfReg(void)
{
uint8_t LM75_BufferRX[2] ={0,0};
/* 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);
/*!< Return Temperature value */
return (uint8_t)LM75_BufferRX[0];
}
/**
* @brief Reads a buffer of 2 bytes from the device registers.
* @param DeviceAddr: The address of the device, could be : IOE_1_ADDR
* or IOE_2_ADDR.
* @param RegisterAddr: The target register adress (between 00x and 0x24)
* @retval A pointer to the buffer containing the two returned bytes (in halfword).
*/
uint16_t I2C_ReadDataBuffer(uint8_t DeviceAddr, uint32_t RegisterAddr)
{
uint8_t tmp= 0;
uint8_t IOE_BufferRX[2] = {0x00, 0x00};
/* Configure DMA Peripheral */
IOE_DMA_Config(IOE_DMA_RX, (uint8_t*)IOE_BufferRX);
/* Enable DMA NACK automatic generation */
I2C_DMALastTransferCmd(IOE_I2C, ENABLE);
/* Enable the I2C peripheral */
I2C_GenerateSTART(IOE_I2C, ENABLE);
/* Test on SB Flag */
IOE_TimeOut = TIMEOUT_MAX;
while (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_SB))
{
if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback());
}
/* Send device address for write */
I2C_Send7bitAddress(IOE_I2C, DeviceAddr, I2C_Direction_Transmitter);
/* Test on ADDR Flag */
IOE_TimeOut = TIMEOUT_MAX;
while (!I2C_CheckEvent(IOE_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
{
if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback());
}
/* Send the device's internal address to write to */
I2C_SendData(IOE_I2C, RegisterAddr);
/* Test on TXE FLag (data dent) */
IOE_TimeOut = TIMEOUT_MAX;
while ((!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_BTF)))
{
if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback());
}
/* Send START condition a second time */
I2C_GenerateSTART(IOE_I2C, ENABLE);
/* Test on SB Flag */
IOE_TimeOut = TIMEOUT_MAX;
while (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_SB))
{
if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback());
}
/* Send IOExpander address for read */
I2C_Send7bitAddress(IOE_I2C, DeviceAddr, I2C_Direction_Receiver);
/* Test on ADDR Flag */
IOE_TimeOut = TIMEOUT_MAX;
while (!I2C_CheckEvent(IOE_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))
{
if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback());
}
/* Enable I2C DMA request */
I2C_DMACmd(IOE_I2C,ENABLE);
/* Enable DMA RX Channel */
DMA_Cmd(IOE_DMA_RX_CHANNEL, ENABLE);
/* Wait until DMA Transfer Complete */
IOE_TimeOut = 2 * TIMEOUT_MAX;
while (!DMA_GetFlagStatus(IOE_DMA_RX_TCFLAG))
{
if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback());
}
/* Send STOP Condition */
I2C_GenerateSTOP(IOE_I2C, ENABLE);
/* Disable DMA RX Channel */
DMA_Cmd(IOE_DMA_RX_CHANNEL, DISABLE);
/* Disable I2C DMA request */
I2C_DMACmd(IOE_I2C,DISABLE);
/* Clear DMA RX Transfer Complete Flag */
DMA_ClearFlag(IOE_DMA_RX_TCFLAG);
/* Reorganize received data */
tmp = IOE_BufferRX[0];
IOE_BufferRX[0] = IOE_BufferRX[1];
IOE_BufferRX[1] = tmp;
/* return a pointer to the IOE_Buffer */
return *(uint16_t *)IOE_BufferRX;
}
/**
* @brief Writes a value in a register of the device through I2C.
* @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
* or IOE_2_ADDR.
* @param RegisterAddr: The target register adress
* @param RegisterValue: The target register value to be written
* @retval IOE_OK: if all operations are OK. Other value if error.
