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dsp28335 EPWM模块的CMPR立即加载模式

请问:我应该如何等效的将dsp28335的CMPA CMPB影子模式改为立即加载模式,才能让电机运行波形不出现毛刺啊?

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FRANK1:

感谢您对TI产品的关注!关于你的咨询,我们正在确认您的问题,感谢您的耐心等待。

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基于设备TRM,第302页:www.ti.com/…/sprui07.pdf 您应该将值“1”写入CMPCTL寄存器中的位字段SHDWAMODE和SHDWBMODE。这将激活即时模式。(立即模式。仅使用活动比较寄存器。所有写入和读取都直接访问活动寄存器以进行立即比较操作)

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guorui yuan:

我的确是这样做的,将各路EPWM的SHDWAMODE均设置为1,其他都没有变化(另外在影子模式下的波形都很完美,但是由于算法的需要必须将装载模式改为立即加载模式),但是上机呈现的波形会有很多毛刺,是否还需要增加对于CMPA CMPB装载时刻的判断代码,从而让其可以等效影子模式下的运行波形?

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你好,

您可以使用Action Qualifier Software Force,以便在ISR中调用操作时设置操作。您可以查看TRM中的AQSFRC注册。希望对您有所帮助。

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Hebrew
Polish

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Portuguese

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Romanian

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Hungarian
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Indonesian
Slovak

Czech
Italian
Slovenian

Danish
Japanese
Spanish

Dutch
Klingon
Swedish

English
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Thai

Estonian
Latvian
Turkish

Finnish
Lithuanian
Ukrainian

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Urdu

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