MSP430 PROFILE功能

最新推荐文章于 2024-09-27 09:27:46 发布

dfshftuerue

最新推荐文章于 2024-09-27 09:27:46 发布

阅读量421

点赞数

分类专栏： MSP430

本文链接：https://blog.youkuaiyun.com/u010901716/article/details/34453383

版权

MSP430 专栏收录该内容

3 篇文章

订阅专栏

本文介绍了如何利用MSP430的PROFILE功能进行时钟计数，以测量代码段之间的周期数。通过使能时钟计数、设置计数方式、复位计数器，然后在断点间运行代码，可以获取CPU周期数。最后，将周期数乘以1/CLK转换为秒，以便计算时间消耗。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1 使能时钟计数功能

在菜单栏 Run->Clock->Enable.

2 设置时钟计数方式

在菜单栏 Run->Clock->Setup. 有两种工作方式手动和自动

Clock setup.png

3 复位时钟计数为0

双加黄色时钟即可

4 计数方法

To measure cycles between two lines of code using profile clock:

Set breakpoints at the lines between which you want to measure cycle count
Run to the first breakpoint
Double click on the clock to reset its value
Run to the second breakpoint
The clock will display the cycle count between those two points in the code

5 转换为所得值

The profile clock displays the direct CPU cycle count, therefore its value must be multiplied by ¹/_CLK to convert it to seconds.

For example, if the target is running at 300MHz and the Profile clock cycle count for a routine is 1000, then the time consumed by the routine would be:

1000 * ( ¹/ _300,000,000) = 3.3 μs