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simple_service/central_simple_service/src/simple_service_client.c
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| #include "simple_service.h" | ||
| #include "simple_service_client.h" | ||
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| #include <zephyr/types.h> | ||
| #include <stddef.h> | ||
| #include <zephyr/sys/util.h> | ||
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| #include <dk_buttons_and_leds.h> | ||
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| #include <zephyr/bluetooth/bluetooth.h> | ||
| #include <zephyr/bluetooth/hci.h> | ||
| #include <zephyr/bluetooth/conn.h> | ||
| #include <zephyr/bluetooth/uuid.h> | ||
| #include <zephyr/bluetooth/gatt.h> | ||
| #include <bluetooth/gatt_dm.h> | ||
| #include <bluetooth/scan.h> | ||
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| #include <zephyr/logging/log.h> | ||
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| #define LOG_MODULE_NAME simple_service | ||
| LOG_MODULE_REGISTER(LOG_MODULE_NAME, LOG_LEVEL_DBG); | ||
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| enum { | ||
| SIMPLE_SERVICE_C_INITIALIZED, | ||
| SIMPLE_SERVICE_C_BUTTOM_NOTIF_ENABLED, | ||
| SIMPLE_SERVICE_C_RX_WRITE_PENDING | ||
| }; | ||
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| int bt_simple_service_handles_assign(struct bt_gatt_dm *dm, | ||
| struct bt_simple_service *simple_service_c) | ||
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| { | ||
| const struct bt_gatt_dm_attr *gatt_service_attr = | ||
| bt_gatt_dm_service_get(dm); | ||
| const struct bt_gatt_service_val *gatt_service = | ||
| bt_gatt_dm_attr_service_val(gatt_service_attr); | ||
| const struct bt_gatt_dm_attr *gatt_chrc; | ||
| const struct bt_gatt_dm_attr *gatt_desc; | ||
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| if (bt_uuid_cmp(gatt_service->uuid, BT_UUID_CUSTOM_SERVICE)) { | ||
| return -ENOTSUP; | ||
| } | ||
| LOG_DBG("Getting handles from Custom Auth service."); | ||
| memset(&simple_service_c->handles, 0xFF, sizeof(simple_service_c->handles)); | ||
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| /* Get Led (WRITE) Chatacteristic */ | ||
| gatt_chrc = bt_gatt_dm_char_by_uuid(dm, BT_UUID_CUSTOM_LED); | ||
| if (!gatt_chrc) { | ||
| LOG_ERR("Missing LED Write characteristic."); | ||
| return -EINVAL; | ||
| } | ||
| gatt_desc = bt_gatt_dm_desc_by_uuid(dm, gatt_chrc, BT_UUID_CUSTOM_LED); | ||
| if (!gatt_desc) { | ||
| LOG_ERR("Missing LED Write value descriptor in characteristic."); | ||
| return -EINVAL; | ||
| } | ||
| LOG_DBG("Found handle for LED Write characteristic = 0x%x.", gatt_desc->handle); | ||
| simple_service_c->handles.led = gatt_desc->handle; | ||
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| /* Get Button (READ) Characterstic and CCC*/ | ||
| gatt_chrc = bt_gatt_dm_char_by_uuid(dm, BT_UUID_BUTTON_CHRC); | ||
| if (!gatt_chrc) { | ||
| LOG_ERR("Missing Button Read characteristic."); | ||
| return -EINVAL; | ||
| } | ||
| gatt_desc = bt_gatt_dm_desc_by_uuid(dm, gatt_chrc, BT_UUID_BUTTON_CHRC); | ||
| if (!gatt_desc) { | ||
| LOG_ERR("Missing Button Read value descriptor in characteristic."); | ||
| return -EINVAL; | ||
| } | ||
| LOG_DBG("Found handle for BUTTON Read characteristic."); | ||
| simple_service_c->handles.button = gatt_desc->handle; | ||
| /* Button (Read) CCC */ | ||
| gatt_desc = bt_gatt_dm_desc_by_uuid(dm, gatt_chrc, BT_UUID_GATT_CCC); | ||
| if (!gatt_desc) { | ||
| LOG_ERR("Missing Button Read CCC in characteristic."); | ||
| return -EINVAL; | ||
| } | ||
| LOG_DBG("Found handle for CCC of BUTTON Read characteristic."); | ||
| simple_service_c->handles.button_ccc = gatt_desc->handle; | ||
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| /* Assign connection instance. */ | ||
| simple_service_c->conn = bt_gatt_dm_conn_get(dm); | ||
| return 0; | ||
| } | ||
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| static uint8_t on_received(struct bt_conn *conn, | ||
| struct bt_gatt_subscribe_params *params, | ||
| const void *data, uint16_t length) | ||
| { | ||
| struct bt_simple_service *simple_service; | ||
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| /* Retrieve Client module context. */ | ||
