stm3210c_eval_ioe.c

STM32的SPI1与SPI2通信

  /* If all OK return IOE_OK */
  return IOE_OK;  
}

/**
  * @brief  Configures the selected pins to generate an interrupt or not.
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @param  IO_IT: The IO interrupt to be configured. This parameter could be any
  *         combination of the following values:
  *   @arg  IO_IT_x: where x can be from 0 to 7.
  * @param  NewState: could be ENABLE or DISABLE.  
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_IOITConfig(uint8_t DeviceAddr, uint8_t IO_IT, FunctionalState NewState)
{
  uint8_t tmp = 0;
 
  tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_INT_EN);
  
  if (NewState != DISABLE)
  {
    /* Set the interrupts to be Enabled */    
    tmp |= (uint8_t)IO_IT;
  }
  else
  {
    /* Set the interrupts to be Disabled */    
    tmp &= ~(uint8_t)IO_IT;
  }
  
  /* Set the register */
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_INT_EN, tmp);
  
  /* If all OK return IOE_OK */
  return IOE_OK;   
}

/**
  * @brief  Configures the touch Screen Controller (Single point detection)
  * @param  None
  * @retval IOE_OK if all initializations are OK. Other value if error.
  */
uint8_t IOE_TS_Config(void)
{
  uint8_t tmp = 0;  
  
  /* Enable TSC Fct: already done in IOE_Config */
  tmp = I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_SYS_CTRL2);
  tmp &= ~(uint32_t)(IOE_TS_FCT | IOE_ADC_FCT);
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_SYS_CTRL2, tmp); 
  
  /* Enable the TSC gloabl interrupts */
  tmp = I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_INT_EN);
  tmp |= (uint32_t)(IOE_GIT_TOUCH | IOE_GIT_FTH | IOE_GIT_FOV);
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_INT_EN, tmp); 
  
  /* Select Sample Time, bit number and ADC Reference */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_ADC_CTRL1, 0x49);
  
  /* Wait for ~20 ms */
  _delay_(2);  
  
  /* Select the ADC clock speed: 3.25 MHz */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_ADC_CTRL2, 0x01);
  
  /* Select TSC pins in non default mode */  
  tmp = I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_GPIO_AF);
  tmp &= ~(uint8_t)TOUCH_IO_ALL;
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_GPIO_AF, tmp); 
  
  /* Select 2 nF filter capacitor */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TSC_CFG, 0x9A);   
  
  /* Select single point reading  */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_FIFO_TH, 0x01);
  
  /* Write 0x01 to clear the FIFO memory content. */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_FIFO_STA, 0x01);
  
  /* Write 0x00 to put the FIFO back into operation mode  */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_FIFO_STA, 0x00);
  
  /* set the data format for Z value: 7 fractional part and 1 whole part */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TSC_FRACT_XYZ, 0x01);
  
  /* set the driving capability of the device for TSC pins: 50mA */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TSC_I_DRIVE, 0x01);
  
  /* Use no tracking index, touchscreen controller operation mode (XYZ) and 
     enable the TSC */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TSC_CTRL, 0x01);
  
  /*  Clear all the status pending bits */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_INT_STA, 0xFF); 
  
  /* Initialize the TS structure to their default values */ 
  TS_State.TouchDetected = TS_State.X = TS_State.Y = TS_State.Z = 0;
  
  /* All configuration done */
  return IOE_OK;  
}

/**
  * @brief  Configures and enables the Temperature sensor module.
  * @param  None
  * @retval IOE_OK if all initializations are OK. Other value if error.
  */
uint8_t IOE_TempSens_Config(void)
{
  __IO uint8_t tmp = 0;
  
  /* Enable Temperature Sensor Fct: already done in IOE_Config */
  tmp = I2C_ReadDeviceRegister(IOE_2_ADDR, IOE_REG_SYS_CTRL2);
  tmp &= ~(uint32_t)(IOE_TEMPSENS_FCT | IOE_ADC_FCT);
  I2C_WriteDeviceRegister(IOE_2_ADDR, IOE_REG_SYS_CTRL2, tmp);  
  
  /* Enable the TEMPSENS module */
  I2C_WriteDeviceRegister(IOE_2_ADDR, IOE_REG_TEMP_CTRL, 0x01);
  
