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- /* Copyright 2018 Jack Humbert
- *
- * 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 "qwiic_keyboard.h"
- #include "keymap.h"
- #include "matrix.h"
- #include "keyboard.h"
- #include "twi2c.h"
- #include <string.h>
- #include "usb_main.h"
- #include "usb_driver.h"
-
- #define QWIIC_KEYBOARD_LAYERS 16
- #define QWIIC_KEYBOARD_ROWS 8
- #define QWIIC_KEYBOARD_COLS 8
-
- #if (QWIIC_KEYBOARD_COLS <= 8)
- typedef uint8_t qwiic_row_t;
- #elif (QWIIC_KEYBOARD_COLS <= 16)
- typedef uint16_t qwiic_row_t;
- #elif (QWIIC_KEYBOARD_COLS <= 32)
- typedef uint32_t qwiic_row_t;
- #else
- #error "QWIIC_KEYBOARD_COLS: invalid value"
- #endif
-
- #define QWIIC_KEYBOARD_HANDSHAKE_ADDRESS 0b01010100
- #define QWIIC_KEYBOARD_LISTENING_ADDRESS_START 0b01010110
- #define QWIIC_KEYBOARD_MAX_DEVICES 1
-
- #define QWIIC_KEYBOARD_KEYMAP_MESSAGE_SIZE (QWIIC_KEYBOARD_LAYERS * QWIIC_KEYBOARD_ROWS * QWIIC_KEYBOARD_COLS)
- #define QWIIC_KEYBOARD_MATRIX_MESSAGE_SIZE (QWIIC_KEYBOARD_ROWS)
-
- void qwiic_keyboard_write_keymap(uint8_t * pointer);
- void qwiic_keyboard_read_keymap(uint8_t * pointer, uint8_t index);
-
- bool qwiic_keyboard_master = false;
- bool qwiic_keyboard_received_message = false;
- bool qwiic_keyboard_connected[QWIIC_KEYBOARD_MAX_DEVICES] = { false };
- uint8_t qwiic_keyboard_keymap_message[QWIIC_KEYBOARD_KEYMAP_MESSAGE_SIZE] = {0};
- uint8_t qwiic_keyboard_matrix_message[QWIIC_KEYBOARD_MATRIX_MESSAGE_SIZE] = {0};
- twi2c_message_received qwiic_keyboard_message_received_ptr = qwiic_keyboard_message_received;
- float song_one_up[][2] = SONG(ONE_UP_SOUND);
- float song_zelda[][2] = SONG(ZELDA_PUZZLE);
- uint8_t first_message = 0;
- uint8_t first_message_slave = 0;
-
- uint16_t qwiic_keyboard_keymap[QWIIC_KEYBOARD_MAX_DEVICES][QWIIC_KEYBOARD_LAYERS][QWIIC_KEYBOARD_ROWS][QWIIC_KEYBOARD_COLS] = {0};
- bool qwiic_keyboard_keymap_initialised[QWIIC_KEYBOARD_MAX_DEVICES] = { false };
- uint8_t qwiic_keyboard_listening_address[QWIIC_KEYBOARD_MAX_DEVICES] = { 0 };
- #define QWIIC_KEYBOARD_NOT_PROCESSING 255
- uint8_t qwiic_keyboard_processing_slave = QWIIC_KEYBOARD_NOT_PROCESSING;
-
- void qwiic_keyboard_init(void) {
- twi2c_init();
- twi2c_start();
- twi2c_start_listening(QWIIC_KEYBOARD_HANDSHAKE_ADDRESS, qwiic_keyboard_message_received_ptr);
- }
-
- void qwiic_keyboard_set_master(void) {
- if (!qwiic_keyboard_received_message) {
- twi2c_stop();
- twi2c_start();
- qwiic_keyboard_master = true;
- if (first_message == 0) {
- PLAY_SONG(song_one_up);
- }
- first_message += 1;
- }
- }
-
- void qwiic_keyboard_set_slave(void) {
- qwiic_keyboard_received_message = true;
- if (first_message_slave == 0) {
- PLAY_SONG(song_zelda);
- }
- first_message_slave += 1;
- }
-
- static uint8_t keymap_command[1] = { 0x01 };
- static uint8_t matrix_command[1] = { 0x02 };
- static uint8_t look_counter = 0;
-
- // uint8_t get_available_device_index(void) {
- // for (uint8_t i = 0; i < QWIIC_KEYBOARD_MAX_DEVICES; i++) {
- // if (!qwiic_keyboard_connected[i])
- // return i;
- // }
- // return 255;
- // }
-
- void qwiic_keyboard_get_matrix(uint8_t device_i) {
- // msg_t ret = twi2c_transmit_receive(qwiic_keyboard_listening_address[device_i],
