File content as of revision 57:fa4c622b04a7:

/**
 ******************************************************************************
 * @file    STMPE1600.h
 * @author  AST / EST
 * @version V0.0.1
 * @date    14-April-2015
 * @brief   Header file for component stmpe1600
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *   1. Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *   2. Redistributions in binary form must reproduce the above copyright notice,
 *      this list of conditions and the following disclaimer in the documentation
 *      and/or other materials provided with the distribution.
 *   3. Neither the name of STMicroelectronics nor the names of its contributors
 *      may be used to endorse or promote products derived from this software
 *       without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 ******************************************************************************
*/
#ifndef __STMPE1600_CLASS
#define __STMPE1600_CLASS
/* Includes ------------------------------------------------------------------*/
#include    "DevI2C.h"

#define STMPE1600_DEF_DEVICE_ADDRESS  (uint8_t)0x42*2   
#define STMPE1600_DEF_DIGIOUT_LVL      1

/**  STMPE1600 registr map **/
#define ChipID_0_7      (uint8_t)0x00
#define ChipID_8_15     (uint8_t)0x01
#define VersionId       (uint8_t)0x02
#define SYS_CTRL        (uint8_t)0x03
#define IEGPIOR_0_7	    (uint8_t)0x08
#define IEGPIOR_8_15	  (uint8_t)0x09
#define ISGPIOR_0_7	    (uint8_t)0x0A
#define ISGPIOR_8_15	  (uint8_t)0x0B
#define GPMR_0_7	      (uint8_t)0x10
#define GPMR_8_15	      (uint8_t)0x11
#define GPSR_0_7	      (uint8_t)0x12
#define GPSR_8_15	      (uint8_t)0x13
#define GPDR_0_7	      (uint8_t)0x14
#define GPDR_8_15	      (uint8_t)0x15
#define GPIR_0_7	      (uint8_t)0x16
#define GPIR_8_15	      (uint8_t)0x17

#define SOFT_RESET			(uint8_t)0x80

typedef enum {
    // GPIO Expander pin names
    GPIO_0=0,
    GPIO_1,
    GPIO_2,
    GPIO_3,            
    GPIO_4,
    GPIO_5,
    GPIO_6,
    GPIO_7,            
    GPIO_8,
    GPIO_9,
    GPIO_10,
    GPIO_11,            
    GPIO_12,
    GPIO_13,
    GPIO_14,
    GPIO_15,
	  NOT_CON
} exp_gpio_pin_name;   

typedef enum {
    INPUT = 0,
    OUTPUT,
    NOT_CONNECTED
} exp_gpio_pin_direction;


/* Classes -------------------------------------------------------------------*/

/**
 * Class representing a single stmpe1600 GPIO expander output pin
 */
class STMPE1600DigiOut {
public: 
    /** Constructor
     * @param[in] &i2c device I2C to be used for communication
     * @param[in] outpinname the desired out pin name to be created
     * @param[in] DevAddr the stmpe1600 I2C device addres (deft STMPE1600_DEF_DEVICE_ADDRESS)
     * @param[in] lvl the default ot pin level  
     */ 
	    STMPE1600DigiOut (DevI2C &i2c, exp_gpio_pin_name outpinname, uint8_t DevAddr=STMPE1600_DEF_DEVICE_ADDRESS, bool lvl=STMPE1600_DEF_DIGIOUT_LVL):
    _dev_i2c(i2c),
    _expdevaddr(DevAddr),
    _exppinname(outpinname) 
    {
        uint8_t data[2];				
        if (_exppinname == NOT_CON) {
            return;
        }
        /* set the _exppinname as output */
        _dev_i2c.i2c_read(data, _expdevaddr, GPDR_0_7, 1);
        _dev_i2c.i2c_read(&data[1], _expdevaddr, GPDR_8_15, 1);			
        *(uint16_t*)data = *(uint16_t*)data | (1<<(uint16_t)_exppinname);  // set gpio as out 			
        _dev_i2c.i2c_write(data, _expdevaddr, GPDR_0_7, 1);
        _dev_i2c.i2c_write(&data[1], _expdevaddr, GPDR_8_15, 1);			
        write (lvl);
    }   

