--- /dev/null
+/*
+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;
+}
projects / qmk_firmware.git / blobdiff