aboutsummaryrefslogtreecommitdiffstats
path: root/keyboards
diff options
context:
space:
mode:
authorGravatar Drashna Jaelre <drashna@live.com>2018-05-02 08:39:46 -0700
committerGravatar Jack Humbert <jack.humb@gmail.com>2018-05-02 11:39:46 -0400
commite5540dd055b16eaebb28e25e0cb9b314e397e854 (patch)
tree798a05c6335c11ad55231337883003ea248b4df9 /keyboards
parent9b8fc6f1c0129ee119965a2a4d025b0f5c9c613b (diff)
downloadqmk_firmware-e5540dd055b16eaebb28e25e0cb9b314e397e854.tar.gz
Update to drashna keymaps and userspace (#2876)
* Fix Unicode sample * Add irony mark * Remove unpretty keymaps * Add QMK DFU and Conditional Music Mode * Unicode fixes * Unicode fixes * Make layer indication more modular * Finish removing Faux Click * Cleanup of UserSpace and addition of 'update_tri_layer_state' function * Add modifier status indicators to Orthodox * Remove tri layer function * Minor tweaks * Remove the Orthodox's Indicator's reliance on layer_state_set * Add custom EEPROM settings * Make EEPROM config more efficient * Viterbi Config * Add Iris Keyboard layout and Userspace cleanup * Iris keyboard tweaks * Use Grave Escape on Iris * Update Readmes
Diffstat (limited to 'keyboards')
-rw-r--r--keyboards/iris/keymaps/drashna/config.h59
-rw-r--r--keyboards/iris/keymaps/drashna/keymap.c141
-rw-r--r--keyboards/iris/keymaps/drashna/rules.mk11
-rw-r--r--keyboards/orthodox/keymaps/drashna/README.md4
-rw-r--r--keyboards/orthodox/keymaps/drashna/config.h9
-rw-r--r--keyboards/orthodox/keymaps/drashna/keymap.c71
-rw-r--r--keyboards/viterbi/keymaps/drashna/keymap.c2
-rw-r--r--keyboards/viterbi/keymaps/drashna/rules.mk9
8 files changed, 296 insertions, 10 deletions
diff --git a/keyboards/iris/keymaps/drashna/config.h b/keyboards/iris/keymaps/drashna/config.h
new file mode 100644
index 000000000..2a451e7c7
--- /dev/null
+++ b/keyboards/iris/keymaps/drashna/config.h
@@ -0,0 +1,59 @@
+/*
+Copyright 2017 Danny Nguyen <danny@keeb.io>
+
+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/>.
+*/
+
+#ifndef CONFIG_USER_H
+#define CONFIG_USER_H
+
+#include "config_common.h"
+
+/* Use I2C or Serial, not both */
+
+#define USE_SERIAL
+#undef USE_I2C
+
+/* Select hand configuration */
+
+// #define MASTER_LEFT
+// #define MASTER_RIGHT
+#define EE_HANDS
+
+#ifdef RGBLIGHT_ENABLE
+#undef RGBLED_NUM
+#define RGBLED_NUM 16 // Number of LEDs
+#define RGBLIGHT_ANIMATIONS
+#define RGBLIGHT_HUE_STEP 12
+#define RGBLIGHT_SAT_STEP 12
+#define RGBLIGHT_VAL_STEP 12
+#define RGBLIGHT_EFFECT_KNIGHT_LENGTH 2
+#define RGBLIGHT_EFFECT_SNAKE_LENGTH 2
+#define RGBLIGHT_EFFECT_BREATHE_CENTER 1
+#endif // RGBLIGHT_ENABLE
+
+#ifdef AUDIO_ENABLE
+#define C6_AUDIO
+#ifdef RGBLIGHT_ENABLE
+#define NO_MUSIC_MODE
+#endif //RGBLIGHT_ENABLE
+#endif //AUDIO_ENABLE
+
+
+#undef PRODUCT
+#ifdef KEYBOARD_iris_rev2
+#define PRODUCT Drashna Hacked Iris Rev.2
+#endif
+
+#endif
diff --git a/keyboards/iris/keymaps/drashna/keymap.c b/keyboards/iris/keymaps/drashna/keymap.c
new file mode 100644
index 000000000..64d074fc9
--- /dev/null
+++ b/keyboards/iris/keymaps/drashna/keymap.c
@@ -0,0 +1,141 @@
+
+#include QMK_KEYBOARD_H
+#include "drashna.h"
+
+
+#define KC_ALAP ALT_T(KC_APP)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+ [_QWERTY] = LAYOUT_wrapper(
+ KC_GESC, ________________NUMBER_LEFT________________, ________________NUMBER_RIGHT_______________, KC_MINS,
