65e476df3e
* Avoid deadlocks by using a deadicated workqueue for sending position state notifications from peripherals.
109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/*
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* Copyright (c) 2020 The ZMK Contributors
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <zephyr/types.h>
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#include <sys/util.h>
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#include <init.h>
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#include <logging/log.h>
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LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
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#include <bluetooth/gatt.h>
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#include <bluetooth/uuid.h>
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#include <zmk/matrix.h>
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#include <zmk/split/bluetooth/uuid.h>
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#include <zmk/split/bluetooth/service.h>
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#define POS_STATE_LEN 16
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static uint8_t num_of_positions = ZMK_KEYMAP_LEN;
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static uint8_t position_state[POS_STATE_LEN];
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static ssize_t split_svc_pos_state(struct bt_conn *conn, const struct bt_gatt_attr *attrs,
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void *buf, uint16_t len, uint16_t offset) {
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return bt_gatt_attr_read(conn, attrs, buf, len, offset, &position_state,
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sizeof(position_state));
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}
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static ssize_t split_svc_num_of_positions(struct bt_conn *conn, const struct bt_gatt_attr *attrs,
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void *buf, uint16_t len, uint16_t offset) {
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return bt_gatt_attr_read(conn, attrs, buf, len, offset, attrs->user_data, sizeof(uint8_t));
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}
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static void split_svc_pos_state_ccc(const struct bt_gatt_attr *attr, uint16_t value) {
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LOG_DBG("value %d", value);
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}
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BT_GATT_SERVICE_DEFINE(
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split_svc, BT_GATT_PRIMARY_SERVICE(BT_UUID_DECLARE_128(ZMK_SPLIT_BT_SERVICE_UUID)),
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BT_GATT_CHARACTERISTIC(BT_UUID_DECLARE_128(ZMK_SPLIT_BT_CHAR_POSITION_STATE_UUID),
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BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY, BT_GATT_PERM_READ_ENCRYPT,
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split_svc_pos_state, NULL, &position_state),
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BT_GATT_CCC(split_svc_pos_state_ccc, BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT),
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BT_GATT_DESCRIPTOR(BT_UUID_NUM_OF_DIGITALS, BT_GATT_PERM_READ, split_svc_num_of_positions, NULL,
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&num_of_positions), );
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K_THREAD_STACK_DEFINE(service_q_stack, CONFIG_ZMK_SPLIT_BLE_PERIPHERAL_STACK_SIZE);
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struct k_work_q service_work_q;
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K_MSGQ_DEFINE(position_state_msgq, sizeof(char[POS_STATE_LEN]),
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CONFIG_ZMK_SPLIT_BLE_PERIPHERAL_POSITION_QUEUE_SIZE, 4);
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void send_position_state_callback(struct k_work *work) {
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uint8_t state[POS_STATE_LEN];
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while (k_msgq_get(&position_state_msgq, &state, K_NO_WAIT) == 0) {
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int err = bt_gatt_notify(NULL, &split_svc.attrs[1], &state, sizeof(state));
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if (err) {
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LOG_DBG("Error notifying %d", err);
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}
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}
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};
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K_WORK_DEFINE(service_position_notify_work, send_position_state_callback);
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int send_position_state() {
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int err = k_msgq_put(&position_state_msgq, position_state, K_MSEC(100));
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if (err) {
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switch (err) {
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case -EAGAIN: {
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LOG_WRN("Position state message queue full, popping first message and queueing again");
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uint8_t discarded_state[POS_STATE_LEN];
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k_msgq_get(&position_state_msgq, &discarded_state, K_NO_WAIT);
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return send_position_state();
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}
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default:
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LOG_WRN("Failed to queue position state to send (%d)", err);
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return err;
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}
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}
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k_work_submit_to_queue(&service_work_q, &service_position_notify_work);
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return 0;
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}
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int zmk_split_bt_position_pressed(uint8_t position) {
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WRITE_BIT(position_state[position / 8], position % 8, true);
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return send_position_state();
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}
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int zmk_split_bt_position_released(uint8_t position) {
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WRITE_BIT(position_state[position / 8], position % 8, false);
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return send_position_state();
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}
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int service_init(const struct device *_arg) {
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k_work_q_start(&service_work_q, service_q_stack, K_THREAD_STACK_SIZEOF(service_q_stack),
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CONFIG_ZMK_SPLIT_BLE_PERIPHERAL_PRIORITY);
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return 0;
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}
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SYS_INIT(service_init, APPLICATION, CONFIG_ZMK_BLE_INIT_PRIORITY);
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