- // matrix_command, 1,
- // qwiic_keyboard_matrix_message, QWIIC_KEYBOARD_MATRIX_MESSAGE_SIZE
- // );
- twi2c_transmit(qwiic_keyboard_listening_address[device_i], matrix_command, 1);
- msg_t ret = twi2c_receive(qwiic_keyboard_listening_address[device_i],
- qwiic_keyboard_matrix_message, QWIIC_KEYBOARD_MATRIX_MESSAGE_SIZE
- );
- switch (ret) {
- // majority of this is pulled from keyboard.c:keyboard_task()
- case I2C_OK:
- qwiic_keyboard_processing_slave = device_i;
- static qwiic_row_t matrix_prev[QWIIC_KEYBOARD_ROWS];
- qwiic_row_t matrix_row = 0;
- qwiic_row_t matrix_change = 0;
- #ifdef QMK_KEYS_PER_SCAN
- uint8_t keys_processed = 0;
- #endif
- for (uint8_t r = 0; r < QWIIC_KEYBOARD_ROWS; r++) {
- matrix_row = qwiic_keyboard_matrix_message[r];
- matrix_change = matrix_row ^ matrix_prev[r];
- if (matrix_change) {
- for (uint8_t c = 0; c < QWIIC_KEYBOARD_COLS; c++) {
- if (matrix_change & ((qwiic_row_t)1<<c)) {
- action_exec((keyevent_t){
- .key = (keypos_t){ .row = r, .col = c },
- .pressed = (matrix_row & ((qwiic_row_t)1<<c)),
- .time = (timer_read() | 1) /* time should not be 0 */
- });
- // record a processed key
- matrix_prev[r] ^= ((qwiic_row_t)1<<c);
- #ifdef QMK_KEYS_PER_SCAN
- // only jump out if we have processed "enough" keys.
- if (++keys_processed >= QMK_KEYS_PER_SCAN)
- #endif
- // process a key per task call
- goto QWIIC_MATRIX_LOOP_END;
- }
- }
- }
- }
- // call with pseudo tick event when no real key event.
- #ifdef QMK_KEYS_PER_SCAN
- // we can get here with some keys processed now.
- if (!keys_processed)
- #endif
- action_exec(TICK);
- QWIIC_MATRIX_LOOP_END:
- qwiic_keyboard_processing_slave = QWIIC_KEYBOARD_NOT_PROCESSING;
- // if (first_message == 100) {
- // PLAY_SONG(song_one_up);
- // }
- // first_message += 1;
- break;
- case I2C_ERROR:
- break;
- default:
- twi2c_start();
- break;
- }
- }
-
- void qwiic_keyboard_task(void) {
- if (USB_DRIVER.state == USB_ACTIVE)
- qwiic_keyboard_set_master();
- if (qwiic_keyboard_master) {
- for (uint8_t device_i = 0; device_i < QWIIC_KEYBOARD_MAX_DEVICES; device_i++) {
- if (qwiic_keyboard_connected[device_i]) {
- // send empty message, expecting matrix info
- if (!qwiic_keyboard_keymap_initialised[device_i]) {
- // if (MSG_OK == twi2c_transmit_receive(qwiic_keyboard_listening_address[device_i],
- // keymap_command, 1,
- // qwiic_keyboard_keymap_message, QWIIC_KEYBOARD_KEYMAP_MESSAGE_SIZE
- // )) {
- twi2c_transmit(qwiic_keyboard_listening_address[device_i], keymap_command, 1);
- if (MSG_OK == twi2c_receive(qwiic_keyboard_listening_address[device_i],
- qwiic_keyboard_keymap_message, QWIIC_KEYBOARD_KEYMAP_MESSAGE_SIZE
- )) {
- // load keymap into memory
- qwiic_keyboard_keymap_initialised[device_i] = true;
- qwiic_keyboard_read_keymap(qwiic_keyboard_keymap_message, device_i);
- qwiic_keyboard_get_matrix(device_i);
- }
- } else {
- qwiic_keyboard_get_matrix(device_i);
- } // end else - not init
- } else { // if not connected
- //if (look_counter == 0) {
- // send new address to listen on, expect back keymap
- uint8_t new_address = QWIIC_KEYBOARD_LISTENING_ADDRESS_START + (device_i*2);
- uint8_t address_copy = 0;
