gatts_demo.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "freertos/FreeRTOS.h"			//multi_threadを使う
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "freertos/queue.h"

#include "esp_system.h"
#include "esp_log.h"
#include "nvs_flash.h"

#include "bt.h"
#include "bta_api.h"

#include "esp_gap_ble_api.h"			//esp_ble_api	esp bluetoothを使う
#include "esp_gatts_api.h"
#include "esp_bt_defs.h"
#include "esp_bt_main.h"

#include "sdkconfig.h"

#include "driver/i2c.h"

#define GATTS_TAG "BEL_TEST"

//	前　１	
//　右　２
//　左　３
//　後　４
//
//
//
//
//

//use i2c tranfer macro
#define RW_TEST_LENGTH       1 /*単位はバイト*/
#define DELAY_TIME_BETWEEN_ITEMS_MS   1234 /*!< delay time between different test items */

#define I2C_EXAMPLE_SLAVE_SCL_IO     26    /*!<gpio number for i2c slave clock  */
#define I2C_EXAMPLE_SLAVE_SDA_IO     25    /*!<gpio number for i2c slave data */
#define I2C_EXAMPLE_SLAVE_NUM I2C_NUM_0    /*!<I2C port number for slave dev */
#define I2C_EXAMPLE_SLAVE_TX_BUF_LEN  200 /*!<I2C slave tx buffer size */
#define I2C_EXAMPLE_SLAVE_RX_BUF_LEN  200 /*!<I2C slave rx buffer size */
#define ESP_SLAVE_ADDR 0x04         /*!< ESP32 slave address, you can set any 7bit value */

#define ACK_CHECK_EN   0x1     /*!< I2C master will check ack from slave*/
#define ACK_CHECK_DIS  0x0   
/*!< I2C ack value */
#define NACK_VAL   0x1         /*!< I2C nack value */

#define GATTS_SERVICE_UUID_TEST_A   0x00FF
#define GATTS_CHAR_UUID_TEST_A      0xFF01
#define GATTS_DESCR_UUID_TEST_A     0x3333
#define GATTS_NUM_HANDLE_TEST_A     4

//////////////////////////////////////////////////////////////////////////////////////////ljk;

///Declare the static function 
static void gatts_profile_a_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param);

int buf = 0;
i2c_cmd_handle_t cmd;
int wr_temp = 0;

#define TEST_DEVICE_NAME            "BEL_TEST"
#define TEST_MANUFACTURER_DATA_LEN  17

#define GATTS_DEMO_CHAR_VAL_LEN_MAX 0x40

#define PREPARE_BUF_MAX_SIZE 1024

uint8_t char1_str[] = {0x11,0x22,0x33};

esp_attr_value_t gatts_demo_char1_val = 
{
    .attr_max_len = GATTS_DEMO_CHAR_VAL_LEN_MAX,
    .attr_len     = sizeof(char1_str),
    .attr_value   = char1_str,
};

#ifdef CONFIG_SET_RAW_ADV_DATA
static uint8_t raw_adv_data[] = {
        0x02, 0x01, 0x06,
        0x02, 0x0a, 0xeb, 0x03, 0x03, 0xab, 0xcd
};
static uint8_t raw_scan_rsp_data[] = {
        0x0f, 0x09, 0x45, 0x53, 0x50, 0x5f, 0x47, 0x41, 0x54, 0x54, 0x53, 0x5f, 0x44,
        0x45, 0x4d, 0x4f
};
#else

static uint8_t test_service_uuid128[32] = {
    /* LSB <--------------------------------------------------------------------------------> MSB */
    //first uuid, 16bit, [12],[13] is the value
    't', 'e','s', 't', 0x80, 0x00, 0x00, 0x80, 0x00, 0x10, 0x00, 0x00, 0xAB, 0xCD, 0x00, 0x00,
    //second uuid, 32bit, [12], [13], [14], [15] is the value
    0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80, 0x00, 0x10, 0x00, 0x00, 0xAB, 0xCD, 0xAB, 0xCD,
};

