1 files changed, 218 insertions, 0 deletions

diff --git a/keyboards/moon/matrix.c b/keyboards/moon/matrix.c
new file mode 100644
index 000000000..c74c70f89
--- /dev/null
+++ b/keyboards/moon/matrix.c
@@ -0,0 +1,218 @@
+/*
+Copyright 2012-2019 Jun Wako, Jack Humbert, Yiancar, Mathias Andersson <wraul@dbox.se>
+
+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 <stdint.h>
+#include <stdbool.h>
+#include "wait.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "debounce.h"
+#include "quantum.h"
+#include "pca9555.h"
+
+/*
+ *       IC1 (PCA9555)                  IC2 (PCA9555)
+ *       ,----------.                   ,----------.
+ * SDA --| SDA  P00 |-- P1        SDA --| SDA  P00 |-- P17
+ * SCL --| SCL  P01 |-- P2        SCL --| SCL  P01 |-- P18
+ * INT --| INT  P02 |-- P3        INT --| INT  P02 |-- P19
+ *       |      P03 |-- P4              |      P03 |-- P20
+ * GND --| A0   P04 |-- P5        VCC --| A0   P04 |-- P21
+ * SJ1 --| A1   P05 |-- P6        SJ1 --| A1   P05 |-- P22
+ * GND --| A2   P06 |-- P7        GND --| A2   P06 |-- P23
+ *       |      P07 |-- P8              |      P07 |-- P24
+ *       |          |                   |          |
+ *       |      P10 |-- P9              |      P10 |-- P25
+ *       |      P11 |-- P10             |      P11 |-- P26
+ *       |      P12 |-- P11             |      P12 |-- P27
+ *       |      P13 |-- P12             |      P13 |-- P28
+ *       |      P14 |-- P13             |      P14 |-- P29
+ *       |      P15 |-- P14             |      P15 |-- P30
+ *       |      P16 |-- P15             |      P16 |-- P31
+ *       |      P17 |-- P16             |      P17 |-- P32
+ *       `----------'                   `----------'
+ */
+
+/*
+ * | Row | Pin |   | Col | Pin |
+ * | --- | --- |   | --- | --- |
+ * | 0   | P1  |   | 0   | P25 |
+ * | 1   | P2  |   | 1   | P26 |
+ * | 2   | P3  |   | 2   | P27 |
+ * | 3   | P4  |   | 3   | P28 |
+ * | 4   | P5  |   | 4   | P29 |
+ * | 5   | P6  |   | 5   | P30 |
+ * | 6   | P7  |   | 6   | P20 |
+ * | 7   | P8  |   | 7   | P21 |
+ *                 | 8   | P22 |
+ *                 | 9   | P23 |
+ *                 | A   | P24 |
+ */
+
+// PCA9555 slave addresses
+#define IC1 0x20
+#define IC2 0x21
+
+// PCA9555 column pin masks
+#define PORT0_COLS_MASK 0b11111000
+#define PORT1_COLS_MASK 0b00111111
+#define COLS_MASK 0b0000011111111111
+
+#if (MATRIX_COLS <= 8)
+#  define print_matrix_header() print("\nr/c 01234567\n")
+#  define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
+#  define matrix_bitpop(i) bitpop(matrix[i])
+#  define ROW_SHIFTER ((uint8_t)1)
+#elif (MATRIX_COLS <= 16)
+#  define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
+#  define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
+#  define matrix_bitpop(i) bitpop16(matrix[i])
+#  define ROW_SHIFTER ((uint16_t)1)
+#elif (MATRIX_COLS <= 32)
+#  define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
+#  define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
+#  define matrix_bitpop(i) bitpop32(matrix[i])
+#  define ROW_SHIFTER ((uint32_t)1)
+#endif
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
+static matrix_row_t matrix[MATRIX_ROWS];      // debounced values
+
+__attribute__((weak)) void matrix_init_quantum(void) { matrix_init_kb(); }
+
+__attribute__((weak)) void matrix_scan_quantum(void) { matrix_scan_kb(); }
+
+__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
+
+__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
+
+__attribute__((weak)) void matrix_init_user(void) {}
+
+__attribute__((weak)) void matrix_scan_user(void) {}
+
+inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }
+
+inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
+
+inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
+
+inline matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
+
+void matrix_print(void) {
+  print_matrix_header();
+
+  for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+    phex(row);
+    print(": ");
+    print_matrix_row(row);
+    print("\n");
+  }
+}
+
+uint8_t matrix_key_count(void) {
+  uint8_t count = 0;
+  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+    count += matrix_bitpop(i);
+  }
+  return count;
+}
+
+static void init_i2c(void) {
+  pca9555_init(IC1);
+  pca9555_init(IC2);
+}
+
+static void init_pins(void) {
+  // init cols - IC2 port0 & IC2 port1 input
+  pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT);
+  pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT);
+
+  // init rows - IC1 port0 output
+  pca9555_set_config(IC1, PCA9555_PORT0, ALL_OUTPUT);
+  pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH);
+}
+
+static void select_row(uint8_t row) {
+  // All rows are on the same IC and port
+  uint8_t mask = 1 << row;
+
+  // set active row low  : 0
+  // set other rows hi-Z : 1
+  pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH & (~mask));
+}
+
+static uint16_t read_cols(void) {
+  uint16_t state_1 = pca9555_readPins(IC2, PCA9555_PORT0);
+  uint16_t state_2 = pca9555_readPins(IC2, PCA9555_PORT1);
+
+  uint16_t state = ((state_1 & PORT0_COLS_MASK) << 3) | ((state_2 & PORT1_COLS_MASK));
+
+  // A low pin indicates an active column
+  return (~state) & COLS_MASK;
+}
+
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
+  // Store last value of row prior to reading
+  matrix_row_t last_row_value = current_matrix[current_row];
+
+  // Clear data in matrix row
+  current_matrix[current_row] = 0;
+
+  // Select row and wait for row selecton to stabilize
+  select_row(current_row);
+  wait_us(30);
+
+  current_matrix[current_row] |= read_cols();
+
+  // No need to unselect as `select_row` sets all the pins.
+
+  return (last_row_value != current_matrix[current_row]);
+}
+
+void matrix_init(void) {
+  // initialize i2c
+  init_i2c();
+
+  // initialize key pins
+  init_pins();
+
+  // initialize matrix state: all keys off
+  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+    raw_matrix[i] = 0;
+    matrix[i]     = 0;
+  }
+
+  debounce_init(MATRIX_ROWS);
+
+  matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void) {
+  bool changed = false;
+
+  for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+    changed |= read_cols_on_row(raw_matrix, current_row);
+  }
+
+  debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
+
+  matrix_scan_quantum();
+
+  return (uint8_t)changed;
+}