+ KC_TAB , _________________QWERTY_L1_________________, _________________QWERTY_R1_________________, KC_BSLS,
+ KC_C1R3, _________________QWERTY_L2_________________, _________________QWERTY_R2_________________, KC_QUOT,
+ KC_MLSF, _________________QWERTY_L3_________________, KC_ALAP, KC_LGUI, _________________QWERTY_R3_________________, KC_MRSF,
+ LOWER, KC_SPC, KC_BSPC, KC_DEL, KC_ENT, RAISE
+ ),
+ [_COLEMAK] = LAYOUT_wrapper(
+ KC_GESC, ________________NUMBER_LEFT________________, ________________NUMBER_RIGHT_______________, KC_MINS,
+ KC_TAB , _________________COLEMAK_L1________________, _________________COLEMAK_R1________________, KC_BSLS,
+ KC_C1R3, _________________COLEMAK_L2________________, _________________COLEMAK_R2________________, KC_QUOT,
+ KC_MLSF, _________________COLEMAK_L3________________, KC_ALAP, KC_LGUI, _________________COLEMAK_R3________________, KC_MRSF,
+ LOWER, KC_SPC, KC_BSPC, KC_DEL, KC_ENT, RAISE
+ ),
+ [_DVORAK] = LAYOUT_wrapper(
+ KC_GESC, ________________NUMBER_LEFT________________, ________________NUMBER_RIGHT_______________, KC_MINS,
+ KC_TAB , _________________DVORAK_L1_________________, _________________DVORAK_R1_________________, KC_BSLS,
+ KC_C1R3, _________________DVORAK_L2_________________, _________________DVORAK_R2_________________, KC_QUOT,
+ KC_MLSF, _________________DVORAK_L3_________________, KC_ALAP, KC_LGUI, _________________DVORAK_R3_________________, KC_MRSF,
+ LOWER, KC_SPC, KC_BSPC, KC_DEL, KC_ENT, RAISE
+ ),
+ [_WORKMAN] = LAYOUT_wrapper(
+ KC_GESC, ________________NUMBER_LEFT________________, ________________NUMBER_RIGHT_______________, KC_MINS,
+ KC_TAB , _________________WORKMAN_L1________________, _________________WORKMAN_R1________________, KC_BSLS,
+ KC_C1R3, _________________WORKMAN_L2________________, _________________WORKMAN_R2________________, KC_QUOT,
+ KC_MLSF, _________________WORKMAN_L3________________, KC_ALAP, KC_LGUI, _________________WORKMAN_R3________________, KC_MRSF,
+ LOWER, KC_SPC, KC_BSPC, KC_DEL, KC_ENT, RAISE
+ ),
+
+ [_MODS] = LAYOUT(
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ KC_LSFT, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______
+ ),
+
+
+ [_LOWER] = LAYOUT(
+ KC_TILD, KC_EXLM, KC_AT, KC_HASH, KC_DLR, KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_BSPC,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_RBRC, KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE,
+ KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, KC_LPRN, KC_RPRN, _______, KC_LEFT, KC_DOWN, KC_UP, KC_RGHT, _______,
+ _______, _______, KC_DEL, _______, _______, _______
+ ),
+
+ [_RAISE] = LAYOUT(
+ KC_F12, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, KC_LEFT, KC_DOWN, KC_UP, KC_RGHT, KC_UNDS, KC_EQL , KC_MINS, KC_EQL, KC_LBRC, KC_RBRC, KC_BSLS,
+ _______, _______, _______, _______, _______, _______, _______, _______, KC_PLUS, KC_END, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______
+ ),
+
+ [_ADJUST] = LAYOUT(
+ KC_MAKE, KC_RST, EPRM, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ RGB_TOG, RGB_MOD, RGB_HUI, RGB_SAI, RGB_VAI, _______, _______, _______, _______, _______, _______, _______,
+ RGB_SMOD,RGB_HUI, CK_TOGG, AU_ON, AU_OFF, AG_NORM, AG_SWAP, KC_QWERTY, KC_COLEMAK, KC_DVORAK, KC_WORKMAN, TG(_MODS),