| simple_service = CONTAINER_OF(params, struct bt_simple_service, button_notif_params); | ||
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| if (!data) { | ||
| LOG_DBG("[UNSUBSCRIBED]"); | ||
| params->value_handle = 0; | ||
| atomic_clear_bit(&simple_service->state, SIMPLE_SERVICE_C_BUTTOM_NOTIF_ENABLED); | ||
| if (simple_service->cb.unsubscribed) { | ||
| simple_service->cb.unsubscribed(simple_service); | ||
| } | ||
| return BT_GATT_ITER_STOP; | ||
| } | ||
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| uint8_t value = *((uint8_t*)data); | ||
| LOG_DBG("[NOTIFICATION] data %p length %u value %d", data, length, value); | ||
| /* | ||
| if (value == 0x01) { | ||
| LOG_DBG("Received value: 0x01, setting LED on"); | ||
| dk_set_led_on(CHRC_STATUS_LED); | ||
| } else if (value == 0x00) { | ||
| LOG_DBG("Received value: 0x00, setting LED off"); | ||
| dk_set_led_off(CHRC_STATUS_LED); | ||
| } | ||
| */ | ||
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| if (simple_service->cb.received) { | ||
| return simple_service->cb.received(simple_service, data, length); | ||
| } | ||
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| return BT_GATT_ITER_CONTINUE; | ||
| } | ||
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| int bt_simple_service_subscribe_receive(struct bt_simple_service *simple_service_c) | ||
| { | ||
| int err; | ||
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| if (atomic_test_and_set_bit(&simple_service_c->state, SIMPLE_SERVICE_C_BUTTOM_NOTIF_ENABLED)) { | ||
| return -EALREADY; | ||
| } | ||
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| simple_service_c->button_notif_params.notify = on_received; | ||
| simple_service_c->button_notif_params.value = BT_GATT_CCC_NOTIFY; | ||
| simple_service_c->button_notif_params.value_handle = simple_service_c->handles.button; | ||
| simple_service_c->button_notif_params.ccc_handle = simple_service_c->handles.button_ccc; | ||
| atomic_set_bit(simple_service_c->button_notif_params.flags, | ||
| BT_GATT_SUBSCRIBE_FLAG_VOLATILE); | ||
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| err = bt_gatt_subscribe(simple_service_c->conn, &simple_service_c->button_notif_params); | ||
| if (err) { | ||
| LOG_ERR("Subscribe failed (err %d)", err); | ||
| atomic_clear_bit(&simple_service_c->state, SIMPLE_SERVICE_C_BUTTOM_NOTIF_ENABLED); | ||
| } else { | ||
| LOG_DBG("[SUBSCRIBED]"); | ||
| } | ||
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| return err; | ||
| } | ||
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| static void write_cb(struct bt_conn *conn, uint8_t err, | ||
| struct bt_gatt_write_params *params) | ||
| { | ||
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| struct bt_simple_service *simple_service_c; | ||
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| /* Retrieve module context. */ | ||
| simple_service_c = CONTAINER_OF(params, struct bt_simple_service, write_params); | ||
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| if (err) { | ||
| LOG_ERR("Write failed (err %u)", err); | ||
| } else { | ||
| LOG_DBG("Write complete"); | ||
| } | ||
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| } | ||
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| int bt_simple_service_set_led(struct bt_simple_service *simple_service_c, const uint8_t data) | ||
| { | ||
| int err; | ||
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| if (!simple_service_c->conn) { | ||
| return -ENOTCONN; | ||
| } | ||
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| simple_service_c->write_params.func = write_cb; | ||
| simple_service_c->write_params.handle = simple_service_c->handles.led; /* replace with the handle of the characteristic */ | ||
| simple_service_c->write_params.length = sizeof(data); | ||
| simple_service_c->write_params.offset = 0; | ||
| simple_service_c->write_params.data = &data; | ||
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| err = bt_gatt_write(simple_service_c->conn, &simple_service_c->write_params); | ||
| if (err) { | ||
| LOG_ERR("bt_gatt_write Error"); | ||
| } | ||
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| return err; | ||
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| } |
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