*/
uint8_t I2C_WriteDeviceRegister(uint8_t DeviceAddr, uint8_t RegisterAddr, uint8_t RegisterValue)
{
uint32_t read_verif = 0;
uint8_t IOE_BufferTX = 0;
/* Get Value to be written */
IOE_BufferTX = RegisterValue;
/* Configure DMA Peripheral */
IOE_DMA_Config(IOE_DMA_TX, (uint8_t*)(&IOE_BufferTX));
/* Enable the I2C peripheral */
I2C_GenerateSTART(IOE_I2C, ENABLE);
/* Test on SB Flag */
IOE_TimeOut = TIMEOUT_MAX;
while (I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_SB) == RESET)
{
if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback());
}
/* Transmit the slave address and enable writing operation */
I2C_Send7bitAddress(IOE_I2C, DeviceAddr, I2C_Direction_Transmitter);
/* Test on ADDR Flag */
IOE_TimeOut = TIMEOUT_MAX;
while (!I2C_CheckEvent(IOE_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
{
if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback());
}
/* Transmit the first address for r/w operations */
I2C_SendData(IOE_I2C, RegisterAddr);
/* Test on TXE FLag (data dent) */
IOE_TimeOut = TIMEOUT_MAX;
while ((!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_BTF)))
{
if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback());
}
/* Enable I2C DMA request */
I2C_DMACmd(IOE_I2C,ENABLE);
/* Enable DMA TX Channel */
DMA_Cmd(IOE_DMA_TX_CHANNEL, ENABLE);
/* Wait until DMA Transfer Complete */
IOE_TimeOut = TIMEOUT_MAX;
while (!DMA_GetFlagStatus(IOE_DMA_TX_TCFLAG))
{
if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback());
}
/* Wait until BTF Flag is set before generating STOP */
IOE_TimeOut = 2 * TIMEOUT_MAX;
while ((!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_BTF)))
{
}
/* Send STOP Condition */
I2C_GenerateSTOP(IOE_I2C, ENABLE);
/* Disable DMA TX Channel */
DMA_Cmd(IOE_DMA_TX_CHANNEL, DISABLE);
/* Disable I2C DMA request */
I2C_DMACmd(IOE_I2C,DISABLE);
/* Clear DMA TX Transfer Complete Flag */
DMA_ClearFlag(IOE_DMA_TX_TCFLAG);
#ifdef VERIFY_WRITTENDATA
/* Verify (if needed) that the loaded data is correct */
/* Read the just written register*/
read_verif = I2C_ReadDeviceRegister(DeviceAddr, RegisterAddr);
/* Load the register and verify its value */
if (read_verif != RegisterValue)
{
/* Control data wrongly tranfered */
read_verif = IOE_FAILURE;
}
else
{
/* Control data correctly transfered */
read_verif = 0;
}
#endif
/* Return the verifying value: 0 (Passed) or 1 (Failed) */
return read_verif;
}
/**
* @brief Writes more than one byte to the EEPROM with a single WRITE cycle.
*
* @note The number of bytes (combined to write start address) must not
* cross the EEPROM page boundary. This function can only write into
* the boundaries of an EEPROM page.
* This function doesn't check on boundaries condition (in this driver
* the function sEE_WriteBuffer() which calls sEE_WritePage() is
* responsible of checking on Page boundaries).
*
* @param pBuffer : pointer to the buffer containing the data to be written to
* the EEPROM.
* @param WriteAddr : EEPROM's internal address to write to.
* @param NumByteToWrite : pointer to the variable holding number of bytes to
* be written into the EEPROM.
*
* @note The variable pointed by NumByteToWrite is reset to 0 when all the
* data are written to the EEPROM. Application should monitor this
* variable in order know when the transfer is complete.
*
* @note This function just configure the communication and enable the DMA
* channel to transfer data. Meanwhile, the user application may perform
* other tasks in parallel.
*
* @retval sEE_OK (0) if operation is correctly performed, else return value
* different from sEE_OK (0) or the timeout user callback.
