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/* mbed TM1637 Library, for TM1637 LED controller
 * Copyright (c) 2016, v01: WH, Initial version
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, inclumosig without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUmosiG BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef TM1637_H
#define TM1637_H

// Select one of the testboards for TM1637 LED controller
#include "TM1637_Config.h"

/** An interface for driving TM1637 LED controller
 *
 * @code
 * #include "mbed.h"
 * #include "TM1637.h" 
 * 
 * //DisplayData_t size is 6 bytes (6 grids @ 8 segments)
 * TM1637::DisplayData_t all_str  = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};  
 *
 * // KeyData_t size is 1 bytes  
 * TM1637::KeyData_t keydata; 
 *
 * // TM1637 declaration
 * TM1637 TM1637(p5,p6,p7);
 *
 * int main() {
 *   TM1637.cls(); 
 *   TM1637.writeData(all_str);
 *   wait(1);
 *   TM1637.setBrightness(TM1637_BRT0);
 *   wait(1);
 *   TM1637.setBrightness(TM1637_BRT3);
 *
 *   while (1) {
 *     TM1637.cls(); 
 *     wait(0.5); 
 *     TM1637.writeData(all_str);
 *     wait(0.5);
 *
 *     // Check and read keydata
 *     if (TM1637.getKeys(&keydata)) {
 *       pc.printf("Keydata = 0x%02x\r\n", keydata);
 *
 *       if (keydata == TM1637_SW9_BIT) { //sw9  
 *         TM1637.cls(); 
 *         TM1637.writeData(0xFF, 1);
 *         TM1637.writeData(0xFF, 2);
 *       }  
 *     } // Check keydata
 *   } // while 
 * }
 * @endcode
 */


//TM1637 Display data
#define TM1637_MAX_NR_GRIDS    6
#define TM1637_BYTES_PER_GRID  1

//Significant bits Keymatrix data
//#define TM1638_KEY_MSK      0xFF 

//Memory size in bytes for Display and Keymatrix
#define TM1637_DISPLAY_MEM  (TM1637_MAX_NR_GRIDS * TM1637_BYTES_PER_GRID)
#define TM1637_KEY_MEM         2

//Reserved bits for commands
#define TM1637_CMD_MSK      0xC0

//Data setting commands
#define TM1637_DATA_SET_CMD 0x40
#define TM1637_DATA_WR      0x00
#define TM1637_KEY_RD       0x02
#define TM1637_ADDR_INC     0x00
#define TM1637_ADDR_FIXED   0x04
#define TM1637_MODE_NORM    0x00
#define TM1637_MODE_TEST    0x08

//Address setting commands
#define TM1637_ADDR_SET_CMD 0xC0
#define TM1637_ADDR_MSK     0x07 //0..5

//Display control commands
#define TM1637_DSP_CTRL_CMD 0x80
#define TM1637_BRT_MSK      0x07
#define TM1637_BRT0         0x00 //Pulsewidth 1/16
#define TM1637_BRT1         0x01
#define TM1637_BRT2         0x02
#define TM1637_BRT3         0x03
#define TM1637_BRT4         0x04
#define TM1637_BRT5         0x05
#define TM1637_BRT6         0x06
#define TM1637_BRT7         0x07 //Pulsewidth 14/16

#define TM1637_BRT_DEF      TM1637_BRT3

#define TM1637_DSP_OFF      0x00
#define TM1637_DSP_ON       0x08


//Access to 16 Switches
#define TM1637_SW1_BIT      0xEF
#define TM1637_SW2_BIT      0x6F
#define TM1637_SW3_BIT      0xAF
#define TM1637_SW4_BIT      0x2F
#define TM1637_SW5_BIT      0xCF
#define TM1637_SW6_BIT      0x4F
#define TM1637_SW7_BIT      0x8F
#define TM1637_SW8_BIT      0x0F

#define TM1637_SW9_BIT      0xF7
#define TM1637_SW10_BIT     0x77
#define TM1637_SW11_BIT     0xB7
#define TM1637_SW12_BIT     0x37
#define TM1637_SW13_BIT     0xD7
#define TM1637_SW14_BIT     0x57
#define TM1637_SW15_BIT     0x97
#define TM1637_SW16_BIT     0x17

#define TM1637_SW_NONE      0xFF

/** A class for driving TM1637 LED controller
 *
 * @brief Supports 6 Grids @ 8 Segments. 
 *        Serial bus interface device. 
 */
class TM1637 {
 public:

  /** Datatype for displaydata */
  typedef char DisplayData_t[TM1637_DISPLAY_MEM];

  /** Datatypes for keymatrix data */
  typedef char KeyData_t;
    
 /** Constructor for class for driving TM1637 LED controller
  *
  * @brief Supports 6 Grids @ 8 segments. 
  *        Serial bus interface device. 
  *
  *  @param  PinName mosi Serial bus MOSI pin
  *  @param  PinName miso Serial bus MISO pin  
  *  @param  PinName sclk Serial bus SCLK pin 
  */
  TM1637(PinName mosi, PinName miso, PinName sclk);
      
  /** Clear the screen and locate to 0
   */ 
  void cls();  

  /** Write databyte to TM1637
   *  @param  char data byte written at given address
   *  @param  int address display memory location to write byte
   *  @return none
   */ 
   void writeData(char data, int address); 

