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add datasheet pdf link

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Drashna Jael're 2023-11-20 19:50:47 -08:00
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commit b54db09186
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drivers/sensors/spacemouse_module.c
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@ -5,31 +5,7 @@
#include "pointing_device_internal.h" #include "pointing_device_internal.h"
#include "uart.h" #include "uart.h"
// REQUEST_DATA (the important part) // datasheet available at https://3dconnexion.com/cn/wp-content/uploads/2020/02/HW-Spec-3DX-700039_Rev001_serial.pdf
// Function: requests position data from the 3D-Sensor Command: 172 (0xAC)
// Returns: 16 bytes data
// Structure: B1 B2 ... B16
// Byte 1: start-byte 0x96 (150 decimal); every data set starts with this byte Byte 2: high byte of X value
// Byte 3: low byte of X value
// Byte 4: high byte of Y value
// Byte 5: low byte of Y value
// Byte 6: high byte of Z value
// Byte 7: low byte of Z value
// Byte 8: high byte of A value (X rotation) Byte 9: low byte of A value (X rotation) Byte 10: high byte of B value (Y rotation) Byte 11: low byte of B value (Y rotation) Byte 12: high byte of C value (Z rotation) Byte 13: low byte of C value (Z rotation) Byte 14: high byte of Checksum
// Byte 15: low byte of Checksum
// Byte 16: end-byte 0x8D; every response ends with this byte
//
// X, Y, Z, A, B, C values and the Checksum are transmitted as unsigned 14-Bit values. This is due to the fact, that the MSB of payload data is always cleared (logic 0).
// Calculating a value:
// high byte (X) low byte (X)
// 14-bit value (unsigned)
// Xvalue = (high byte (X) * 128 + low byte (X)) - 8192
// Transmitted Checksum:
// Checksumtrans = (high byte (Checksumtrans) * 128 + low byte (Checksumtrans))
// Calculating the Checksum:
// Checksumcalc = (Byte1 + Byte2 + ... + Byte13) & 0x3FFF.
// By masking the Checksum with 0x3FFF (logic AND operation), the value is reduced to a 14-Bit value.
// The value range for X, Y, Z, A, B, C values is -350 up to +350.
#define SPACEMOUSE_INPUT_OFFSET (8192) #define SPACEMOUSE_INPUT_OFFSET (8192)