/***************************************************************************
 *
 *            Copyright (c) 2006-2007 by CMX Systems, Inc.
 *
 * This software is copyrighted by and is the sole property of
 * CMX.  All rights, title, ownership, or other interests
 * in the software remain the property of CMX.  This
 * software may only be used in accordance with the corresponding
 * license agreement.  Any unauthorized use, duplication, transmission,
 * distribution, or disclosure of this software is expressly forbidden.
 *
 * This Copyright notice may not be removed or modified without prior
 * written consent of CMX.
 *
 * CMX reserves the right to modify this software without notice.
 *
 * CMX Systems, Inc.
 * 12276 San Jose Blvd. #511
 * Jacksonville, FL 32223
 * USA
 *
 * Tel:  (904) 880-1840
 * Fax:  (904) 880-1632
 * http: www.cmx.com
 * email: cmx@cmx.com
 *
 ***************************************************************************/
#include "hid.h"
#include "target.h"
#include "hid_kbd.h"

/****************************************************************************
 ************************** Macro definitions *******************************
 ***************************************************************************/
/* Key scan codes */
#define KEY_NONE                               0x00
#define KEY_ERRORROLLOVER                      0x01
#define KEY_POSTFAIL                           0x02
#define KEY_ERRORUNDEFINED                     0x03
#define KEY_A                                  0x04
#define KEY_B                                  0x05
#define KEY_C                                  0x06
#define KEY_D                                  0x07
#define KEY_E                                  0x08
#define KEY_F                                  0x09
#define KEY_G                                  0x0A
#define KEY_H                                  0x0B
#define KEY_I                                  0x0C
#define KEY_J                                  0x0D
#define KEY_K                                  0x0E
#define KEY_L                                  0x0F
#define KEY_M                                  0x10
#define KEY_N                                  0x11
#define KEY_O                                  0x12
#define KEY_P                                  0x13
#define KEY_Q                                  0x14
#define KEY_R                                  0x15
#define KEY_S                                  0x16
#define KEY_T                                  0x17
#define KEY_U                                  0x18
#define KEY_V                                  0x19
#define KEY_W                                  0x1A
#define KEY_X                                  0x1B
#define KEY_Y                                  0x1C
#define KEY_Z                                  0x1D
#define KEY_1_EXCLAMATION_MARK                 0x1E
#define KEY_2_AT                               0x1F
#define KEY_3_NUMBER_SIGN                      0x20
#define KEY_4_DOLLAR                           0x21
#define KEY_5_PERCENT                          0x22
#define KEY_6_CARET                            0x23
#define KEY_7_AMPERSAND                        0x24
#define KEY_8_ASTERISK                         0x25
#define KEY_9_OPARENTHESIS                     0x26
#define KEY_0_CPARENTHESIS                     0x27
#define KEY_ENTER                              0x28
#define KEY_ESCAPE                             0x29
#define KEY_BACKSPACE                          0x2A
#define KEY_TAB                                0x2B
#define KEY_SPACEBAR                           0x2C
#define KEY_MINUS_UNDERSCORE                   0x2D
#define KEY_EQUAL_PLUS                         0x2E
#define KEY_OBRACKET_AND_OBRACE                0x2F
#define KEY_CBRACKET_AND_CBRACE                0x30
#define KEY_BACKSLASH_VERTICAL_BAR             0x31
#define KEY_NONUS_NUMBER_SIGN_TILDE            0x32
#define KEY_SEMICOLON_COLON                    0x33
#define KEY_SINGLE_AND_DOUBLE_QUOTE            0x34
#define KEY_GRAVE ACCENT AND TILDE             0x35
#define KEY_COMMA_AND_LESS                     0x36
#define KEY_DOT_GREATER                        0x37
#define KEY_SLASH_QUESTION                     0x38