   /** Write Display datablock to TM1637
    *  @param  DisplayData_t data Array of TM1637_DISPLAY_MEM (=6) bytes for displaydata
    *  @param  length number bytes to write (valid range 0..(TM1637_MAX_NR_GRIDS * TM1637_BYTES_PER_GRID) (=6), when starting at address 0)  
    *  @param  int address display memory location to write bytes (default = 0) 
    *  @return none
    */ 
    void writeData(DisplayData_t data, int length = (TM1637_MAX_NR_GRIDS * TM1637_BYTES_PER_GRID), int address = 0);

  /** Read keydata block from TM1637
   *  @param  *keydata Ptr to bytes for keydata
   *  @return bool keypress True when at least one key was pressed
   *
   */   
  bool getKeys(KeyData_t *keydata);

  /** Set Brightness
    *
    * @param  char brightness (3 significant bits, valid range 0..7 (1/16 .. 14/16 dutycycle)  
    * @return none
    */
  void setBrightness(char brightness = TM1637_BRT_DEF);
  
  /** Set the Display mode On/off
    *
    * @param bool display mode
    */
  void setDisplay(bool on);
  
  private:  
    DigitalOut _mosi;
    DigitalIn _miso;    
    DigitalOut _sclk;  
    char _display;
    char _bright; 
  
  /** Init the Serial interface and the controller
    * @param  none
    * @return none
    */ 
    void _init();


  /** Generate Start condition for TM1637
    *  @param  none
    *  @return none
    */ 
    void _start();
  
  /** Generate Stop condition for TM1637
    *  @param  none
    *  @return none
    */ 
    void _stop();

  /** Send byte to TM1637
    *  @param  int data
    *  @return none
    */ 
    void _write(int data);

  /** Read byte from TM1637
    *  @param  int senddata
    *  @return read byte 
    */ 
    char _read(int data);

  /** Write command and parameter to TM1637
    *  @param  int cmd Command byte
    *  &Param  int data Parameters for command
    *  @return none
    */ 
    void _writeCmd(int cmd, int data);  
};


#if (CATALEX_TEST == 1) 
// Derived class for TM1637 used in CATALEX display unit
//

#include "Font_7Seg.h"

#define CATALEX_NR_GRIDS  4
#define CATALEX_NR_DIGITS 4
#define CATALEX_NR_UDC    8


/** Constructor for class for driving TM1637 controller as used in CATALEX
  *
  *  @brief Supports 4 Digits of 7 Segments + DP.
  *  
  *  @param  PinName mosi Serial bus MOSI pin
  *  @param  PinName miso Serial bus MISO pin  
  *  @param  PinName sclk Serial bus SCLK pin 
  */
class TM1637_CATALEX : public TM1637, public Stream {
 public:

  /** Enums for Icons */
  //  Grid encoded in 8 MSBs, Icon pattern encoded in 16 LSBs
  enum Icon {
    COL2  = ( 2<<24) | S7_DP2,  /**<  Column 2 */
  };
  
  typedef char UDCData_t[CATALEX_NR_UDC];
  
 /** Constructor for class for driving TM1637 LED controller as used in CATALEX
   *
   * @brief Supports 4 Digits of 7 Segments + DP.
   *  
   *  @param  PinName mosi Serial bus MOSI pin
   *  @param  PinName mis0 Serial bus MISO pin  
   *  @param  PinName sclk Serial bus SCLK pin 
  */
  TM1637_CATALEX(PinName mosi, PinName miso, PinName sclk);

#if DOXYGEN_ONLY
    /** Write a character to the Display
     *
     * @param c The character to write to the display
     */
    int putc(int c);

    /** Write a formatted string to the Display
     *
     * @param format A printf-style format string, followed by the
     *               variables to use in formatting the string.
     */
    int printf(const char* format, ...);   
#endif

     /** Locate cursor to a screen column
     *
     * @param column  The horizontal position from the left, indexed from 0
     */
    void locate(int column);
    
    /** Clear the screen and locate to 0
     * @param bool clrAll Clear Icons also (default = false)
     */
    void cls(bool clrAll = false);

    /** Set Icon
     *
     * @param Icon icon Enums Icon has Grid position encoded in 8 MSBs, Icon pattern encoded in 16 LSBs
     * @return none
     */
    void setIcon(Icon icon);

    /** Clr Icon
     *
     * @param Icon icon Enums Icon has Grid position encoded in 8 MSBs, Icon pattern encoded in 16 LSBs
     * @return none
     */
    void clrIcon(Icon icon);

   /** Set User Defined Characters (UDC)
     *
     * @param unsigned char udc_idx   The Index of the UDC (0..7)
     * @param int udc_data            The bitpattern for the UDC (16 bits)       
     */
    void setUDC(unsigned char udc_idx, int udc_data);


   /** Number of screen columns
    *
    * @param none
    * @return columns
    */
    int columns();   

   /** Write databyte to TM1637
     *  @param  char data byte written at given address
     *  @param  int address display memory location to write byte
     *  @return none
     */ 
    void writeData(char data, int address){
      TM1637::writeData(data, address);
    }        

   /** Write Display datablock to TM1637
    *  @param  DisplayData_t data Array of TM1637_DISPLAY_MEM (=4) bytes for displaydata
    *  @param  length number bytes to write (valid range 0..(CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID) (=4), when starting at address 0)  
    *  @param  int address display memory location to write bytes (default = 0) 
    *  @return none
    */   
    void writeData(DisplayData_t data, int length = (CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID), int address = 0) {
      TM1637::writeData(data, length, address);
    }  

protected:  
    // Stream implementation functions
    virtual int _putc(int value);
    virtual int _getc();

private:
    int _column;
    int _columns;   
    
    DisplayData_t _displaybuffer;
    UDCData_t _UDC_7S; 
};
#endif

#endif