improve layer switching
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					 21 changed files with 290 additions and 229 deletions
				
			
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			@ -6,16 +6,13 @@
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#include <avr/pgmspace.h>
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#include "usb_keyboard.h"
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#include "usb_keycodes.h"
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#include "matrix.h"
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "keymap.h"
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#include "controller.h"
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#include "keymap_skel.h"
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#define FN_KEYCODE(fn) (pgm_read_byte(&fn_keycode[(fn)]))
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#define FN_LAYER(fn)   (pgm_read_byte(&fn_layer[(fn)]))
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#define KEYCODE(layer, row, col) (pgm_read_byte(&keymaps[(layer)][(row)][(col)]))
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#define KEYMAP( \
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    R3C1, R3C0, R0C0, R1C0, R1C1, R2C0, R2C1, R4C0, R4C1, R6C0, R6C1, R7C0, R7C1, R5C0, R5C1, \
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    R3C2, R0C1, R0C2, R1C3, R1C2, R2C3, R2C2, R4C2, R4C3, R6C2, R6C3, R7C3, R7C2, R5C2, \
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			@ -34,9 +31,7 @@
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    { R7C0, R7C1, R7C2, R7C3, R7C4, R7C5, R7C6, KB_NO } \
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}
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static int current_layer = 0;
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static bool layer_used = false;
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#define KEYCODE(layer, row, col) (pgm_read_byte(&keymaps[(layer)][(row)][(col)]))
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/* layer to change into while Fn key pressed */ 
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			@ -153,76 +148,22 @@ static const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
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};
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uint8_t keymap_get_keycode(int row, int col)
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uint8_t keymap_get_keycode(uint8_t layer, uint8_t row, uint8_t col)
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{
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    return keymap_get_keycodel(current_layer, row, col);
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    return KEYCODE(layer, row, col);
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}
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uint8_t keymap_get_keycodel(int layer, int row, int col)
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int keymap_fn_layer(uint8_t fn_bits)
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{
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    uint8_t code = KEYCODE(layer, row, col);
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    // normal key or mouse key
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    if (IS_KEY(code) || IS_MOUSE(code))
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        layer_used = true;
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    return code;
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    return pgm_read_byte(&fn_layer[biton(fn_bits)]);
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}
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inline
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int keymap_get_layer(void)
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uint8_t keymap_fn_keycode(uint8_t fn_bits)
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{
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    return current_layer;
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    return pgm_read_byte(&fn_keycode[(biton(fn_bits))]);
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}
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inline
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int keymap_set_layer(int layer)
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{
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    current_layer = layer;
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    return current_layer;
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}
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inline
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bool keymap_is_special_mode(uint8_t fn_bits)
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{
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    return (keyboard_modifier_keys == (BIT_LCTRL | BIT_LSHIFT | BIT_LALT | BIT_LGUI));
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}
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void keymap_fn_proc(uint8_t fn_bits)
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{
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    // layer switching
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    static uint8_t last_bits = 0;
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    static uint8_t last_mod = 0;
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    if (usb_keyboard_has_key() || fn_bits == last_bits) {
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        // do nothing during press other than Fn key 
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        return;
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    } else if (fn_bits == 0) {
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        // send key when Fn key is released without using the layer
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        if (!layer_used) {
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            uint8_t code = FN_KEYCODE(biton(last_bits));
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            if (code != KB_NO) {
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                if (IS_MOD(code)) {
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                    keyboard_modifier_keys = last_mod | 1<<(code & 0x07);
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                } else {
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                    keyboard_keys[0] = code;
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                    keyboard_modifier_keys = last_mod;
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                }
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                usb_keyboard_send();
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                usb_keyboard_print();
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                usb_keyboard_clear();
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            }
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        }
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        last_bits = 0;
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        last_mod = 0;
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        layer_used = false;
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        keymap_set_layer(0); // default layer
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    } else if ((fn_bits & (fn_bits - 1)) == 0) {
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        // switch layer when just one Fn Key is pressed
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        last_bits = fn_bits;
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        last_mod = keyboard_modifier_keys;
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        layer_used = false;
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        keymap_set_layer(FN_LAYER(biton(fn_bits)));
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        debug("layer: "); phex(current_layer); debug("(");
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        debug_bin(last_bits); debug(")\n");
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        debug("last_mod: "); debug_hex(last_mod); debug("\n");
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    }
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}
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