Hello, I have to pack a complicated message into a 16-bit word that is defined like so:

Part 1: Error State (Least Significant Byte)
Part 2: Mode/Status/Additional Status

Part 1 Error State is defined like so:
Bit 0: Error type A (Least Significant Bit)
Bit 1: Error type B
Bit 2: Error type C
Bit 3: Error type D
Bit 4: Error type E
Bit 5: Error type F
Bit 6: Error type G
Bit 7: Error type H (Most significant Bit)

Part 2: Mode/Status Additional Status is defined like so:
Mode: The mode is contained in the least significant 4 bits of the most significant byte. Mode numbers go 0 - 11.
Status:
Bit 12: Status Type A
Bit 13: Status Type B
Bit 14: Status Type C
Additional Status:
Bit 15: Reset on/off

I can't seem to get the pack() command right. I want to pack:
Error type E, Mode 7, Status Type B, Additional Status ON

my $msg = pack("n",
    pack("C", 0, 0, 0, 0, 1, 0, 0, 0), #error state
    pack("C", 7, 0, 1, 0, 1)
);

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Perl doc, http://perldoc.perl.org/functions/pack.html, does not say about little/big endian when it comes to packing chars.

In reply to Pack()-ing a Message by rem45acp

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