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#include "hid.h"
#include "keycode.h"
#include "split.h"
#include "keymat.h"
#include "keysym.h"
#include "keymap.h"
#include "hardware/timer.h"
#include "bsp/board.h"
#include "pico/types.h"
#include <string.h>
struct layerkey {
uint layer;
uint key;
};
static uint32_t keysyms[KEY_ROWS][KEY_COLS] = { 0 };
static struct layerkey active_stack[16] = { 0 };
static uint active_top = 0;
static uint8_t hid_report_prev[6] = { 0 };
static uint8_t hid_report[6] = { 0 };
static uint hid_report_len = 0;
static uint64_t bounce_mat[KEY_ROWS][KEY_COLS] = { 0 };
static bool seen_mat[KEY_ROWS][KEY_COLS];
static void active_pop(uint layer);
static void active_push(uint layer, uint key);
void
active_pop(uint layer)
{
uint i;
for (i = layer + 1; i <= active_top; i++)
active_stack[i-1] = active_stack[i];
if (layer <= active_top)
active_top--;
}
void
active_push(uint layer, uint key)
{
if (active_top == ARRLEN(active_stack) - 1) {
WARN("Active stack overflow");
return;
}
active_top += 1;
active_stack[active_top].layer = layer;
active_stack[active_top].key = key;
}
void
add_keycode(uint8_t keycode)
{
if (hid_report_len >= 6) {
WARN("HID report overflow");
return;
}
hid_report[hid_report_len] = keycode;
hid_report_len++;
}
void
handle_keypress(uint x, uint y)
{
uint32_t ksym;
int i;
if (!keymat_prev[y][x]) {
for (i = (int) active_top; i >= 0; i--) {
ksym = keymap_layers[active_stack[i].layer][y][x];
if (ksym == KC_NO) return;
if (ksym != KC_TRNS)
break;
}
if (i < 0) return;
keysyms[y][x] = ksym;
if (IS_SWITCH(keysyms[y][x])) {
INFO("LAYER %u", TO_LAYER(keysyms[y][x]));
active_push(TO_LAYER(ksym), y * KEY_COLS + x);
for (i = 0; i <= (int) active_top; i++) {
INFO("%i. ACTIVE %u %u", i,
active_stack[i].layer, active_stack[i].key);
}
}
}
if (!seen_mat[y][x]) {
if (IS_CTRL(keysyms[y][x])) {
if (IS_RIGHT(keysyms[y][x])) {
add_keycode(KC_RIGHT_CTRL);
} else {
add_keycode(KC_LEFT_CTRL);
}
}
if (IS_SHIFT(keysyms[y][x])) {
if (IS_RIGHT(keysyms[y][x])) {
add_keycode(KC_RIGHT_SHIFT);
} else {
add_keycode(KC_LEFT_SHIFT);
}
}
if (IS_ALT(keysyms[y][x])) {
if (IS_RIGHT(keysyms[y][x])) {
add_keycode(KC_RIGHT_ALT);
} else {
add_keycode(KC_LEFT_ALT);
}
}
if (IS_GUI(keysyms[y][x])) {
if (IS_RIGHT(keysyms[y][x])) {
add_keycode(KC_RIGHT_GUI);
} else {
add_keycode(KC_LEFT_GUI);
}
}
if (IS_CODE(keysyms[y][x])) {
add_keycode(TO_CODE(keysyms[y][x]));
INFO("CODE %u %u", active_top, keysyms[y][x]);
}
seen_mat[y][x] = true;
}
}
void
handle_keyrelease(uint x, uint y)
{
uint i;
if (keymat_prev[y][x]) {
for (i = 1; i <= active_top; i++) {
if (active_stack[i].key == y * KEY_COLS + x) {
active_pop(i);
break;
}
}
}
}
bool
update_report(void)
{
uint64_t now_us;
uint keycnt;
uint x, y;
keycnt = 0;
now_us = time_us_64();
for (y = 0; y < KEY_ROWS; y++) {
for (x = 0; x < KEY_COLS; x++) {
if (keymat[y][x] != keymat_prev[y][x]) {
if (bounce_mat[y][x] > now_us - 25000) {
WARN("Bouncing prevented %i vs %i",
keymat[y][x], keymat_prev[y][x]);
keymat[y][x] = keymat_prev[y][x];
} else {
bounce_mat[y][x] = now_us;
}
}
if (keymat[y][x]) {
handle_keypress(x, y);
} else {
handle_keyrelease(x, y);
}
}
}
return keycnt > 0;
}
void
hid_init(void)
{
}
bool
send_keyboard_report(void)
{
uint i;
if (memcmp(hid_report, hid_report_prev, sizeof(hid_report))) {
for (i = 0; i < 6; i++)
INFO("REPORT %u: %u", i, hid_report[i]);
tud_hid_keyboard_report(REPORT_ID_KEYBOARD, 0, hid_report);
memcpy(hid_report_prev, hid_report, sizeof(hid_report));
return true;
}
return false;
}
bool
send_mouse_report(bool state)
{
if (state) {
tud_hid_mouse_report(REPORT_ID_MOUSE, 0, 10, 10, 0, 0);
return true;
}
return false;
}
bool
send_consumer_control_report(bool state)
{
static bool cleared = true;
uint16_t report;
if (state) {
report = HID_USAGE_CONSUMER_VOLUME_DECREMENT;
tud_hid_report(REPORT_ID_CONSUMER_CONTROL, &report, 2);
cleared = false;
return true;
} else if (!cleared) {
report = 0;
tud_hid_report(REPORT_ID_CONSUMER_CONTROL, &report, 2);
cleared = true;
return true;
}
return false;
}
bool
send_hid_report(int id)
{
switch (id) {
case REPORT_ID_KEYBOARD:
return send_keyboard_report();
case REPORT_ID_MOUSE:
return send_mouse_report(false);
case REPORT_ID_CONSUMER_CONTROL:
return send_consumer_control_report(false);
}
return false;
}
void
tud_hid_report_complete_cb(uint8_t instance,
uint8_t const *report, uint8_t len)
{
uint8_t id;
for (id = report[0] + 1; id < REPORT_ID_MAX; id++) {
if (send_hid_report(id))
break;
}
}
void
hid_task(void)
{
update_report();
if (tud_hid_ready()) {
send_hid_report(REPORT_ID_MIN);
memset(hid_report, 0, sizeof(hid_report));
memset(seen_mat, 0, sizeof(seen_mat));
hid_report_len = 0;
}
}
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