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| 型号： | GP2000 |
| 厂商： | Mitel Networks Corporation |
| 英文描述： | () |
| 中文描述： | （） |
| 文件页数： | 5/25页 |
| 文件大小： | 256K |
| 代理商： | GP2000 |
13
GP2000 – GPS CHIPSET DESIGNER’S GUIDE
Software Porting Issues
It is likely that all GPS receiver software will contain some
host or implementation dependent features. GPS Architect soft-
ware is no exception. However, to facilitate the porting of GPS
Architect code to different processors, such features are kept to
a minimum by maximising the use of a high-level programming
language (ANSI ‘C’) and grouping unavoidable dependencies
in single modules.
As a consequence of this, and the desire to maintain a high
level of generality, scope exists for improvement to the general
efficiency and reduction in processor loading of the software.
This can be achieved by optimising the software for a particular
system (processor, memory structure, etc.), although at the ex-
pense of further portability.
Fig. 13 Concurrent structure of GPS Architect software
Task
TAlloc
Check for
User
Commands
& Update
Satellite
Allocation
to Channels
Suspend
1 Second
Task
TProcSbf
Update
Ephemeris
& Almanac
Extrapolation
Data &
Process
Received
Satellite Data
Suspend
1 Second
Task
TRTCM
Process
Received
RTCM
SC-104
DGPS
Corrections
Suspend
03 Second
Task
TDisplay
Transmit
Monitor
Serial
Comms
Data
Suspend
1 Second
Task
TNav
Update
Position
Fix
Suspend
n301 Sec.
Task
TTakeMeas
Collect
Measurement
Data,
Update
Search
Cells
Suspend
01 Second
Do Main
Program
Loop
Benchmark
Task
MAIN
Save
CPU Context
GP2021
Interrupt
900
s
Restore Context
(may switch
tasks)
Write to &
Read from
DUARTS
Update
Tracking
Loops
Return
Initialise
Hardware &
Software &
Enable
Multi-Tasking
main()
Program
entry point
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相关代理商/技术参数 |
参数描述 |
|---|---|
| GP20-005R | 制造商:FRONTIER 制造商全称:Frontier Electronics. 功能描述:2A GENERAL PURPOSE PLASTIC RECTIFIER |
| GP2000-D11-L25-0.3 | 制造商:t-Global Technology 功能描述:THERMAL PAD TUBE 11X25X0.3MM |
| GP2000-D11-L30-0.3 | 制造商:t-Global Technology 功能描述:THERMAL PAD TUBE 11X30X0.3MM |
| GP2000-D13.5-L25-0.3 | 制造商:t-Global Technology 功能描述:THERMAL PAD TUBE 13.5X25X0.3MM |
| GP2000-D13.5-L30-0.3 | 功能描述:THERMAL PAD TUBE 13.5X30X0.3MM 制造商:t-global technology 系列:GP2000 零件状态:有效 使用:- 形状:圆形 外形:30.00mm x 13.50mm 厚度:0.012"（0.305mm） 材料:硅树脂橡胶 粘合剂:- 底布，载体:- 颜色:绿 热阻率:- 导热率:1.3 W/m-K 标准包装:1 |
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