[Keyboard] Added ymdk split64 based on walston's work (#9183)

* Added ymdk split64 based on walson's work

* Commented out features on walston's keymap as it was too big to compile

* Update keyboards/ymdk_sp64/config.h

* Update keyboards/ymdk_sp64/keymaps/daed/keymap.c

* Update keyboards/ymdk_sp64/matrix.c

* Update keyboards/ymdk_sp64/matrix.c

* Update keyboards/ymdk_sp64/matrix.c

* keymap changes

* Update keyboards/ymdk_sp64/matrix.c

* Update keyboards/ymdk_sp64/matrix.c

* Update keyboards/ymdk_sp64/rules.mk

* Update keyboards/ymdk_sp64/config.h

* Update keyboards/ymdk_sp64/config.h

* Update keyboards/ymdk_sp64/readme.md

* Update keyboards/ymdk_sp64/rules.mk

* Update keyboards/ymdk_sp64/config.h

* Update keyboards/ymdk_sp64/rules.mk

* Update keyboards/ymdk_sp64/ymdk_sp64.c

* Update keyboards/ymdk_sp64/keymaps/walston/rules.mk

* Update keyboards/ymdk_sp64/readme.md

* Made requested changes and moved keyboard under ymdk directory

* Update keyboards/ymdk/ymdk_sp64/keymaps/walston/keymap.c

* Update keyboards/ymdk/ymdk_sp64/config.h

* Update keyboards/ymdk/ymdk_sp64/config.h

* Update keyboards/ymdk/ymdk_sp64/keymaps/default/keymap.c

* Update keyboards/ymdk/ymdk_sp64/keymaps/default/keymap.c

* updated changes for pr 9183

* updated changes for pr 9183

* updated changes for pr 9183

* Removed redundant "QMK_KEYBOARD_H" include

1 files changed, 169 insertions, 0 deletions

diff --git a/keyboards/ymdk/sp64/matrix.c b/keyboards/ymdk/sp64/matrix.c
new file mode 100644
index 000000000..8dd2bb8d7
--- /dev/null
+++ b/keyboards/ymdk/sp64/matrix.c
@@ -0,0 +1,169 @@
+/*
+Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
+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/>.
+*/
+
+#include "matrix.h"
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include "wait.h"
+#include "action_layer.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "sp64.h"
+#include "debounce.h"
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+
+// Debouncing: store for each key the number of scans until it's eligible to
+// change.  When scanning the matrix, ignore any changes in keys that have
+// already changed in the last DEBOUNCE scans.
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static void matrix_select_row(uint8_t row);
+
+#ifdef RIGHT_HALF
+static uint8_t mcp23018_reset_loop = 0;
+#endif
+
+void matrix_init(void)
+{
+  // all outputs for rows high
+  DDRB = 0xFF;
+  PORTB = 0xFF;
+  // all inputs for columns
+  DDRA = 0x00;
+  DDRC &= ~(0x111111<<2);
+  DDRD &= ~(1<<PIND7);
+  // all columns are pulled-up
+  PORTA = 0xFF;
+  PORTC |= (0b111111<<2);
+  PORTD |= (1<<PIND7);
+
+#ifdef RIGHT_HALF
+  // initialize row and col
+  mcp23018_status = init_mcp23018();
+#endif
+
+  // initialize matrix state: all keys off
+  for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+    matrix[row] = 0;
+    matrix_debouncing[row] = 0;
+  }
+  debounce_init(MATRIX_ROWS);
+  matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void)
+{
+#ifdef RIGHT_HALF
+  // Then the keyboard
+  if (mcp23018_status != I2C_STATUS_SUCCESS) {
+    if (++mcp23018_reset_loop == 0) {
+      // if (++mcp23018_reset_loop >= 1300) {
+      // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
+      // this will be approx bit more frequent than once per second
+      print("trying to reset mcp23018\n");
+      mcp23018_status = init_mcp23018();
+      if (mcp23018_status) {
+        print("left side not responding\n");
+      } else {
+        print("left side attached\n");
+      }
+    }
+  }
+#endif
+  bool changed = false;
+  for (uint8_t row = 0; row < MATRIX_ROWS; row++)
+  {
+    matrix_row_t cols;
+
+    matrix_select_row(row);
+#ifndef RIGHT_HALF
+    _delay_us(5);
+#endif
+
+    cols = (
+      // cols 0..7, PORTA 0 -> 7
+      (~PINA) & 0xFF
+    );
+
+#ifdef RIGHT_HALF
+    uint8_t data = 0x7F;
+    // Receive the columns from right half
+    i2c_receive(I2C_ADDR_WRITE, &data, 1, MCP23018_I2C_TIMEOUT);
+    cols |= ((~(data) & 0x7F) << 7);
+#endif
+
+    if (matrix_debouncing[row] != cols) {
+      matrix_debouncing[row] = cols;
+      //debouncing = DEBOUNCE;
+      changed = true;
+    }
+  }
+
+  debounce(matrix_debouncing, matrix, MATRIX_ROWS, changed);
+
+  matrix_scan_quantum();
+
+#ifdef DEBUG_MATRIX
+  for (uint8_t c = 0; c < MATRIX_COLS; c++)
+    for (uint8_t r = 0; r < MATRIX_ROWS; r++)
+      if (matrix_is_on(r, c)) xprintf("r:%d c:%d \n", r, c);
+#endif
+
+  return (uint8_t)changed;
+}
+
+inline
+matrix_row_t matrix_get_row(uint8_t row)
+{
+    return matrix[row];
+}
+
+void matrix_print(void)
+{
+  print("\nr/c 0123456789ABCDEF\n");
+  for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+    phex(row); print(": ");
+    pbin_reverse16(matrix_get_row(row));
+    print("\n");
+  }
+}
+
+uint8_t matrix_key_count(void)
+{
+  uint8_t count = 0;
+  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+    count += bitpop16(matrix[i]);
+  }
+  return count;
+}
+
+static void matrix_select_row(uint8_t row)
+{
+#ifdef RIGHT_HALF
+  uint8_t txdata[3];
+
+  //Set the remote row on port A
+  txdata[0] = GPIOA;
+  txdata[1] = 0xFF & ~(1<<row);
+  mcp23018_status = i2c_transmit(I2C_ADDR_WRITE, (uint8_t *)txdata, 2, MCP23018_I2C_TIMEOUT);
+#endif
+
+  // select other half
+  DDRB = (1 << row);
+  PORTB = ~(1 << row);
+}