Teledyne LeCroy Protocol Analyzers File-Based Decoding User Manual - Manual (Page 47)

File-based Decoding User Manual Chapter 11: Primitives
LeCroy Corporation
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NextNBits()
NextNBits (integer>)
Parameter Meaning
Default
Value Comments
bit_count integer
Support
Supported by all LeCroy analyzers.
Return value
None.
Comments
Reads bit_count bits from the data source specified in the last call to GetNBits,
starting after the last bit that the previous call to GetNBits or NextNBits returned. If
called without a previous call to GetNBits, the result is undefined. Note that bits are
indexed starting at bit 0.
Example
raw = 'F0F0';# 1111000011110000 binary
result1 = GetNBits ( raw, 2, 4 );
result2 = NextNBits(5);
result3 = NextNBits(2);
This results in:
result1 == C
result2 == 7
result3 == 2
A call to GetNBits, starting at bit 2, reads 4 bits (1100), and returns the value 0xC.
A first call to NextNBits, starting at bit 6, reads 5 bits (00111), and returns the value 0x7.
A second call to NextNBits, starting at bit 11 (= 6 + 5), reads 2 bits (10), and returns the
value 0x2.