  	/**
  	 * @brief       Write on the out pin
  	 * @param[in]   lvl level to write
  	 * @return      0 on Success
  	 */			
    void write (int lvl) 
    {
        uint8_t data[2];			
			  if (_exppinname == NOT_CON) return;			
        /* set the _exppinname state to lvl */
        _dev_i2c.i2c_read(data, _expdevaddr, GPSR_0_7, 2);
        *(uint16_t*)data = *(uint16_t*)data & (uint16_t)(~(1<<(uint16_t)_exppinname));  // set pin mask 			
        if (lvl) *(uint16_t*)data = *(uint16_t*)data | (uint16_t)(1<<(uint16_t)_exppinname);
        _dev_i2c.i2c_write(data, _expdevaddr, GPSR_0_7, 2);
    }

  	/**
  	 * @brief       Overload assignement operator
  	 */					
    STMPE1600DigiOut& operator=(int lvl)
    {
        write (lvl);
        return *this;
    }		
		
private:
    DevI2C &_dev_i2c;
    uint8_t _expdevaddr;
    exp_gpio_pin_name _exppinname; 	
};

/* Classes -------------------------------------------------------------------*/
/** Class representing a single stmpe1600 GPIO expander input pin
 */
class STMPE1600DigiIn 
{	
public:
    /** Constructor
     * @param[in] &i2c device I2C to be used for communication
     * @param[in] inpinname the desired input pin name to be created
     * @param[in] DevAddr the stmpe1600 I2C device addres (deft STMPE1600_DEF_DEVICE_ADDRESS)
     */ 
    STMPE1600DigiIn (DevI2C &i2c, exp_gpio_pin_name inpinname, uint8_t DevAddr=STMPE1600_DEF_DEVICE_ADDRESS): _dev_i2c(i2c), _expdevaddr(DevAddr), _exppinname(inpinname) 
    {
        uint8_t data[2];
        if (_exppinname == NOT_CON) return;			
        /* set the _exppinname as input pin direction */
        _dev_i2c.i2c_read(data, _expdevaddr, GPDR_0_7, 2);
        *(uint16_t*)data = *(uint16_t*)data & (uint16_t)(~(1<<(uint16_t) _exppinname));  // set gpio as in			
        _dev_i2c.i2c_write(data, _expdevaddr, GPDR_0_7, 2);
    }         

  	/**
  	 * @brief       Read the input pin
  	 * @return      The pin logical state 0 or 1
  	 */			
    bool read () {
        uint8_t data[2];
        if (_exppinname == NOT_CON) {
            return 0;						
        }

        /* read the _exppinname */
        _dev_i2c.i2c_read(data, _expdevaddr, GPMR_0_7, 2);
        *(uint16_t*)data = *(uint16_t*)data & (uint16_t)(1<<(uint16_t)_exppinname);  // mask the in gpio

        if (data[0] || data[1]) {
            return 1;
        }
        return 0;
    }
		
    operator int() {		
        return read();
    }		
		
private:
    DevI2C &_dev_i2c; 
    uint8_t _expdevaddr;
    exp_gpio_pin_name _exppinname;      
};


/* Classes -------------------------------------------------------------------*/

/**
 * Class representing a whole stmpe1600 component (16 gpio)
 */
class STMPE1600 {
public: 
    /** Constructor
    * @param[in] &i2c device I2C to be used for communication
    * @param[in] DevAddr the stmpe1600 I2C device addres (deft STMPE1600_DEF_DEVICE_ADDRESS)
    */ 
    STMPE1600 (DevI2C &i2c, uint8_t DevAddr=STMPE1600_DEF_DEVICE_ADDRESS ) : _dev_i2c(i2c)
    { 
        _dev_i2c = i2c;								
        _expdevaddr = DevAddr;
        write_sys_ctrl (SOFT_RESET);
			
