stm3210c_eval_ioe.c

STM32的SPI1与SPI2通信

    return (JOYState_TypeDef) JOY_DOWN;
  }
  else if (!(tmp & JOY_IO_LEFT))
  {
    return (JOYState_TypeDef) JOY_LEFT;
  }
  else if (!(tmp & JOY_IO_RIGHT))
  {
    return (JOYState_TypeDef) JOY_RIGHT;
  }
  else if (!(tmp & JOY_IO_UP))
  {
    return (JOYState_TypeDef) JOY_UP;
  }
  else
  { 
    return (JOYState_TypeDef) JOY_NONE;
  }
}

/**
  * @brief  Returns Status and positions of the Touch screen.
  * @param  None
  * @retval Pointer to TS_STATE structure holding Touch Screen information.
  */
TS_STATE* IOE_TS_GetState(void)
{
  uint32_t xDiff, yDiff , x , y, count;
  static uint32_t _x = 0, _y = 0;
  
  /* Check if the Touch detect event happenned */
  TS_State.TouchDetected = (I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_TSC_CTRL) & 0x80);

  /* Wait till end of ADC conversion */
  for (count = TS_CONVERSION_DELAY; count > 0; count--);

  if(TS_State.TouchDetected) 
  {
    x = IOE_TS_Read_X();
    y = IOE_TS_Read_Y();
    xDiff = x > _x? (x - _x): (_x - x);
    yDiff = y > _y? (y - _y): (_y - y);       
    if (xDiff + yDiff > 5)
    {
      _x = x;
      _y = y;       
    }
  }  
  /* Update the X position */
  TS_State.X = _x;
    
  /* Update the Y position */  
  TS_State.Y = _y;

  /* Update the Z Pression index */  
  TS_State.Z = IOE_TS_Read_Z();  
  
  /* Clear the interrupt pending bit and enable the FIFO again */
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_FIFO_STA, 0x01);
  I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_FIFO_STA, 0x00);
  
  /* Return pointer to the updated structure */
  return &TS_State; 
}

/**
  * @brief  Returns the temperature row value (in 16 bit format).
  * @param  None
  * @retval The temperature row value.
  */
uint32_t IOE_TempSens_GetData(void)
{  
  static __IO uint32_t tmp = 0;  
    
  /* Aquire data enable */
  I2C_WriteDeviceRegister(IOE_2_ADDR, IOE_REG_TEMP_CTRL, 0x03);
  
  /* Enable the TEMPSENS module */
  tmp = (uint32_t)((I2C_ReadDeviceRegister(IOE_2_ADDR, IOE_REG_TEMP_DATA) & 0x03) << 8); 
  tmp |= (uint32_t)I2C_ReadDeviceRegister(IOE_2_ADDR, IOE_REG_TEMP_DATA + 1); 
  
  tmp = (uint32_t)((33 * tmp * 100) / 751);
  tmp = (uint32_t)((tmp + 5) / 10);
  
  /* return the temprature row value */
  return tmp;
}

/**
  * @brief  Checks the selected Global interrupt source pending bit
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @param  Global_IT: the Global interrupt source to be checked, could be:
  *   @arg  Global_IT_GPIO : All IOs interrupt
  *   @arg  Global_IT_ADC : ADC interrupt
  *   @arg  Global_IT_TEMP : Temperature Sensor interrupts      
  *   @arg  Global_IT_FE : Touch Screen Controller FIFO Error interrupt
  *   @arg  Global_IT_FF : Touch Screen Controller FIFO Full interrupt      
  *   @arg  Global_IT_FOV : Touch Screen Controller FIFO Overrun interrupt     
  *   @arg  Global_IT_FTH : Touch Screen Controller FIFO Threshold interrupt   
  *   @arg  Global_IT_TOUCH : Touch Screen Controller Touch Detected interrupt      
  * @retval Status of the checked flag. Could be SET or RESET.
  */
FlagStatus IOE_GetGITStatus(uint8_t DeviceAddr, uint8_t Global_IT)
{
  __IO uint8_t tmp = 0;
 
  /* get the Interrupt status */
  tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_INT_STA);
    
  if ((tmp & (uint8_t)Global_IT) != 0)
  {
    return SET;
  }
  else
  {
    return RESET;
  }
}

