Add DataHand keyboard support

keyboards/handwired/datahand/config.h

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+/* Copyright 2017-2019 Nikolaus Wittenstein <nikolaus.wittenstein@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+/* Taken from the DataHand PS/2-USB adaptor. */
+#define VENDOR_ID       0x13BA
+#define PRODUCT_ID      0x0017
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    DataHand
+#define PRODUCT         DataHand
+#define DESCRIPTION     DataHand Teensy++ 2.0 conversion
+
+/* key matrix size */
+#define MATRIX_ROWS 13
+#define MATRIX_COLS 4
+
+#define DIODE_DIRECTION CUSTOM_MATRIX
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCING_DELAY 0
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ */
+#define FORCE_NKRO
+
+/*
+ * Magic Key Options
+ *
+ * Magic keys are hotkey commands that allow control over firmware functions of
+ * the keyboard. They are best used in combination with the HID Listen program,
+ * found here: https://www.pjrc.com/teensy/hid_listen.html
+ *
+ * The options below allow the magic key functionality to be changed. This is
+ * useful if your keyboard/keypad is missing keys and you want magic key support.
+ */
+
+/* key combination for magic key command */
+#define IS_COMMAND() ( \
+    keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)) \
+)
+
+/*
+ * Command/Windows key option
+ *
+ * If you define this, the thumb enter key becomes the Command/Windows key. There's still an enter key on the right
+ * ring finger, so this key is much better utilized as the otherwise nonexistent Command key. I think some newer
+ * DataHands let you remap right ring east as Command, but having it on the thumb is nicer. Comment out this define
+ * to use the original layout.
+ */
+#define DATAHAND_THUMB_RETURN_COMMAND

