This bit is set by hardware and cleared by software writing “1”.

swallow1029 · 发表于 2012-3-7 20:32:02

This bit is set by hardware and cleared by software writing “1”.
这句话该怎么理解？感觉很是别扭。这位是由硬件置位，并由软件写 1 清除。这样理解对吗？如果是这样的话，那么硬件值 1 复位了，软件还怎么值1 呢？

xiaodc88 · 发表于 2012-3-7 20:37:27

就是这么理解的，很多单片机都是这么操作的

swallow1029 · 发表于 2012-3-7 20:41:17

我的意思是说既然由硬件来值 1 了，那么软件还怎么值 1 呢？
比如：
Bit 1 IWDGF: Independent Watchdog reset flag
This bit is set by hardware and cleared by software writing “1”.
0: No IWDG reset occurred
1: An IWDG reset occurred

安 · 发表于 2012-3-8 10:17:56

软件写1是清除。

swallow1029 · 发表于 2012-3-8 12:00:44

那如果是硬件值 1 呢？也是清楚吗？

This bit is set by hardware and cleared by software writing “1”.

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