Teledyne LeCroy LeCroy Analyzers File Based Decoding Manual - Manual (Page 48)

Chapter 11: Primitives File-based Decoding User Manual
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LeCroy Corporation
NextNBits()
NextNBits (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);
Trace ( "result1 = ", result1, " result2 = ", result2, " result3
= ", result3 );
This generates this trace output:
result1 = C result2 = 7 result3 = 2
In the call to GetNBits: starting at bit 2, reads 4 bits (1100), and returns the value 0xC.
In the first call to NextNBits: starting at bit 6, reads 5 bits (00111), and returns the value
0x7.
In the second call to NextNBits: starting at bit 11 (= 6 + 5), reads 2 bits (10), and returns
the value 0x2.
Parameter Meaning
Default
Value Comments
bit_count integer