The Bluetooth device will receive data from CBT and PC will calculate PER and BER from received data.

Figure 7-3 Source: Code V4.0

1. Enable BLE mode:
   HCI_VS_LE_Enable 0xFD5B, 1, 1
2. Set the type of test to run
   PER_nBER = 1 (PER=1 or BER=0)
3. Set here the number of packets the tester transmits for PER measurements
   Tx_Packets = 1500
4. Set RX Frequency Channel 2402 + 2*k, where k is the channel (max val is 39)
   RX_Channel = 0 (same as k)
5. Set the RX Mode According to the options below (Default is "1"):

   # 0 - Normal mode, Open loop & no power saving

   # 1 - Wide window mode, Close loop & no power saving

   # 2 - Continuous RX, Open loop before SYNC

   # 3 - Wide window & power saving mode, Close loop & power saving
   RX_Mode = 1

6. Set the RX Access Code to Sync on (Default is 0x71764129)
   RX_AC = 0x71764129
7. Set payload type

   # 0 - PRBS 9

   # 1 - FOFO

   # 2 - ZOZO

   # 3 - PRBS 15

   # 4 - All Ones

   # 5 - All Zeros

   # 6 - OFOF

   # 7 - OZOZ
   PayloadType = 0x00

8. Set length of packet fields in Bytes
   Header_Length = 2 Payload_Length = 37 CRC_Length = 3
9. Set CRC for PRBS9 with 37 Bytes length
   CRC_Value = 0x00E221E8
10. When traces are enabled than the Cortex is not able receive the next packet
    En_Traces = 0
11. Set the amount of bad bits/packet to identify FA (in percent) and set Enable_BER

    FA_THR_inPer = 7
    Total_Bits_in_packet = 8 * (Header_Length + Payload_Length + CRC_Length)
    FA_THR_inBits = round((FA_THR_inPer/100) * Total_Bits_in_packet)
    
    if (PER_nBER == 1) then
    	Enable_BER = 0
    else
    	Enable_BER = 1
    endif
    

12. Clear Sync Counter
    HCI_VS_Write_Hardware_Register 0xFF01, 0x0019324E, 0x0
    Outgoing Dump: 01 01 ff 06 4e 32 19 00 00 00
    Incoming Event: 04 0e 04 01 01 ff 00 (Command Complete Event)
13. Update Parameters
    

    HCI_VS_Set_LE_Test_Mode_Parameters 0xFD77, 0x01, RX_Mode, 0, RX_AC, Enable_BER, PayloadType, Payload_Length, FA_THR_inBits, En_Traces, CRC_Value
    HCI_VS_Set_LE_Test_Mode_Parameters 0xFD77, 0x01, x01, 0x0000, 0x71764129(RX_AC), 0x00(Enable_BER), 0x00(PayloadType), 0x25(Payload_Length), 0x18(FA_THR_inBits), 0x00(En_Traces), 0x00E221E8 (CRC)

14. Start RX Scan
    HCI_BLE_Receiver_Test 0x201d, RX_Channel

    Pause here and send data packets from the CBT Tester. Continue with scripts after sending all the packets.

15. If testing for PER:
    if (PER_nBER == 1) then
    HCI_BLE_Test_End 0x201f

    Returns number of packets recieved, save into &Rx_Packets.

16. Read Phy - Sync Counter Value
    HCI_VS_Read_Hardware_Register 0xFF00, 0x0019324E
    Outgoing Dump: 01 00 ff 04 4e 32 19 00
    Incoming Event: 04 0e 06 01 00 ff 00 0a 00 (Command Complete Event, Value: 0x000A)

    Returns Sync Counter Value, save into &Sync_Counter.

17. Calculate PER = 100*(Tx_Packets - Rx_Packets)/Tx_Packets
18. For BER:
    else
    HCI_BLE_Test_End 0x201f

    Returns number of packets recieved, save into &Rx_Packets.

19. Read BER Results
    Hci_VS_LE_Read_Ber_Test_Results 0xFDAE

    Vendor-Specific LE_Read_Ber_Test_Results Command Complete parameters:

20. Read Phy - Sync Counter Value
    HCI_VS_Read_Hardware_Register 0xFF00, 0x0019324E
    Outgoing Dump: 01 00 ff 04 4e 32 19 00
    Incoming Event: 04 0e 06 01 00 ff 00 0a 00 (Command Complete Event, Value: 0x000A)

    Returns Sync Counter Value, save into &Sync_Counter.

21. Calculate Actual Syncs
    Actual_Syncs = BER_Syncs - FA_Events
22. Calculate BER:

    # Bit Counters
    Total_Bad_Bits = Htype_Bad_Bits + Hlength_Bad_Bits + Ppart1_Bad_Bits + Ppart2_Bad_Bits + Ppart3_Bad_Bits + Ppart4_Bad_Bits + CRC_Bad_Bits
    Dropped_Packets = Actual_Syncs - Total_Good_Packets
    Detected_Packets = Actual_Syncs
    Total_Received_Bits = Total_Bits_in_packet * Detected_Packets
    
    if(Total_Received_Bits == 0) then
    BER = 100
    else
    BER = 100*(Total_Bad_Bits / Total_Received_Bits)
    endif