如何处理C中的时间？ [英] How to deal with time in C ?
问题描述
输入信号。我的问题是，我想为某些范围的
用户输入产生输出。所以为此，我想每隔40ms调用一次我的程序。
之前，我从来没有按时完成任务。
我的软件运行linux操作系统一个HIL模拟器。
- 处理器是小端
- 从闪存启动
- Excalibur的输入时钟频率为20MHz
- SDRAM时钟频率为133MHz。
使用C库可以从任何处理器中获取时间吗？
任何人都可以建议如何处理我的问题？
谢谢，
srikanth。
使用C库可以从任何处理器中获取时间吗？
任何人都可以建议如何处理我的问题??
它可能与C语言本身无关。也许
您可以查看POSIX标准。从这里开始：
http://www.unix.org/ single_unix_specification /
时间功能描述如下：
http ：//www.opengroup.org/onlinepubs /...ions/time.html
您可以使用函数alarm（）或setitimer（），getitimer（）等。
它们在linux中可用。
问候，
Shailendra
" srikanth" < SR ******************* @ gmail.com>在消息中写道
news：11 ********************* @ g49g2000cwa.googlegro ups.com ...我写了一个C-program，它输出特定
输入的信号。我的问题是，我想为某些范围的用户输入生成输出。所以为此，我想每隔40ms调用一次我的程序。
之前，我从来没有按时完成任务。
我的软件在HIL模拟器上运行linux操作系统。
- 处理器是小端
- 从闪存引导
- Excalibur的输入时钟频率为20MHz
- SDRAM时钟频率为133MHz。
使用C-library是它可以从任何处理器获得时间吗？
任何人都可以建议如何处理我的问题吗？
谢谢，
srikanth。
" srikanth" < SR ******************* @ gmail.com>在消息中写道
news：11 ********************* @ g49g2000cwa.googlegro ups.com ...我写了一个C-program，它输出特定
输入的信号。我的问题是，我想为某些范围的用户输入生成输出。所以为此，我想每隔40ms调用一次我的程序。
之前，我从来没有按时完成任务。
我的软件在HIL模拟器上运行linux操作系统。
- 处理器是小端
- 从闪存引导
- Excalibur的输入时钟频率为20MHz
- SDRAM时钟频率为133MHz。
使用C-library是它可以从任何处理器获得时间吗？
任何人都可以建议如何处理我的问题吗？
谢谢，
srikanth。
考虑使用crontab？
i have written one C -programm, which outputs signals for specific
input. what my question is, i want to produce outputs for some range of
user inputs. so for this i want to call my programm for every 40ms.
Before, i never dealed with time.
my software is running with linux operation system on a HIL simulator.
- Processor is little endian
- Boot from flash
- Input clock frequency for Excalibur is 20MHz
- SDRAM clock frequency is 133MHz.
Using C-libraries is it possible to get time from any processor??
Could any one please suggest how to proceed for my problem??
Thank you,
srikanth.
Using C-libraries is it possible to get time from any processor??
Could any one please suggest how to proceed for my problem??
It''s probably not related to the C laguage itself. Maybe
you can have a look at the POSIX standard. Start here:
http://www.unix.org/single_unix_specification/
The "time" function is described here:
http://www.opengroup.org/onlinepubs/...ions/time.html
Hi,
You can use functions alarm() or setitimer(),getitimer() etc.
They are available in linux.
Regards,
Shailendra
"srikanth" <sr*******************@gmail.com> wrote in message
news:11*********************@g49g2000cwa.googlegro ups.com...i have written one C -programm, which outputs signals for specific
input. what my question is, i want to produce outputs for some range of
user inputs. so for this i want to call my programm for every 40ms.
Before, i never dealed with time.
my software is running with linux operation system on a HIL simulator.
- Processor is little endian
- Boot from flash
- Input clock frequency for Excalibur is 20MHz
- SDRAM clock frequency is 133MHz.
Using C-libraries is it possible to get time from any processor??
Could any one please suggest how to proceed for my problem??
Thank you,
srikanth.
"srikanth" <sr*******************@gmail.com> wrote in message
news:11*********************@g49g2000cwa.googlegro ups.com...i have written one C -programm, which outputs signals for specific
input. what my question is, i want to produce outputs for some range of
user inputs. so for this i want to call my programm for every 40ms.
Before, i never dealed with time.
my software is running with linux operation system on a HIL simulator.
- Processor is little endian
- Boot from flash
- Input clock frequency for Excalibur is 20MHz
- SDRAM clock frequency is 133MHz.
Using C-libraries is it possible to get time from any processor??
Could any one please suggest how to proceed for my problem??
Thank you,
srikanth.
Thought about using crontab?
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