1.DA14531简介

DA14531是基于全球尺寸最小、功耗最低的蓝牙5.1系统级芯片(SOC)，最小尺寸1.7X2.05x0.5mm，功耗23.75uA/MHz且TX发射电流3.5 mA，所属行业最低，它应用范围广泛，特别是在功耗和封装都要求比较高的场合。

2.蓝牙传感器开发

工程路径：\Source\DA14531\projects\target_apps\ble_examples\ble_app_peripheral
固件输出路径：Source\DA14531\projects\target_apps\ble_examples\ble_app_peripheral\Keil_5\out_DA14531\Output\ DA14531_Sensor.bin
传感器特性：

名称	范围 默认参数
系统	①低功耗系统 ②非低功耗系统
功耗	不广播状态 1uA
广播状态200ms	0.14mA
广播间隔时间：	间隔广播（20ms-2000ms）
广播数据：	设备名称 “Sensor”
制造商数据：	FF
前两字节公司ID	FFC1
A数据（uint16_t）	1001
B数据（uint16_t）	2001
C数据（uint16_t）	3001
D数据（uint16_t）	4001
E数据（uint16_t）	5001
F数据（uint16_t）	6001
G数据（uint16_t）	7001

3.主要用户应用代码

3.1.传感器数据结构体

typedef struct
{
uint16_t SensorA;
uint16_t SensorB;
uint16_t SensorC;
uint16_t SensorD;
uint16_t SensorE;
uint16_t SensorF;
uint16_t SensorG;
}Sensor_Data_t;

3.2.配置广播间隔

1）#include “user_config.h” 中
/// Minimum interval for advertising
.intv_min = MS_TO_BLESLOTS(200), // 200ms

/// Maximum interval for advertising
.intv_max = MS_TO_BLESLOTS(200),                    // 200ms

2）配置设备名称：#define USER_DEVICE_NAME “Sensor”
配置公司ID #define USER_COMPANY_ID 0xFFC1

3.3.主要用户代码说明

3.3.1.主要函数接口

函数接口 说明
user_app_adv_undirect_complete() 广播完成回调函数
user_app_on_db_init_complete() BLE数据库初始化完成回调函数
user_app_adv_start() 开启广播函数
user_app_adv_stop() 关闭广播函数
app_easy_gap_undirected_advertise_start_create_msg 广播数据接口
user_RsfreshSensorData() 传感器数据刷新
user_app_before_sleep() 睡眠前回调函数
user_app_resume_from_sleep() 唤醒时回调函数

3.3.2.打印MAC地址

#if defined (DA14531)
extern struct bd_addr dev_bdaddr;
uint8_t bd_address[6] = CFG_NVDS_TAG_BD_ADDRESS;

arch_printf("OTP addr: %02x %02x %02x %02x %02x %02x\r\n",dev_bdaddr.addr[0],dev_bdaddr.addr[1],dev_bdaddr.addr[2],dev_bdaddr.addr[3],dev_bdaddr.addr[4],dev_bdaddr.addr[5]);arch_printf("nvds addr: %02x %02x %02x %02x %02x %02x\r\n",bd_address[0],bd_address[1],bd_address[2],bd_address[3],bd_address[4],bd_address[5]);

#endif
arch_printf(“main_loop\r\n”);

3.3.3.低功耗模式

设置为低功耗模式：
arch_set_sleep_mode(ARCH_EXT_SLEEP_ON);
设置为正常模式：
arch_set_sleep_mode(ARCH_SLEEP_OFF);

3.3.4.广播数据底层配置

        uint8_t dev_name_len = 0;uint8_t dev_manu_len = 0;uint8_t adv_data_len = 0;uint8_t scan_rsp_data_len = 0;uint8_t adv_data[31];uint8_t scan_rsp_data[31];// Device Namedev_name_len = strlen(USER_DEVICE_NAME);dev_manu_len = sizeof(device_info.manu);arch_printf("adv_name:%s\r\n",USER_DEVICE_NAME);adv_data_len = 0;if(dev_name_len){adv_data[adv_data_len + 0] = dev_name_len + 1;adv_data[adv_data_len + 1] = GAP_AD_TYPE_COMPLETE_NAME;memcpy(&adv_data[adv_data_len +2],USER_DEVICE_NAME,dev_name_len);adv_data_len += dev_name_len + 2;}if(dev_manu_len){adv_data[adv_data_len + 0] = dev_manu_len + 1;adv_data[adv_data_len + 1] = GAP_AD_TYPE_MANU_SPECIFIC_DATA;memcpy(&adv_data[adv_data_len +2],device_info.manu,dev_manu_len);adv_data_len += dev_manu_len + 2;}adv_cmd->info.host.adv_data_len = adv_data_len;memcpy(&(cmd->info.host.adv_data[0]), adv_data, adv_data_len);arch_printf("adv_data_len:%d\r\n",adv_data_len);show_reg(adv_data,adv_data_len,1);adv_cmd->info.host.scan_rsp_data_len = scan_rsp_data_len;memcpy(&(cmd->info.host.scan_rsp_data[0]), scan_rsp_data, scan_rsp_data_len);//arch_printf("scan_rsp_data_len:%d\r\n",scan_rsp_data_len);//show_reg(scan_rsp_data,scan_rsp_data_len,1);

3.3.5.刷新传感器数据

static void user_RsfreshSensorData(void)
{
///arch_printf(“Rsf\r\n”);

// 获取传感器信息
Sensor.SensorA++;
Sensor.SensorB++;
Sensor.SensorC++;
Sensor.SensorD++;
Sensor.SensorE++;
Sensor.SensorF++;
Sensor.SensorG++;// 更新数据
User_data.CycleTime++;
if(User_data.CycleTime>=5)
{User_data.CycleTime = 0;if(memcmp(&Sensor,&bacSensor,sizeof(Sensor))){device_info.manu[0] =(uint8_t)USER_COMPANY_ID;device_info.manu[1] =(uint8_t)(USER_COMPANY_ID>>8);device_info.manu[2] =Sensor.SensorA;device_info.manu[3] =Sensor.SensorA;device_info.manu[4] =Sensor.SensorB;device_info.manu[5] =Sensor.SensorB;device_info.manu[6] =Sensor.SensorC;device_info.manu[7] =Sensor.SensorC;device_info.manu[8] =Sensor.SensorD;device_info.manu[9] =Sensor.SensorD;device_info.manu[10] =Sensor.SensorE;device_info.manu[11] =Sensor.SensorE;device_info.manu[12] =Sensor.SensorF;device_info.manu[13] =Sensor.SensorF;device_info.manu[14] =Sensor.SensorG;device_info.manu[15] =Sensor.SensorG;user_app_adv_stop(); // 停止广播后，会重新开启广播 请看}
}

}