/**
  * @brief  Clears the selected Global interrupt pending bit(s)
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @param  Global_IT: the Global interrupt to be cleared, could be any combination
  *         of the following values:   
  *   @arg  Global_IT_GPIO : All IOs interrupt
  *   @arg  Global_IT_ADC : ADC interrupt
  *   @arg  Global_IT_TEMP : Temperature Sensor interrupts      
  *   @arg  Global_IT_FE : Touch Screen Controller FIFO Error interrupt
  *   @arg  Global_IT_FF : Touch Screen Controller FIFO Full interrupt      
  *   @arg  Global_IT_FOV : Touch Screen Controller FIFO Overrun interrupt     
  *   @arg  Global_IT_FTH : Touch Screen Controller FIFO Threshold interrupt   
  *   @arg  Global_IT_TOUCH : Touch Screen Controller Touch Detected interrupt 
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_ClearGITPending(uint8_t DeviceAddr, uint8_t Global_IT)
{
  /* Write 1 to the bits that have to be cleared */
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_INT_STA, Global_IT); 

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

/**
  * @brief  Checks the status of the selected IO interrupt pending bit
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @param  IO_IT: the IO interrupt to be checked could be IO_ITx Where x can be 
  *         from 0 to 7.             
  * @retval Status of the checked flag. Could be SET or RESET.
  */
FlagStatus IOE_GetIOITStatus(uint8_t DeviceAddr, uint8_t IO_IT)
{
  uint8_t tmp = 0;
 
  /* get the Interrupt status */
  tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_INT_STA);
  
  if ((tmp & (uint8_t)IO_IT) != 0)
  {
    return SET;
  }
  else
  {
    return RESET;
  }
}

/**
  * @brief  Clears the selected IO interrupt pending bit(s).
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @param  IO_IT: the IO interrupt to be checked could be IO_ITx Where x can be 
  *         from 0 to 7.              
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_ClearIOITPending(uint8_t DeviceAddr, uint8_t IO_IT)
{
  /* Write 1 to the bits that have to be cleared */
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_INT_STA, IO_IT);  

  /* Clear the Edge detection pending bit*/
  I2C_WriteDeviceRegister(IOE_2_ADDR, IOE_REG_GPIO_ED, IO_IT);

  /* Clear the Rising edge pending bit */
  I2C_WriteDeviceRegister(IOE_2_ADDR, IOE_REG_GPIO_RE, IO_IT);

  /* Clear the Falling edge pending bit */
  I2C_WriteDeviceRegister(IOE_2_ADDR, IOE_REG_GPIO_FE, IO_IT);  

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

/**
  * @brief  Checks if the selected device is correctly configured and 
  *         communicates correctly ont the I2C bus.
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @retval IOE_OK if IOE is operational. Other value if failure.
  */
uint8_t IOE_IsOperational(uint8_t DeviceAddr)
{
  /* Return Error if the ID is not correct */
  if( IOE_ReadID(DeviceAddr) != (uint16_t)STMPE811_ID )
  {
    /* Check if a Timeout occured */
    if (IOE_TimeOut == 0)
    {
      return (IOE_TimeoutUserCallback());
    }
    else
    {
      return IOE_FAILURE; /* ID is not Correct */
    }
  } 
  else 
  {
    return IOE_OK; /* ID is correct */
  }
}

/**
  * @brief  Resets the IO Expander by Software (SYS_CTRL1, RESET bit).
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_Reset(uint8_t DeviceAddr)
{
  /* Power Down the IO_Expander */
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_SYS_CTRL1, 0x02);

  /* wait for a delay to insure registers erasing */
  _delay_(2); 
  
  /* Power On the Codec after the power off => all registers are reinitialized*/
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_SYS_CTRL1, 0x00);
  
  /* If all OK return IOE_OK */
  return IOE_OK;    
}

/**
  * @brief  Reads the selected device's ID.
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @retval The Device ID (two bytes).
  */
uint16_t IOE_ReadID(uint8_t DeviceAddr)
{
  uint16_t tmp = 0;

  /* Read device ID  */
  tmp = I2C_ReadDeviceRegister(DeviceAddr, 0);
  tmp = (uint32_t)(tmp << 8);
  tmp |= (uint32_t)I2C_ReadDeviceRegister(DeviceAddr, 1);
  