- twi2c_transmit(QWIIC_KEYBOARD_HANDSHAKE_ADDRESS, &new_address, 1);
- if (MSG_OK == twi2c_receive(QWIIC_KEYBOARD_HANDSHAKE_ADDRESS,
- &address_copy, 1
- )) {
- // if (MSG_OK == twi2c_transmit_receive(QWIIC_KEYBOARD_HANDSHAKE_ADDRESS,
- // &new_address, 1,
- // &address_copy, 1
- // )) {
- send_byte(address_copy);
- //if (address_copy == new_address) {
- PLAY_SONG(song_one_up);
- qwiic_keyboard_connected[device_i] = true;
- qwiic_keyboard_listening_address[device_i] = new_address;
- //}
- }
- //} // end if - look for new
- } // end else - connected
- } // end for - devices
- look_counter = ((look_counter + 1) % 150);
- } // end if - master
- }
-
- void qwiic_keyboard_message_received(I2CDriver *i2cp, uint8_t * body, uint16_t size) {
- qwiic_keyboard_set_slave();
- switch (body[0]) {
- // send keymap
- case 0x01:
- qwiic_keyboard_write_keymap(qwiic_keyboard_keymap_message);
- twi2c_reply(i2cp, qwiic_keyboard_keymap_message, QWIIC_KEYBOARD_KEYMAP_MESSAGE_SIZE);
- break;
- // send matrix
- case 0x02:
- case 0x00:
- for (uint8_t row = 0; row < QWIIC_KEYBOARD_ROWS; row++) {
- if (row < MATRIX_ROWS) {
- qwiic_keyboard_matrix_message[row] = matrix_get_row(row);
- } else {
- qwiic_keyboard_matrix_message[row] = 0;
- }
- }
- twi2c_reply(i2cp, qwiic_keyboard_matrix_message, QWIIC_KEYBOARD_MATRIX_MESSAGE_SIZE);
- break;
- default:
- qwiic_keyboard_listening_address[0] = body[0];
- twi2c_add_listening(body[0]);
- twi2c_remove_listening(QWIIC_KEYBOARD_HANDSHAKE_ADDRESS);
- qwiic_keyboard_connected[0] = true;
- qwiic_keyboard_master = false;
- twi2c_reply(i2cp, qwiic_keyboard_listening_address, 1);
- break;
- }
- }
-
- // qwiic_keyboard_message_received_ptr = qwiic_keyboard_message_received;
-
- __attribute__((optimize("O0")))
- void qwiic_keyboard_write_keymap(uint8_t * pointer) {
- for (uint8_t layer = 0; layer < QWIIC_KEYBOARD_LAYERS; layer++) {
- for (uint8_t row = 0; row < QWIIC_KEYBOARD_ROWS; row++) {
- for (uint8_t col = 0; col < QWIIC_KEYBOARD_COLS; col++) {
- uint16_t keycode = 0;
- keycode = pgm_read_word(&keymaps[layer][row][col]);
- *pointer++ = (keycode >> 8);
- *pointer++ = (keycode & 0xFF);
- }
- }
- }
- }
-
- void qwiic_keyboard_read_keymap(uint8_t * pointer, uint8_t index) {
- for (uint8_t layer = 0; layer < QWIIC_KEYBOARD_LAYERS; layer++) {
- for (uint8_t row = 0; row < QWIIC_KEYBOARD_ROWS; row++) {
- for (uint8_t col = 0; col < QWIIC_KEYBOARD_COLS; col++) {
- uint16_t keycode = ((*pointer++) << 8);
- keycode |= (*pointer++);
- qwiic_keyboard_keymap[index][layer][row][col] = keycode;
- }
- }
- }
- }
-
- // overwrite the built-in function - slaves don't need to process keycodes
- bool is_keyboard_master(void) {
- return qwiic_keyboard_master;
- }
-
- // overwrite the built-in function
- uint16_t keymap_key_to_keycode(uint8_t layer, keypos_t key) {
- if (qwiic_keyboard_processing_slave == QWIIC_KEYBOARD_NOT_PROCESSING) {
- // Read entire word (16bits)
- return pgm_read_word(&keymaps[(layer)][(key.row)][(key.col)]);
- } else {
- // trick the built-in handling to accept our replacement keymap
- return qwiic_keyboard_keymap[qwiic_keyboard_processing_slave][(layer)][(key.row)][(key.col)];
- }
- }
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