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#include <string.h>
#include "oryx.h"
#include "eeprom.h"
rawhid_state_t rawhid_state = {.pairing = false, .paired = false};
keypos_t keyboard_pairing_sequence[PAIRING_SEQUENCE_SIZE];
keypos_t host_pairing_sequence[PAIRING_SEQUENCE_SIZE];
uint8_t pairing_input_index = 0;
void raw_hid_receive(uint8_t *data, uint8_t length) {
uint8_t command = data[0];
uint8_t *param = &data[1];
uint8_t cmd_index = 0;
switch (command) {
case ORYX_CMD_GET_FW_VERSION: {
uint8_t event[RAW_EPSIZE];
uint8_t fw_version_size = sizeof(FIRMWARE_VERSION);
uint8_t stop[1];
event[0] = ORYX_EVT_GET_FW_VERSION;
stop[0] = ORYX_STOP_BIT;
memcpy(event + 1, FIRMWARE_VERSION, fw_version_size);
memcpy(event + fw_version_size, stop, 1);
raw_hid_send(event, RAW_EPSIZE);
break;
}
case ORYX_CMD_PAIRING_INIT:
pairing_init_handler();
store_pairing_sequence(&keyboard_pairing_sequence[0]);
break;
case ORYX_CMD_PAIRING_VALIDATE:
for (uint8_t i = 0; i < PAIRING_SEQUENCE_SIZE; i++) {
keypos_t pos;
pos.col = param[cmd_index++];
pos.row = param[cmd_index++];
host_pairing_sequence[i] = pos;
}
pairing_validate_eeprom_handler();
break;
case ORYX_SET_LAYER:
if(rawhid_state.paired == true) {
layer_clear();
layer_on(param[0]);
}
break;
}
}
void pairing_validate_eeprom_handler(void) {
bool match = false;
uint8_t event[RAW_EPSIZE];
uint8_t stored_sequences[sizeof(uint16_t) * PAIRING_SEQUENCE_SIZE * PAIRING_SEQUENCE_NUM_STORED];
eeprom_read_block(&stored_sequences, (uint8_t *)EECONFIG_SIZE, PAIRING_STORAGE_SIZE);
match = true;
if (match == true) {
event[0] = ORYX_EVT_PAIRING_SUCCESS;
rawhid_state.paired = true;
} else {
event[0] = ORYX_EVT_PAIRING_FAILED;
rawhid_state.paired = false;
}
event[1] = ORYX_STOP_BIT;
rawhid_state.pairing = false;
raw_hid_send(event, sizeof(event));
}
bool store_pairing_sequence(keypos_t *pairing_sequence) {
uint8_t stored_sequences[sizeof(uint16_t) * PAIRING_SEQUENCE_SIZE * PAIRING_SEQUENCE_NUM_STORED];
eeprom_read_block(&stored_sequences, (uint8_t *)EECONFIG_SIZE, PAIRING_STORAGE_SIZE);
uint8_t shiftLen = sizeof(&pairing_sequence);
for (int8_t i = PAIRING_STORAGE_SIZE; i >= 0; i--) {
if (i > shiftLen) {
stored_sequences[i] = stored_sequences[i - 1];
} else {
stored_sequences[i] = 0;
}
}
eeprom_update_block(stored_sequences, (uint8_t *)EECONFIG_SIZE, PAIRING_STORAGE_SIZE);
return true;
}
void pairing_init_handler(void) {
create_pairing_code();
uint8_t event[RAW_EPSIZE];
uint8_t event_index = 0;
event[event_index++] = ORYX_EVT_PAIRING_INPUT;
for (uint8_t i = 0; i < PAIRING_SEQUENCE_SIZE; i++) {
event[event_index++] = keyboard_pairing_sequence[i].col;
event[event_index++] = keyboard_pairing_sequence[i].row;
}
event[event_index++] = ORYX_STOP_BIT;
rawhid_state.pairing = true;
raw_hid_send(event, RAW_EPSIZE);
}
bool compare_sequences(keypos_t a[PAIRING_SEQUENCE_SIZE], keypos_t b[PAIRING_SEQUENCE_SIZE]) {
bool valid = true;
for (uint8_t i = 0; i < PAIRING_SEQUENCE_SIZE; i++) {
if (a[i].row != b[i].row) {
valid = false;
break;
}
if (a[i].col != b[i].col) {
valid = false;
break;
}
}
return valid;
}
void pairing_validate_handler() {
uint8_t event[RAW_EPSIZE];
bool valid = compare_sequences(keyboard_pairing_sequence, host_pairing_sequence);
if (valid == true) {
event[0] = ORYX_EVT_PAIRING_SUCCESS;
rawhid_state.paired = true;
} else {
event[0] = ORYX_EVT_PAIRING_FAILED;
rawhid_state.paired = false;
}
event[1] = ORYX_STOP_BIT;
rawhid_state.pairing = false;
raw_hid_send(event, sizeof(event));
}
keypos_t get_random_keypos(void) {
uint8_t col = rand() % MATRIX_COLS;
uint8_t row = rand() % MATRIX_ROWS;
keypos_t pos = {.col = col, .row = row};
uint16_t keycode = keymap_key_to_keycode(0, pos);
if (keycode >= KC_A && keycode <= KC_SLASH) {
return pos;
} else {
return get_random_keypos();
}
}
void create_pairing_code(void) {
for (uint8_t i = 0; i < PAIRING_SEQUENCE_SIZE; i++) {
keypos_t pos = get_random_keypos();
keyboard_pairing_sequence[i] = pos;
}
}
void pairing_key_input_event(void) {
uint8_t event[RAW_EPSIZE];
event[0] = ORYX_EVT_PAIRING_KEY_INPUT;
raw_hid_send(event, sizeof(event));
}
void oryx_layer_event(void) {
uint8_t layer;
uint8_t event[RAW_EPSIZE];
layer = get_highest_layer(layer_state);
event[0] = ORYX_EVT_LAYER;
event[1] = layer;
event[2] = ORYX_STOP_BIT;
raw_hid_send(event, sizeof(event));
}
bool process_record_oryx(uint16_t keycode, keyrecord_t *record) {
// In pairing mode, key events are absorbed, and the host pairing sequence is filled.
// Once filled, the keyboard and host sequence are compaired, pairing state set to false
// and the proper pairing validation event is sent to the host
if (rawhid_state.pairing == true) {
// The host pairing sequence is filled on key up only
if (!record->event.pressed) {
if (pairing_input_index < PAIRING_SEQUENCE_SIZE) {
host_pairing_sequence[pairing_input_index++] = record->event.key;
pairing_key_input_event();
}
wait_ms(1000);
if (pairing_input_index == PAIRING_SEQUENCE_SIZE) {
rawhid_state.pairing = false;
pairing_input_index = 0;
pairing_validate_handler();
}
}
return false;
}
// While paired, the keyboard sends keystrokes positions to the host
if (rawhid_state.paired == true) {
uint8_t event[RAW_EPSIZE];
event[0] = record->event.pressed ? ORYX_EVT_KEYDOWN : ORYX_EVT_KEYUP;
event[1] = record->event.key.col;
event[2] = record->event.key.row;
event[3] = ORYX_STOP_BIT;
raw_hid_send(event, sizeof(event));
}
return true;
}
void layer_state_set_oryx(layer_state_t state) {
if (rawhid_state.paired) {
wait_ms(50);
uint8_t event[RAW_EPSIZE];
event[0] = ORYX_EVT_LAYER;
event[1] = get_highest_layer(state);
event[2] = ORYX_STOP_BIT;
raw_hid_send(event, sizeof(event));
}
}
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