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-rw-r--r--keyboards/lz/erghost/matrix.c344
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diff --git a/keyboards/lz/erghost/matrix.c b/keyboards/lz/erghost/matrix.c
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+/*
+Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
+Copyright 2019 Evy Dekkers
+
+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 "gpio.h"
+
+static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+
+/* Cols 0 - 16
+ * These columns use two 74HC138 3 to 8 bit demultiplexer. B0, F1 is the enable pin, must be set high (1) to use it.
+ *
+ * col / pin: PB5 PB7 PF0 PB0 PF1 PE6
+ * 0: 0 ── 0 ── 0 1 ── 0 0
+ * ────────────────────────────────────────────
+ * 1: 0 ── 0 ── 1 1 ── 0 0
+ * ────────────────────────────────────────────
+ * 2: 0 ── 1 ── 0 1 ── 0 0
+ * ────────────────────────────────────────────
+ * 3: 0 ── 1 ── 1 1 ── 0 0
+ * ────────────────────────────────────────────
+ * 4: 1 ── 0 ── 0 1 ── 0 0
+ * ────────────────────────────────────────────
+ * 5: 1 ── 0 ── 1 1 ── 0 0
+ * ────────────────────────────────────────────
+ * 6: 1 ── 1 ── 0 1 ── 0 0
+ * ────────────────────────────────────────────
+ * 7: 1 ── 1 ── 1 1 ── 0 0
+ * ────────────────────────────────────────────
+ * 8: 0 ── 0 ── 0 0 ── 1 0
+ * ────────────────────────────────────────────
+ * 9: 0 ── 0 ── 1 0 ── 1 0
+ * ────────────────────────────────────────────
+ *10: 0 ── 1 ── 0 0 ── 1 0
+ * ────────────────────────────────────────────
+ *11: 0 ── 1 ── 1 0 ── 1 0
+ * ────────────────────────────────────────────
+ *12: 1 ── 0 ── 0 0 ── 1 0
+ * ────────────────────────────────────────────
+ *13: 1 ── 0 ── 1 0 ── 1 0
+ * ────────────────────────────────────────────
+ *14: 1 ── 1 ── 1 0 ── 1 0
+ * ────────────────────────────────────────────
+ *15: 1 ── 1 ── 0 0 ── 1 0
+ * ────────────────────────────────────────────
+ *16: 0 ── 0 ── 0 0 ── 0 1
+ *
+ */
+static void select_col(uint8_t col) {
+ switch (col) {
+ case 0:
+ writePinLow(B5);
+ writePinLow(B7);
+ writePinLow(F0);
+ writePinHigh(B0);
+ break;
+ case 1:
+ writePinLow(B5);
+ writePinLow(B7);
+ writePinHigh(F0);
+ writePinHigh(B0);
+ break;
+ case 2:
+ writePinLow(B5);
+ writePinHigh(B7);
+ writePinLow(F0);
+ writePinHigh(B0);
+ break;
+ case 3:
+ writePinLow(B5);
+ writePinHigh(B7);
+ writePinHigh(F0);
+ writePinHigh(B0);
+ break;
+ case 4:
+ writePinHigh(B5);
+ writePinLow(B7);
+ writePinLow(F0);
+ writePinHigh(B0);
+ break;
+ case 5:
+ writePinHigh(B5);
+ writePinLow(B7);
+ writePinHigh(F0);
+ writePinHigh(B0);
+ break;
+ case 6:
+ writePinHigh(B5);
+ writePinHigh(B7);
+ writePinLow(F0);
+ writePinHigh(B0);
+ break;
+ case 7:
+ writePinHigh(B5);
+ writePinHigh(B7);
+ writePinHigh(F0);
+ writePinHigh(B0);
+ break;
+ case 8:
+ writePinLow(B5);
+ writePinLow(B7);
+ writePinLow(F0);
+ writePinHigh(F1);
+ break;
+ case 9:
+ writePinLow(B5);
+ writePinLow(B7);
+ writePinHigh(F0);
+ writePinHigh(F1);
+ break;
+ case 10:
+ writePinLow(B5);
+ writePinHigh(B7);
+ writePinLow(F0);
+ writePinHigh(F1);
+ break;
+ case 11:
+ writePinLow(B5);
+ writePinHigh(B7);
+ writePinHigh(F0);
+ writePinHigh(F1);
+ break;
+ case 12:
+ writePinHigh(B5);
+ writePinLow(B7);
+ writePinLow(F0);
+ writePinHigh(F1);
+ break;
+ case 13:
+ writePinHigh(B5);
+ writePinLow(B7);
+ writePinHigh(F0);
+ writePinHigh(F1);
+ break;
+ case 14:
+ writePinHigh(B5);
+ writePinHigh(B7);
+ writePinHigh(F0);
+ writePinHigh(F1);
+ break;
+ case 15:
+ writePinHigh(B5);