        _gpdro_15 = (uint16_t)0;	// gpio dir all IN
        write_16_bit_reg (GPDR_0_7, &_gpdro_15);			
        _gpsro_15 = (uint16_t)0x0ffff;  // gpio status all 1
        write_16_bit_reg (GPSR_0_7, &_gpsro_15);			
    }

  	/**
  	 * @brief       Write the SYS_CTRL register 
  	 * @param[in]   Data to be written (bit fields)
  	 */		
    void write_sys_ctrl (uint8_t data)     // data = SOFT_RESET reset the device
    {
        _dev_i2c.i2c_write((uint8_t*)SYS_CTRL, _expdevaddr, data, 1);
    }
      
  	/**
  	 * @brief       Set the out pin
  	 * @param[in]   The pin name
  	 * @return      0 on Success
  	 */			
  	bool set_gpio (exp_gpio_pin_name pin_name) 
  	{
  		  if (pin_name == NOT_CON) return true;			
  		  _gpsro_15 = _gpsro_15 | ((uint16_t)0x0001<<pin_name);
  		  write_16_bit_reg (GPSR_0_7 , &_gpsro_15);
  		  return false;
  	}
  	
  	/**
  	 * @brief       Clear the out pin
  	 * @param[in]   The pin name
  	 * @return      0 on Success
  	 */			
  	bool clr_gpio (exp_gpio_pin_name pin_name) 
  	{
  		  if (pin_name == NOT_CON) return true;			
  		  _gpsro_15 = _gpsro_15 & (~((uint16_t)0x0001<<pin_name));
  		  write_16_bit_reg (GPSR_0_7 , &_gpsro_15);
  		  return false;
  	}		
  	
  	/**
  	 * @brief       Read the input pin
  	 * @param[in]   The pin name
  	 * @return      The logical pin level
  	 */					
  	bool rd_gpio (exp_gpio_pin_name pin_name) 
  	{				
  		  uint16_t gpmr0_15;
  		  if (pin_name == NOT_CON) return true;
  		  read_16_bit_reg (GPMR_0_7, &gpmr0_15);
  		  gpmr0_15 = gpmr0_15 & ((uint16_t)0x0001<<pin_name);
  		  if (gpmr0_15) {
            return true;
        }
  		  return false;			
  	}
	
  	/**
  	 * @brief       Set the pin direction
  	 * @param[in]   The pin name
  	 * @param[in]   The pin direction	 
  	 * @return      0 on success
  	 */
  	bool set_gpio_dir (exp_gpio_pin_name pin_name, exp_gpio_pin_direction pin_dir) 
  	{
        if (pin_name == NOT_CON || pin_dir == NOT_CONNECTED) {
            return true;
        }
        _gpdro_15 = _gpdro_15 & (~((uint16_t)0x0001<<pin_name));  // clear the Pin
        _gpdro_15 = _gpdro_15 | ((uint16_t)pin_dir<<pin_name);
        write_16_bit_reg (GPDR_0_7 , &_gpdro_15);
        return false;
  	}

  	/**
  	 * @brief       Read a 16 bits register
  	 * @param[in]   The register address
  	 * @param[in]   The pointer to the read data
  	 */					
    void read_16_bit_reg (uint8_t reg_16_addr, uint16_t *reg_16_data)
    {
        _dev_i2c.i2c_read((uint8_t*)reg_16_data, _expdevaddr, reg_16_addr, 2);	
    }				

  	/**
  	 * @brief       Write a 16 bits register
  	 * @param[in]   The register address
  	 * @param[in]   The pointer to the data to be written
  	 */							
    void write_16_bit_reg (uint8_t reg_16_addr, uint16_t *reg_16_data)
    {
        _dev_i2c.i2c_write((uint8_t*)reg_16_data, _expdevaddr, reg_16_addr, 2);	
    }		

private:					
    DevI2C &_dev_i2c; 	 
    uint16_t _gpdro_15;   // local copy of bit direction reg 
    uint16_t _gpsro_15;   // local copy of bit status reg 
    uint8_t _expdevaddr; // expander device i2c addr
};

#endif // __STMPE1600_CLASS