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/*
* 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 {
uint32_t row;
uint32_t column;
uint32_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(const struct device *dev, uint32_t row, uint32_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);
uint32_t position = zmk_matrix_transform_row_column_to_position(ev.row, ev.column);
LOG_DBG("Row: %d, col: %d, position: %d, pressed: %s\n", ev.row, ev.column, position,
(pressed ? "true" : "false"));
ZMK_EVENT_RAISE(new_zmk_position_state_changed((struct zmk_position_state_changed){
.state = pressed, .position = position, .timestamp = k_uptime_get()}));
}
}
int zmk_kscan_init(char *name) {
const 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;
}
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