Ble stack server receiverlink loss

Question

But in button event handler. 
 i want data to read from eeprom through i2c bus. and send it 
 through bluetooth stack for every press of buuton 0. 
 but in master control panel ,its says bluetooth connection loss ,once i press button 0. 
 Kindly tell me is it not possible to access i2c in button even handler. 
 static void button_event_handler(uint8_t pin_no)
{
switch (pin_no)
{
case HR_INC_BUTTON_PIN_NO: 
 //m_cur_heart_rate += HEART_RATE_CHANGE;
m_cur_heart_rate = data2;
dataW1[0]=dataW1[0]+2;
twi_master_transfer(addw, dataW1, 2, 1);
twi_master_transfer(addr, data1, 2, 0);
data2=(data1[0]<<4)|(data1[1]);
break; 
 case HR_DEC_BUTTON_PIN_NO: 
 //m_cur_heart_rate -= HEART_RATE_CHANGE;
//if (m_cur_heart_rate < MIN_HEART_RATE)
// {
// m_cur_heart_rate = MAX_HEART_RATE; // Loop back
// }
break; 
 default:
APP_ERROR_HANDLER(pin_no);
}
}

Hung Bui · Accepted Answer

Hi Balaji, 
 Could you send us your project files ? 
 It should be noted that, when you use twi_hw_master_SD_4_4.c, the softdevice must be enabled before otherwise the sd_ppi_* calls will have no effect and may cause errors.