- /*
- Copyright 2012 Jun Wako <wakojun@gmail.com>
- Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
- Copyright 2015 ZSA Technology Labs Inc (@zsa)
- Copyright 2020 Christopher Courtney <drashna@live.com> (@drashna)
-
- 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/>.
- */
-
-
- /*
- * scan matrix
- */
- #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 "matrix.h"
- #include "debounce.h"
- #include "ergodox_ez.h"
-
-
- /*
- * This constant define not debouncing time in msecs, assuming eager_pr.
- *
- * On Ergodox matrix scan rate is relatively low, because of slow I2C.
- * Now it's only 317 scans/second, or about 3.15 msec/scan.
- * According to Cherry specs, debouncing time is 5 msec.
- *
- * However, some switches seem to have higher debouncing requirements, or
- * something else might be wrong. (Also, the scan speed has improved since
- * that comment was written.)
- */
-
- /* matrix state(1:on, 0:off) */
- extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values
- extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
-
- static matrix_row_t read_cols(uint8_t row);
- static void init_cols(void);
- static void unselect_rows(void);
- static void select_row(uint8_t row);
-
- static uint8_t mcp23018_reset_loop;
-
- void matrix_init_custom(void) {
- // initialize row and col
-
- mcp23018_status = init_mcp23018();
-
- unselect_rows();
- init_cols();
- }
-
- // Reads and stores a row, returning
- // whether a change occurred.
- static inline bool store_raw_matrix_row(uint8_t index) {
- matrix_row_t temp = 0x3F & read_cols(index);
- if (raw_matrix[index] != temp) {
- raw_matrix[index] = temp;
- return true;
- }
- return false;
- }
-
- bool matrix_scan_custom(matrix_row_t current_matrix[]) {
- if (mcp23018_status) { // if there was an error
- if (++mcp23018_reset_loop == 0) {
- 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");
- ergodox_blink_all_leds();
- #ifdef RGB_MATRIX_ENABLE
- rgb_matrix_init(); // re-init driver on reconnect
- #endif
- }
- }
- }
-
- #ifdef LEFT_LEDS
- mcp23018_status = ergodox_left_leds_update();
- #endif // LEFT_LEDS
- bool changed = false;
- for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
- // select rows from left and right hands
- uint8_t left_index = i;
- uint8_t right_index = i + MATRIX_ROWS_PER_SIDE;
- select_row(left_index);
- select_row(right_index);
-
- changed |= store_raw_matrix_row(left_index);
- changed |= store_raw_matrix_row(right_index);
-
- unselect_rows();
- }
-
- return changed;
- }
-
- /* Column pin configuration
- *
- * Teensy
- * col: 0 1 2 3 4 5
- * pin: F0 F1 F4 F5 F6 F7
- *
- * MCP23018
- * col: 0 1 2 3 4 5
- * pin: B5 B4 B3 B2 B1 B0
- */
- static void init_cols(void) {
- // init on mcp23018
- // not needed, already done as part of init_mcp23018()
-
- // init on teensy
- setPinInputHigh(F0);
- setPinInputHigh(F1);
- setPinInputHigh(F4);
- setPinInputHigh(F5);
- setPinInputHigh(F6);
- setPinInputHigh(F7);
- }
-
- static matrix_row_t read_cols(uint8_t row) {
- if (row < 7) {
- if (mcp23018_status) { // if there was an error
- return 0;
- } else {
- uint8_t data = 0;
- // reading GPIOB (column port) since in mcp23018's sequential mode
- // it is addressed directly after writing to GPIOA in select_row()
- mcp23018_status = i2c_receive(I2C_ADDR, &data, 1, ERGODOX_EZ_I2C_TIMEOUT);
- return ~data;
- }
- } else {
- /* read from teensy
- * bitmask is 0b11110011, but we want those all
- * in the lower six bits.
- * we'll return 1s for the top two, but that's harmless.
- */
-
- return ~((PINF & 0x03) | ((PINF & 0xF0) >> 2));
- }
- }
-
- /* Row pin configuration
- *
- * Teensy
- * row: 7 8 9 10 11 12 13
- * pin: B0 B1 B2 B3 D2 D3 C6
- *
- * MCP23018
- * row: 0 1 2 3 4 5 6
- * pin: A0 A1 A2 A3 A4 A5 A6
- */
- static void unselect_rows(void) {
- // no need to unselect on mcp23018, because the select step sets all
- // the other row bits high, and it's not changing to a different
- // direction
-
- // unselect on teensy
- setPinInput(B0);
- setPinInput(B1);
- setPinInput(B2);
- setPinInput(B3);
- setPinInput(D2);
- setPinInput(D3);
- setPinInput(C6);
- }
-
- static void select_row(uint8_t row) {
- if (row < 7) {
- // select on mcp23018
- if (!mcp23018_status) {
- // set active row low : 0
- // set other rows hi-Z : 1
- uint8_t data;
- data = 0xFF & ~(1 << row);
- mcp23018_status = i2c_writeReg(I2C_ADDR, GPIOA, &data, 1, ERGODOX_EZ_I2C_TIMEOUT);
- }
- } else {
- // select on teensy
- // Output low(DDR:1, PORT:0) to select
- switch (row) {
- case 7:
- setPinOutput(B0);
- writePinLow(B0);
- break;
- case 8:
- setPinOutput(B1);
- writePinLow(B1);
- break;
- case 9:
- setPinOutput(B2);
- writePinLow(B2);
- break;
- case 10:
- setPinOutput(B3);
- writePinLow(B3);
- break;
- case 11:
- setPinOutput(D2);
- writePinLow(D2);
- break;
- case 12:
- setPinOutput(D3);
- writePinLow(D3);
- break;
- case 13:
- setPinOutput(C6);
- writePinLow(C6);
- break;
- }
- }
- }
-
- // DO NOT REMOVE
- // Needed for proper wake/sleep
- void matrix_power_up(void) {
- mcp23018_status = init_mcp23018();
-
- unselect_rows();
- init_cols();
-
- // initialize matrix state: all keys off
- for (uint8_t i=0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- }
-
- }
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