keyboards/handwired/datahand/datahand.h

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+/* Copyright 2017-2019 Nikolaus Wittenstein <nikolaus.wittenstein@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#pragma once
+
+#include "quantum.h"
+
+/* This a shortcut to help you visually see your layout.
+ * The first section contains all of the arguements; the second converts the arguments into a two-dimensional array.
+ */
+
+/* Each code is three letters
+ * l or r - left or right hand
+ * p, r, m, i, t - pinky, ring finger, middle finger, index finger, thumb
+ * fingers: n, s, e, w, c - north, south, east, west, and center (manual calls this "well" but we already have "west")
+ * thumb:   p, n, c, l, u, k - pad, nail, center, lock (harder center), up, knuckle
+ */
+#define LAYOUT( \
+     lpn,             lrn,             lmn,             lin,                rin,             rmn,             rrn,             rpn,      \
+lpw, lpc, lpe,   lrw, lrc, lre,   lmw, lmc, lme,   liw, lic, lie,      riw, ric, rie,   rmw, rmc, rme,   rrw, rrc, rre,   rpw, rpc, rpe, \
+     lps,             lrs,             lms,             lis,                ris,             rms,             rrs,             rps,      \
+                                                       ltp,    ltn,  rtn,    rtp, \
+                                                           ltc,          rtc, \
+                                                           ltl,          rtl, \
+                                                       ltu,    ltk,  rtk,    rtu) \
+{ \
+  {riw, rin, lpw, lpn},\
+  {ric, rie, lpc, lpe},\
+  {ris, rms, lps, lrs},\
+  {rmw, rmn, lrw, lrn},\
+  {rmc, rme, lrc, lre},\
+  {rrw, rrn, lmw, lmn},\
+  {rrc, rre, lmc, lme},\
+  {rrs, rps, lms, lis},\
+  {rpw, rpn, liw, lin},\
+  {rpc, rpe, lic, lie},\
+  {rtk, rtn, ltk, ltn},\
+  {rtc, rtl, ltc, ltl},\
+  {rtp, rtu, ltp, ltu},\
+}
+
+/* Mode LEDs are active-low on Port B on the Teensy. */
+#define LED_MODE_PORT PORTB
+#define LED_TENKEY    (1<<3)
+#define LED_FN        (1<<4)
+#define LED_NORMAL    (1<<5)
+#define LED_NAS       (1<<6)
+
+/* Lock LEDs are active-low on Port F on the Teensy. */
+#define LED_LOCK_PORT   PORTF
+#define LED_CAPS_LOCK   (1<<4)
+#define LED_MOUSE_LOCK  (1<<5)
+#define LED_NUM_LOCK    (1<<6)
+#define LED_SCROLL_LOCK (1<<7)
+
+
+/* Appendix:
+ * Table based on https://geekhack.org/index.php?topic=12212.msg2059319#msg2059319
+ * Some pin assignments (e.g. for PS/2 I/O) have been fixed.
+ *
+ * Teensy    Datahand     8051   pin     pin      8051    Datahand             Teensy
+ * ------    --------     ----   ---     ---      ----    --------             ------
+ * GND       Mtrx send A  P1.0     1      40      VCC     VCC                  VCC
+ * PB7       Mtrx send B  P1.1     2      39      P0.0    LED RH NAS           PB6
+ * PD0       Mtrx send C  P1.2     3      38      P0.1    LED RH NORM          PB5
+ * PD1       Mtrx send D  P1.3     4      37      P0.2    LED RH FCTN          PB4
+ * PD2       RH rcv 0     P1.4     5      36      P0.3    LED RH 10K           PB3
+ * PD3       RH rcv 1     P1.5     6      35      P0.4    LED RH unused        PB2
+ * PD4       LH rcv 0     P1.6     7      34      P0.5    LED RH unused        PE1
+ * PD5       LH rcv 1     P1.7     8      33      P0.6    LED RH unused        PE0
+ * PD6       Reset button RST      9      32      P0.7    ?                    PE7
+ * PD7       ?            P3.0    10      31      VPP     -                    PE6
+ * PE0       ?            P3.1    11      30      ALE     -                    GND
+ * PE1       kbd data     P3.2    12      29      PSEN    -                    AREF
+ * PC0       ?            P3.3    13      28      P2.7    ?                    PF0
+ * PC1       kbd clk      P3.4    14      27      P2.6    ?                    PF1
+ * PC2       ?            P3.5    15      26      P2.5    ?                    PF2
+ * PC3       RAM          P3.6    16      25      P2.4    ?                    PF3
+ * PC4       RAM          P3.7    17      24      P2.3    LED D15 LH (CAPLK)   PF4
+ * PC5       XTAL2        XTAL2   18      23      P2.2    LED D13 LH (MSELK)   PF5
+ * PC6       XTAL1        XTAL1   19      22      P2.1    LED D6  LH (NUMLK)   PF6
+ * PC7       GND          GND     20      21      P2.0    LED D14 LH (SCRLK)   PF7
+ *
+ * JP3 Pinout
+ * 2 - keyboard data
+ * 3 - keyboard clock
+ *
+ * In order to get the Teensy to work, we need to move pin 1 to a different pin. This is
+ * because on the Teensy pin 1 is ground, but we need to write to pin 1 in order to read
+ * the keyboard matrix. An ideal pin to move it to is VPP (pin 31), because this pin tells
+ * the 8051 whether it should read from external or internal memory. The Teensy doesn't
+ * care about that.
+ *
+ * The easiest way to reassign the pin is to use standoffs. You can check out this thread:
+ * https://geekhack.org/index.php?topic=12212.msg235382#msg235382 for a picture of what
+ * this looks like. Note that in the picture the pin has been reassigned to pin 12. We
+ * don't want to do that because we're going to use that pin to send data over PS/2.
+ *
+ * We could if we wanted also reassign the PS/2 pins to Teensy hardware UART pins, but
+ * that's more work. Instead we'll just bit-bang PS/2 because it's an old, slow protocol
+ * (and because there's already a bit-banged PS/2 host implementation in QMK - we just
+ * need to add the device side).
+ *
+ * So overall, we want the following inputs and outputs:
+ * Outputs:
+ *   Matrix:
+ *     PB7
+ *     PD0
+ *     PD1
+ *     PE6 (moved from pin1, GND)
+ *   LEDs:
+ *     PB3-6
+ *     PF4-7
+ * Inputs:
+ *   Matrix:
+ *     PD2-5
+ * I/Os (start up as inputs):
+ *   PS/2:
+ *     PC1
+ *     PE1
+ */