參數(shù)資料
型號(hào): EB-230
廠商: Electronic Theatre Controls, Inc.
英文描述: Power Schottky Rectifier with common cathode
中文描述: 功率肖特基整流共陰極
文件頁數(shù): 8/16頁
文件大小: 401K
代理商: EB-230
3.1.2 MTK NMEA Packet Format
Maximum packet length is restricted to 255 bytes.
Field
Length
Preamble
1 byte
TalkerID
4 byte
EB-230 Data Sheet
Ver 1.2
8
Type
Character
Character string
Description
“$”
“PMTK”
From “000” to “999”, an identifier used
to tell the decoder how to decode the
packet
A “
,”
must be inserted before each data
filed to help decoder process the
DataField
The star symbol is used to mark the end
of DataField
Checksum of the data between
preamble “
,”
and “*”
Used to identify the end of a packet
PktType
3 byte
Character string
DataField
Variable
*
1 byte
Character
CHK1,
CHK2
CR, LF
2 byte
Character string
2 byte
Binary data
Sample Packet: $PMTK000*32<CR><LF>
3.1.3 MTK NMEA Packet Protocol
In order to inform the sender whether the receiver has received the packet, an
acknowledge packet PMTK_ACK should return after the receiver receives a packet.
3.1.4 MTK NMEA Packet List
Pkt
Type
Abbreviation /
Syntax
Data
Field
Meaning /
Example /
Return
000
PMTK_TEST
PMTK_ACK
PMTK001,Cmd,Flag
None
Test Packet
$PMTK000*32<CR><LF>
Acknowledge of PMTK command
$PMTK001,604,3*32<CR><LF>
001
Cmd: Command / packet
type the acknowledge
responds
Flag:
0 = Invalid command /
packet
1 = Unsupported command
/ packet type
2 = Valid command /
packet, but action failed
3 = Valid command /
packet, and action
succeeded
Msg: System message.
0 : Unknown
1: Startup
010
PMTK_SYS_MSG
PMTK001,Msg
Output system message
$PMTK010,001*2E<CR><LF>
Preamble
TalkerID
PktType
DataField
*
CHK1
CHK2
CR
LF
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