Add q8_pro

1 files changed, 147 insertions, 0 deletions

diff --git a/keyboards/keychron/q8_pro/matrix.c b/keyboards/keychron/q8_pro/matrix.c
new file mode 100644
index 0000000000..663dae5ff9
--- /dev/null
+++ b/keyboards/keychron/q8_pro/matrix.c
@@ -0,0 +1,147 @@
+/* Copyright 2023 @ Keychron (https://www.keychron.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 "quantum.h"
+
+#define HC595_STCP B0
+#define HC595_SHCP A1
+#define HC595_DS A7
+
+#define DIRECT_COL_NUM 0
+
+pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+
+static inline uint8_t readMatrixPin(pin_t pin) {
+    if (pin != NO_PIN) {
+        return readPin(pin);
+    } else {
+        return 1;
+    }
+}
+
+static inline void setPinOutput_writeLow(pin_t pin) {
+    setPinOutput(pin);
+    writePinLow(pin);
+}
+
+static inline void HC595_initPin(void) {
+    setPinOutput(HC595_DS);
+    setPinOutput(HC595_STCP);
+    setPinOutput(HC595_SHCP);
+}
+
+static inline void HC595_delay(uint16_t n) {
+    while (n-- > 0) {
+        asm volatile("nop" ::: "memory");
+    }
+}
+
+static void HC595_output(uint16_t data, bool bit) {
+    uint8_t n = 1;
+    uint8_t i;
+
+    for (i = 1; i < 16; i++) {
+        if (data & 0x1) {
+            writePinHigh(HC595_DS);
+        } else {
+            writePinLow(HC595_DS);
+        }
+        HC595_delay(n);
+        writePinHigh(HC595_SHCP);
+        HC595_delay(n);
+        writePinLow(HC595_SHCP);
+        if (bit) {
+            break;
+        } else {
+            data >>= 1;
+        }
+    }
+    writePinHigh(HC595_STCP);
+    HC595_delay(n);
+    writePinLow(HC595_STCP);
+}
+
+static void select_col(uint8_t col) {
+    if (col == DIRECT_COL_NUM) {
+        HC595_output(0x0, 1);
+        HC595_output(0x1, 1);
+    }
+}
+
+static void unselect_col(void) {
+    HC595_output(0x1, 1);
+}
+
+static void unselect_cols(void) {
+    HC595_output(0xFFFF, 0);
+}
+
+void select_all_cols(void) {
+    HC595_output(0x0, 0);
+}
+
+static void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col, matrix_row_t row_shifter) {
+    bool key_pressed = false;
+
+    // Select col
+    select_col(current_col);
+    matrix_output_select_delay();
+
+    // For each row...
+    for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
+        // Check row pin state
+        if (readMatrixPin(row_pins[row_index]) == 0) {
+            // Pin LO, set col bit
+            current_matrix[row_index] |= row_shifter;
+            key_pressed = true;
+        } else {
+            // Pin HI, clear col bit
+            current_matrix[row_index] &= ~row_shifter;
+        }
+    }
+
+    // Unselect col
+    unselect_col();
+    matrix_output_unselect_delay(current_col, key_pressed); // wait for all Row signals to go HIGH
+}
+
+void matrix_init_custom(void) {
+    HC595_initPin();
+
+    for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
+        if (row_pins[x] != NO_PIN) {
+            setPinInputHigh(row_pins[x]);
+        }
+    }
+
+    unselect_cols();
+}
+
+bool matrix_scan_custom(matrix_row_t current_matrix[]) {
+    matrix_row_t curr_matrix[MATRIX_ROWS] = {0};
+
+    // Set col, read rows
+    matrix_row_t row_shifter = MATRIX_ROW_SHIFTER;
+    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++, row_shifter <<= 1) {
+        matrix_read_rows_on_col(curr_matrix, current_col, row_shifter);
+    }
+
+    bool changed = memcmp(current_matrix, curr_matrix, sizeof(curr_matrix)) != 0;
+    if (changed) memcpy(current_matrix, curr_matrix, sizeof(curr_matrix));
+
+    return changed;
+}