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Logitech USB steering wheel (view source)
Revision as of 05:17, 19 November 2010
, 05:17, 19 November 2010→On Air Data
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==On Air Data==
==On Air Data==
−The Force Feedback configuration is sent continuously over the wireless link, which takes the form of a 31 byte payload. These are seen on the SPI bus as they are sent to the RF24L01 output buffer (register 0xA0). The format is as follows:
+The Force Feedback configuration is sent continuously over the wireless link, which takes the form of a 31 byte payload. These are seen on the SPI bus as they are sent to the RF24L01 output buffer (register 0xA0).
+<code>
+ [0xA0(0x0E)0x2F(0x00)0x1B(0x00)0x40(0x00)0x03(0x00)0x00(0x00)0x7D(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0xFF(0x00)0x00(0x00)0x7F(0x00)0x7F(0x00)0x77(0x00)0x00(0x00)0x7F(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0x00(0x00)0x33(0x00)0x5A(0x00)0xC0(0x00)]
+</code>
+The format is as follows:
: Bytes 1..2 - Negotiated SubChannel Address
: Bytes 1..2 - Negotiated SubChannel Address
: Byte 3 - Packet Ack 'dongle->wheel' (0x40 saw packet, 0x80 missed packet, 0x20 awaiting sync, 0x07..0x04 sync received, 0x10 sync now).
: Byte 3 - Packet Ack 'dongle->wheel' (0x40 saw packet, 0x80 missed packet, 0x20 awaiting sync, 0x07..0x04 sync received, 0x10 sync now).
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: Bytes 29..30 - Auto Center
: Bytes 29..30 - Auto Center
: Byte 31 - Hopping RF Chanel Delta (0xC0 gives sequence 0x33, 0x13, 0x42, 0x22)
: Byte 31 - Hopping RF Chanel Delta (0xC0 gives sequence 0x33, 0x13, 0x42, 0x22)
+
+The Joystick data from the wheel is returned to the micro. These are seen on the SPI bus as reads from the input buffer (register 0x61).
+
+<code>
+ [0x61(0x40)0x00(0x00)0x00(0x04)0x00(0x00)0x00(0x00)0x00(0x77)0x00(0xFF)0x00(0xFF)]
+</code>
+
+The format is as follows:
+: Byte 0 - Flag showing data in receive buffer
+: Byte 1
+: Byte 2
+: Byte 3
+: Byte 4
+: Byte 5
+: Byte 6
+: Byte 7
==Testing/Hacking==
==Testing/Hacking==