Freescale Semiconductor M68HC08 series, Руководство по проектированию

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LIN Stepper Software Description
Designer Reference Manual DRM047 — Rev 0
66 LIN Stepper Software Description MOTOROLA
The following equation shows the relationship between system (raw
value range) and real (physical or normalized range) representation
(EQ 1.)
(EQ 2.)
(EQ 3.)
(EQ 4.)
where:
UWord16 Value is the unsigned 16-bit system representation of the real
value,
SWord16 Value is the signed 16-bit system representation of the real
value,
UWord8 Value is the unsigned 8-bit system representation of the real
value,
SWord8 Value is the signed 8-bit system representation of the real
value,
Real Value is the real value of the quantity [V, A, RPM, etc.],
Real Quantity Range Max is the maximum of the quantity range,
defined in the application [V, A, RPM, etc.],
MAX_U16 = 65535 is the maximum of the unsigned 16-bit variable,
MAX_S16 = 32768 is the maximum of the signed 16-bit variable,
MAX_U8 = 255 is the maximum of the unsigned 8-bit variable,
MAX_S8 = 127 is the maximum of the signed 8-bit variable.
UWord16 Value MAX_U16 1 +
( )
Real Value
Real Quantity Range Max
--------------------------------------------------------------
=
SWord16 Value MAX_S16 1 +
( )
Real Value
Real Quantity Range Max
--------------------------------------------------------------
⋅
=
UByte Value MAX_U8 1 +
( )
Real Value
Real Quantity Range Max
--------------------------------------------------------------
⋅
=
SByte Value MAX_S8 1 +
( )
Real Value
Real Quantity Range Max
--------------------------------------------------------------
⋅
=
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Freescale Semiconductor, Inc.
For More Information On This Product,
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