/**@briefFunctionforhandlingtheConnectevent.
*@param[in]p_hrsHeartRateServicestructure.
*@param[in]p_ble_evtEventreceivedfromtheBLEstack.
staticvoidon_connect（ble_hrs_t*p_hrs,ble_evt_t*p_ble_evt）
{
p_hrs->conn_handle=p_ble_evt->evt.gap_evt.conn_handle;
}
/**@briefFunctionforhandlingtheDisconnectevent.
*
*@param[in]p_hrsHeartRateServicestructure.
*@param[in]p_ble_evtEventreceivedfromtheBLEstack.
staticvoidon_disconnect（ble_hrs_t*p_hrs,ble_evt_t*p_ble_evt）
{
UNUSED_PARAMETER（p_ble_evt）;
p_hrs->conn_handle=BLE_CONN_HANDLE_INVALID;
}
/**@briefFunctionforhandlingwriteeventstotheHeartRateMeasurementcharacteristic.
*@param[in]p_hrsHeartRateServicestructure.
*@param[in]p_evt_writeWriteeventreceivedfromtheBLEstack.
*/
staticvoidon_hrm_cccd_write（ble_hrs_t*p_hrs,ble_gatts_evt_write_t*p_evt_write）
{
if（p_evt_write->len==2）
{
//CCCDwritten,updatenotificationstate
if（p_hrs->evt_handler!
=NULL）
{
ble_hrs_evt_tevt;
if（ble_srv_is_notification_enabled（p_evt_write->data））
{
evt.evt_type=BLE_HRS_EVT_NOTIFICATION_ENABLED;
}
else
{
evt.evt_type=BLE_HRS_EVT_NOTIFICATION_DISABLED;
}
p_hrs->evt_handler（p_hrs,&evt）;
}
}
}
/**@briefFunctionforhandlingtheWriteevent.
*
*@param[in]p_hrsHeartRateServicestructure.
*@param[in]p_ble_evtEventreceivedfromtheBLEstack.
*/
staticvoidon_write（ble_hrs_t*p_hrs,ble_evt_t*p_ble_evt）
{
ble_gatts_evt_write_t*p_evt_write=&p_ble_evt->evt.gatts_evt.params.write;
if（p_evt_write->handle==p_hrs->hrm_handles.cccd_handle）
{
on_hrm_cccd_write（p_hrs,p_evt_write）;
}
}
voidble_hrs_on_ble_evt（ble_hrs_t*p_hrs,ble_evt_t*p_ble_evt）
{
switch（p_ble_evt->header.evt_id）
{
caseBLE_GAP_EVT_CONNECTED:
on_connect（p_hrs,p_ble_evt）;
break;
caseBLE_GAP_EVT_DISCONNECTED:
on_disconnect（p_hrs,p_ble_evt）;
break;
caseBLE_GATTS_EVT_WRITE:
on_write（p_hrs,p_ble_evt）;
break;
default:
//Noimplementationneeded.
break;
}
}
/**@briefFunctionforencodingaHeartRateMeasurement.
*
*@param[in]p_hrsHeartRateServicestructure.
*@param[in]heart_rateMeasurementtobeencoded.
*@param[out]p_encoded_bufferBufferwheretheencodeddatawillbewritten.
*
*@returnSizeofencodeddata.
*/
staticuint8_thrm_encode（ble_hrs_t*p_hrs,uint16_theart_rate,uint8_t*p_encoded_buffer）
{
uint8_tflags=0;
uint8_tlen=1;
inti;
//Setsensorcontactrelatedflags
if（p_hrs->is_sensor_contact_supported）
{
flags|=HRM_FLAG_MASK_SENSOR_CONTACT_SUPPORTED;
}
if（p_hrs->is_sensor_contact_detected）
{
flags|=HRM_FLAG_MASK_SENSOR_CONTACT_DETECTED;
}
//Encodeheartratemeasurement
if（heart_rate>0xff）
{
flags|=HRM_FLAG_MASK_HR_VALUE_16BIT;
len+=uint16_encode（heart_rate,&p_encoded_buffer[len]）;
}
else
{
p_encoded_buffer[len++]=（uint8_t）heart_rate;
}
//Encoderr_intervalvalues
if（p_hrs->rr_interval_count>0）
{
flags|=HRM_FLAG_MASK_RR_INTERVAL_INCLUDED;
}
for（i=0;irr_interval_count;i++）
{
if（len+sizeof（uint16_t）>MAX_HRM_LEN）
{
//Notallstoredrr_intervalvaluescanfitintotheencodedhrm,
//movetheremainingvaluestothestartofthebuffer.
memmove（&p_hrs->rr_interval[0],
&p_hrs->rr_interval[i],
（p_hrs->rr_interval_count-i）*sizeof（uint16_t））;
break;
}
len+=uint16_encode（p_hrs->rr_interval[i],&p_encoded_buffer[len]）;
}
p_hrs->rr_interval_count-=i;
//Addflags
p_encoded_buffer[0]=flags;
returnlen;
}
/**@briefFunctionforaddingtheHeartRateMeasurementcharacteristic.
*
*@param[in]p_hrsHeartRateServicestructure.
*@param[in]p_hrs_initInformationneededtoinitializetheservice.
*
*@returnNRF_SUCCESSonsuccess,otherwiseanerrorcode.
*/
staticuint32_theart_rate_measurement_char_add（ble_hrs_t*p_hrs,
constble_hrs_init_t*p_hrs_init）
{
ble_gatts_char_md_tchar_md;
ble_gatts_attr_md_tcccd_md;
ble_gatts_attr_tattr_char_value;
ble_uuid_tble_uuid;
ble_gatts_attr_md_tattr_md;
uint8_tencoded_initial_hrm[MAX_HRM_LEN];
memset（&cccd_md,0,sizeof（cccd_md））;
BLE_GAP_CONN_SEC_MODE_SET_OPEN（&cccd_md.read_perm）;
cccd_md.write_perm=p_hrs_init->hrs_hrm_attr_md.cccd_write_perm;
cccd_md.vloc=BLE_GATTS_VLOC_STACK;
memset（&char_md,0,sizeof（char_md））;
char_md.char_props.notify=1;
char_md.p_char_user_desc=NULL;
char_md.p_char_pf=NULL;
char_md.p_user_desc_md=NULL;
char_md.p_cccd_md=&cccd_md;
char_md.p_sccd_md=NULL;
BLE_UUID_
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