  /* Aquire data enable */
  I2C_WriteDeviceRegister(IOE_2_ADDR, IOE_REG_TEMP_CTRL, 0x3);
  
  /* All configuration done */
  return IOE_OK;
}

/**
  * @brief  Configures the selected pin to be in Alternate function or not
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @param  IO_Pin: IO_Pin_x, Where x can be from 0 to 7.   
  * @param  NewState: State of the AF for the selected pin, could be 
  *         ENABLE or DISABLE.       
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_IOAFConfig(uint8_t DeviceAddr, uint8_t IO_Pin, FunctionalState NewState)
{
  uint8_t tmp = 0;
  
  /* Get the current state of the GPIO_AF register */
  tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_AF);
  
  if (NewState != DISABLE)
  {
    /* Enable the selected pins alternate function */
    tmp |= (uint8_t)IO_Pin;
  }
  else
  {
    /* Disable the selected pins alternate function */   
    tmp &= ~(uint8_t)IO_Pin;   
  }
  
  /* Write back the new valu in GPIO_AF register */  
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_AF, tmp);  

  /* If all OK return IOE_OK */
  return IOE_OK;
}

/**
  * @brief  Configures the Edge for which a transition is detectable for the
  *         the selected pin.
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @param  IO_Pin: IO_Pin_x, Where x can be from 0 to 7.   
  * @param  Edge: The edge which will be detected. This parameter can be one or a
  *         a combination of follwing values: EDGE_FALLING and EDGE_RISING .
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_IOEdgeConfig(uint8_t DeviceAddr, uint8_t IO_Pin, uint8_t Edge)
{
  uint8_t tmp1 = 0, tmp2 = 0;   
  
  /* Get the registers values */
  tmp1 = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_FE);
  tmp2 = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_RE);

  /* Disable the Falling Edge */
  tmp1 &= ~(uint8_t)IO_Pin;
  /* Disable the Falling Edge */
  tmp2 &= ~(uint8_t)IO_Pin;

  /* Enable the Falling edge if selected */
  if (Edge & EDGE_FALLING)
  {
    tmp1 |= (uint8_t)IO_Pin;
  }

  /* Enable the Rising edge if selected */
  if (Edge & EDGE_RISING)
  {
    tmp2 |= (uint8_t)IO_Pin;
  }

  /* Write back the registers values */
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_FE, tmp1);
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_RE, tmp2);
  
  /* if OK return 0 */
  return IOE_OK;
}

/**
  * @brief  Configures the Interrupt line active state and format (level/edge)
  * @param  Polarity: could be
  *   @arg  Polarity_Low: Interrupt line is active Low/Falling edge      
  *   @arg  Polarity_High: Interrupt line is active High/Rising edge      
  * @param  Type: Interrupt line activity type, could be one of the following values
  *   @arg  Type_Level: Interrupt line is active in level model         
  *   @arg  Type_Edge: Interrupt line is active in edge model           
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_ITOutConfig(uint8_t Polarity, uint8_t Type)
{
  uint8_t tmp = 0;
  
  /*  Get the register IOE_REG_INT_CTRL value */ 
  tmp = I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_INT_CTRL);
  
  /* Mask the polarity and type bits */
  tmp &= ~(uint8_t)0x06;
    
  /* Modify the Interrupt Output line configuration */
  tmp |= (uint8_t)(Polarity | Type);
  
  /* Set the register */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_INT_CTRL, tmp);
  
  
  /*  Get the register IOE_REG_INT_CTRL value */ 
  tmp = I2C_ReadDeviceRegister(IOE_2_ADDR, IOE_REG_INT_CTRL);
  /* Mask the polarity and type bits */
  tmp &= ~(uint8_t)0x06;
    
  /* Modify the Interrupt Output line configuration */
  tmp |= (uint8_t)(Polarity | Type);
  
  /* Set the register */
  I2C_WriteDeviceRegister(IOE_2_ADDR, IOE_REG_INT_CTRL, tmp);  
  
  /* If all OK return IOE_OK */
  return IOE_OK;  
}

/**
  * @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  Reads a register of the device through I2C.
  * @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 The value of the read register (0xAA if Timout occured)   
  */
uint8_t I2C_ReadDeviceRegister(uint8_t DeviceAddr, uint8_t RegisterAddr)
{
  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 */