#define KEY_CAPS LOCK                          0x39
#define KEY_F1                                 0x3A
#define KEY_F2                                 0x3B
#define KEY_F3                                 0x3C
#define KEY_F4                                 0x3D
#define KEY_F5                                 0x3E
#define KEY_F6                                 0x3F
#define KEY_F7                                 0x40
#define KEY_F8                                 0x41
#define KEY_F9                                 0x42
#define KEY_F10                                0x43
#define KEY_F11                                0x44
#define KEY_F12                                0x45
#define KEY_PRINTSCREEN                        0x46
#define KEY_SCROLL LOCK                        0x47
#define KEY_PAUSE                              0x48
#define KEY_INSERT                             0x49
#define KEY_HOME                               0x4A
#define KEY_PAGEUP                             0x4B
#define KEY_DELETE                             0x4C
#define KEY_END1                               0x4D
#define KEY_PAGEDOWN                           0x4E
#define KEY_RIGHTARROW                         0x4F
#define KEY_LEFTARROW                          0x50
#define KEY_DOWNARROW                          0x51
#define KEY_UPARROW                            0x52
#define KEY_KEYPAD_NUM_LOCK_AND_CLEAR          0x53
#define KEY_KEYPAD_SLASH                       0x54
#define KEY_KEYPAD_ASTERIKS                    0x55
#define KEY_KEYPAD_MINUS                       0x56
#define KEY_KEYPAD_PLUS                        0x57
#define KEY_KEYPAD_ENTER                       0x58
#define KEY_KEYPAD_1_END                       0x59
#define KEY_KEYPAD_2_DOWN_ARROW                0x5A
#define KEY_KEYPAD_3_PAGEDN                    0x5B
#define KEY_KEYPAD_4_LEFT_ARROW                0x5C
#define KEY_KEYPAD_5                           0x5D
#define KEY_KEYPAD_6_RIGHT_ARROW               0x5E
#define KEY_KEYPAD_7_HOME                      0x5F
#define KEY_KEYPAD_8_UP_ARROW                  0x60
#define KEY_KEYPAD_9_PAGEUP                    0x61
#define KEY_KEYPAD_0_INSERT                    0x62
#define KEY_KEYPAD_DECIMAL_SEPARATOR_DELETE    0x63
#define KEY_NONUS_BACK_SLASH_VERTICAL_BAR      0x64
#define KEY_APPLICATION                        0x65
#define KEY_POWER                              0x66
#define KEY_KEYPAD_EQUAL                       0x67
#define KEY_F13                                0x68
#define KEY_F14                                0x69
#define KEY_F15                                0x6A
#define KEY_F16                                0x6B
#define KEY_F17                                0x6C
#define KEY_F18                                0x6D
#define KEY_F19                                0x6E
#define KEY_F20                                0x6F
#define KEY_F21                                0x70
#define KEY_F22                                0x71
#define KEY_F23                                0x72
#define KEY_F24                                0x73
#define KEY_EXECUTE                            0x74
#define KEY_HELP                               0x75
#define KEY_MENU                               0x76
#define KEY_SELECT                             0x77
#define KEY_STOP                               0x78
#define KEY_AGAIN                              0x79
#define KEY_UNDO                               0x7A
#define KEY_CUT                                0x7B
#define KEY_COPY                               0x7C
#define KEY_PASTE                              0x7D
#define KEY_FIND                               0x7E
#define KEY_MUTE                               0x7F
#define KEY_VOLUME_UP                          0x80
#define KEY_VOLUME_DOWN                        0x81
#define KEY_LOCKING_CAPS_LOCK                  0x82
#define KEY_LOCKING_NUM_LOCK                   0x83
#define KEY_LOCKING_SCROLL_LOCK                0x84
#define KEY_KEYPAD_COMMA                       0x85
#define KEY_KEYPAD_EQUAL_SIGN                  0x86
#define KEY_INTERNATIONAL1                     0x87
#define KEY_INTERNATIONAL2                     0x88
#define KEY_INTERNATIONAL3                     0x89
