forked from forks/qmk_firmware
17e7762de7
* Implemented Eager Per Row debouncing algorithm. Good for when fingers can only press one row at a time (e.g. when keyboard is wired so that "rows" are vertical) * Added documentation for eager_pr * Ported ergodox_ez to eager_pr debouncing. * Removed check for changes in matrix_scan. * Added further clarification in docs. * Accidental merge with ergodox_ez * Small cleanup in eager_pr * Forgot to debounce_init - this would probably cause seg-faults.
336 lines
8.7 KiB
C
336 lines
8.7 KiB
C
/*
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Note for ErgoDox EZ customizers: Here be dragons!
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This is not a file you want to be messing with.
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All of the interesting stuff for you is under keymaps/ :)
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Love, Erez
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Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* scan matrix
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include "wait.h"
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#include "action_layer.h"
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "matrix.h"
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#include "debounce.h"
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#include QMK_KEYBOARD_H
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#ifdef DEBUG_MATRIX_SCAN_RATE
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# include "timer.h"
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#endif
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/*
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* This constant define not debouncing time in msecs, assuming eager_pr.
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*
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* On Ergodox matrix scan rate is relatively low, because of slow I2C.
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* Now it's only 317 scans/second, or about 3.15 msec/scan.
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* According to Cherry specs, debouncing time is 5 msec.
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*
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* However, some switches seem to have higher debouncing requirements, or
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* something else might be wrong. (Also, the scan speed has improved since
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* that comment was written.)
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*/
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#ifndef DEBOUNCE
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# define DEBOUNCE 5
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#endif
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/* matrix state(1:on, 0:off) */
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static matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
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static matrix_row_t matrix[MATRIX_ROWS]; // debounced values
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static matrix_row_t read_cols(uint8_t row);
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static void init_cols(void);
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static void unselect_rows(void);
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static void select_row(uint8_t row);
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static uint8_t mcp23018_reset_loop;
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// static uint16_t mcp23018_reset_loop;
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#ifdef DEBUG_MATRIX_SCAN_RATE
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uint32_t matrix_timer;
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uint32_t matrix_scan_count;
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#endif
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__attribute__((weak)) void matrix_init_user(void) {}
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__attribute__((weak)) void matrix_scan_user(void) {}
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__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
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__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
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inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }
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inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
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void matrix_init(void) {
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// initialize row and col
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mcp23018_status = init_mcp23018();
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unselect_rows();
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init_cols();
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// initialize matrix state: all keys off
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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matrix[i] = 0;
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raw_matrix[i] = 0;
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}
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#ifdef DEBUG_MATRIX_SCAN_RATE
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matrix_timer = timer_read32();
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matrix_scan_count = 0;
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#endif
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debounce_init(MATRIX_ROWS);
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matrix_init_quantum();
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}
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void matrix_power_up(void) {
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mcp23018_status = init_mcp23018();
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unselect_rows();
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init_cols();
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// initialize matrix state: all keys off
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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matrix[i] = 0;
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}
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#ifdef DEBUG_MATRIX_SCAN_RATE
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matrix_timer = timer_read32();
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matrix_scan_count = 0;
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#endif
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}
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uint8_t matrix_scan(void) {
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if (mcp23018_status) { // if there was an error
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if (++mcp23018_reset_loop == 0) {
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// if (++mcp23018_reset_loop >= 1300) {
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// since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
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// this will be approx bit more frequent than once per second
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print("trying to reset mcp23018\n");
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mcp23018_status = init_mcp23018();
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if (mcp23018_status) {
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print("left side not responding\n");
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} else {
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print("left side attached\n");
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ergodox_blink_all_leds();
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}
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}
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}
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#ifdef DEBUG_MATRIX_SCAN_RATE
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matrix_scan_count++;
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uint32_t timer_now = timer_read32();
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if (TIMER_DIFF_32(timer_now, matrix_timer) > 1000) {
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print("matrix scan frequency: ");
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pdec(matrix_scan_count);
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print("\n");
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matrix_timer = timer_now;
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matrix_scan_count = 0;
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}
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#endif
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#ifdef LEFT_LEDS
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mcp23018_status = ergodox_left_leds_update();
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#endif // LEFT_LEDS
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for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
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// select rows from left and right hands
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select_row(i);
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select_row(i + MATRIX_ROWS_PER_SIDE);
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// we don't need a 30us delay anymore, because selecting a
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// left-hand row requires more than 30us for i2c.
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// grab left + right cols.
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raw_matrix[i] = read_cols(i);
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raw_matrix[i+MATRIX_ROWS_PER_SIDE] = read_cols(i+MATRIX_ROWS_PER_SIDE);
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unselect_rows();
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}
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debounce(raw_matrix, matrix, MATRIX_ROWS, true);
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matrix_scan_quantum();
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return 1;
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}
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bool matrix_is_modified(void) // deprecated and evidently not called.