+ KC_RGB_T,RGB_SMOD,RGB_HUD, RGB_SAD, RGB_VAD, _______, _______, _______, MG_NKRO, KC_MUTE, KC_VOLD, KC_VOLU, KC_MNXT, KC_MPLY,
+ _______, _______, _______, _______, _______, _______
+ )
+
+};
+
+
+
+#ifdef INDICATOR_LIGHT
+uint32_t layer_state_set_keymap (uint32_t state) {
+ uint8_t modifiders = get_mods();
+ uint8_t led_usb_state = host_keyboard_leds();
+ uint8_t one_shot = get_oneshot_mods();
+
+
+ if (modifiders & MODS_SHIFT_MASK || led_usb_state & (1<<USB_LED_CAPS_LOCK) || one_shot & MODS_SHIFT_MASK) {
+ rgblight_sethsv_at(0, 255, 255, 5);
+ rgblight_sethsv_at(0, 255, 255, 10);
+ }
+ if (modifiders & MODS_CTRL_MASK || one_shot & MODS_CTRL_MASK) {
+ rgblight_sethsv_at(51, 255, 255, 6);
+ rgblight_sethsv_at(51, 255, 255, 9);
+ }
+ if (modifiders & MODS_ALT_MASK || one_shot & MODS_ALT_MASK) {
+ rgblight_sethsv_at(120, 255, 255, 7);
+ rgblight_sethsv_at(120, 255, 255, 8);
+ }
+
+ return state;
+}
+
+
+void matrix_scan_keymap (void) {
+ static uint8_t current_mods;
+ static uint8_t current_host_leds;
+ static uint8_t current_oneshot_mods;
+ static bool has_status_changed = true;
+
+ if ( current_mods != get_mods() || current_host_leds != host_keyboard_leds() || current_oneshot_mods != get_oneshot_mods()) {
+ has_status_changed = true;
+ current_mods = get_mods();
+ current_host_leds = host_keyboard_leds();
+ current_oneshot_mods = get_oneshot_mods();
+ }
+ if (has_status_changed) {
+ has_status_changed = false;
+
+ if (current_mods & MODS_SHIFT_MASK || current_host_leds & (1<<USB_LED_CAPS_LOCK) || current_oneshot_mods & MODS_SHIFT_MASK) {
+ rgblight_sethsv_at(0, 255, 255, 5);
+ rgblight_sethsv_at(0, 255, 255, 10);
+ } else {
+ rgblight_sethsv_default_helper(5);
+ rgblight_sethsv_default_helper(10);
+ }
+ if (current_mods & MODS_CTRL_MASK || current_oneshot_mods & MODS_CTRL_MASK) {
+ rgblight_sethsv_at(51, 255, 255, 6);
+ rgblight_sethsv_at(51, 255, 255, 9);
+ } else {
+ rgblight_sethsv_default_helper(6);
+ rgblight_sethsv_default_helper(9);
+ }
+ if (current_mods & MODS_GUI_MASK || current_oneshot_mods & MODS_GUI_MASK) {
+ rgblight_sethsv_at(120, 255, 255, 7);
+ rgblight_sethsv_at(120, 255, 255, 8);
+ } else {
+ rgblight_sethsv_default_helper(7);
+ rgblight_sethsv_default_helper(8);
+
+ }
+ }
+}
+#endif
+
+
diff --git a/keyboards/iris/keymaps/drashna/rules.mk b/keyboards/iris/keymaps/drashna/rules.mk
new file mode 100644
index 000000000..0e49adf4a
--- /dev/null
+++ b/keyboards/iris/keymaps/drashna/rules.mk
@@ -0,0 +1,11 @@
+BOOTMAGIC_ENABLE = no # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = no # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes # Audio control and System control(+450)
+CONSOLE_ENABLE = no # Console for debug(+400)
+COMMAND_ENABLE = no # Commands for debug and configuration
+TAP_DANCE_ENABLE = no
+RGBLIGHT_ENABLE = yes
+AUDIO_ENABLE = yes
+NKRO_ENABLE = yes
+BACKLIGHT_ENABLE = no
+
diff --git a/keyboards/orthodox/keymaps/drashna/README.md b/keyboards/orthodox/keymaps/drashna/README.md
index c61161774..6c208d2c8 100644
--- a/keyboards/orthodox/keymaps/drashna/README.md
+++ b/keyboards/orthodox/keymaps/drashna/README.md
@@ -21,6 +21,4 @@ All layers have RGB specific indicators, so you can see what layer you're on by
Orthodox Specific Code
----------------------
-Left side is designed to have RGB underglow and Faux Clicking enabled, while the right has Audio enabled.
