本帖最后由 jf_11671167 于 2021-10-9 16:23 编辑
PHY6220 BLE SDK HRS 例程提供一个模拟心率服务的应用，发送数据到 手机APP端。 HRS Profile提供了标准心率服务，包含了心率测量、RR 区间、能量累计、皮肤接触等功能。本文将展示如何使用YoC蓝牙协议栈开发HRS应用的过程。HRS应用主要实现了蓝牙广播、建立连接以及心率数据推送的功能。PHY6220可以实现Nordic等大厂BLE芯片的功能，可以用来做蓝牙智能手表等。
BLE SDK来实现一个简单的HRS设备，APP只需关心：
SDK关于HRS的路径:PHY6220ble_sdk_phy6220_v1.0.0solu tionsble_hrs:
运行结果：
串口打印和APP同时实现数据传输。
视频如下：
https://v.youku.com/v_show/id_XNTgwOTAxMzI5Ng==
- /*
- * Copyright (C) 2019-2020 Alibaba Group Holding Limited
- */
- #include
- #include
- #include
- #include "aos/cli.h"
- #include "aos/ble.h"
- #include "app_main.h"
- #include "app_init.h"
- #include "pin_name.h"
- #include
- #define TAG "DEMO"
- #define DEVICE_NAME "YoC HRS"
- #define DEVICE_ADDR {0xCC,0x3B,0xE3,0x88,0xBF,0xC0}
- #define MEA_CHA_FLAG 0X00
- uint8_t g_hrs_mea_level = 0;
- int16_t g_conn_hanlde = 0xFFFF;
- int16_t adv_onging = 0;
- hrs_t g_hrs;
- hrs_handle_t g_hrs_handle = NULL;
- char node_name[40] = {0};
- static void conn_change(ble_event_en event, void *event_data)
- {
- evt_data_gap_conn_change_t *e = (evt_data_gap_conn_change_t *)event_data;
- if (e->connected == CONNECTED) {
- g_conn_hanlde = e->conn_handle;
- LOGI(TAG, "Connected");
- } else {
- g_conn_hanlde = 0xFFFF;
- LOGI(TAG, "Disconnected");
- adv_onging = 0;
- }
- }
- static void conn_param_update(ble_event_en event, void *event_data)
- {
- evt_data_gap_conn_param_update_t *e = event_data;
- LOGI(TAG, "LE conn param updated: int 0x%04x lat %d to %dn", e->interval,
- e->latency, e->timeout);
- }
- static void mtu_exchange(ble_event_en event, void *event_data)
- {
- evt_data_gatt_mtu_exchange_t *e = (evt_data_gatt_mtu_exchange_t *)event_data;
- if (e->err == 0) {
- LOGI(TAG, "mtu exchange, MTU %d", ble_stack_gatt_mtu_get(e->conn_handle));
- } else {
- LOGE(TAG, "mtu exchange fail, %d", e->err);
- }
- }
- static int event_callback(ble_event_en event, void *event_data)
- {
- LOGD(TAG, "event %x", event);
- switch (event) {
- case EVENT_GAP_CONN_CHANGE:
- conn_change(event, event_data);
- break;
- case EVENT_GAP_CONN_PARAM_UPDATE:
- conn_param_update(event, event_data);
- break;
- case EVENT_GATT_MTU_EXCHANGE:
- mtu_exchange(event, event_data);
- break;
- default:
- LOGD(TAG, "Unhandle event %x", event);
- break;
- }
- return 0;
- }
- static int start_adv(void)
- {
- int ret;
- ad_data_t ad[3] = {0};
- uint8_t flag = AD_FLAG_GENERAL | AD_FLAG_NO_BREDR;
- ad[0].type = AD_DATA_TYPE_FLAGS;
- ad[0].data = (uint8_t *)&flag;
- ad[0].len = 1;
- uint8_t uuid16_list[] = {0x0d, 0x18}; /* UUID_HRS */
- ad[1].type = AD_DATA_TYPE_UUID16_ALL;
- ad[1].data = (uint8_t *)uuid16_list;
- ad[1].len = sizeof(uuid16_list);
- ad[2].type = AD_DATA_TYPE_NAME_COMPLETE;
- ad[2].data = (uint8_t *)node_name;
- ad[2].len = strlen(node_name);
