zmk_mf68/app/src/kscan.c
Okke Formsma d38740cebf
Add timestamps to position and behavior events (#147)
* Add timestamps to position events and behaviors.

- Take original event timestamps into consideration so nested tap-holds have proper timing.
- Add position and timestamp to keycode state changed event so the one-shot behavior can properly identify other keypresses and timings.
- Add timestamp to position events received from peripheral

* reduce number of arguments to behaviors
2020-10-10 17:32:53 -04:00

73 lines
2 KiB
C

/*
* Copyright (c) 2020 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
#include <zephyr.h>
#include <device.h>
#include <drivers/kscan.h>
#include <logging/log.h>
LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
#include <zmk/matrix_transform.h>
#include <zmk/event-manager.h>
#include <zmk/events/position-state-changed.h>
#define ZMK_KSCAN_EVENT_STATE_PRESSED 0
#define ZMK_KSCAN_EVENT_STATE_RELEASED 1
struct zmk_kscan_event {
u32_t row;
u32_t column;
u32_t state;
};
struct zmk_kscan_msg_processor {
struct k_work work;
} msg_processor;
K_MSGQ_DEFINE(zmk_kscan_msgq, sizeof(struct zmk_kscan_event), CONFIG_ZMK_KSCAN_EVENT_QUEUE_SIZE, 4);
static void zmk_kscan_callback(struct device *dev, u32_t row, u32_t column, bool pressed) {
struct zmk_kscan_event ev = {
.row = row,
.column = column,
.state = (pressed ? ZMK_KSCAN_EVENT_STATE_PRESSED : ZMK_KSCAN_EVENT_STATE_RELEASED)};
k_msgq_put(&zmk_kscan_msgq, &ev, K_NO_WAIT);
k_work_submit(&msg_processor.work);
}
void zmk_kscan_process_msgq(struct k_work *item) {
struct zmk_kscan_event ev;
while (k_msgq_get(&zmk_kscan_msgq, &ev, K_NO_WAIT) == 0) {
bool pressed = (ev.state == ZMK_KSCAN_EVENT_STATE_PRESSED);
u32_t position = zmk_matrix_transform_row_column_to_position(ev.row, ev.column);
struct position_state_changed *pos_ev;
LOG_DBG("Row: %d, col: %d, position: %d, pressed: %s\n", ev.row, ev.column, position,
(pressed ? "true" : "false"));
pos_ev = new_position_state_changed();
pos_ev->state = pressed;
pos_ev->position = position;
pos_ev->timestamp = k_uptime_get();
ZMK_EVENT_RAISE(pos_ev);
}
}
int zmk_kscan_init(char *name) {
struct device *dev = device_get_binding(name);
if (dev == NULL) {
LOG_ERR("Failed to get the KSCAN device");
return -EINVAL;
}
k_work_init(&msg_processor.work, zmk_kscan_process_msgq);
kscan_config(dev, zmk_kscan_callback);
kscan_enable_callback(dev);
return 0;
}