stm3210c_eval_ioe.c

LWIP在STM32裸机上的移植

  *   @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 (TimeOut == 0)
    {
      return IOE_TIEMOUT;
    }
    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);
  
  /* 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 */