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{
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return true;
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}
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inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
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inline matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
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void matrix_print(void) {
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print("\nr/c 0123456789ABCDEF\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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phex(row);
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print(": ");
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pbin_reverse16(matrix_get_row(row));
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print("\n");
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}
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}
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uint8_t matrix_key_count(void) {
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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count += bitpop16(matrix[i]);
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}
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return count;
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}
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/* Column pin configuration
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*
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* Teensy
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* col: 0 1 2 3 4 5
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* pin: F0 F1 F4 F5 F6 F7
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*
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* MCP23018
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* col: 0 1 2 3 4 5
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* pin: B5 B4 B3 B2 B1 B0
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*/
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static void init_cols(void) {
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// init on mcp23018
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// not needed, already done as part of init_mcp23018()
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// init on teensy
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// Input with pull-up(DDR:0, PORT:1)
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DDRF &= ~(1 << 7 | 1 << 6 | 1 << 5 | 1 << 4 | 1 << 1 | 1 << 0);
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PORTF |= (1 << 7 | 1 << 6 | 1 << 5 | 1 << 4 | 1 << 1 | 1 << 0);
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}
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static matrix_row_t read_cols(uint8_t row) {
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if (row < 7) {
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if (mcp23018_status) { // if there was an error
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return 0;
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} else {
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uint8_t data = 0;
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mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT);
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if (mcp23018_status) goto out;
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mcp23018_status = i2c_write(GPIOB, ERGODOX_EZ_I2C_TIMEOUT);
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if (mcp23018_status) goto out;
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mcp23018_status = i2c_start(I2C_ADDR_READ, ERGODOX_EZ_I2C_TIMEOUT);
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if (mcp23018_status) goto out;
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mcp23018_status = i2c_read_nack(ERGODOX_EZ_I2C_TIMEOUT);
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if (mcp23018_status < 0) goto out;
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data = ~((uint8_t)mcp23018_status);
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mcp23018_status = I2C_STATUS_SUCCESS;
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out:
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i2c_stop();
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return data;
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}
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} else {
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/* read from teensy
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* bitmask is 0b11110011, but we want those all
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* in the lower six bits.
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* we'll return 1s for the top two, but that's harmless.
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*/
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return ~((PINF & 0x03) | ((PINF & 0xF0) >> 2));
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}
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}
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/* Row pin configuration
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*
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* Teensy
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* row: 7 8 9 10 11 12 13
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* pin: B0 B1 B2 B3 D2 D3 C6
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*
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* MCP23018
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* row: 0 1 2 3 4 5 6
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* pin: A0 A1 A2 A3 A4 A5 A6
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*/
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static void unselect_rows(void) {
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// no need to unselect on mcp23018, because the select step sets all
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// the other row bits high, and it's not changing to a different
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// direction
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// unselect on teensy
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// Hi-Z(DDR:0, PORT:0) to unselect
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DDRB &= ~(1 << 0 | 1 << 1 | 1 << 2 | 1 << 3);
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PORTB &= ~(1 << 0 | 1 << 1 | 1 << 2 | 1 << 3);
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DDRD &= ~(1 << 2 | 1 << 3);
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PORTD &= ~(1 << 2 | 1 << 3);
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DDRC &= ~(1 << 6);
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PORTC &= ~(1 << 6);
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}
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static void select_row(uint8_t row) {
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if (row < 7) {
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// select on mcp23018
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if (mcp23018_status) { // if there was an error
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// do nothing
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} else {
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// set active row low : 0
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// set other rows hi-Z : 1
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mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT);
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if (mcp23018_status) goto out;
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mcp23018_status = i2c_write(GPIOA, ERGODOX_EZ_I2C_TIMEOUT);
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if (mcp23018_status) goto out;
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mcp23018_status = i2c_write(0xFF & ~(1 << row), ERGODOX_EZ_I2C_TIMEOUT);
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if (mcp23018_status) goto out;
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out:
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i2c_stop();
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}
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} else {
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// select on teensy
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// Output low(DDR:1, PORT:0) to select
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switch (row) {
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case 7:
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DDRB |= (1 << 0);
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PORTB &= ~(1 << 0);
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break;
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case 8:
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DDRB |= (1 << 1);
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PORTB &= ~(1 << 1);
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break;
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case 9:
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DDRB |= (1 << 2);
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PORTB &= ~(1 << 2);
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break;
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case 10:
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DDRB |= (1 << 3);
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PORTB &= ~(1 << 3);
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break;
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case 11:
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DDRD |= (1 << 2);
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PORTD &= ~(1 << 2);
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break;
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case 12:
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DDRD |= (1 << 3);
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PORTD &= ~(1 << 3);
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break;
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case 13:
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DDRC |= (1 << 6);
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PORTC &= ~(1 << 6);
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break;
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}
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}
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}
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