*/
uint32_t sEE_WritePage(uint8_t* pBuffer, uint16_t WriteAddr, uint8_t* NumByteToWrite)
{
/* Set the pointer to the Number of data to be written. This pointer will be used
by the DMA Transfer Completer interrupt Handler in order to reset the
variable to 0. User should check on this variable in order to know if the
DMA transfer has been complete or not. */
sEEDataWritePointer = NumByteToWrite;
/*!< While the bus is busy */
sEETimeout = sEE_LONG_TIMEOUT;
while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_BUSY))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Send START condition */
I2C_GenerateSTART(sEE_I2C, ENABLE);
/*!< Test on EV5 and clear it */
sEETimeout = sEE_FLAG_TIMEOUT;
while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_MODE_SELECT))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Send EEPROM address for write */
sEETimeout = sEE_FLAG_TIMEOUT;
I2C_Send7bitAddress(sEE_I2C, sEEAddress, I2C_Direction_Transmitter);
/*!< Test on EV6 and clear it */
sEETimeout = sEE_FLAG_TIMEOUT;
while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
#ifdef sEE_M24C08
/*!< Send the EEPROM's internal address to write to : only one byte Address */
I2C_SendData(sEE_I2C, WriteAddr);
#elif defined(sEE_M24C64_32)
/*!< Send the EEPROM's internal address to write to : MSB of the address first */
I2C_SendData(sEE_I2C, (uint8_t)((WriteAddr & 0xFF00) >> 8));
/*!< Test on EV8 and clear it */
sEETimeout = sEE_FLAG_TIMEOUT;
while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTING))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Send the EEPROM's internal address to write to : LSB of the address */
I2C_SendData(sEE_I2C, (uint8_t)(WriteAddr & 0x00FF));
#endif /*!< sEE_M24C08 */
/*!< Test on EV8 and clear it */
sEETimeout = sEE_FLAG_TIMEOUT;
while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTING))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/* Configure the DMA Tx Channel with the buffer address and the buffer size */
sEE_LowLevel_DMAConfig((uint32_t)pBuffer, (uint8_t)(*NumByteToWrite), sEE_DIRECTION_TX);
/* Enable the DMA Tx Stream */
DMA_Cmd(sEE_I2C_DMA_STREAM_TX, ENABLE);
/* Enable the sEE_I2C peripheral DMA requests */
I2C_DMACmd(sEE_I2C, ENABLE);
/* If all operations OK, return sEE_OK (0) */
return sEE_OK;
}
OSStatus MicoI2cInitialize( mico_i2c_device_t* device )
{
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;
MicoMcuPowerSaveConfig(false);
// Init I2C GPIO clocks
RCC_APB1PeriphClockCmd( i2c_mapping[device->port].peripheral_clock_reg, ENABLE );
RCC_AHB1PeriphClockCmd( i2c_mapping[device->port].pin_scl->peripheral_clock | i2c_mapping[device->port].pin_sda->peripheral_clock, ENABLE );
RCC_APB2PeriphClockCmd( RCC_APB2Periph_SYSCFG, ENABLE );
// Reset the I2C clock
RCC_APB1PeriphResetCmd( i2c_mapping[device->port].peripheral_clock_reg, ENABLE );
RCC_APB1PeriphResetCmd( i2c_mapping[device->port].peripheral_clock_reg, DISABLE );
// GPIO Configuration
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Pin = (uint32_t)( 1 << i2c_mapping[device->port].pin_scl->number );
GPIO_Init( i2c_mapping[device->port].pin_scl->bank, &GPIO_InitStructure );
GPIO_InitStructure.GPIO_Pin = (uint32_t)( 1 << i2c_mapping[device->port].pin_sda->number );
GPIO_Init( i2c_mapping[device->port].pin_sda->bank, &GPIO_InitStructure );
// Configure SDA and SCL as I2C pins
GPIO_PinAFConfig( i2c_mapping[device->port].pin_scl->bank, (uint16_t)i2c_mapping[device->port].pin_scl->number, (uint8_t)i2c_mapping[device->port].gpio_af );
GPIO_PinAFConfig( i2c_mapping[device->port].pin_sda->bank, (uint16_t)i2c_mapping[device->port].pin_sda->number, (uint8_t)i2c_mapping[device->port].gpio_af );
#ifdef I2C_USE_DMA
// Enable the DMA clock
RCC_AHB1PeriphClockCmd( i2c_mapping[device->port].tx_dma_peripheral_clock, ENABLE );
// Configure the DMA streams for operation with the CP