- adv_param_t param = {
- ADV_IND,
- ad,
- NULL,
- BLE_ARRAY_NUM(ad),
- 0,
- ADV_FAST_INT_MIN_1,
- ADV_FAST_INT_MAX_1,
- };
- ret = ble_stack_adv_start(¶m);
- if (ret) {
- LOGE(TAG, "hrs adv start fail %d!", ret);
- } else {
- LOGI(TAG, "hrs adv start!");
- adv_onging = 1;
- }
- return ret;
- }
- static ble_event_cb_t ble_cb = {
- .callback = event_callback,
- };
- int main()
- {
- uint8_t mea_data[2] = {0, 60};
- uint8_t mea_size = sizeof(mea_data) / sizeof(mea_data[0]);
- dev_addr_t addr = {DEV_ADDR_LE_RANDOM, DEVICE_ADDR};
- int length = 40, ret = -1;
- g_hrs_mea_level = 0;
- g_conn_hanlde = 0xFFFF;
- adv_onging = 0;
- g_hrs_handle = NULL;
- board_yoc_init();
- memset(node_name, 0X00, sizeof(node_name));
- LOGI(TAG, "Bluetooth HRS demo!");
- ret = aos_kv_get("HRS_NAME", node_name, &length);
- if (ret != 0 || strlen(node_name) == 0) {
- sprintf(node_name, DEVICE_NAME);
- }
- LOGI(TAG, "DEV_NAME:%s", node_name);
- init_param_t init = {
- .dev_name = NULL,
- .dev_addr = &addr,
- .conn_num_max = 1,
- };
- ble_stack_init(&init);
- ble_stack_event_register(&ble_cb);
- g_hrs_handle = hrs_init(&g_hrs);
- if (g_hrs_handle == NULL) {
- LOGE(TAG, "HRS init FAIL!!!!");
- return -1;
- }
- while (1) {
- if (!adv_onging) {
- ret = start_adv();
- if (ret != 0) {
- LOGI(TAG, "adv fail:%d", ret);
- return -1;
- }
- }
- mea_data[0] = MEA_CHA_FLAG;
- mea_data[1]++;
- ret = hrs_measure_level_update(g_hrs_handle, mea_data, mea_size);
- if (ret != 0) {
- LOGD(TAG, "update fail:%d", ret);
- }
- if (mea_data[1] > 180) {
- mea_data[1] = 60;
- }
- aos_msleep(1000);
- }
- return 0;
- }
app_main()，主要实现如下功能：
- 蓝牙协议栈的初始化，配置MAC地址及类型
- 注册蓝牙协议栈事件回调处理函数
- 开启广播
- 应用逻辑处理，间隔1秒更新心率数据至对端
蓝牙协议栈的事件是通过event_callback()回调函数上报，应用程序需要对这些事件进行相应的处理：
- 连接成功或失败事件
- 连接参数更新事件
- 处理对端发起的MTU协商请求
代码分析：
static int event_callback(ble_event_en event, void *event_data)
{ switch (event) { /* 连接成功或失败事件 */ case EVENT_GAP_CONN_CHANGE: conn_change(event, event_data); break; /* 连接参数更新事件 */ case EVENT_GAP_CONN_PARAM_UPDATE: conn_param_update(event, event_data); break; /* MTU协商事件 */ case EVENT_GATT_MTU_EXCHANGE: mtu_exchange(event, event_data); break; default: LOGD(TAG, "Unhandle event %x", event); break; } return 0;}蓝牙协议栈的事件是通过event_callback()回调函数上报，应用程序需要对这些事件进行相应的处理：连接成功或失败事件连接参数更新事件处理对端发起的MTU协商请求代码分析：static int event_callback(ble_event_en event, void *event_data){ switch (event) { /* 连接成功或失败事件 */ case EVENT_GAP_CONN_CHANGE: conn_change(event, event_data); break; /* 连接参数更新事件 */ case EVENT_GAP_CONN_PARAM_UPDATE: conn_param_update(event, event_data); break; /* MTU协商事件 */ case EVENT_GATT_MTU_EXCHANGE: mtu_exchange(event, event_data); break; default: LOGD(TAG, "Unhandle event %x", event); break; } return 0;}
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