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fix(split): Use queue/work for peripheral events.

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* Avoid corruption by using work to process
  peripheral key position events on the main
  work thread, like local kscan events are.
* Fixes #221
This commit is contained in:
Pete Johanson 2020-12-03 00:12:21 -05:00
parent 969e5568af
commit 4aa78a6f8d
2 changed files with 40 additions and 11 deletions
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10
app/Kconfig
View file

@ -94,11 +94,19 @@ config ZMK_SPLIT_BLE
if ZMK_SPLIT_BLE
config ZMK_SPLIT_BLE_ROLE_CENTRAL
menuconfig ZMK_SPLIT_BLE_ROLE_CENTRAL
bool "Central"
select BT_CENTRAL
select BT_GATT_CLIENT
if ZMK_SPLIT_BLE_ROLE_CENTRAL
config ZMK_SPLIT_BLE_CENTRAL_POSITION_QUEUE_SIZE
int "Max number of key position state events to queue when received from peripherals"
default 5
endif
if !ZMK_SPLIT_BLE_ROLE_CENTRAL
config ZMK_USB

41
app/src/split/bluetooth/central.c
View file

@ -33,9 +33,32 @@ static struct bt_uuid_128 uuid = BT_UUID_INIT_128(ZMK_SPLIT_BT_SERVICE_UUID);
static struct bt_gatt_discover_params discover_params;
static struct bt_gatt_subscribe_params subscribe_params;
static uint8_t split_central_notify_func(struct bt_conn *conn,
struct bt_gatt_subscribe_params *params, const void *data,
uint16_t length) {
struct zmk_split_peripheral_event {
uint32_t position;
uint32_t state;
int32_t timestamp;
};
K_MSGQ_DEFINE(peripheral_event_msgq, sizeof(struct zmk_split_peripheral_event),
CONFIG_ZMK_SPLIT_BLE_CENTRAL_POSITION_QUEUE_SIZE, 4);
void peripheral_event_work_callback(struct k_work *work) {
struct zmk_split_peripheral_event ev;
while (k_msgq_get(&peripheral_event_msgq, &ev, K_NO_WAIT) == 0) {
struct position_state_changed *pos_ev = new_position_state_changed();
pos_ev->position = ev.position;
pos_ev->state = ev.state;
pos_ev->timestamp = ev.timestamp;
LOG_DBG("Trigger key position state change for %d", ev.position);
ZMK_EVENT_RAISE(pos_ev);
}
}
K_WORK_DEFINE(peripheral_event_work, peripheral_event_work_callback);
static uint8_t split_central_notify_func(struct bt_conn *conn, struct bt_gatt_subscribe_params *params,
const void *data, uint16_t length) {
static uint8_t position_state[POSITION_STATE_DATA_LEN];
uint8_t changed_positions[POSITION_STATE_DATA_LEN];
@ -58,13 +81,11 @@ static uint8_t split_central_notify_func(struct bt_conn *conn,
if (changed_positions[i] & BIT(j)) {
uint32_t position = (i * 8) + j;
bool pressed = position_state[i] & BIT(j);
struct position_state_changed *pos_ev = new_position_state_changed();
pos_ev->position = position;
pos_ev->state = pressed;
pos_ev->timestamp = k_uptime_get();
struct zmk_split_peripheral_event ev = {
.position = position, .state = pressed, .timestamp = k_uptime_get()};
LOG_DBG("Trigger key position state change for %d", position);
ZMK_EVENT_RAISE(pos_ev);
k_msgq_put(&peripheral_event_msgq, &ev, K_NO_WAIT);
k_work_submit(&peripheral_event_work);
}
}
}
@ -321,4 +342,4 @@ int zmk_split_bt_central_init(const struct device *_arg) {
return start_scan();
}
SYS_INIT(zmk_split_bt_central_init, APPLICATION, CONFIG_ZMK_BLE_INIT_PRIORITY);
SYS_INIT(zmk_split_bt_central_init, APPLICATION, CONFIG_ZMK_BLE_INIT_PRIORITY);