i2c_dma_init.DMA_Channel = i2c_mapping[device->port].tx_dma_channel;
i2c_dma_init.DMA_PeripheralBaseAddr = (uint32_t)&i2c_mapping[device->port].i2c->DR;
i2c_dma_init.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
i2c_dma_init.DMA_MemoryInc = DMA_MemoryInc_Enable;
i2c_dma_init.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
i2c_dma_init.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
i2c_dma_init.DMA_Mode = DMA_Mode_Normal;
i2c_dma_init.DMA_Priority = DMA_Priority_VeryHigh;
//dma_init.DMA_FIFOMode = DMA_FIFOMode_Enable;
//dma_init.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
i2c_dma_init.DMA_MemoryBurst = DMA_MemoryBurst_Single;
i2c_dma_init.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
i2c_dma_init.DMA_Memory0BaseAddr = (uint32_t) 0; // This parameter will be configured during communication
i2c_dma_init.DMA_DIR = DMA_DIR_MemoryToPeripheral; // This parameter will be configured during communication
i2c_dma_init.DMA_BufferSize = 0xFFFF; // This parameter will be configured during communication
DMA_DeInit( i2c_mapping[device->port].rx_dma_stream );
DMA_DeInit( i2c_mapping[device->port].tx_dma_stream );
// Clear any pending flags, disable, and clear the Tx DMA channel
//DMA_ClearFlag( i2c_mapping[device->port].tx_dma_stream, CP_TX_DMA_FLAG_FEIF | CP_TX_DMA_FLAG_DMEIF | CP_TX_DMA_FLAG_TEIF | CP_TX_DMA_FLAG_HTIF | CP_TX_DMA_FLAG_TCIF );
DMA_Cmd( i2c_mapping[device->port].tx_dma_stream, DISABLE );
DMA_Cmd( i2c_mapping[device->port].rx_dma_stream, DISABLE );
// Clear any pending flags, disable, and clear the Rx DMA channel
//DMA_ClearFlag( i2c_mapping[device->port].rx_dma_stream, CP_RX_DMA_FLAG_FEIF | CP_RX_DMA_FLAG_DMEIF | CP_RX_DMA_FLAG_TEIF | CP_RX_DMA_FLAG_HTIF | CP_RX_DMA_FLAG_TCIF );
#endif
// Initialize the InitStruct for the CP
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_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
if ( device->speed_mode == I2C_LOW_SPEED_MODE )
{
I2C_InitStructure.I2C_ClockSpeed = 10000;
}
else if ( device->speed_mode == I2C_STANDARD_SPEED_MODE )
{
I2C_InitStructure.I2C_ClockSpeed = 100000;
}
else if ( device->speed_mode == I2C_HIGH_SPEED_MODE )
{
I2C_InitStructure.I2C_ClockSpeed = 400000;
}
// Enable and initialize the I2C bus
I2C_Cmd ( i2c_mapping[device->port].i2c, ENABLE );
I2C_Init( i2c_mapping[device->port].i2c, &I2C_InitStructure );
#ifdef I2C_USE_DMA
// Enable DMA on the I2C bus
I2C_DMACmd( i2c_mapping[device->port].i2c, ENABLE );
#endif
MicoMcuPowerSaveConfig(true);
return kNoErr;
}
/*=====================================================================================================*/
void I2C_Config(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
NVIC_InitTypeDef NVIC_InitStruct;
I2C_InitTypeDef I2C_InitStruct;
RCC_APB1PeriphClockCmd(I2Cx_CLK, ENABLE);
RCC_AHB1PeriphClockCmd(DMAx_CLK, ENABLE);
RCC_AHB1PeriphClockCmd(I2Cx_SCL_GPIO_CLK | I2Cx_SDA_GPIO_CLK, ENABLE);
RCC_APB1PeriphResetCmd(I2Cx_CLK, DISABLE);
GPIO_PinAFConfig(I2Cx_SCL_GPIO_PORT, I2Cx_SCL_SOURCE, I2Cx_SCL_AF);
GPIO_PinAFConfig(I2Cx_SDA_GPIO_PORT, I2Cx_SDA_SOURCE, I2Cx_SDA_AF);
/* SCL I2Cx_SCL_PIN */ /* SDA I2Cx_SDA_PIN*/
GPIO_InitStruct.GPIO_Pin = I2Cx_SCL_PIN;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_OD;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(I2Cx_SCL_GPIO_PORT, &GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = I2Cx_SDA_PIN;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_OD;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(I2Cx_SDA_GPIO_PORT, &GPIO_InitStruct);
NVIC_InitStruct.NVIC_IRQChannel = DMAx_RX_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY - 3;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
NVIC_InitStruct.NVIC_IRQChannel = DMAx_TX_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY - 3;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