//static uint8_t test_manufacturer[TEST_MANUFACTURER_DATA_LEN] =  {0x12, 0x23, 0x45, 0x56};

static esp_ble_adv_data_t test_adv_data = {
    .set_scan_rsp = false,
    .include_name = true,
    .include_txpower = true,
    .min_interval = 0x20,
    .max_interval = 0x40,
    .appearance = 0x00,
    .manufacturer_len = TEST_MANUFACTURER_DATA_LEN,
    .p_manufacturer_data = &test_manufacturer[0],
    .service_data_len = 0,
    .p_service_data = NULL,
    .service_uuid_len = 4,
    .p_service_uuid = "TEST",
    .flag = (ESP_BLE_ADV_FLAG_GEN_DISC | ESP_BLE_ADV_FLAG_BREDR_NOT_SPT),
};
#endif /* CONFIG_SET_RAW_ADV_DATA */

static esp_ble_adv_params_t test_adv_params = {
    .adv_int_min        = 0x20,
    .adv_int_max        = 0x40,	
    .adv_type           = ADV_TYPE_IND,
    .own_addr_type      = BLE_ADDR_TYPE_PUBLIC,
    //.peer_addr            =
    //.peer_addr_type       =
    .channel_map        = ADV_CHNL_ALL,
    .adv_filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,
};

#define PROFILE_NUM 1									//プログラムのservice数 
#define PROFILE_A_APP_ID 0

struct gatts_profile_inst {
    esp_gatts_cb_t gatts_cb;
    uint16_t gatts_if;
    uint16_t app_id;
    uint16_t conn_id;
    uint16_t service_handle;
    esp_gatt_srvc_id_t service_id;
    uint16_t char_handle;
    esp_bt_uuid_t char_uuid;
    esp_gatt_perm_t perm;
    esp_gatt_char_prop_t property;
    uint16_t descr_handle;
    esp_bt_uuid_t descr_uuid;
};

/* One gatt-based profile one app_id and one gatts_if, this array will store the gatts_if returned by ESP_GATTS_REG_EVT */
static struct gatts_profile_inst gl_profile_tab[PROFILE_NUM] = {
    [PROFILE_A_APP_ID] = {
        .gatts_cb = gatts_profile_a_event_handler,
        .gatts_if = ESP_GATT_IF_NONE,       /* Not get the gatt_if, so initial is ESP_GATT_IF_NONE */
    },
};

//このプログラムで読み込むデータ型
typedef struct {
	uint8_t                 *prepare_buf;								//8ビットの数字を使う
    int                     prepare_len;
} prepare_type_env_t;

static prepare_type_env_t a_prepare_write_env;


void example_write_event_env(esp_gatt_if_t gatts_if, prepare_type_env_t *prepare_write_env, esp_ble_gatts_cb_param_t *param);
void example_exec_write_event_env(prepare_type_env_t *prepare_write_env, esp_ble_gatts_cb_param_t *param);

static void gap_event_handler(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param)
{
    switch (event) {
    case ESP_GAP_BLE_ADV_DATA_SET_COMPLETE_EVT:
        esp_ble_gap_start_advertising(&test_adv_params);
        break;
    case ESP_GAP_BLE_ADV_DATA_RAW_SET_COMPLETE_EVT:
        esp_ble_gap_start_advertising(&test_adv_params);
        break;
    case ESP_GAP_BLE_SCAN_RSP_DATA_RAW_SET_COMPLETE_EVT:
        esp_ble_gap_start_advertising(&test_adv_params);
        break;
    case ESP_GAP_BLE_ADV_START_COMPLETE_EVT:
        //advertising start complete event to indicate advertising start successfully or failed
        if (param->adv_start_cmpl.status != ESP_BT_STATUS_SUCCESS) {
            ESP_LOGE(GATTS_TAG, "Advertising start failed\n");
        }
        break;
    case ESP_GAP_BLE_ADV_STOP_COMPLETE_EVT:
        if (param->adv_stop_cmpl.status != ESP_BT_STATUS_SUCCESS) {
            ESP_LOGE(GATTS_TAG, "Advertising stop failed\n");
        }
        else {
            ESP_LOGI(GATTS_TAG, "Stop adv successfully\n");
        }
        break;
    case ESP_GAP_BLE_UPDATE_CONN_PARAMS_EVT:
         ESP_LOGI(GATTS_TAG, "update connetion params status = %d, min_int = %x, max_int = %x,\
                  conn_int = %d,latency = %d, timeout = %d", param->update_conn_params.status,
                  param->update_conn_params.min_int,
                  param->update_conn_params.max_int,
                  param->update_conn_params.conn_int,
                  param->update_conn_params.latency,
                  param->update_conn_params.timeout);
        break;
    default:
        break;
    }
}

