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- #include "keymap_skel.h"
- #include "usb_keyboard.h"
- #include "debug.h"
- #include "timer.h"
- #include "layer.h"
-
- /*
- * Parameters:
- * enter_delay |=======|
- * send_fn_term |================|
- *
- * Fn key processing cases:
- * 1. release Fn after send_fn_term.
- * Layer sw ___________|~~~~~~~~~~~|___
- * Fn press ___|~~~~~~~~~~~~~~~~~~~|___
- * Fn send ___________________________
- *
- * 2. release Fn in send_fn_term.(not layer used)
- * Layer sw ___________|~~~~~~|________
- * Fn press ___|~~~~~~~~~~~~~~|________
- * Fn key send __________________|~|______
- * other key press ___________________________
- * other key send ___________________________
- *
- * 3. release Fn in send_fn_term.(layer used)
- * Layer sw ___________|~~~~~~|________
- * Fn press ___|~~~~~~~~~~~~~~|________
- * Fn key send ___________________________
- * Fn send ___________________________
- * other key press _____________|~~|__________
- * other key send _____________|~~|__________
- *
- * 4. press other key in ENTER_DELAY.
- * Layer sw ___________________________
- * Fn key press ___|~~~~~~~~~|_____________
- * Fn key send ______|~~~~~~|_____________
- * other key press ______|~~~|________________
- * other key send _______|~~|________________
- *
- * 5. press Fn while press other key.
- * Layer sw ___________________________
- * Fn key press ___|~~~~~~~~~|_____________
- * Fn key send ___|~~~~~~~~~|_____________
- * other key press ~~~~~~~|___________________
- * other key send ~~~~~~~|___________________
- *
- * 6. press Fn twice quickly and keep holding down.(repeat)
- * Layer sw ___________________________
- * Fn key press ___|~|____|~~~~~~~~~~~~~~~~
- * Fn key send _____|~|__|~~~~~~~~~~~~~~~~
- */
-
- // LAYER_ENTER_DELAY: prevent from moving new layer
- #define LAYER_ENTER_DELAY 8
-
- // LAYER_SEND_FN_TERM: send keycode if release key in this term
- #define LAYER_SEND_FN_TERM 40
-
-
- static uint8_t current_layer = 0;
- static bool layer_used = false;
-
-
- uint8_t layer_get_keycode(uint8_t row, uint8_t col)
- {
- uint8_t code = keymap_get_keycode(current_layer, row, col);
- // normal key or mouse key
- if ((IS_KEY(code) || IS_MOUSE(code))) {
- layer_used = true;
- }
- return code;
- }
-
- void layer_switching(uint8_t fn_bits)
- {
- // layer switching
- static uint8_t new_layer = 0;
- static uint8_t last_fn = 0;
- static uint8_t last_mods = 0;
- static uint16_t last_timer = 0;
- static uint8_t sent_fn = 0;
-
- if (fn_bits == last_fn) { // Fn key is not changed
- if (current_layer != new_layer) {
- // not switch layer yet
- if (timer_elapsed(last_timer) > LAYER_ENTER_DELAY) {
- debug("Fn case: 1,2,3(switch layer)\n");
- // case: 1,2,3
- current_layer = new_layer;
- debug("timer_elapsed: "); debug_hex16(timer_elapsed(last_timer)); debug("\n");
- debug("switch layer: "); debug_hex(current_layer); debug("\n");
- } else if (usb_keyboard_has_key()) {
- debug("Fn case: 4(send Fn first, then add Fn to report)\n");
- // case: 4
- // send only Fn key first
- usb_keyboard_swap_report();
- usb_keyboard_clear_report();
- usb_keyboard_add_code(keymap_fn_keycode(last_fn));
- usb_keyboard_set_mods(last_mods);
- usb_keyboard_send();
- usb_keyboard_swap_report();
- // add Fn key to send with other keys
- usb_keyboard_add_code(keymap_fn_keycode(last_fn));
-
- new_layer = 0;
- sent_fn = last_fn;
- }
- } else {
- if (fn_bits && new_layer == 0) {
- // case: 4,5,6
- usb_keyboard_add_code(keymap_fn_keycode(last_fn));
- sent_fn = last_fn;
- }
- }
- } else { // Fn key is changed
- if (fn_bits == 0) { // Fn key is released(falling edge)
- if (!layer_used && timer_elapsed(last_timer) < LAYER_SEND_FN_TERM) {
- debug("Fn case: 2(send Fn)\n");
- // case: 2
- usb_keyboard_swap_report();
- usb_keyboard_clear_report();
- usb_keyboard_add_code(keymap_fn_keycode(last_fn));
- usb_keyboard_set_mods(last_mods);
- usb_keyboard_send();
- usb_keyboard_swap_report();
- sent_fn = last_fn;
- }
- debug("Fn case: 1,2,3,4,5,6(return to default layer)\n");
- new_layer = 0;
- current_layer = 0;
- } else { // Fn Key is pressed(rising edge)
- if (usb_keyboard_has_key() ||
- (fn_bits == sent_fn &&timer_elapsed(last_timer) < LAYER_ENTER_DELAY)) {
- debug("Fn case: 5,6(add Fn to repeat)\n");
- usb_keyboard_add_code(keymap_fn_keycode(fn_bits));
- sent_fn = fn_bits;
- } else {
- debug("Fn case: 1,2,3,4(ready for switching layer)\n");
- // ready for switching layer(case: 1,2,3,4)
- new_layer = keymap_fn_layer(fn_bits);
- sent_fn = 0;
- }
- }
- layer_used = false;
- last_fn = fn_bits;
- last_mods = usb_keyboard_mods;
- last_timer = timer_read();
- debug("new_layer: "); debug_hex(new_layer); debug("\n");
- debug("last_fn: "); debug_bin(last_fn); debug("\n");
- debug("last_mods: "); debug_hex(last_mods); debug("\n");
- debug("last_timer: "); debug_hex16(last_timer); debug("\n");
- }
- }
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