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Circle Pad Pro: Difference between revisions

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Wwylele (talk | contribs)
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0x10 is my typo and thanks. But I don't see the point of blindly merging unknown fields
→Request 2: Read Calibration Data?: Add calibration data format
 
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Communications with this device is done via the [[IR_Services|ir:USER]] service, which uses obfuscation implemented in software. The [[IRU:SetBitRate|bitrate-value]] passed to IRUSER is 0x04, hence the actual bps is 96000.
Communications with this device is done via the [[IR_Services|ir:USER]] service, which uses obfuscation implemented in software. The [[IRU:SetBitRate|bitrate-value]] passed to IRUSER is 0x04, hence the actual bps is 96000.


The application sends requests via [[IRUSER:SendIrnop]] and receives response from Circle Pad Pro via [[IRUSER:ReceiveIrnop]] (or read data from the [[IRUSER_Shared_Memory|shared memory]]). The request and response data structures below are payloads in packets.
The application sends requests via [[IRUSER:SendIrnop]] and receives response from Circle Pad Pro via [[IRUSER:ReceiveIrnop]] (or read data from the [[IRUSER_Shared_Memory|shared memory]]). The request and response data structures below are payloads in packets. Each request begins with a one-byte ID that determines the request type.


=== Read Input ===
=== Request 1: Read Input ===


Request (3 bytes):
Request (3 bytes):
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|}
|}


=== Read Calibration Data? ===
=== Request 2: Read Calibration Data? ===


Request (6 bytes):
Request (6 bytes):
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| 0x2
| 0x2
| 0x2
| 0x2
| Data offset? (aligned to 0x10?)
| Data offset (aligned to 0x10)
|-
|-
| 0x4
| 0x4
| 0x2
| 0x2
| Data size (aligned to 0x10?)
| Data size (aligned to 0x10)
|}
|}


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| 0x1
| 0x1
| 0x2
| 0x2
| Unknown. Same as request+0x2
| Data offset. Same as Request+0x2
|-
|-
| 0x3
| 0x2
| 0x2
| Data size. Same as Request+0x4
|-
| 0x5
| data size
| calibration data
|}
Calibration data:
{| class="wikitable" border="1"
|-
!  offset
!  Size
!  Description
|-
| 0x0
| 0x1
| Unknown
|-
| 0x1
| 0x3
| Right circle pad offset.
These three bytes are two little-endian 12-bit fields. The lower one is for x-axis and the upper one is for y-axis.
|-
| 0x4
| 0x4
| Right circle pad x-axis scale factor (floating-point).
|-
| 0x8
| 0x4
| Right circle pad y-axis scale factor (floating-point).
|-
| 0xC
| 0x3
| Unknown
|-
| 0xF
| 0x1
| [[CRC-8-CCITT]] over data above
|}
The Circle Pad Pro contains many sets of calibration data. Sets with an invalid CRC checksum should be ignored.
To calculate the right circle pad's position, first subtract the calibration offset from the value reported in the "Read Input" request, then multiply by the scaling factor. Dividing the result by 8 gives a value with a similar range to that of the left circle pad: -0x9C(bottom/left) - 0x9C(top/right).
=== Request 3 ===
Request (22 bytes?):
{| class="wikitable" border="1"
|-
!  offset
!  Size
!  Description
|-
| 0x0
| 0x1
| Request ID (fixed value 3)
|-
| 0x1
| 0x1
| Expected response time in ms?
|-
| 0x2
| ...
| ?
|}
Response (2 bytes?):
{| class="wikitable" border="1"
|-
!  offset
!  Size
!  Description
|-
| 0x0
| 0x1
| Response ID? Fixed value 0x12
|-
| 0x1
| 0x1
| 0?
|}
=== Request 4: Reset Calibration Data? ===
Request (3 bytes?):
{| class="wikitable" border="1"
|-
!  offset
!  Size
!  Description
|-
| 0x0
| 0x1
| Request ID (fixed value 4)
|-
| 0x1
| 0x1
| Expected response time in ms?
|-
| 0x2
| 0x2
| Data size
| 0x1
| ?
|}
 
 
Response (2 bytes?):
{| class="wikitable" border="1"
|-
|-
| 0x4
!  offset
| data size
!  Size
| calibration data?
!  Description
|-
| 0x0
| 0x1
| Response ID? Fixed value 0x13
|-
| 0x1
| 0x1
| 0?
|}
 
=== Request 5 ===
Request (2 bytes):
{| class="wikitable" border="1"
|-
!  offset
!  Size
!  Description
|-
| 0x0
| 0x1
| Request ID (fixed value 5)
|-
| 0x1
| 0x1
| Expected response time in ms?
|}
 
 
Response (2 bytes?):
{| class="wikitable" border="1"
|-
!  offset
!  Size
!  Description
|-
| 0x0
| 0x1
| Response ID? Fixed value 0x14
|-
| 0x1
| 0x1
| ?
|}
|}
Retrieved from "https://www.3dbrew.org/wiki/Circle_Pad_Pro"