Plotting the MPU Accelerometer values in real time

Question

Hi..! Friends..!
I am trying to detect the number of steps on accelerometer.
For which I want to Plot the accelerometer values in real time (with minimum rate 50values/sec) such that I can analyse the data while walking. 
 The ways in my mind are:- 
 
 Plotting on keil while debugging using logic analyzer but I am not able to implement 
 In UART Problem is the values printing are less than 50. 
 
 please anyone tell how can I solve the problem code is i.e. want to plot the l_a[i] variable of main loop 
 int main()
{
	uint32_t err_code;
 bool erase_bonds;
 int i=0;
 long count=0;
 uint8_t id;
 float l_xo,l_a[17];
 float s;
 float put_1,put_2,put_3,put_4,put_5,put_6,put_7,put_8,put_9,put_10,put_11,put_12,put_13,put_14,put_15,sum_5;
 int fre_count=1;
 // Initialize
 timers_init();
 buttons_leds_init(&erase_bonds);
 const app_uart_comm_params_t comm_params =
 {
 RX_PIN_NUMBER,
 TX_PIN_NUMBER,
 RTS_PIN_NUMBER,
 CTS_PIN_NUMBER,
 APP_UART_FLOW_CONTROL_DISABLED,
 false,
 UART_BAUDRATE_BAUDRATE_Baud9600
 };
 
 APP_UART_FIFO_INIT(&comm_params,
 UART_RX_BUF_SIZE,
 UART_TX_BUF_SIZE,
 uart_error_handle,
 APP_IRQ_PRIORITY_LOW,
 err_code);

 APP_ERROR_CHECK(err_code);
 
 twi_master_init();
 ble_stack_init();
 device_manager_init(erase_bonds);
 // gap_params_init();
 // advertising_init();
 conn_params_init();
 mpu6050_init(0x68);
 
	/*if(mpu6050_init(0x68) == false)
	{
 printf("mpu6050 init fail
");
	}*/
	mpu6050_register_read(0x75U, &id, 1);
	
 
 // Start execution.
 // err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
 // APP_ERROR_CHECK(err_code);

 // Enter main loop.
 for (;;)
 {
 /* power_manage();
 advertising_init(); // To Update advertising Packets
 MPU6050_ReadAcc( &tem1[0], &tem1[1] , &tem1[2] );
 //MPU6050_ReadGyro(&tem2[0] , &tem2[1] , &tem2[2] );
 now=tem1[0]/10000;	
 nrf_delay_ms(1000);
 if(flag2==1)// enters in this if timeout occurs or advertisement stops
 {
 if(flag==0)
 {
 prev=now;
 flag=1;
 }
 if(now!=prev)
 {
 err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
 APP_ERROR_CHECK(err_code);
 flag2=0; // stating that advertisement starts
 }
 prev=now;
 }	*/	

 MPU6050_ReadAcc( &tem1[0], &tem1[1], &tem1[2] );
 s = tem1[0]*tem1[0]+tem1[1]*tem1[1]+tem1[2]*tem1[2];
 
 if (fre_count==1)
 put_1=s;
 if (fre_count==2)
 put_2=s;
 if (fre_count==3)
 put_3=s;
 if (fre_count==4)
 put_4=s;
 if (fre_count==5)
 put_5=s;
 if (fre_count==6)
 put_6=s;
 if (fre_count==7)
 put_7=s;
 if (fre_count==8)
 put_8=s;
 if (fre_count==9)
 put_9=s;
 if (fre_count==10)
 put_10=s;
 if (fre_count==11)
 put_11=s;
 if (fre_count==12)
 put_12=s;
 if (fre_count==13)
 put_13=s;
 if (fre_count==14)
 put_14=s;
 if (fre_count>=15)
 put_15=s; 
 
 if (fre_count>=15)
 { 
 fre_count=16;
 sum_5 = ( put_1+put_2+put_3+put_4+put_5+put_6+put_7+put_8+put_9+put_10+put_11+put_12+put_13+put_14+put_15 )/15;
 l_a[i] = sum_5; 
 put_1 = put_2;
 put_2 = put_3;
 put_3 = put_4;
 put_4 = put_5;
 put_5 = put_6;
 put_6 = put_7;
 put_7 = put_8;
 put_8 = put_9;
 put_9 = put_10;
 put_10 = put_11;
 put_11 = put_12;
 put_12 = put_13;
 put_13 = put_14;
 put_14 = put_15;
 printf("%f, %d, %d
",l_a[i],i,count);
 if(i==15)
 {
 i=0;
 } 
 } 
 fre_count++;
 i++;	
 count++;
}
}