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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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NSAM266SAA/V 数据表(PDF) 35 Page - National Semiconductor (TI) |
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NSAM266SAA/V 数据表(HTML) 35 Page - National Semiconductor (TI) |
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35 / 52 page  20 Software (Continued) GL Get Length Returns the length of the current message in multiples of 32 bytes The returned value includes the message directory informa- tion (64 bytes for the first block and 32 bytes for every other block) message data and the entire last block of the mes- sage even if the message occupies only a portion of the last block Since a flash block includes 4096 bytes the re- turned length may be bigger than the actual message length by up to 4095 bytes The minimum length of a message is one block ie an empty message occupies 4 kbytes (the message length is 409632 e 128) Example GL Byte sequence Microcontroller 19 AA AA CompactSPEECH 19 02 00 Description Get the length of the current message The CompactSPEECH responds 512 ie the message occupies 16384 (512 32) bytes GMS Get Memory Status type Returns the estimated total remaining recording time in sec- onds as a 16-bit unsigned integer This estimate assumes 52 kbits with no silence compression a real recording may be longer according to the amount of silence detected and compressed The return value is dependent on the value of the type pa- rameter as follows 0 The remaining recording time is returned 1 Returns 0 (For compatibility only) 2 Same as 0 (For compatibility only) The return value is unpredictable for any other value of type Example GMS 0 Byte sequence Microcontroller 12 00 AA AA CompactSPEECH 12 00 01 40 Description Return the remaining recording time The CompactSPEECH responds 320 seconds GMT Get Message Tag Returns the 16-bit tag associated with the current message If the current message is undefined ERR VALID is report- ed Example GMT Byte sequence Microcontroller 04 AA AA CompactSPEECH 04 00 0E Description Get the current message tag In a system where the message tag is encoded as described in the DMS command the CompactSPEECH return value indicates that the message is a new ICM in mailbox Number 6 GNM Get Number of Messages tag ref tag mask Returns the number of messages whose message tags match the tag ref parameter Only bits set in tag mask are compared ie a match is considered successful if message tag and tag mask e tag ref and tag mask where and is a bitwise AND operation The tag ref and tag mask parameters are each two bytes the return value is also 2-bytes long For example if tag ref e 4216 and tag mask e 3F16 the number of existing old messages whose user-defined tag is 2 is returned See Section 261 for a description of message-tag encoding If tag mask e 0 the total number of all existing messages is returned regardless of the tag ref value Example GNM FFFE 0003 Byte sequence Microcontroller 11 FF FE 00 03 AA AA CompactSPEECH 11 FF FE 00 03 00 05 Description Get the number of messages which have bit 0 cleared and bit 1 set in their message tags CompactSPEECH responds that there are five messages which satisfy the request http www nationalcom 35 |
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