qmk_firmware/drivers/qwiic/qwiic_keyboard.c
2018-06-10 00:25:21 -04:00

203 lines
7.2 KiB
C

/* 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
#define qwiic_matrix_t uint8_t
#define QWIIC_KEYBOARD_HANDSHAKE_ADDRESS 0b01010100
#define QWIIC_KEYBOARD_LISTENING_ADDRESS_START 0b01010110
#define QWIIC_KEYBOARD_HANDSHAKE_MESSAGE_SIZE (QWIIC_KEYBOARD_LAYERS * QWIIC_KEYBOARD_ROWS * QWIIC_KEYBOARD_COLS)
#define QWIIC_KEYBOARD_MATRIX_MESSAGE_SIZE MATRIX_ROWS
void qwiic_keyboard_write_keymap(uint8_t * pointer);
void qwiic_keyboard_read_keymap(uint8_t * pointer);
bool qwiic_keyboard_master = false;
bool qwiic_keyboard_connected = false;
uint8_t qwiic_keyboard_handshake_message[QWIIC_KEYBOARD_HANDSHAKE_MESSAGE_SIZE] = {0};
uint8_t qwiic_keyboard_matrix_message[QWIIC_KEYBOARD_ROWS] = {0};
twi2c_message_received qwiic_keyboard_message_received_ptr = qwiic_keyboard_message_received;
uint16_t qwiic_keyboard_keymap[QWIIC_KEYBOARD_LAYERS][QWIIC_KEYBOARD_ROWS][QWIIC_KEYBOARD_COLS] = {0};
uint8_t qwiic_keyboard_listening_address = QWIIC_KEYBOARD_LISTENING_ADDRESS_START;
uint8_t qwiic_keyboard_processing_slave = false;
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) {
twi2c_stop();
twi2c_start();
qwiic_keyboard_master = true;
}
uint8_t command[1] = { 0x00 };
void qwiic_keyboard_task(void) {
if (USB_DRIVER.state == USB_ACTIVE)
qwiic_keyboard_master = true;
else
qwiic_keyboard_master = false;
if (qwiic_keyboard_master) {
if (qwiic_keyboard_connected) {
// send empty message, expecting matrix info
if (MSG_OK == twi2c_transmit_receive(qwiic_keyboard_listening_address,
command, 1,
qwiic_keyboard_matrix_message, QWIIC_KEYBOARD_MATRIX_MESSAGE_SIZE
)) {
// majority of this is pulled from keyboard.c:keyboard_task()
static qwiic_matrix_t matrix_prev[QWIIC_KEYBOARD_ROWS];
qwiic_matrix_t matrix_row = 0;
qwiic_matrix_t matrix_change = 0;
#ifdef QMK_KEYS_PER_SCAN
uint8_t keys_processed = 0;
#endif
qwiic_keyboard_processing_slave = true;
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_matrix_t)1<<c)) {
action_exec((keyevent_t){
.key = (keypos_t){ .row = r, .col = c },
.pressed = (matrix_row & ((qwiic_matrix_t)1<<c)),
.time = (timer_read() | 1) /* time should not be 0 */
});
// record a processed key
matrix_prev[r] ^= ((qwiic_matrix_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 = false;
} else {
// disconnect
// qwiic_keyboard_connected = false;
}
} else { // if not connected
// send new address to listen on, expect back keymap
if (MSG_OK == twi2c_transmit_receive(QWIIC_KEYBOARD_HANDSHAKE_ADDRESS,
&qwiic_keyboard_listening_address, 1,
qwiic_keyboard_handshake_message, QWIIC_KEYBOARD_HANDSHAKE_MESSAGE_SIZE
)) {
qwiic_keyboard_connected = true;
// load keymap into memory
qwiic_keyboard_read_keymap(qwiic_keyboard_handshake_message);
}
}
}
}
float song_one_up[][2] = SONG(ONE_UP_SOUND);
bool first_message = true;
void qwiic_keyboard_message_received(I2CDriver *i2cp, uint8_t * body, uint16_t size) {
if (qwiic_keyboard_connected) {
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);
if (first_message) {
PLAY_SONG(song_one_up);
first_message = false;
}
} else {
qwiic_keyboard_connected = true;
qwiic_keyboard_master = false;
qwiic_keyboard_listening_address = body[0];
twi2c_restart_listening(qwiic_keyboard_listening_address);
qwiic_keyboard_write_keymap(qwiic_keyboard_handshake_message);
twi2c_reply(i2cp, qwiic_keyboard_handshake_message, QWIIC_KEYBOARD_HANDSHAKE_MESSAGE_SIZE);
}
}
// 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 = pgm_read_word(&keymaps[layer][row][col]);
*pointer++ = (keycode >> 8);
*pointer++ = (keycode & 0xFF);
}
}
}
}
void qwiic_keyboard_read_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 = ((*pointer++) << 8);
keycode |= (*pointer++);
qwiic_keyboard_keymap[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) {
// trick the built-in handling to accept our replacement keymap
return qwiic_keyboard_keymap[(layer)][(key.row)][(key.col)];
//return KC_A;
} else {
// Read entire word (16bits)
return pgm_read_word(&keymaps[(layer)][(key.row)][(key.col)]);
}
}