202 lines
7.2 KiB
C
202 lines
7.2 KiB
C
/* Copyright 2018 Jack Humbert
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*
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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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*
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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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*
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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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#include "qwiic_keyboard.h"
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#include "keymap.h"
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#include "matrix.h"
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#include "keyboard.h"
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#include "twi2c.h"
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#include <string.h>
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#include "usb_main.h"
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#include "usb_driver.h"
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#define QWIIC_KEYBOARD_LAYERS 16
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#define QWIIC_KEYBOARD_ROWS 8
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#define QWIIC_KEYBOARD_COLS 8
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#define qwiic_matrix_t uint8_t
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#define QWIIC_KEYBOARD_HANDSHAKE_ADDRESS 0b01010100
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#define QWIIC_KEYBOARD_LISTENING_ADDRESS_START 0b01010110
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#define QWIIC_KEYBOARD_HANDSHAKE_MESSAGE_SIZE (QWIIC_KEYBOARD_LAYERS * QWIIC_KEYBOARD_ROWS * QWIIC_KEYBOARD_COLS)
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#define QWIIC_KEYBOARD_MATRIX_MESSAGE_SIZE MATRIX_ROWS
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void qwiic_keyboard_write_keymap(uint8_t * pointer);
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void qwiic_keyboard_read_keymap(uint8_t * pointer);
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bool qwiic_keyboard_master = false;
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bool qwiic_keyboard_connected = false;
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uint8_t qwiic_keyboard_handshake_message[QWIIC_KEYBOARD_HANDSHAKE_MESSAGE_SIZE] = {0};
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uint8_t qwiic_keyboard_matrix_message[QWIIC_KEYBOARD_ROWS] = {0};
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twi2c_message_received qwiic_keyboard_message_received_ptr = qwiic_keyboard_message_received;
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uint16_t qwiic_keyboard_keymap[QWIIC_KEYBOARD_LAYERS][QWIIC_KEYBOARD_ROWS][QWIIC_KEYBOARD_COLS] = {0};
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uint8_t qwiic_keyboard_listening_address = QWIIC_KEYBOARD_LISTENING_ADDRESS_START;
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uint8_t qwiic_keyboard_processing_slave = false;
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void qwiic_keyboard_init(void) {
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twi2c_init();
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twi2c_start();
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twi2c_start_listening(QWIIC_KEYBOARD_HANDSHAKE_ADDRESS, qwiic_keyboard_message_received_ptr);
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}
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void qwiic_keyboard_set_master(void) {
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twi2c_stop();
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twi2c_start();
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qwiic_keyboard_master = true;
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}
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uint8_t command[1] = { 0x00 };
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void qwiic_keyboard_task(void) {
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if (USB_DRIVER.state == USB_ACTIVE)
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qwiic_keyboard_master = true;
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else
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qwiic_keyboard_master = false;
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if (qwiic_keyboard_master) {
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if (qwiic_keyboard_connected) {
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// send empty message, expecting matrix info
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if (MSG_OK == twi2c_transmit_receive(qwiic_keyboard_listening_address,
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command, 1,
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qwiic_keyboard_matrix_message, QWIIC_KEYBOARD_MATRIX_MESSAGE_SIZE
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)) {
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// majority of this is pulled from keyboard.c:keyboard_task()
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static qwiic_matrix_t matrix_prev[QWIIC_KEYBOARD_ROWS];
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qwiic_matrix_t matrix_row = 0;
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qwiic_matrix_t matrix_change = 0;
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#ifdef QMK_KEYS_PER_SCAN
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uint8_t keys_processed = 0;
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#endif
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qwiic_keyboard_processing_slave = true;
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for (uint8_t r = 0; r < QWIIC_KEYBOARD_ROWS; r++) {
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matrix_row = qwiic_keyboard_matrix_message[r];
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matrix_change = matrix_row ^ matrix_prev[r];
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if (matrix_change) {
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for (uint8_t c = 0; c < QWIIC_KEYBOARD_COLS; c++) {
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if (matrix_change & ((qwiic_matrix_t)1<<c)) {
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action_exec((keyevent_t){
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.key = (keypos_t){ .row = r, .col = c },
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.pressed = (matrix_row & ((qwiic_matrix_t)1<<c)),
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.time = (timer_read() | 1) /* time should not be 0 */
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});
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// record a processed key
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matrix_prev[r] ^= ((qwiic_matrix_t)1<<c);
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#ifdef QMK_KEYS_PER_SCAN
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// only jump out if we have processed "enough" keys.
