huhuolianmeng 发表于 2020-7-22 23:48:50

怎么在FREERTOS下设置一个软件延时,不利用滴答定时器,不利用软件和硬件定时器,用纯软件指令延时,达到1Us的延时???

环境:
主频400MHZ

芯片H743ZIT6

第一种方法是:利用
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
硬件仿真计算具体时间,除了这个办法还有更好的办法吗??求硬汉解决!!!!


eric2013 发表于 2020-7-23 02:29:06

DWT实现一个精确微秒延迟的参考例程
http://www.armbbs.cn/forum.php?mod=viewthread&tid=89128&fromuid=58
(出处: 硬汉嵌入式论坛)

la9998372 发表于 2020-7-23 08:32:08

软件延时肯定不如硬件定时器延时好用,如果不是systick的话,还是dwt吧,一样好用

huhuolianmeng 发表于 2020-7-23 09:14:42

eric2013 发表于 2020-7-23 02:29
DWT实现一个精确微秒延迟的参考例程
http://www.armbbs.cn/forum.php?mod=viewthread&tid=89128&fromuid=5 ...

非常感谢,学习学习
页: [1]
查看完整版本: 怎么在FREERTOS下设置一个软件延时,不利用滴答定时器,不利用软件和硬件定时器,用纯软件指令延时,达到1Us的延时???