DMA_ClearFlag(DMAx_TX_STREAM, DMAx_TX_FLAG_FEIF | DMAx_TX_FLAG_DMEIF | DMAx_TX_FLAG_TEIF |
DMAx_TX_FLAG_HTIF | DMAx_TX_FLAG_TCIF);
DMA_Cmd(DMAx_TX_STREAM, DISABLE);
DMA_DeInit(DMAx_TX_STREAM);
DMA_InitStruct.DMA_Channel = DMAx_TX_CHANNEL;
DMA_InitStruct.DMA_PeripheralBaseAddr = (u32)I2Cx_DR_ADDR;
DMA_InitStruct.DMA_Memory0BaseAddr = (u32)0;
DMA_InitStruct.DMA_DIR = DMA_DIR_MemoryToPeripheral;
DMA_InitStruct.DMA_BufferSize = 0xFFFF;
DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStruct.DMA_Mode = DMA_Mode_Normal;
DMA_InitStruct.DMA_Priority = DMA_Priority_VeryHigh;
DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Enable;
DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMAx_TX_STREAM, &DMA_InitStruct);
DMA_ClearFlag(DMAx_RX_STREAM, DMAx_RX_FLAG_FEIF | DMAx_RX_FLAG_DMEIF | DMAx_RX_FLAG_TEIF |
DMAx_RX_FLAG_HTIF | DMAx_RX_FLAG_TCIF);
DMA_Cmd(DMAx_RX_STREAM, DISABLE);
DMA_DeInit(DMAx_RX_STREAM);
DMA_InitStruct.DMA_Channel = DMAx_RX_CHANNEL;
DMA_InitStruct.DMA_PeripheralBaseAddr = (u32)I2Cx_DR_ADDR;
DMA_InitStruct.DMA_Memory0BaseAddr = (u32)0;
DMA_InitStruct.DMA_DIR = DMA_DIR_MemoryToPeripheral;
DMA_InitStruct.DMA_BufferSize = 0xFFFF;
DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStruct.DMA_Mode = DMA_Mode_Normal;
DMA_InitStruct.DMA_Priority = DMA_Priority_VeryHigh;
DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Enable;
DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMAx_RX_STREAM, &DMA_InitStruct);
DMA_ITConfig(DMAx_TX_STREAM, DMA_IT_TC, ENABLE);
DMA_ITConfig(DMAx_RX_STREAM, DMA_IT_TC, ENABLE);
I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;
I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStruct.I2C_OwnAddress1 = 0x00;
I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStruct.I2C_ClockSpeed = I2Cx_SPEED;
I2C_Cmd(I2Cx, ENABLE);
I2C_Init(I2Cx, &I2C_InitStruct);
I2C_DMACmd(I2Cx, ENABLE);
}
uint32_t i2c_read(i2c_dev *dev, uint8_t addr, uint8_t *tx_buff, uint8_t txlen, uint8_t *rx_buff, uint8_t *rxlen)
{
/* Set the pointer to the Number of data to be read. This pointer will be used
by the DMA Transfer Completer interrupt Handler in order to reset the
variable to 0. User should check on this variable in order to know if the
DMA transfer has been complete or not. */
if(dev->I2Cx == I2C1)
I2C1DataReadPointer = (uint16_t*) rxlen;
else
I2C2DataReadPointer = (uint16_t*) rxlen;
//uint16_t received;
//int flags;
//uint16_t ptr;
uint8_t *buffer8 = rx_buff;
//errno_r = 0;
//received = 0;
// While the bus is busy
dev->timeout = sEE_LONG_TIMEOUT;
while (I2C_GetFlagStatus(dev->I2Cx, I2C_FLAG_BUSY ))
{
if ((dev->timeout--) == 0)
return I2C_ERROR;
}
// Send START condition
I2C_GenerateSTART(dev->I2Cx, ENABLE);
// Test on EV5 and clear it (cleared by reading SR1 then writing to DR)
dev->timeout = sEE_FLAG_TIMEOUT;
while (!I2C_CheckEvent(dev->I2Cx, I2C_EVENT_MASTER_MODE_SELECT ))
{
if ((dev->timeout--) == 0)
return I2C_ERROR;
}
// Send address for write
I2C_Send7bitAddress(dev->I2Cx, addr, I2C_Direction_Transmitter );
dev->timeout = sEE_FLAG_TIMEOUT;
// Test on EV6 and clear it
while (!I2C_CheckEvent(dev->I2Cx,
I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ))
{
if ((dev->timeout--) == 0)
return I2C_ERROR;
}
I2C_SendData(dev->I2Cx, *tx_buff++);
// Test on EV8 and clear it
dev->timeout = sEE_FLAG_TIMEOUT;
while (I2C_GetFlagStatus(dev->I2Cx, I2C_FLAG_BTF ) == RESET)
{
if ((dev->timeout--) == 0)
return I2C_ERROR;
}
// Send STRAT condition a second time
I2C_GenerateSTART(dev->I2Cx, ENABLE);
// Test on EV5 and clear it (cleared by reading SR1 then writing to DR)
dev->timeout = sEE_FLAG_TIMEOUT;
while (!I2C_CheckEvent(dev->I2Cx, I2C_EVENT_MASTER_MODE_SELECT ))
{
if ((dev->timeout--) == 0)
return I2C_ERROR;
}
// Send address for read
I2C_Send7bitAddress(dev->I2Cx, addr, I2C_Direction_Receiver );
if ((uint16_t)(*rxlen) < 2)
{
dev->timeout = sEE_FLAG_TIMEOUT;
