手把手教你:BLE从机如何发送指示给到手机APP

//// Battery attribute valuesstatic const u8 my_batCharVal[5] = {    CHAR_PROP_READ | CHAR_PROP_NOTIFY | CHAR_PROP_INDICATE,    U16_LO(BATT_LEVEL_INPUT_DP_H), U16_HI(BATT_LEVEL_INPUT_DP_H),    U16_LO(CHARACTERISTIC_UUID_BATTERY_LEVEL), U16_HI(CHARACTERISTIC_UUID_BATTERY_LEVEL)};

voidsend_battery_value_to_app(){    static unsigned int clock_cnt = 0;    static unsigned char value = 0;    if(clock_time_exceed(clock_cnt, 1000000)){        clock_cnt = clock_time();        value++;        // blc_gatt_pushHandleValueNotify (BLS_CONN_HANDLE, BATT_LEVEL_INPUT_DP_H, (u8 *)&value, 1);        blc_gatt_pushHandleValueIndicate(BLS_CONN_HANDLE, BATT_LEVEL_INPUT_DP_H, (u8 *)&value, 1);    }}

/** * @brief      This function is used to indicate the Characteristic Value from a server to a client. * @param[in]  connHandle -  connection handle * @param[in]  attHandle - attribute handle. * @param[in]  p -  data buffer pointer * @param[in]  len - data byte number * @return     Status - 0x00: command succeeded; 0x01-0xFF: command failed */ble_sts_t   blc_gatt_pushHandleValueIndicate(u16 connHandle, u16 attHandle, u8 *p, int len);

/** * @brief   LE connection handle for slave & master role *          Telink single connection SDK support only one ACL Slave or only one Master connection, *          We use constant connection handle value for them in controller to simplify design and development, *          so user can use these two connection handle directly. *          attention: If using Telink multiple connection SDK, connection handle must be managed dynamically !!! */#define         BLM_CONN_HANDLE                                 0x0080  //ACL Master connection handle#define         BLS_CONN_HANDLE                                 0x0040  //ACL Slave connection handle

#if (UART_PRINT_DEBUG_ENABLE)    #define DEBUG_INFO_TX_PIN               GPIO_PB2    #define PULL_WAKEUP_SRC_PB2             PM_PIN_PULLUP_10K    #define PB2_OUTPUT_ENABLE               1    #define PB2_DATA_OUT                    1#endif

unsigned char rec_confirm_inf_cnt = 0;voidsend_battery_value_to_app(){    static unsigned int clock_cnt = 0;    static unsigned char value = 0;    if(clock_time_exceed(clock_cnt, 1000000)){        clock_cnt = clock_time();        if(blc_ll_getCurrentState() == BLS_LINK_STATE_CONN)        {            printf("send cnt = %d,rec cnt = %d\n",value,rec_confirm_inf_cnt);            value++;            blc_gatt_pushHandleValueIndicate(BLS_CONN_HANDLE, BATT_LEVEL_INPUT_DP_H, (u8 *)&value, 1);        }    }}

/** * @brief      this function is used to get LE stack current state * @param[in]  none. * @return     BLE link layer state: *                  BLS_LINK_STATE_IDLE *                  BLS_LINK_STATE_ADV *                  BLS_LINK_STATE_SCAN *                  BLS_LINK_STATE_INIT *                  BLS_LINK_STATE_CONN */u8          blc_ll_getCurrentState(void);