KE02系列 PIT定时器当前值如何读取

[ghq926]

KE02系列 PIT定时器当前值如何读取？

[ivadorazinova]

Hello,

Current Timer Value Register (PIT_CVAL0)

please refer to Reference Manual for KE02 http://cache.nxp.com/files/32bit/doc/ref_manual/MKE02Z64M20SF0RM.pdf?fpsp=1&WT_TYPE=Reference%20Manu...

I hope this helps you.

Best Regards,

Iva

[ghq926]

这个我看了，你们的例程中找不到对Pit当前值的定义，所以我无法操作，我又不知道怎么修改

高厚清 2016 07 14

在 2016-07-13 18:11:45，"ivadorazinova" <admin@community.freescale.com> 写道：

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KE02系列 PIT定时器当前值如何读取

reply from Iva Dorazinova in Kinetis Microcontrollers - View the full discussion

Hello,

please refer to Reference Manual for KE02 http://cache.nxp.com/files/32bit/doc/ref_manual/MKE02Z64M20SF0RM.pdf?fpsp=1&WT_TYPE=Reference%20Manu...

I hope this helps you.

Best Regards,

Iva

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[ivadorazinova]

Hello,

it should be counter = PIT_CVAL0; for reading counter of channel 0

you cannot change the value of the counter.

You can change only load value LDVAL - either while the cycle is running (it will be set after finishing current period) or if you don´t want to finish it, you have to disable channel counter, set LDVAL and enable it again.

-----------

你好，

它應該是反= PIT_CVAL0;通道0的計數器讀數

你不能改變計數器的值。

您只能更改負載值LDVAL - 週期運行的是同時（將完成本期後才能進行設置），或者如果你不想將完成它，你必須禁用通道計數器，設置LDVAL並再次啟用它。

----------- translated by Google

I hope this helps.

Best Regards,

Iva

[ghq926]

官方提供的库文件没有定义PIT_CVALn，我是菜鸟，自己在原来的定义中加了一下，编译通过了，但读出来的数据始终为0。

这是我pit.h中修改的一条

这是主函数中读取定时器当前值的部分，请教问题出在哪？有没有更新的库文件？我主要目的是测量交流点的周期，（最终目的是交流同步采样）。有更好的方法吗？

在 2016-07-19 21:40:11，"ivadorazinova" <admin@community.freescale.com> 写道：

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NXP Community

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KE02系列 PIT定时器当前值如何读取

reply from Iva Dorazinova in Kinetis Microcontrollers - View the full discussion

Hello,

it should be counter = PIT_CVAL0; for reading counter of channel 0

you cannot change the value of the counter.

You can change only load valueLDVAL - either while the cycle is running (it will be set after finishing current period) or if you don´t want to finish it, you have to disable channel counter, set LDVAL and enable it again.