mitosis:datagrok add layer select, more layouts (#3835)

* mitosis:datagrok: fix typo'd inconsistent brace arrangement

(thank you @cari66ean)

* mitosis:datagrok: add makefile argument MITOSIS_DATAGROK_SLOWUART

* mitosis:datagrok: return backspace to opposite space, use TT(), more

- move backspace back to its position opposite space
- move del to red+backspace
- move tab back to tap-leftshift
- move printscreen/scrolllock/pause to blue+left pinky column
- use TT() instead of MO() to stick a layer on if wanted
- indentation that my text editor wants
- default to no audio; i can enable it at compile time.

* mitosis:datagrok: modularize features, add default layer rotator key

* mitosis: add MITOSIS_DATAGROK_BOTTOMSPACE makefile argument

* mitosis:datagrok: README improvements; document new features

* mitosis:datagrok: dot. not "number pad dot." in numbers layer

* mitosis:datagrok remove unnecessary _user audio code

* mitosis:datagrok: return to MO() for red/blue, keep TT() for purple

in this way, the LED still updates quickly when red or blue is pressed,
but we can still lock the purple layer on for 10-key numpad operation
with red+tapping blue.

* mitosis:datagrok: add colemak and dvorak default layers

* mitosis:datagrok update readme re: available default layouts

* mitosis: remove unneeded code that was overriding led_set_user

also, add some comments

* mitosis:datagrok: updated led setting code for new layers

also, place into led_set_user where it belongs, not matrix_scan_user.

* mitosis:datagrok: update LEDs when setting the default layer

maybe this should go into default_layer_set?

* mitosis:datagrok update readme with new imgur links + other improvements

* mitosis:datagrok fix typo in image urls

* mitosis:datagrok remove useless #include (ty @drashna)

* mitosis:datagrok undo unnecessary change to quantum/quantum.h

i can put the extern float definition in my own keymap code. (ty @drashna)

* mitosis:datagrok move customized layout to my keymap

no need to modify keyboard-level mitosis.h. (ty @drashna)

* mitosis:datagrok update comment describing my led indicator logic

* datagrok:mitosis update readme to document LED indicator.

1 files changed, 4 insertions, 15 deletions

diff --git a/keyboards/mitosis/mitosis.c b/keyboards/mitosis/mitosis.c
index f965f2a048..1ca7276e41 100644
--- a/keyboards/mitosis/mitosis.c
+++ b/keyboards/mitosis/mitosis.c
@@ -5,13 +5,12 @@ void uart_init(void) {
 }
 
 void led_init(void) {
-	DDRD  |= (1<<1);
-	PORTD |= (1<<1);
-	DDRF  |= (1<<4) | (1<<5);
-	PORTF |= (1<<4) | (1<<5);
+	DDRD  |= (1<<1); // Pin to green, set as output
+	PORTD |= (1<<1); // Turn it off
+	DDRF  |= (1<<4) | (1<<5); // Pins to red and blue, set as output
+	PORTF |= (1<<4) | (1<<5); // Turn them off
 }
 
-
 void matrix_init_kb(void) {
 	// put your keyboard start-up code here
 	// runs once when the firmware starts up
@@ -20,16 +19,6 @@ void matrix_init_kb(void) {
 	led_init();
 }
 
-void matrix_scan_kb(void) {
-	// put your looping keyboard code here
-	// runs every cycle (a lot)
-	matrix_scan_user();
-}
-
-void led_set_kb(uint8_t usb_led) {
-
-}
-
 #ifdef SWAP_HANDS_ENABLE
 __attribute__ ((weak))
 const keypos_t hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {