Editing DS4-BT

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In comparison, USB has 250x (4ms)
In comparison, USB has 250x (4ms)


=== Overlapping channels BT/Wi-Fi ===
=== Overlapping channels BT/WiFi ===
* [[Bluetooth#Overlapping_channels_BT.2FWiFi|Overlapping channels BT/WiFi]]


* [[Wireless#Overlapping_channels_BT.2FWi-Fi|Overlapping channels BT/Wi-Fi]]
=== Bluetooth Adressing ===
 
=== Bluetooth Addressing ===


Each Bluetooth unit has a unique 48-bit address (BD_ADDR).
Each Bluetooth unit has a unique 48-bit address (BD_ADDR).
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**0x0100: L2CAP
**0x0100: L2CAP
*0x0800: Maximum Attribute Byte count (2048)?
*0x0800: Maximum Attribute Byte count (2048)?
*0x3505: Data element (Type descriptor: 6, Size index: 5) 5 bytes
*0x0A: Data element (type:1, Size index: 2 (4 bytes)
**0x0A: Data element (type:1, Size index: 2 (4 bytes))
**0x0000FFFF: Attribute ID list
**0x0000FFFF: Attribute ID list
*0x00: Continuation State
*0x00: Continuation State
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===== 0x01 =====
===== 0x01 =====
The transaction type is DATA (0x0a), and the report type is INPUT (0x01).
The transaction type is DATA (0x0a), and the report type is INPUT (0x01).
The protocol code is 0x01.
The protocol code is 0x11.


This report is sent until the GET REPORT FEATURE 0x02 is received.
This report is sent until the GET REPORT FEATURE 0x02 is received.
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|-
|-
|[16 - 17]
|[16 - 17]
|colspan="8"|Angular velocity X
|colspan="8"|Acceleration X
|-
|-
|[18 - 19]
|[18 - 19]
|colspan="8"|Angular velocity Y
|colspan="8"|Acceleration Y
|-
|-
|[20 - 21]
|[20 - 21]
|colspan="8"|Angular velocity Z
|colspan="8"|Acceleration Z
|-
|-
|[22 - 23]
|[22 - 23]
|colspan="8"|Acceleration X
|colspan="8"|Gyroscope Roll?
|-
|-
|[24 - 25]
|[24 - 25]
|colspan="8"|Acceleration Y
|colspan="8"|Gyroscope Yaw?
|-
|-
|[26 - 27]
|[26 - 27]
|colspan="8"|Acceleration Z
|colspan="8"|Gyroscope Pitch?
|-
|-
|[28 - 32]
|[28 - 32]
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The protocol code is 0x11.
The protocol code is 0x11.


First bit at byte 2 specifies whether to enable control. Byte at index 4 specifies which individual control to enable.
Byte at index 4 changes from 0xf0 to 0xf3 in the first reports. Making it always 0xf0 does not seem to change something.


Report example:
Report example:
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  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, <span style="background:lime">0xd8, 0x8e, 0x94, 0xdd</span>
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, <span style="background:lime">0xd8, 0x8e, 0x94, 0xdd</span>
Speculation:
0x11 may be not a packet ID but encoded packet size.
Lower digit (0x01) satisfies formula: '''((packet_size - 15) >> 6) + 1'''
(packet_size does not include '0xa2'; >> - bit shift right - equivalent to integer division by 64)
This formula seems to work for all packets (0x11..0x18).
Packet 0x19 looks like clamped by max packet size.


{| class="wikitable"
{| class="wikitable"
Line 936: Line 927:
|colspan="8"|'''0x11'''
|colspan="8"|'''0x11'''
|-
|-
|[2]
|[2 - 3]
|colspan="1"|Controls
|colspan="7"|Unknown
|-
|[3]
|colspan="8"|Unknown
|colspan="8"|Unknown
|-
|-
|[4]
|[4]
|colspan="4"|0x0f
|colspan="8"|0xf0 disables the rumble motors, 0xf3 enables them
|colspan="1"|Unknown
|colspan="1"|Flash
|colspan="1"|Color
|colspan="1"|Rumble
|-
|-
|[5 - 6]
|[5 - 6]
Line 1,595: Line 1,578:
|}
|}


The sequence is 1040 bytes long with the following structure:
The packets with report counter from 0x00 to 0x09 carry 528 bytes of data.<br />
 
Packet 0x09 contains 24 bytes of data and is padded with zeros.<br />
<pre>
The packets with report counter from 0x0a to 0x0c are padded with zeros.<br />
struct ds4_response {
Packet 0x0d is padded with zeros, except bytes 58 and 60 (both are 0x01).<br />
unsigned char signature[0x100];
The packets with report counter from 0x0e to 0x12 carry 256 bytes of data.<br />
unsigned char serial_num[0x10];
Packet 0x12 contains 32 bytes of data and is padded with zeros.<br />
unsigned char n[0x100];
unsigned char e[0x100];
unsigned char casig[0x100];
};
</pre>
 
<u>signature</u> - is a PSS signature of the nonce, signed with DS4's private key<br>
<u>serial_num</u> - is the controller/cert serial number<br>
<u>n</u> - DS4's Public Key prime<br>
<u>e</u> - DS4's Public Key exponent<br>
<u>casig</u> - is a PSS signature (signed by Sony's CA private key) of the <u>serial_num</u>, <u>n</u> and <u>e</u><br>
 
The last (19th) packet is padded with 24 bytes.


====== 0xF2 ======
====== 0xF2 ======
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