void example_write_event_env(esp_gatt_if_t gatts_if, prepare_type_env_t *prepare_write_env, esp_ble_gatts_cb_param_t *param){
    esp_gatt_status_t status = ESP_GATT_OK;
    if (param->write.need_rsp){
        if (param->write.is_prep){
            if (prepare_write_env->prepare_buf == NULL) {
                prepare_write_env->prepare_buf = (uint8_t *)malloc(PREPARE_BUF_MAX_SIZE*sizeof(uint8_t));
                prepare_write_env->prepare_len = 0;
                if (prepare_write_env->prepare_buf == NULL) {
                    LOG_ERROR("Gatt_server prep no mem\n");
                    status = ESP_GATT_NO_RESOURCES;
                }
            } else {
                if(param->write.offset > PREPARE_BUF_MAX_SIZE) {
                    status = ESP_GATT_INVALID_OFFSET;
                } else if ((param->write.offset + param->write.len) > PREPARE_BUF_MAX_SIZE) {
                    status = ESP_GATT_INVALID_ATTR_LEN;
                }
            }

            esp_gatt_rsp_t *gatt_rsp = (esp_gatt_rsp_t *)malloc(sizeof(esp_gatt_rsp_t));
            gatt_rsp->attr_value.len = param->write.len;
            gatt_rsp->attr_value.handle = param->write.handle;
            gatt_rsp->attr_value.offset = param->write.offset;
            gatt_rsp->attr_value.auth_req = ESP_GATT_AUTH_REQ_NONE;
            memcpy(gatt_rsp->attr_value.value, param->write.value, param->write.len);
            esp_err_t response_err = esp_ble_gatts_send_response(gatts_if, param->write.conn_id, param->write.trans_id, status, gatt_rsp);
            if (response_err != ESP_OK){
               LOG_ERROR("Send response error\n");
            }
            free(gatt_rsp);
            if (status != ESP_GATT_OK){
                return;
            }
            memcpy(prepare_write_env->prepare_buf + param->write.offset,
                   param->write.value,
                   param->write.len);
            prepare_write_env->prepare_len += param->write.len;

        }else{
            esp_ble_gatts_send_response(gatts_if, param->write.conn_id, param->write.trans_id, status, NULL);
        }
    }
}

void example_exec_write_event_env(prepare_type_env_t *prepare_write_env, esp_ble_gatts_cb_param_t *param){
    if (param->exec_write.exec_write_flag == ESP_GATT_PREP_WRITE_EXEC){
        esp_log_buffer_hex(GATTS_TAG, (char *)prepare_write_env->prepare_buf, prepare_write_env->prepare_len);
    }else{
        ESP_LOGI(GATTS_TAG,"ESP_GATT_PREP_WRITE_CANCEL");
    }
    if (prepare_write_env->prepare_buf) {
        free(prepare_write_env->prepare_buf);
        prepare_write_env->prepare_buf = NULL;
    }
    prepare_write_env->prepare_len = 0;
}


static void gatts_profile_a_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param) {
    switch (event) {
    case ESP_GATTS_REG_EVT:
        ESP_LOGI(GATTS_TAG, "REGISTER_APP_EVT, status %d, app_id %d\n", param->reg.status, param->reg.app_id);
        gl_profile_tab[PROFILE_A_APP_ID].service_id.is_primary = true;
        gl_profile_tab[PROFILE_A_APP_ID].service_id.id.inst_id = 0x00;
        gl_profile_tab[PROFILE_A_APP_ID].service_id.id.uuid.len = ESP_UUID_LEN_16;
        gl_profile_tab[PROFILE_A_APP_ID].service_id.id.uuid.uuid.uuid16 = GATTS_SERVICE_UUID_TEST_A;

