/*
Copyright 2011, 2012, 2013 Jun Wako <wakojun@gmail.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <stdint.h>
#include "keyboard.h"
#include "matrix.h"
#include "keymap.h"
#include "host.h"
#include "led.h"
#include "keycode.h"
#include "timer.h"
#include "print.h"
#include "debug.h"
#include "command.h"
#include "util.h"
#include "sendchar.h"
#include "eeconfig.h"
#include "backlight.h"
#include "action_layer.h"
#ifdef BOOTMAGIC_ENABLE
#   include "bootmagic.h"
#else
#   include "magic.h"
#endif
#ifdef MOUSEKEY_ENABLE
#   include "mousekey.h"
#endif
#ifdef PS2_MOUSE_ENABLE
#   include "ps2_mouse.h"
#endif
#ifdef SERIAL_MOUSE_ENABLE
#   include "serial_mouse.h"
#endif
#ifdef ADB_MOUSE_ENABLE
#   include "adb.h"
#endif
#ifdef RGBLIGHT_ENABLE
#   include "rgblight.h"
#endif
#ifdef STENO_ENABLE
#   include "process_steno.h"
#endif
#ifdef FAUXCLICKY_ENABLE
#   include "fauxclicky.h"
#endif
#ifdef SERIAL_LINK_ENABLE
#   include "serial_link/system/serial_link.h"
#endif
#ifdef VISUALIZER_ENABLE
#   include "visualizer/visualizer.h"
#endif
#ifdef POINTING_DEVICE_ENABLE
#   include "pointing_device.h"
#endif
#ifdef MIDI_ENABLE
#   include "process_midi.h"
#endif
#ifdef HD44780_ENABLE
#   include "hd44780.h"
#endif
#ifdef QWIIC_ENABLE
#   include "qwiic.h"
#endif

#ifdef MATRIX_HAS_GHOST
extern const uint16_t keymaps[][MATRIX_ROWS][MATRIX_COLS];
static matrix_row_t get_real_keys(uint8_t row, matrix_row_t rowdata){
    matrix_row_t out = 0;
    for (uint8_t col = 0; col < MATRIX_COLS; col++) {
        //read each key in the row data and check if the keymap defines it as a real key
        if (pgm_read_byte(&keymaps[0][row][col]) && (rowdata & (1<<col))){
            //this creates new row data, if a key is defined in the keymap, it will be set here
            out |= 1<<col;
        }
    }
    return out;
}

static inline bool popcount_more_than_one(matrix_row_t rowdata)
{
    rowdata &= rowdata-1; //if there are less than two bits (keys) set, rowdata will become zero
    return rowdata;
}

static inline bool has_ghost_in_row(uint8_t row, matrix_row_t rowdata)
{
    /* No ghost exists when less than 2 keys are down on the row.
    If there are "active" blanks in the matrix, the key can't be pressed by the user,
    there is no doubt as to which keys are really being pressed.
    The ghosts will be ignored, they are KC_NO.   */
    rowdata = get_real_keys(row, rowdata);
    if ((popcount_more_than_one(rowdata)) == 0){
        return false;
    }
    /* Ghost occurs when the row shares a column line with other row,
    and two columns are read on each row. Blanks in the matrix don't matter,
    so they are filtered out.
    If there are two or more real keys pressed and they match columns with
    at least two of another row's real keys, the row will be ignored. Keep in mind,
    we are checking one row at a time, not all of them at once.
    */
    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
        if (i != row && popcount_more_than_one(get_real_keys(i, matrix_get_row(i)) & rowdata)){
            return true;
        }
    }
    return false;
}

#endif

void disable_jtag(void) {
// To use PORTF disable JTAG with writing JTD bit twice within four cycles.
#if (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega32U4__))
    MCUCR |= _BV(JTD);
    MCUCR |= _BV(JTD);
#endif
}

/** \brief matrix_setup
 *
 * FIXME: needs doc
 */
__attribute__ ((weak))
void matrix_setup(void) {
}