  /* Return the ID */
  return (uint16_t)tmp;
}

/**
  * @brief  Configures the selcted IO Expander functionalities.
  * @param  DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *         or IOE_2_ADDR.
  * @param  IOE_TEMPSENS_FCT: the functions to be configured. could be any 
  *         combination of the following values:
  *   @arg  IOE_IO_FCT : IO function
  *   @arg  IOE_TS_FCT : Touch Screen function
  *   @arg  IOE_ADC_FCT : ADC function
  *   @arg  IOE_TEMPSENS_FCT : Tempreature Sensor function
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_FnctCmd(uint8_t DeviceAddr, uint8_t Fct, FunctionalState NewState)
{
  uint8_t tmp = 0;
  
  /* Get the register value */
  tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_SYS_CTRL2);
  
  if (NewState != DISABLE)
  {
    /* Set the Functionalities to be Enabled */    
    tmp &= ~(uint8_t)Fct;
  }
  else
  {
    /* Set the Functionalities to be Disabled */    
    tmp |= (uint8_t)Fct;  
  }
  
  /* Set the register value */
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_SYS_CTRL2, tmp);
  
  /* If all OK return IOE_OK */
  return IOE_OK;    
}

/**
  * @brief  Configures the selected pin direction (to be an input or an output)
  * @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  Direction: could be Direction_IN or Direction_OUT.      
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_IOPinConfig(uint8_t DeviceAddr, uint8_t IO_Pin, uint8_t Direction)
{
  uint8_t tmp = 0;   
  
  /* Get all the Pins direction */
  tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_DIR);
  
  if (Direction != Direction_IN)
  {
    tmp |= (uint8_t)IO_Pin;
  }  
  else 
  {
    tmp &= ~(uint8_t)IO_Pin;
  }
  
  /* Write the register new value */
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_DIR, tmp);
  
  /* If all OK return IOE_OK */
  return IOE_OK;      
}

/**
  * @brief  Enables or disables the Global interrupt.
  * @param  DeviceAddr: The address of the IOExpander, could be :I OE_1_ADDR
  *         or IOE_2_ADDR.
  * @param  NewState: could be ENABLE or DISABLE.        
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_GITCmd(uint8_t DeviceAddr, FunctionalState NewState)
{
  uint8_t tmp = 0;
  
  /* Read the Interrupt Control register  */
  I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_INT_CTRL);
  
  if (NewState != DISABLE)
  {
    /* Set the global interrupts to be Enabled */    
    tmp |= (uint8_t)IOE_GIT_EN;
  }
  else
  {
    /* Set the global interrupts to be Disabled */    
    tmp &= ~(uint8_t)IOE_GIT_EN;
  }  
  
  /* Write Back the Interrupt Control register */
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_INT_CTRL, tmp);

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

/**
  * @brief  Configures the selected source to generate or not a global interrupt
  * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR
  *        or IOE_2_ADDR.
  * @param Global_IT: the interrupt source to be configured, could be:
  *   @arg  Global_IT_GPIO : All IOs interrupt
  *   @arg  Global_IT_ADC : ADC interrupt
  *   @arg  Global_IT_TEMP : Temperature Sensor interrupts      
  *   @arg  Global_IT_FE : Touch Screen Controller FIFO Error interrupt
  *   @arg  Global_IT_FF : Touch Screen Controller FIFO Full interrupt      
  *   @arg  Global_IT_FOV : Touch Screen Controller FIFO Overrun interrupt     
  *   @arg  Global_IT_FTH : Touch Screen Controller FIFO Threshold interrupt   
  *   @arg  Global_IT_TOUCH : Touch Screen Controller Touch Detected interrupt 
  * @retval IOE_OK: if all initializations are OK. Other value if error.
  */
uint8_t IOE_GITConfig(uint8_t DeviceAddr, uint8_t Global_IT, FunctionalState NewState)
{
  uint8_t tmp = 0;
  
  /* Get the current value of the INT_EN register */
  tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_INT_EN);
  
  if (NewState != DISABLE)
  {
    /* Set the interrupts to be Enabled */    
    tmp |= (uint8_t)Global_IT;  
  }
  else
  {
    /* Set the interrupts to be Disabled */    
    tmp &= ~(uint8_t)Global_IT;
  }
  /* Set the register */
  I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_INT_EN, tmp);