        esp_ble_gap_set_device_name(TEST_DEVICE_NAME);
#ifdef CONFIG_SET_RAW_ADV_DATA
        esp_ble_gap_config_adv_data_raw(raw_adv_data, sizeof(raw_adv_data));
        esp_ble_gap_config_scan_rsp_data_raw(raw_scan_rsp_data, sizeof(raw_scan_rsp_data));
#else
        esp_ble_gap_config_adv_data(&test_adv_data);
#endif
        esp_ble_gatts_create_service(gatts_if, &gl_profile_tab[PROFILE_A_APP_ID].service_id, GATTS_NUM_HANDLE_TEST_A);
        break;
    case ESP_GATTS_READ_EVT: {

		ESP_LOGI(GATTS_TAG, "GATT_READ_EVT, conn_id %d, trans_id %d, handle %d\n", param->read.conn_id, param->read.trans_id, param->read.handle);
        esp_gatt_rsp_t rsp;
        memset(&rsp, 0, sizeof(esp_gatt_rsp_t));
        rsp.attr_value.handle = param->read.handle;
        rsp.attr_value.len = 1;
        rsp.attr_value.value[0] = buf;
        esp_ble_gatts_send_response(gatts_if, param->read.conn_id, param->read.trans_id,
                                    ESP_GATT_OK, &rsp);
		printf("%d\n", buf);

       break;
    }
    case ESP_GATTS_WRITE_EVT: {					//文字を読み入れ
        ESP_LOGI(GATTS_TAG, "GATT_WRITE_EVT, conn_id %d, trans_id %d, handle %d\n", param->write.conn_id, param->write.trans_id, param->write.handle);
		buf = *(uint32_t *)param->write.value;				//この値をパソコンに伝送I2C
		uint8_t* data = (uint8_t*)malloc(1);
		cmd = i2c_cmd_link_create();
		wr_temp = 1;
		if (buf == 1)
			printf("mae\n");
		else if (buf == 2)
			printf("hidari\n");
		else if (buf == 3)
			printf("migi\n");
		else if (buf == 4)
			printf("usiro\n");

		ESP_LOGI(GATTS_TAG, "GATT_WRITE_EVT, value len %d, value %d come to string\n", param->write.len, buf);
		example_write_event_env(gatts_if, &a_prepare_write_env, param);

//		int ret = i2c_slave_read_buffer(I2C_EXAMPLE_SLAVE_NUM, data, RW_TEST_LENGTH, 10);
	//	printf("recive maseter %d\n", ret);
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
		if (wr_temp == 1) {
			printf("%d\n",i2c_reset_tx_fifo(I2C_EXAMPLE_SLAVE_NUM));							//fifo初期化
			data[0] = buf;
			i2c_slave_write_buffer(I2C_EXAMPLE_SLAVE_NUM, data, RW_TEST_LENGTH, 20);
		}

		wr_temp = 0;
		data[0] = 0;
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
	
		break;
    }
    case ESP_GATTS_EXEC_WRITE_EVT:
        ESP_LOGI(GATTS_TAG,"ESP_GATTS_EXEC_WRITE_EVT");
        esp_ble_gatts_send_response(gatts_if, param->write.conn_id, param->write.trans_id, ESP_GATT_OK, NULL);
        example_exec_write_event_env(&a_prepare_write_env, param);
        break;
    case ESP_GATTS_MTU_EVT:
    case ESP_GATTS_CONF_EVT:
    case ESP_GATTS_UNREG_EVT:
        break;
    case ESP_GATTS_CREATE_EVT:
        ESP_LOGI(GATTS_TAG, "CREATE_SERVICE_EVT, status %d,  service_handle %d\n", param->create.status, param->create.service_handle);
        gl_profile_tab[PROFILE_A_APP_ID].service_handle = param->create.service_handle;
        gl_profile_tab[PROFILE_A_APP_ID].char_uuid.len = ESP_UUID_LEN_16;
        gl_profile_tab[PROFILE_A_APP_ID].char_uuid.uuid.uuid16 = GATTS_CHAR_UUID_TEST_A;