#define KEY_INTERNATIONAL4                     0x8A
#define KEY_INTERNATIONAL5                     0x8B
#define KEY_INTERNATIONAL6                     0x8C
#define KEY_INTERNATIONAL7                     0x8D
#define KEY_INTERNATIONAL8                     0x8E
#define KEY_INTERNATIONAL9                     0x8F
#define KEY_LANG1                              0x90
#define KEY_LANG2                              0x91
#define KEY_LANG3                              0x92
#define KEY_LANG4                              0x93
#define KEY_LANG5                              0x94
#define KEY_LANG6                              0x95
#define KEY_LANG7                              0x96
#define KEY_LANG8                              0x97
#define KEY_LANG9                              0x98
#define KEY_ALTERNATE_ERASE                    0x99
#define KEY_SYSREQ                             0x9A
#define KEY_CANCEL                             0x9B
#define KEY_CLEAR                              0x9C
#define KEY_PRIOR                              0x9D
#define KEY_RETURN                             0x9E
#define KEY_SEPARATOR                          0x9F
#define KEY_OUT                                0xA0
#define KEY_OPER                               0xA1
#define KEY_CLEAR_AGAIN                        0xA2
#define KEY_CRSEL                              0xA3
#define KEY_EXSEL                              0xA4
#define KEY_KEYPAD_00                          0xB0
#define KEY_KEYPAD_000                         0xB1
#define KEY_THOUSANDS_SEPARATOR                0xB2
#define KEY_DECIMAL_SEPARATOR                  0xB3
#define KEY_CURRENCY_UNIT                      0xB4
#define KEY_CURRENCY_SUB_UNIT                  0xB5
#define KEY_KEYPAD_OPARENTHESIS                0xB6
#define KEY_KEYPAD_CPARENTHESIS                0xB7
#define KEY_KEYPAD_OBRACE                      0xB8
#define KEY_KEYPAD_CBRACE                      0xB9
#define KEY_KEYPAD_TAB                         0xBA
#define KEY_KEYPAD_BACKSPACE                   0xBB
#define KEY_KEYPAD_A                           0xBC
#define KEY_KEYPAD_B                           0xBD
#define KEY_KEYPAD_C                           0xBE
#define KEY_KEYPAD_D                           0xBF
#define KEY_KEYPAD_E                           0xC0
#define KEY_KEYPAD_F                           0xC1
#define KEY_KEYPAD_XOR                         0xC2
#define KEY_KEYPAD_CARET                       0xC3
#define KEY_KEYPAD_PERCENT                     0xC4
#define KEY_KEYPAD_LESS                        0xC5
#define KEY_KEYPAD_GREATER                     0xC6
#define KEY_KEYPAD_AMPERSAND                   0xC7
#define KEY_KEYPAD_LOGICAL_AND                 0xC8
#define KEY_KEYPAD_VERTICAL_BAR                0xC9
#define KEY_KEYPAD_LOGIACL_OR                  0xCA
#define KEY_KEYPAD_COLON                       0xCB
#define KEY_KEYPAD_NUMBER_SIGN                 0xCC
#define KEY_KEYPAD_SPACE                       0xCD
#define KEY_KEYPAD_AT                          0xCE
#define KEY_KEYPAD_EXCLAMATION_MARK            0xCF
#define KEY_KEYPAD_MEMORY_STORE                0xD0
#define KEY_KEYPAD_MEMORY_RECALL               0xD1
#define KEY_KEYPAD_MEMORY_CLEAR                0xD2
#define KEY_KEYPAD_MEMORY_ADD                  0xD3
#define KEY_KEYPAD_MEMORY_SUBTRACT             0xD4
#define KEY_KEYPAD_MEMORY_MULTIPLY             0xD5
#define KEY_KEYPAD_MEMORY_DIVIDE               0xD6
#define KEY_KEYPAD_PLUSMINUS                   0xD7
#define KEY_KEYPAD_CLEAR                       0xD8
#define KEY_KEYPAD_CLEAR_ENTRY                 0xD9
#define KEY_KEYPAD_BINARY                      0xDA
#define KEY_KEYPAD_OCTAL                       0xDB
#define KEY_KEYPAD_DECIMAL                     0xDC
#define KEY_KEYPAD_HEXADECIMAL                 0xDD
#define KEY_LEFTCONTROL                        0xE0
#define KEY_LEFTSHIFT                          0xE1
#define KEY_LEFTALT                            0xE2
#define KEY_LEFT_GUI                           0xE3
#define KEY_RIGHTCONTROL                       0xE4
#define KEY_RIGHTSHIFT                         0xE5
#define KEY_RIGHTALT                           0xE6
#define KEY_RIGHT_GUI                          0xE7

