Difference between revisions of "Data types"
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|[[VBITMAP]][1..n]||Variable length bitmap with n bits. (n is a multiple of 8.) | |[[VBITMAP]][1..n]||Variable length bitmap with n bits. (n is a multiple of 8.) | ||
− | Structure:< | + | Structure:<br\>[[UINT1 ]] - containing the number of bytes in the following bitmap. <br\>bitmap - always fills whole bytes. <br\>- Unused bits in last byte is set to 0. <br\>- First bit is the most significant (leftmost) bit in first byte. |
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|[[TEXT16]]||16 characters (bytes) of text. Padded with spaces. <br\>ASCII values > 32 (0x20) only. | |[[TEXT16]]||16 characters (bytes) of text. Padded with spaces. <br\>ASCII values > 32 (0x20) only. |
Revision as of 10:59, 22 June 2007
The following table identifies the data types used in the application data of the AlphaNet Data Protocol:
Data Type | Definition |
---|---|
UINT1 | 8 bits (one byte) |
SINT1 | 1-byte signed integer |
UINT2 | 2byte unsigned integer. MSB first |
UINT4 | 4byte unsigned integer. MSB first |
BITMAP[1..n] | nbits bitmap (multiple of 8). Always fills whole bytes. <br\>- Unused bits in last byte is set to 0. <br\>- First bit is the most significant (leftmost) bit in first byte.<br\>- Bits are numbered from 1, a byte contains bits 1..8. |
VBITMAP[1..n] | Variable length bitmap with n bits. (n is a multiple of 8.)
Structure:<br\>UINT1 - containing the number of bytes in the following bitmap. <br\>bitmap - always fills whole bytes. <br\>- Unused bits in last byte is set to 0. <br\>- First bit is the most significant (leftmost) bit in first byte. |
TEXT16 | 16 characters (bytes) of text. Padded with spaces. <br\>ASCII values > 32 (0x20) only. |
CLOCK | Date & time structure:<br\>UINT2 Year (yyyy)<br\>UINT1 Month (mm)<br\>UINT1 Day (dd)<br\>UINT1 Hour (hh)<br\>UINT1 Minutes (mm)<br\>UINT1 Seconds (ss) |
NET_OBJ_REF | AlphaCom Intercom Object Reference. <br\>Can both encode directory numbers and physical numbers.<br\>See next pages for details. |