while (I2C_GetFlagStatus(dev->I2Cx, I2C_FLAG_ADDR ) == RESET)
{
if ((dev->timeout--) == 0)
return I2C_ERROR;
}
// Disable Acknowledgement
I2C_AcknowledgeConfig(dev->I2Cx, DISABLE);
/* Clear ADDR register by reading SR1 then SR2 register (SR1 has already been read) */
(void) dev->I2Cx->SR2;
/*!< STOP condition */
I2C_GenerateSTOP(dev->I2Cx, DISABLE);
I2C_ClearFlag(dev->I2Cx, I2C_FLAG_STOPF );
/* Send STOP condition */
I2C_GenerateSTOP(dev->I2Cx, ENABLE);
/* Wait for the byte to be received */
dev->timeout = sEE_FLAG_TIMEOUT;
while (I2C_GetFlagStatus(dev->I2Cx, I2C_FLAG_RXNE ) == RESET)
{
if ((dev->timeout--) == 0)
return I2C_ERROR;
}
/*!< Read the byte received from the EEPROM */
*buffer8 = I2C_ReceiveData(dev->I2Cx);
(uint16_t)(*rxlen)--;
/* Wait to make sure that STOP control bit has been cleared */
dev->timeout = sEE_FLAG_TIMEOUT;
while (dev->I2Cx->CR1 & I2C_CR1_STOP )
{
if ((dev->timeout--) == 0)
return I2C_ERROR;
}
// Re-Enable Acknowledgement to be ready for another reception
I2C_AcknowledgeConfig(dev->I2Cx, ENABLE);
}
else/* More than one Byte Master Reception procedure (DMA) -----------------*/
{
/*!< Test on EV6 and clear it */
dev->timeout = sEE_FLAG_TIMEOUT;
while (!I2C_CheckEvent(dev->I2Cx,
I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED ))
{
if ((dev->timeout--) == 0)
return I2C_ERROR;
}
/* Configure the DMA Rx Channel with the buffer address and the buffer size */
sEE_LowLevel_DMAConfig(dev, (uint32_t) buffer8, (uint16_t)(*rxlen),
sEE_DIRECTION_RX);
/* Inform the DMA that the next End Of Transfer Signal will be the last one */
I2C_DMALastTransferCmd(dev->I2Cx, ENABLE);
/* Enable the DMA Rx Stream */
if (dev->I2Cx == I2C1){
DMA_Cmd(sEE_I2C1_DMA_STREAM_RX, ENABLE);
} else if(dev->I2Cx == I2C2){
DMA_Cmd(sEE_I2C2_DMA_STREAM_RX, ENABLE);
}
/* Enable the sEE_I2C peripheral DMA requests */
I2C_DMACmd(dev->I2Cx, ENABLE);
}
return I2C_OK;
}
static void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
I2C_InitTypeDef I2C_InitStruct;
GPIO_InitStructure.GPIO_Pin = I2Cx_SCL_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(I2Cx_SCL_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = I2Cx_SDA_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(I2Cx_SDA_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB,I2Cx_SCL_PIN|I2Cx_SDA_PIN|GPIO_Pin_8|GPIO_Pin_9);
I2C_Cmd(I2Cx, DISABLE);
I2C_DeInit(I2Cx);
I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;
I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStruct.I2C_OwnAddress1 = 0x00;
I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStruct.I2C_ClockSpeed = I2Cx_SPEED;
I2C_Init(I2Cx, &I2C_InitStruct);
I2C_Cmd(I2Cx, ENABLE);
DMA_ClearFlag(DMAx_TX_FLAG_GLIF | DMAx_TX_FLAG_TEIF |
DMAx_TX_FLAG_HTIF | DMAx_TX_FLAG_TCIF);
DMA_Cmd(DMAx_TX_CHANNEL, DISABLE);
DMA_DeInit(DMAx_TX_CHANNEL);
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)I2Cx_DR_ADDR;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)0;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_BufferSize = 0xFFFF;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_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(DMAx_TX_CHANNEL, &DMA_InitStructure);
DMA_ClearFlag(DMAx_RX_FLAG_GLIF | DMAx_RX_FLAG_TEIF |
DMAx_RX_FLAG_HTIF | DMAx_RX_FLAG_TCIF);
DMA_Cmd(DMAx_RX_CHANNEL, DISABLE);
DMA_DeInit(DMAx_RX_CHANNEL);
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)I2Cx_DR_ADDR;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)0;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 0xFFFF;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_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(DMAx_RX_CHANNEL, &DMA_InitStructure);
DMA_ITConfig(DMAx_TX_CHANNEL, DMA_IT_TC, ENABLE);
DMA_ITConfig(DMAx_RX_CHANNEL, DMA_IT_TC|DMA_IT_TE, ENABLE);
I2C_DMACmd(I2Cx,ENABLE);
}
/**
* @brief Reads a block of data from the EEPROM.