-
-The make commend ensures that the correct settings are retained.
+Shift, Control and Alt all light up a specific RGB LED for a certain color, based on it's status, adding a visual indicator of OSMs or regular mods are held down.
diff --git a/keyboards/orthodox/keymaps/drashna/config.h b/keyboards/orthodox/keymaps/drashna/config.h
index f8a850394..1c3620616 100644
--- a/keyboards/orthodox/keymaps/drashna/config.h
+++ b/keyboards/orthodox/keymaps/drashna/config.h
@@ -59,8 +59,10 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifdef AUDIO_ENABLE
#define C6_AUDIO
+#ifdef RGBLIGHT_ENABLE
#define NO_MUSIC_MODE
-#endif
+#endif //RGBLIGHT_ENABLE
+#endif //AUDIO_ENABLE
#undef PRODUCT
#ifdef KEYBOARD_orthodox_rev1
@@ -69,4 +71,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#define PRODUCT Drashna Hacked Orthodox Rev.3
#endif
+#define QMK_ESC_OUTPUT D7 // usually COL
+#define QMK_ESC_INPUT D4 // usually ROW
+#define QMK_LED B0
+#define QMK_SPEAKER C6
+
#endif
diff --git a/keyboards/orthodox/keymaps/drashna/keymap.c b/keyboards/orthodox/keymaps/drashna/keymap.c
index ed5f32b98..fd10faa5e 100644
--- a/keyboards/orthodox/keymaps/drashna/keymap.c
+++ b/keyboards/orthodox/keymaps/drashna/keymap.c
@@ -32,7 +32,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#define _______ KC_TRNS
#define XXXXXXX KC_NO
-#define MG_NKRO MAGIC_TOGGLE_NKRO
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
@@ -67,21 +66,85 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
[_LOWER] = LAYOUT(\
KC_TILD, KC_EXLM, KC_AT, KC_HASH, KC_DLR, KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_BSPC,
KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_PGUP, KC_PGDN, KC_HOME, KC_END, _______, KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE,
- KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, _______, _______, _______, _______, _______, _______, _______, _______, KC_COMM, KC_DOT, _______, _______
+ KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, _______, _______, _______, _______, _______, _______, _______, _______, KC_COMM, KC_DOT, _______, _______
),
[_RAISE] = LAYOUT(\
- KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_BSPC,
+ KC_GRV, ________________NUMBER_LEFT________________, ________________NUMBER_RIGHT_______________, KC_BSPC,
_______, _______, _______, _______, _______, _______, KC_PGUP, KC_PGDN, KC_HOME, KC_END, _______, KC_MINS, KC_EQL, KC_LBRC, KC_RBRC, KC_BSLS,
_______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_COMM, KC_DOT, _______, _______
),
[_ADJUST] = LAYOUT(\
KC_MAKE,KC_RESET, EPRM, _______, _______, _______, _______, _______, _______, _______, _______, _______,
- RGB_SMOD,RGB_HUI, CK_TOGG, AUD_ON, AUD_OFF, AG_NORM, _______, _______, _______, _______, AG_SWAP, KC_QWERTY, KC_COLEMAK, KC_DVORAK, KC_WORKMAN, TG(_MODS),
+ RGB_SMOD,RGB_HUI, CK_TOGG, AU_ON, AU_OFF, AG_NORM, _______, _______, _______, _______, AG_SWAP, KC_QWERTY, KC_COLEMAK, KC_DVORAK, KC_WORKMAN, TG(_MODS),
KC_RGB_T,RGB_HUD, MU_ON, MU_OFF, MU_TOG, MU_MOD, _______, _______, _______, _______, _______, _______, MG_NKRO, KC_MUTE, KC_VOLD, KC_VOLU, KC_MNXT, KC_MPLY
)
};
+#ifdef RGBLIGHT_ENABLE
+uint32_t layer_state_set_keymap (uint32_t state) {
+ uint8_t modifiders = get_mods();