/* Modifier key flags. */
#define MODIFIER_LEFT_CTRL                     BIT0
#define MODIFIER_LEFT_SHIFT                    BIT1
#define MODIFIER_LEFT_ALT                      BIT2
#define MODIFIER_LEFT_GUI                      BIT3
#define MODIFIER_RIGHT_CTRL                    BIT4
#define MODIFIER_RIGHT_SHIFT                   BIT5
#define MODIFIER_RIGHT_ALT                     BIT6
#define MODIFIER_RIGHT_GUI                     BIT7

/* Access in and out report members. These macros assume,
   in and out report have the type uint[]. */
#define REPIN_MODIFIERS(i)    ((i)[0])
#define REPIN_KEYS(i, k)      ((i)[2+(k)])
#define REPOUT_LEDS(o)        ((o)[0])

/* Defines how many keys can be pressed at the same time. */
#define MAX_KEYS_PRESSED      6
/* Add a scan code to the key array. */
#define ADD_KEY(ndx, s)   ((ndx) >= MAX_KEYS_PRESSED ? (kbd_phantom_state(), 1) : (REPIN_KEYS(kbd_in_report, (ndx))=(s), 0))
/****************************************************************************
 ************************** Type definitions ********************************
 ***************************************************************************/
/****************************************************************************
 ************************** Function predefinitions. ************************
 ***************************************************************************/
static void kbd_clear_keys(void);
static void kbd_phantom_state(void);
static hcc_u8 kbd_scan_matrix(void);

#ifdef ON_THE_GO
extern void busy_wait(void);
#else
#define busy_wait()
#endif

/****************************************************************************
 ************************** Global variables ********************************
 ***************************************************************************/
#ifdef ON_THE_GO
extern hcc_u8 device_stp;
#else
static hcc_u8 device_stp=0;
#endif

/****************************************************************************
 ************************** Module variables ********************************
 ***************************************************************************/
static hcc_u8 kbd_in_report[6];

/****************************************************************************
 ************************** Function definitions ****************************
 ***************************************************************************/

/*****************************************************************************
 * Remove all key presses from the out report.
 ****************************************************************************/
static void kbd_clear_keys(void)
{
  int x;
  for (x=0; x<MAX_KEYS_PRESSED; x++)
  {
    REPIN_KEYS(kbd_in_report, x)=KEY_NONE;
  }
}

/*****************************************************************************
 * Remove all key presses from the out report.
 ****************************************************************************/
static void kbd_phantom_state(void)
{
  int x;
  for (x=0; x<MAX_KEYS_PRESSED; x++)
  {
    REPIN_KEYS(kbd_in_report, x)=KEY_ERRORROLLOVER;
  }
}

/*****************************************************************************
 * Scan the key matrix, and add a scan code for each pressed key to the 
 * outpout report.
 ****************************************************************************/
static hcc_u8 kbd_scan_matrix(void)
{
  int x=0;
  hcc_u8 r=0;

  if (SW1_ACTIVE())
  {
    r=BIT0;
    if (ADD_KEY(x, KEY_PAGEUP))
    {
      return(r);
    }
    x++;
  }
  if (SW2_ACTIVE())
  {
    r=BIT1;
    if (ADD_KEY(x, KEY_PAGEDOWN))
    {
      return(r);
    }
    x++;
  }
  while(x < MAX_KEYS_PRESSED)
  {
    ADD_KEY(x, KEY_NONE);
    x++;
  }
  return(r);
}

/*****************************************************************************
 * Hid keyboard main loop.
 ****************************************************************************/
void hid_kbd(void)
{
  hcc_u8 last_state=0;
  hcc_u8 in_report, out_report;

  HID_init(500, 0);

  in_report=hid_add_report(rpt_in, 0, 8);
  out_report=hid_add_report(rpt_out, 0, 1);

  while(!device_stp)
  {
    hcc_u8 cur_state;
  
    hid_process();

    /* Set modifier key status leds if needed. */    
    if (hid_report_pending(out_report))
    {
      hcc_u8 leds;
      hid_read_report(out_report, &leds);
      
      if (leds & 1)
      {
        LED1_ON;
      }
      else
      {
        LED1_OFF;
      }
      
      if (leds & 2)
      {
        LED2_ON;
      }
      else
      {
        LED2_OFF;
      }

      if (leds & 4)
      {
        LED3_ON;
      }
      else
      {
        LED3_OFF;
      }
      
      if (leds & 8)
      {
        LED4_ON;
      }
      else
      {
        LED4_OFF;
      }      
    }
   
    if (!hid_report_pending(in_report))
    {
      /* Look for pressed keys. We do this at the polling rate of the 
         interrupt endpoint (by default 32 mS). This will work as a 
         glitch filter for the switches. */
      cur_state=kbd_scan_matrix();
      
      /* If the status of some keys has been changed, update input
         report.  */
      if (cur_state != last_state)
      {
        hid_write_report(in_report, kbd_in_report);
        last_state=cur_state;
      }
        
    }

    busy_wait();
  }
}
/****************************** END OF FILE **********************************/
