參數(shù)資料
型號: RX30000
英文描述: RX4000 Installation | User's Manual[10/2001]
中文描述: RX4000安裝|用戶手冊[10/2001]
文件頁數(shù): 68/111頁
文件大小: 391K
代理商: RX30000
CHAPTER 8 DESCRIBING A CF DEFINITION FILE
User's Manual U13687EJ1V2UM
68
8.4 SPECIFICATION FORMAT FOR SIT INFORMATION
The following shows the specification format that must be observed when describing SIT information in a CF
definition file.
In the following explanation, boldface text indicates a reserved word, while italics indicate a value, symbol name,
or keyword to be supplied by the user.
Where multiple values may be selected and specified, the following conventions are used.
[X]
Value X can be omitted.
The value followed by the three dots may be specified repeatedly.
8.4.1 System Information
The system information defines the basic clock cycle, operating frequency, default stack size, and interrupt
handler stack size.
For a CF definition file, the specification of the system information is required.
Figure 8-2 shows the specification format for the system information.
Figure 8-2. System Information Specification Format
clktim
clk_base
,
clk_freq
;
defstk
dflt_siz
;
intstk
istk_siz
;
The items constituting the system information are as follows.
clk_base
Specifies the basic clock cycle (ms).
A value of between 0x1 and 0x7fffffff can be specified for clk_base.
Remark
The basic clock cycle is that cycle at which RX4000 generates the clock interrupts
necessary to realize the time management function (cycle rise, delay rise, time-
out).
clk_freq
Specifies the operating frequency of the processor (MHz).
A value of between 1 and 1,000 can be specified for clk_freq.
dflt_siz
Specifies the default stack size (bytes).
A value of between 0x0 and 0x7fffffff can be specified for dflt_siz
Remark
The default stack size is the smallest task stack size that can exist within the
system. If, therefore, at system activation, a static task is generated or if an active
task is generated as a result of a cre_tsk system call, and a stack size smaller than
the default is specified, that specification is ignored and the default size is used.
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