* @param pBuffer : pointer to the buffer that receives the data read from
* the EEPROM.
* @param ReadAddr : EEPROM's internal address to start reading from.
* @param NumByteToRead : pointer to the variable holding number of bytes to
* be read from the EEPROM.
*
* @note The variable pointed by NumByteToRead is reset to 0 when all the
* data are read from the EEPROM. Application should monitor this
* variable in order know when the transfer is complete.
*
* @note When number of data to be read is higher than 1, this function just
* configures the communication and enable the DMA channel to transfer data.
* Meanwhile, the user application may perform other tasks.
* When number of data to be read is 1, then the DMA is not used. The byte
* is read in polling mode.
*
* @retval sEE_OK (0) if operation is correctly performed, else return value
* different from sEE_OK (0) or the timeout user callback.
*/
uint32_t sEE_ReadBuffer(uint8_t* pBuffer, uint16_t ReadAddr, uint16_t* NumByteToRead)
{
/* Set the pointer to the Number of data to be read. This pointer will be used
by the DMA Transfer Completer interrupt Handler in order to reset the
variable to 0. User should check on this variable in order to know if the
DMA transfer has been complete or not. */
sEEDataReadPointer = NumByteToRead;
/*!< While the bus is busy */
sEETimeout = sEE_LONG_TIMEOUT;
while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_BUSY))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Send START condition */
I2C_GenerateSTART(sEE_I2C, ENABLE);
/*!< Test on EV5 and clear it (cleared by reading SR1 then writing to DR) */
sEETimeout = sEE_FLAG_TIMEOUT;
while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_MODE_SELECT))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Send EEPROM address for write */
I2C_Send7bitAddress(sEE_I2C, sEEAddress, I2C_Direction_Transmitter);
/*!< Test on EV6 and clear it */
sEETimeout = sEE_FLAG_TIMEOUT;
while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
#ifdef sEE_M24C08
/*!< Send the EEPROM's internal address to read from: Only one byte address */
I2C_SendData(sEE_I2C, ReadAddr);
#elif defined (sEE_M24C64_32)
/*!< Send the EEPROM's internal address to read from: MSB of the address first */
I2C_SendData(sEE_I2C, (uint8_t)((ReadAddr & 0xFF00) >> 8));
/*!< Test on EV8 and clear it */
sEETimeout = sEE_FLAG_TIMEOUT;
while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTING))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Send the EEPROM's internal address to read from: LSB of the address */
I2C_SendData(sEE_I2C, (uint8_t)(ReadAddr & 0x00FF));
#endif /*!< sEE_M24C08 */
/*!< Test on EV8 and clear it */
sEETimeout = sEE_FLAG_TIMEOUT;
while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_BTF) == RESET)
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Send STRAT condition a second time */
I2C_GenerateSTART(sEE_I2C, ENABLE);
/*!< Test on EV5 and clear it (cleared by reading SR1 then writing to DR) */
sEETimeout = sEE_FLAG_TIMEOUT;
while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_MODE_SELECT))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Send EEPROM address for read */
I2C_Send7bitAddress(sEE_I2C, sEEAddress, I2C_Direction_Receiver);
/* If number of data to be read is 1, then DMA couldn't be used */
/* One Byte Master Reception procedure (POLLING) ---------------------------*/
if ((uint16_t)(*NumByteToRead) < 2)
{
/* Wait on ADDR flag to be set (ADDR is still not cleared at this level */
sEETimeout = sEE_FLAG_TIMEOUT;
while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_ADDR) == RESET)
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Disable Acknowledgment */
I2C_AcknowledgeConfig(sEE_I2C, DISABLE);
/* Clear ADDR register by reading SR1 then SR2 register (SR1 has already been read) */