+ uint8_t led_usb_state = host_keyboard_leds();
+ uint8_t one_shot = get_oneshot_mods();
+
+
+ if (modifiders & MODS_SHIFT_MASK || led_usb_state & (1<<USB_LED_CAPS_LOCK) || one_shot & MODS_SHIFT_MASK) {
+ rgblight_sethsv_at(0, 255, 255, 5);
+ rgblight_sethsv_at(0, 255, 255, 10);
+ }
+ if (modifiders & MODS_CTRL_MASK || one_shot & MODS_CTRL_MASK) {
+ rgblight_sethsv_at(51, 255, 255, 6);
+ rgblight_sethsv_at(51, 255, 255, 9);
+ }
+ if (modifiders & MODS_ALT_MASK || one_shot & MODS_ALT_MASK) {
+ rgblight_sethsv_at(120, 255, 255, 7);
+ rgblight_sethsv_at(120, 255, 255, 8);
+ }
+
+ return state;
+}
+
+
+void matrix_scan_keymap (void) {
+ static uint8_t current_mods;
+ static uint8_t current_host_leds;
+ static uint8_t current_oneshot_mods;
+ static bool has_status_changed = true;
+
+ if ( current_mods != get_mods() || current_host_leds != host_keyboard_leds() || current_oneshot_mods != get_oneshot_mods()) {
+ has_status_changed = true;
+ current_mods = get_mods();
+ current_host_leds = host_keyboard_leds();
+ current_oneshot_mods = get_oneshot_mods();
+ }
+ if (has_status_changed) {
+ has_status_changed = false;
+
+ if (current_mods & MODS_SHIFT_MASK || current_host_leds & (1<<USB_LED_CAPS_LOCK) || current_oneshot_mods & MODS_SHIFT_MASK) {
+ rgblight_sethsv_at(0, 255, 255, 5);
+ rgblight_sethsv_at(0, 255, 255, 10);
+ } else {
+ rgblight_sethsv_default_helper(5);
+ rgblight_sethsv_default_helper(10);
+ }
+ if (current_mods & MODS_CTRL_MASK || current_oneshot_mods & MODS_CTRL_MASK) {
+ rgblight_sethsv_at(51, 255, 255, 6);
+ rgblight_sethsv_at(51, 255, 255, 9);
+ } else {
+ rgblight_sethsv_default_helper(6);
+ rgblight_sethsv_default_helper(9);
+ }
+ if (current_mods & MODS_GUI_MASK || current_oneshot_mods & MODS_GUI_MASK) {
+ rgblight_sethsv_at(120, 255, 255, 7);
+ rgblight_sethsv_at(120, 255, 255, 8);
+ } else {
+ rgblight_sethsv_default_helper(7);
+ rgblight_sethsv_default_helper(8);
+
+ }
+ }
+}
+#endif
diff --git a/keyboards/viterbi/keymaps/drashna/keymap.c b/keyboards/viterbi/keymaps/drashna/keymap.c
index 78c60d1a6..09e8bc599 100644
--- a/keyboards/viterbi/keymaps/drashna/keymap.c
+++ b/keyboards/viterbi/keymaps/drashna/keymap.c
@@ -67,7 +67,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
),
[_MEDIA] = LAYOUT_ortho_5x7(
- KC_MAKE, KC_RESET,MU_TOG, AUD_ON, AUD_OFF, CK_TOGG, RGB_SAD,
+ KC_MAKE, KC_RESET,MU_TOG, AU_ON, AU_OFF, CK_TOGG, RGB_SAD,
MEDIA, EPRM, KC_RGB_T,RGB_M_P, RGB_M_B, RGB_M_R, RGB_SAI,
RGB_TOG, RGB_MOD, RGB_RMOD,RGB_M_SW,RGB_M_SN,RGB_M_K, RGB_HUD,
KC_MPLY, KC_MPRV, KC_MNXT, RGB_M_X, RGB_M_G, RGB_M_P, RGB_HUI,
diff --git a/keyboards/viterbi/keymaps/drashna/rules.mk b/keyboards/viterbi/keymaps/drashna/rules.mk
index 4dc6bbdac..4b5596a53 100644
--- a/keyboards/viterbi/keymaps/drashna/rules.mk
+++ b/keyboards/viterbi/keymaps/drashna/rules.mk
@@ -8,5 +8,12 @@ RGBLIGHT_ENABLE = yes
AUDIO_ENABLE = yes
NKRO_ENABLE = yes
-CUSTOM_MATRIX = no
+CUSTOM_LAYOUT = no
LAYOUTS = ortho_5x7
+
+# SRC := $(filter-out serial.c matrix.c i2c.c split_util.c,$(SRC))
+# SRC := $(filter-out serial.c,$(SRC))
+# SRC := $(filter-out matrix.c,$(SRC))
+# SRC := $(filter-out i2c.c,$(SRC))
+# SRC := $(filter-out split_util.c,$(SRC))
+# SRC += quantum/matrix.c