        esp_ble_gatts_start_service(gl_profile_tab[PROFILE_A_APP_ID].service_handle);

        esp_ble_gatts_add_char(gl_profile_tab[PROFILE_A_APP_ID].service_handle, &gl_profile_tab[PROFILE_A_APP_ID].char_uuid,
                               ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE,
                               ESP_GATT_CHAR_PROP_BIT_READ | ESP_GATT_CHAR_PROP_BIT_WRITE | ESP_GATT_CHAR_PROP_BIT_NOTIFY, 
                               &gatts_demo_char1_val, NULL);
        break;
    case ESP_GATTS_ADD_INCL_SRVC_EVT:
        break;
    case ESP_GATTS_ADD_CHAR_EVT: {
        uint16_t length = 0;
        const uint8_t *prf_char;

        ESP_LOGI(GATTS_TAG, "ADD_CHAR_EVT, status %d,  attr_handle %d, service_handle %d\n",
                param->add_char.status, param->add_char.attr_handle, param->add_char.service_handle);
        gl_profile_tab[PROFILE_A_APP_ID].char_handle = param->add_char.attr_handle;
        gl_profile_tab[PROFILE_A_APP_ID].descr_uuid.len = ESP_UUID_LEN_16;
        gl_profile_tab[PROFILE_A_APP_ID].descr_uuid.uuid.uuid16 = ESP_GATT_UUID_CHAR_CLIENT_CONFIG;
        esp_ble_gatts_get_attr_value(param->add_char.attr_handle,  &length, &prf_char);

        ESP_LOGI(GATTS_TAG, "the gatts demo char length = %x\n", length);
        for(int i = 0; i < length; i++){
            ESP_LOGI(GATTS_TAG, "prf_char[%x] =%x\n",i,prf_char[i]);
        }
        esp_ble_gatts_add_char_descr(gl_profile_tab[PROFILE_A_APP_ID].service_handle, &gl_profile_tab[PROFILE_A_APP_ID].descr_uuid,
                                     ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, NULL, NULL);
        break;
    }
    case ESP_GATTS_ADD_CHAR_DESCR_EVT:
        ESP_LOGI(GATTS_TAG, "ADD_DESCR_EVT, status %d, attr_handle %d, service_handle %d\n",
                 param->add_char.status, param->add_char.attr_handle, param->add_char.service_handle);
        break;
    case ESP_GATTS_DELETE_EVT:
        break;
    case ESP_GATTS_START_EVT:
        ESP_LOGI(GATTS_TAG, "SERVICE_START_EVT, status %d, service_handle %d\n",
                 param->start.status, param->start.service_handle);
	    break;
    case ESP_GATTS_STOP_EVT:
        break;
    case ESP_GATTS_CONNECT_EVT: {
		
		esp_ble_conn_update_params_t conn_params = {0};
        memcpy(conn_params.bda, param->connect.remote_bda, sizeof(esp_bd_addr_t));
        conn_params.latency = 0;
        conn_params.max_int = 0x50;    // max_int = 0x50*1.25ms = 100ms
        conn_params.min_int = 0x30;    // min_int = 0x30*1.25ms = 60ms
        conn_params.timeout = 400;    // timeout = 400*10ms = 4000ms
        ESP_LOGI(GATTS_TAG, "ESP_GATTS_CONNECT_EVT, conn_id %d, remote %02x:%02x:%02x:%02x:%02x:%02x:, is_conn %d\n",
                 param->connect.conn_id,
                 param->connect.remote_bda[0], param->connect.remote_bda[1], param->connect.remote_bda[2],
                 param->connect.remote_bda[3], param->connect.remote_bda[4], param->connect.remote_bda[5],
                 param->connect.is_connected);
        gl_profile_tab[PROFILE_A_APP_ID].conn_id = param->connect.conn_id;

        //start sent the update connection parameters to the peer device.
        esp_ble_gap_update_conn_params(&conn_params);
		break;
    }
	case ESP_GATTS_DISCONNECT_EVT: {