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if (++keys_processed >= QMK_KEYS_PER_SCAN)
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#endif
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// process a key per task call
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goto QWIIC_MATRIX_LOOP_END;
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}
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}
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}
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}
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// call with pseudo tick event when no real key event.
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#ifdef QMK_KEYS_PER_SCAN
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// we can get here with some keys processed now.
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if (!keys_processed)
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#endif
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action_exec(TICK);
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QWIIC_MATRIX_LOOP_END:
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qwiic_keyboard_processing_slave = false;
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} else {
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// disconnect
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// qwiic_keyboard_connected = false;
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}
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} else { // if not connected
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// send new address to listen on, expect back keymap
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if (MSG_OK == twi2c_transmit_receive(QWIIC_KEYBOARD_HANDSHAKE_ADDRESS,
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&qwiic_keyboard_listening_address, 1,
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qwiic_keyboard_handshake_message, QWIIC_KEYBOARD_HANDSHAKE_MESSAGE_SIZE
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)) {
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qwiic_keyboard_connected = true;
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// load keymap into memory
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qwiic_keyboard_read_keymap(qwiic_keyboard_handshake_message);
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}
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}
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}
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}
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float song_one_up[][2] = SONG(ONE_UP_SOUND);
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bool first_message = true;
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void qwiic_keyboard_message_received(I2CDriver *i2cp, uint8_t * body, uint16_t size) {
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if (qwiic_keyboard_connected) {
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for (uint8_t row = 0; row < QWIIC_KEYBOARD_ROWS; row++) {
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if (row < MATRIX_ROWS) {
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qwiic_keyboard_matrix_message[row] = matrix_get_row(row);
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} else {
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qwiic_keyboard_matrix_message[row] = 0;
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}
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}
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twi2c_reply(i2cp, qwiic_keyboard_matrix_message, QWIIC_KEYBOARD_MATRIX_MESSAGE_SIZE);
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if (first_message) {
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PLAY_SONG(song_one_up);
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first_message = false;
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}
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} else {
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qwiic_keyboard_connected = true;
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qwiic_keyboard_master = false;
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qwiic_keyboard_listening_address = body[0];
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twi2c_restart_listening(qwiic_keyboard_listening_address);
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qwiic_keyboard_write_keymap(qwiic_keyboard_handshake_message);
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twi2c_reply(i2cp, qwiic_keyboard_handshake_message, QWIIC_KEYBOARD_HANDSHAKE_MESSAGE_SIZE);
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}
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}
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// qwiic_keyboard_message_received_ptr = qwiic_keyboard_message_received;
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__attribute__((optimize("O0")))
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void qwiic_keyboard_write_keymap(uint8_t * pointer) {
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for (uint8_t layer = 0; layer < QWIIC_KEYBOARD_LAYERS; layer++) {
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for (uint8_t row = 0; row < QWIIC_KEYBOARD_ROWS; row++) {
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for (uint8_t col = 0; col < QWIIC_KEYBOARD_COLS; col++) {
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uint16_t keycode = pgm_read_word(&keymaps[layer][row][col]);
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*pointer++ = (keycode >> 8);
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*pointer++ = (keycode & 0xFF);
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}
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}
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}
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}
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void qwiic_keyboard_read_keymap(uint8_t * pointer) {
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for (uint8_t layer = 0; layer < QWIIC_KEYBOARD_LAYERS; layer++) {
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for (uint8_t row = 0; row < QWIIC_KEYBOARD_ROWS; row++) {
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for (uint8_t col = 0; col < QWIIC_KEYBOARD_COLS; col++) {
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uint16_t keycode = ((*pointer++) << 8);
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keycode |= (*pointer++);
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qwiic_keyboard_keymap[layer][row][col] = keycode;
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}
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}
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}
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}
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// overwrite the built-in function - slaves don't need to process keycodes
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bool is_keyboard_master(void) {
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return qwiic_keyboard_master;
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}
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// overwrite the built-in function
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uint16_t keymap_key_to_keycode(uint8_t layer, keypos_t key) {
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if (qwiic_keyboard_processing_slave) {
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// trick the built-in handling to accept our replacement keymap
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return qwiic_keyboard_keymap[(layer)][(key.row)][(key.col)];
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//return KC_A;
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} else {
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// Read entire word (16bits)
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return pgm_read_word(&keymaps[(layer)][(key.row)][(key.col)]);
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}
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}
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