PIC24 PWM误导了手册中的差异

谢谢你们的回应，我肯定错了，我希望我是错的。请你指出这两种模式，如果你知道的话，在每一种文件中描述哪种模式？我也一样。存在或不能够设置1%的占空比，但只有2-100%的循环不是一个大问题，该设备正在工作，PWM是PWM ing，事情可以被称为“完成”。但问题仍然没有答案，这使我感到不舒服。因此，问题仍然存在。如果我们看“PIC24家庭手册第16条输出比较”的图16-21（WW1. Microchip .com／下载/ En/DeVicoDC/3706A.PDF），很明显地观察到一个简单的规则：0下降EDG后的上升沿。在OCxR之后。通过这种方式，我可以设置PWM占空比从0到OCXRS，从而获得每一个之间的职责。但是如果我遵循图3-14的“DSPIC33／PIC24家庭参考手册，部分输出与专用计时器比较”（WW1. Microchip .com／下载/ En/DeViceOC/7000 05159A .pdf），则此规则被打破。上升沿是在0之前，而下降仍然是在OCXR之后。真正地？现在我该如何设定PWM到0的任务？如果我设定OCXR＝0会发生什么？PWM定时是0还是1？好的，大概是0吧。因此，我得到了一系列实际的PWM任务可用：0, 2, 3，4，…OCxR，但不是1。这1点是我非常关注的问题。



      以下为原文

    Thanks guys for your response
 
@antipo Surely I could be wrong and I hope I am. Would you please point out those two modes and which one is described in each of these documents, if you know?
 
@Nikolay_Po ***ривет нашим Yep, just the same with me. Being or not being able to set 1% of duty, but only 2-100% cycle is not a big problem, the device is working, pwm is pwm-ing and things could be referred to as "done". But the question is still unanswered and this makes me feel uncomfortable.
 
So the question remains.
 
If we look at Figure 16-21 of "pic24 family manual section 16 output compare" (ww1.microchip.com/downloads/en/DeviceDoc/39706a.pdf), a simple rule is obviously observed: rising edge after 0 falling edge after OCxR. This way i can set pwm duty from 0 to OCxRS and thus obtain each every duty in between.
 
But if i follow Figure 3-14 of "dsPIC33/PIC24 Family Reference Manual, section Output Compare with Dedicated Timer" (ww1.microchip.com/downloads/en/DeviceDoc/70005159a.pdf), then this rule is broken. The rising edge is here BEFORE 0, and the falling is still AFTER the OCxR. Really? Now how am I supposed to set pwm to 0 duty? If I set OCxR=0 what will happen? Will it be 0 or 1 duty for pwm timing? Ok, probably that will become 0, i guess. So I get the following series of actual pwm duties available: 0, 2, 3, 4, .... OCxR, but no 1. This 1 is my very small concern.
 

我所强调的一段文字不是一种不同的模式——它是一种不同的外设。检查你的芯片中的两个外设中的哪一个，并使用适当的文档。这就是为什么时序图和其他位不同的原因。



      以下为原文

   
 
The piece of text I have highlighted is not a different mode - it is a different peripheral. Check which of the two peripherals your chip has and use the appropriate document. That is why the timing diagram and other bits are different.

如上所述。请再读一遍Antipo…事实上说。



      以下为原文

    As above. Please read again what Antipo... actually said.

我发现确保你拥有最适合你的设备的FRM部分的最新版本的最好方法是去Microchip网站上的设备页面。你不仅会发现数据表链接作为右上角附近的一个大红色按钮，如果你向下滚动到底部附近的“文档”项目，并扩展它，你就会看到数据表链接、勘误表链接和一系列FRM链接。对实际设备的正确FRM部分的苏珊。



      以下为原文

    The best way I've found to make sure that you have the latest version of the correct FRM section that is appropriate for your device is to go to the devices page on the Microchip web site. Not only will you find the data sheet link as a big red button near the top right-hand corner, if you scroll down to the 'Documentation' item near the bottom and expand that, you will see the data sheet link, the errata link and a whole series of FRM links.
Those last links will be to the latest version of the correct FRM section for the actual device.
Susan