		//	printf("file close test\n");						ここにI２C通信を止める
		//		fclose(test);
		esp_ble_gap_start_advertising(&test_adv_params);		//
		break;
	}
    case ESP_GATTS_OPEN_EVT:
    case ESP_GATTS_CANCEL_OPEN_EVT:
    case ESP_GATTS_CLOSE_EVT:
    case ESP_GATTS_LISTEN_EVT:
    case ESP_GATTS_CONGEST_EVT:
    default:
        break;
    }
}


//この関数の動作を確認する必要がある
static void gatts_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param)
{
    /* If event is register event, store the gatts_if for each profile */
    if (event == ESP_GATTS_REG_EVT) {
        if (param->reg.status == ESP_GATT_OK) {
            gl_profile_tab[param->reg.app_id].gatts_if = gatts_if;
        } else {
            ESP_LOGI(GATTS_TAG, "Reg app failed, app_id %04x, status %d\n",
                    param->reg.app_id, 
                    param->reg.status);
            return;
        }
    }
    /* If the gatts_if equal to profile A, call profile A cb handler,
     * so here call each profile's callback */
    do {
        int idx;
        for (idx = 0; idx < PROFILE_NUM; idx++) {
            if (gatts_if == ESP_GATT_IF_NONE || /* ESP_GATT_IF_NONE, not specify a certain gatt_if, need to call every profile cb function */
                    gatts_if == gl_profile_tab[idx].gatts_if) {
                if (gl_profile_tab[idx].gatts_cb) {
                    gl_profile_tab[idx].gatts_cb(event, gatts_if, param);
                }
            }
        }
    } while (0);
}

void app_main()
{
	int i2c_slave_port = I2C_EXAMPLE_SLAVE_NUM;
	i2c_config_t conf_slave;
	conf_slave.sda_io_num = I2C_EXAMPLE_SLAVE_SDA_IO;	//i2c slave data pin set
	conf_slave.sda_pullup_en = GPIO_PULLUP_ENABLE;
	conf_slave.scl_io_num = I2C_EXAMPLE_SLAVE_SCL_IO;	//i2c slave clock pin set
	conf_slave.scl_pullup_en = GPIO_PULLUP_ENABLE;
	conf_slave.mode = I2C_MODE_SLAVE;					//i2c slave mode
	conf_slave.slave.addr_10bit_en = 0;					//i2c slave address is 10bit or 7bit
	conf_slave.slave.slave_addr = ESP_SLAVE_ADDR;		//i2c slave is must have address

	i2c_param_config(i2c_slave_port, &conf_slave);
	i2c_driver_install(i2c_slave_port, conf_slave.mode,
		I2C_EXAMPLE_SLAVE_RX_BUF_LEN,
		I2C_EXAMPLE_SLAVE_TX_BUF_LEN, 0);


	esp_err_t ret;
	//i2c初期化
///////////////////////////////////////////////////////////////////////////////////////////////////////


	esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();

	ret = esp_bt_controller_init(&bt_cfg);
	if (ret) {
        ESP_LOGE(GATTS_TAG, "%s initialize controller failed\n", __func__);
        return;
    }

    ret = esp_bt_controller_enable(ESP_BT_MODE_BTDM);
    if (ret) {
        ESP_LOGE(GATTS_TAG, "%s enable controller failed\n", __func__);
        return;
    }

    ret = esp_bluedroid_init();
    if (ret) {
        ESP_LOGE(GATTS_TAG, "%s init bluetooth failed\n", __func__);
        return;
    }

    ret = esp_bluedroid_enable();
    if (ret) {
        ESP_LOGE(GATTS_TAG, "%s enable bluetooth failed\n", __func__);
        return;
    }

	wr_temp = 0;

    esp_ble_gatts_register_callback(gatts_event_handler);				//gatt service 登録
	esp_ble_gap_register_callback(gap_event_handler);					//gap service 登録
	esp_ble_gatts_app_register(PROFILE_A_APP_ID);						//登録されているgatt appを実行
    return;
}