/** \brief keyboard_set<style>pre { line-height: 125%; margin: 0; }
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span><span class="k">module</span> <span class="n">MYMUL</span><span class="p">(</span><span class="n">A</span><span class="p">,</span> <span class="n">B</span><span class="p">,</span> <span class="n">Y</span><span class="p">);</span>
    <span class="k">parameter</span> <span class="n">WIDTH</span> <span class="o">=</span> <span class="mh">1</span><span class="p">;</span>
    <span class="k">input</span> <span class="p">[</span><span class="n">WIDTH</span><span class="o">-</span><span class="mh">1</span><span class="o">:</span><span class="mh">0</span><span class="p">]</span> <span class="n">A</span><span class="p">,</span> <span class="n">B</span><span class="p">;</span>
    <span class="k">output</span> <span class="kt">reg</span> <span class="p">[</span><span class="n">WIDTH</span><span class="o">-</span><span class="mh">1</span><span class="o">:</span><span class="mh">0</span><span class="p">]</span> <span class="n">Y</span><span class="p">;</span>

    <span class="k">parameter</span> <span class="n">_TECHMAP_CONSTVAL_A_</span> <span class="o">=</span> <span class="n">WIDTH</span><span class="p">&#39;</span><span class="n">bx</span><span class="p">;</span>
    <span class="k">parameter</span> <span class="n">_TECHMAP_CONSTVAL_B_</span> <span class="o">=</span> <span class="n">WIDTH</span><span class="p">&#39;</span><span class="n">bx</span><span class="p">;</span>

    <span class="kt">reg</span> <span class="n">_TECHMAP_FAIL_</span><span class="p">;</span>
    <span class="kt">wire</span> <span class="p">[</span><span class="mh">1023</span><span class="o">:</span><span class="mh">0</span><span class="p">]</span> <span class="n">_TECHMAP_DO_</span> <span class="o">=</span> <span class="s">&quot;proc; clean&quot;</span><span class="p">;</span>

    <span class="k">integer</span> <span class="n">i</span><span class="p">;</span>
    <span class="k">always</span> <span class="p">@</span><span class="o">*</span> <span class="k">begin</span>
    	<span class="n">_TECHMAP_FAIL_</span> <span class="o">&lt;=</span> <span class="mh">1</span><span class="p">;</span>
        <span class="k">for</span> <span class="p">(</span><span class="n">i</span> <span class="o">=</span> <span class="mh">0</span><span class="p">;</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">WIDTH</span><span class="p">;</span> <span class="n">i</span><span class="o">=</span><span class="n">i</span><span class="o">+</span><span class="mh">1</span><span class="p">)</span> <span class="k">begin</span>
            <span class="k">if</span> <span class="p">(</span><span class="n">_TECHMAP_CONSTVAL_A_</span> <span class="o">===</span> <span class="n">WIDTH</span><span class="mi">&#39;d1</span> <span class="o">&lt;&lt;</span> <span class="n">i</span><span class="p">)</span> <span class="k">begin</span>
	        <span class="n">_TECHMAP_FAIL_</span> <span class="o">&lt;=</span> <span class="mh">0</span><span class="p">;</span>
                <span class="n">Y</span> <span class="o">&lt;=</span> <span class="n">B</span> <span class="o">&lt;&lt;</span> <span class="n">i</span><span class="p">;</span>
	    <span class="k">end</span>
            <span class="k">if</span> <span class="p">(</span><span class="n">_TECHMAP_CONSTVAL_B_</span> <span class="o">===</span> <span class="n">WIDTH</span><span class="mi">&#39;d1</span> <span class="o">&lt;&lt;</span> <span class="n">i</span><span class="p">)</span> <span class="k">begin</span>
	        <span class="n">_TECHMAP_FAIL_</span> <span class="o">&lt;=</span> <span class="mh">0</span><span class="p">;</span>
                <span class="n">Y</span> <span class="o">&lt;=</span> <span class="n">A</span> <span class="o">&lt;&lt;</span> <span class="n">i</span><span class="p">;</span>
	    <span class="k">end</span>
	<span class="k">end</span>
    <span class="k">end</span>
<span class="k">endmodule</span>
</pre></div>
</code></pre></td></tr></table>
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