[Keyboard] Update Symmetric70 keyboard prototype (#12707)

* update handwired/symmetric70_proto/matrix.c

* make keyboards/handwired/symmetric70_proto/promicro/

* add symmetric70_proto/debug_config.h, update symmetric70_proto/local_features.mk etc.

  set MATRIX_IO_DELAY macro
    make MTEST=mdelay0  symmetric70_proto/promicro:default:flash
    make MTEST=mdelay1  symmetric70_proto/promicro:default:flash
    make MTEST=mdelay10 symmetric70_proto/promicro:default:flash
    make MTEST=mdelay30 symmetric70_proto/promicro:default:flash
  set DEBUG_MATRIX_SCAN_RATE_ENABLE yes
    make MTEST=scan symmetric70_proto/promicro:default:flash
  set MATRIX_DEBUG_DELAY and MATRIX_IO_DELAY macro
    make MTEST=matrix_debug_delay,mdelay0 symmetric70_proto/promicro:default:flash
  set MATRIX_DEBUG_SCAN
    make MTEST=matrix_debug_scan symmetric70_proto/promicro:default:flash

* add symmetric70_proto/matrix_debug/readme.md

* update symmetric70_proto/matrix_debug/readme.md

* update handwired/symmetric70_proto/readme.md

* update handwired/symmetric70_proto/readme.md

* update handwired/symmetric70_proto/*/readme.md

* add handwired/symmetric70_proto/matrix_fast/

* update handwired/symmetric70_proto/matrix_fast/readme.md

* fix typo in handwired/symmetric70_proto/matrix_fast/readme.md

* update config.h under handwired/symmetric70_proto/promicro

* add Proton C support to handwired/symmetric70_proto

* add handwired/symmetric70_proto/proton_c/readme.md

* add promicro/*/readme.md proton_c/*/readme.md

* update handwired/symmetric70_proto/proton_c/proton_c.c

support MATRIX_IO_DELAY_DEFAULT for testing.

* Added another implementation of 'adaptive_delay'.

* update symmetric70_proto/local_features.mk

* update symmetric70_proto/matrix_fast/gpio_extr.h

* add matrix_output_unselect_delay_ports()

* add MTEST=adaptive_delay_fast option

* update symmetric70_proto/matrix_debug/readme.md

* update symmetric70_proto/matrix_fast/readme.md

* update symmetric70_proto/matrix_debug/readme.md

* Erase garbage

* fix symmetric70_proto/proton_c/proton_c.c

* improve adaptive_delay_fast in symmetric70_proto/matrix_debug/matrix.c

* update symmetric70_proto/matrix_debug/readme.md

* fix symmetric70_proto/matrix_debug/readme.md

* Update keyboards/handwired/symmetric70_proto/proton_c/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/handwired/symmetric70_proto/proton_c/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/handwired/symmetric70_proto/local_features.mk

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/local_features.mk

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/matrix.c

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/matrix.c

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/local_features.mk

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/matrix.c

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/readme.md

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/readme.md

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/readme.md

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_fast/matrix_config_expand.c

Co-authored-by: Nick Brassel <nick@tzarc.org>

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Nick Brassel <nick@tzarc.org>

keyboards/handwired/symmetric70_proto/promicro/normal/config.h

@@ -0,0 +1,41 @@
+/*
+Copyright 2021 mtei
+
+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/>.
+*/
+#pragma once
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+ */
+#define MATRIX_ROW_PINS { D4, C6, D7, E6, B4 }
+#define MATRIX_COL_PINS { F4,F4,F5,F5, F6,F6,F7,F7,  B6,B6,B2,B2, B3,B3,B1,B1 }
+
+#define MATRIX_MUL_SEL  {  0, 1, 0, 1,  0, 1, 0, 1,   1, 0, 1, 0,  1, 0, 1, 0 }
+/* use 74HC157: quadruple 2-line to 1-line data selectors / multiplexers */
+#define MATRIX_MUL_SELECT  B5 /* 74HC157 pin1:~A/B */
+
+#ifdef MATRIX_IO_DELAY_ADAPTIVE_FAST
+#    define MATRIX_IO_DELAY_PORTS  B0, B0, F0, F0
+#    define MATRIX_IO_DELAY_MULSEL  0,  1,  0,  1
+//                                  76543210    76543210    76543210    76543210
+#    define MATRIX_IO_DELAY_MASKS 0b01001110, 0b01001110, 0b11110000, 0b11110000
+#endif

keyboards/handwired/symmetric70_proto/promicro/normal/readme.md

@@ -0,0 +1 @@
+[Look here](../readme.md)

keyboards/handwired/symmetric70_proto/promicro/normal/rules.mk

@@ -0,0 +1,6 @@
+CUSTOM_MATRIX = yes
+SRC += matrix_common.c
+SRC += matrix_debug/matrix.c
+
+KEYBOARD_LOCAL_FEATURES_MK := $(dir $(lastword $(MAKEFILE_LIST)))../../local_features.mk
+include $(KEYBOARD_LOCAL_FEATURES_MK)