+ writePinHigh(B7);
+ writePinLow(F0);
+ writePinHigh(F1);
+ break;
+ case 16:
+ writePinLow(E6);
+ break;
+ }
+}
+
+static void unselect_col(uint8_t col) {
+ switch (col) {
+ case 0:
+ writePinHigh(B5);
+ writePinHigh(B7);
+ writePinHigh(F0);
+ writePinLow(B0);
+ break;
+ case 1:
+ writePinHigh(B5);
+ writePinHigh(B7);
+ writePinLow(F0);
+ writePinLow(B0);
+ break;
+ case 2:
+ writePinHigh(B5);
+ writePinLow(B7);
+ writePinHigh(F0);
+ writePinLow(B0);
+ break;
+ case 3:
+ writePinHigh(B5);
+ writePinLow(B7);
+ writePinLow(F0);
+ writePinLow(B0);
+ break;
+ case 4:
+ writePinLow(B5);
+ writePinHigh(B7);
+ writePinHigh(F0);
+ writePinLow(B0);
+ break;
+ case 5:
+ writePinLow(B5);
+ writePinHigh(B7);
+ writePinLow(F0);
+ writePinLow(B0);
+ break;
+ case 6:
+ writePinLow(B5);
+ writePinLow(B7);
+ writePinHigh(F0);
+ writePinLow(B0);
+ break;
+ case 7:
+ writePinLow(B5);
+ writePinLow(B7);
+ writePinLow(F0);
+ writePinLow(B0);
+ break;
+ case 8:
+ writePinHigh(B5);
+ writePinHigh(B7);
+ writePinHigh(F0);
+ writePinLow(F1);
+ break;
+ case 9:
+ writePinHigh(B5);
+ writePinHigh(B7);
+ writePinLow(F0);
+ writePinLow(F1);
+ break;
+ case 10:
+ writePinHigh(B5);
+ writePinLow(B7);
+ writePinHigh(F0);
+ writePinLow(F1);
+ break;
+ case 11:
+ writePinHigh(B5);
+ writePinLow(B7);
+ writePinLow(F0);
+ writePinLow(F1);
+ break;
+ case 12:
+ writePinLow(B5);
+ writePinHigh(B7);
+ writePinHigh(F0);
+ writePinLow(F1);
+ break;
+ case 13:
+ writePinLow(B5);
+ writePinHigh(B7);
+ writePinLow(F0);
+ writePinLow(F1);
+ break;
+ case 14:
+ writePinLow(B5);
+ writePinLow(B7);
+ writePinLow(F0);
+ writePinLow(F1);
+ break;
+ case 15:
+ writePinLow(B5);
+ writePinLow(B7);
+ writePinHigh(F0);
+ writePinLow(F1);
+ break;
+ case 16:
+ writePinHigh(E6);
+ break;
+ }
+}
+
+static void unselect_cols(void) {
+ //Native
+ writePinHigh(E6);
+
+ //Demultiplexer
+ writePinLow(B0);
+ writePinLow(F1);
+ writePinHigh(B5);
+ writePinHigh(B7);
+ writePinHigh(F0);
+}
+
+static void init_pins(void) {
+ unselect_cols();
+ for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
+ setPinInputHigh(row_pins[x]);
+ }
+ setPinOutput(B5);
+ setPinOutput(B7);
+ setPinOutput(F0);
+ setPinOutput(B0);
+ setPinOutput(F1);
+ setPinOutput(E6);
+}
+
+static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
+ bool matrix_changed = false;
+
+ // Select col and wait for col selecton to stabilize
+ select_col(current_col);
+ matrix_io_delay();
+
+ // For each row...
+ for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
+ // Store last value of row prior to reading
+ matrix_row_t last_row_value = current_matrix[row_index];
+
+ // Check row pin state
+ if (readPin(row_pins[row_index]) == 0) {
+ // Pin LO, set col bit
+ current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col);
+ } else {
+ // Pin HI, clear col bit
+ current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col);
+ }
+
+ // Determine if the matrix changed state
+ if ((last_row_value != current_matrix[row_index]) && !(matrix_changed)) {
+ matrix_changed = true;
+ }
+ }
+
+ // Unselect col
+ unselect_col(current_col);
+
+ return matrix_changed;
+}
+
+void matrix_init_custom(void) {
+ // initialize key pins
+ init_pins();
+}
+
+bool matrix_scan_custom(matrix_row_t current_matrix[]) {
+ bool changed = false;
+
+ // Set col, read rows
+ for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+ changed |= read_rows_on_col(current_matrix, current_col);
+ }
+
+ return changed;
+}
+
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