(void)sEE_I2C->SR2;
/*!< Send STOP Condition */
I2C_GenerateSTOP(sEE_I2C, ENABLE);
/* Wait for the byte to be received */
sEETimeout = sEE_FLAG_TIMEOUT;
while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_RXNE) == RESET)
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Read the byte received from the EEPROM */
*pBuffer = I2C_ReceiveData(sEE_I2C);
/*!< Decrement the read bytes counter */
(uint16_t)(*NumByteToRead)--;
/* Wait to make sure that STOP control bit has been cleared */
sEETimeout = sEE_FLAG_TIMEOUT;
while(sEE_I2C->CR1 & I2C_CR1_STOP)
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/*!< Re-Enable Acknowledgment to be ready for another reception */
I2C_AcknowledgeConfig(sEE_I2C, ENABLE);
}
else/* More than one Byte Master Reception procedure (DMA) -----------------*/
{
/*!< Test on EV6 and clear it */
sEETimeout = sEE_FLAG_TIMEOUT;
while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))
{
if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback();
}
/* Configure the DMA Rx Channel with the buffer address and the buffer size */
sEE_LowLevel_DMAConfig((uint32_t)pBuffer, (uint16_t)(*NumByteToRead), sEE_DIRECTION_RX);
/* Inform the DMA that the next End Of Transfer Signal will be the last one */
I2C_DMALastTransferCmd(sEE_I2C, ENABLE);
/* Enable the DMA Rx Stream */
DMA_Cmd(sEE_I2C_DMA_STREAM_RX, ENABLE);
/* Enable the sEE_I2C peripheral DMA requests */
I2C_DMACmd(sEE_I2C, ENABLE);
}
/* If all operations OK, return sEE_OK (0) */
return sEE_OK;
}
/**
* @brief Reads buffer of bytes from the slave.
* @param pBuffer: Buffer of bytes to read from the slave.
* @param NumByteToRead: Number of bytes to be read by the Master.
* @retval : None.
*/
void I2C_Master_BufferRead(uint8_t* pBuffer, uint16_t NumByteToRead)
{
#ifdef DMA_Master_Receive
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)pBuffer;
DMA_InitStructure.DMA_BufferSize = NumByteToRead;
DMA_Init(DMA1_Channel7, &DMA_InitStructure);
I2C_ITConfig(I2C1, I2C_IT_EVT, ENABLE);
/* Set Last bit to have a NACK on the last received byte */
I2C_DMALastTransferCmd(I2C1, ENABLE);
I2C_DMACmd(I2C1, ENABLE);
/* Enable the DMA Channel7 Transfer Complete IT */
DMA_ITConfig(DMA1_Channel7, DMA_IT_TC, ENABLE);
/* Generate the START */
I2C_GenerateSTART(I2C1, ENABLE);
#endif
#ifdef Polling_Master_Receive
/* 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 read */
I2C_Send7bitAddress(I2C1, SLAVE_ADDRESS, I2C_Direction_Receiver);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
/* While there is data to be read; here the safe procedure is implemented */
while (NumByteToRead)
{
if (NumByteToRead != 3) /* Receive bytes from first byte until byte N-3 */
{
while ((I2C_GetLastEvent(I2C1) & 0x00004) != 0x000004); /* Poll on BTF */
/* Read data */
*pBuffer = I2C_ReceiveData(I2C1);
pBuffer++;
/* Decrement the read bytes counter */
NumByteToRead--;
}
if (NumByteToRead == 3) /* it remains to read three data: data N-2, data N-1, Data N */
{
/* Data N-2 in DR and data N -1 in shift register */
while ((I2C_GetLastEvent(I2C1) & 0x000004) != 0x0000004); /* Poll on BTF */
/* Clear ACK */
I2C_AcknowledgeConfig(I2C1, DISABLE);
__disable_irq();
/* Read Data N-2 */
*pBuffer = I2C_ReceiveData(I2C1);
pBuffer++;
/* Program the STOP */
I2C_GenerateSTOP(I2C1, ENABLE);
/* Read DataN-1 */
*pBuffer = I2C_ReceiveData(I2C1);
__enable_irq();
pBuffer++;
while ((I2C_GetLastEvent(I2C1) & 0x00000040) != 0x0000040); /* Poll on RxNE */
/* Read DataN */
*pBuffer = I2C1->DR;
/* Reset the number of bytes to be read by master */
NumByteToRead = 0;
}
}
/* Make sure that the STOP bit is cleared by Hardware before CR1 write access */
while ((I2C1->CR1&0x200) == 0x200);
/* Enable Acknowledgement to be ready for another reception */
I2C_AcknowledgeConfig(I2C1, ENABLE);
#endif
}
