[问答]

怎么使用PIC16F1778的16位PWM，用于推挽输出

问答对人有帮助，内容完整，我也想知道答案 0 我尝试用PIC16F1778产生两个PWM信号来驱动全桥变压器威廉希尔官方网站。我现在开始使用MCC来设置外围设备，并使用MPLABX 3.50的模拟器和逻辑分析器。我可以在RA1上设置100kHz和50%占空比的10位PWM3，一切正常。MCC有一个问题，它不允许选择PORTC，这正是我所需要的，但是我可以编辑pin_manager.c文件以根据需要定位PWM到RC1。这就是我在这里所做的，但是模拟逻辑分析器显示一个具有更短占空比的波形。我添加了一个将PWM的状态输出到RC0的循环，它显示了正确的波形：[发布PNG图像的访问被拒绝]http://enginuity..c...s/MCCTEST16F1778-2。看起来问题可能是在PORTC上的模拟器逻辑分析仪。因此，我将尝试将它们引导到RA1和RA2，但是我什么也得不到。我有PWM5设置为标准PWM，时钟=FOSC，没有预缩放，PWM偏移模式独立运行，PWM重载的各种组合，周期100us，占空比50us，相位0，和偏移=1us。但是逻辑分析器没有显示RA2上的活动，RC2上也没有设置为PWM5CONbits.OUT的状态。我有一个物理设备，也许下一步是在硬件上试试。我不知道我是否正确设置，或者如果它是模拟器的问题。以上来自于百度翻译以下为原文 I am trying to use a PIC16F1778 to produce two PWM signals for driving a full bridge transformer circuit. I am now starting to use the MCC to setup the peripherals, and using the simulator and logic analyzer of MPLABX 3.50. I can set up the 10 bit PWM3 for 100 kHz and 50% duty cycle, on RA1, and everything works as expected. There is a problem with MCC such that it will not allow selection of PORTC, which is what I need, but I can edit the pin_manager.c file to locate the PWM to RC1 as I desire. That's what I did here, but the simulation logic analyzer shows a waveform with a much shorter duty cycle. I added a loop that outputs the state of the PWM to RC0, and it shows the proper waveform: [access denied for posting PNG image] http://enginuitysystems.c...s/MCCTEST16F1778-2.png I was getting similar unusual waveforms for the PWM5 and PWM6, also directed to PORTC. It looks like the problem may be with the simulator logic analyzer on PORTC. So, I'll tried directing them to RA1 and RA2, but I get nothing. I have PWM5 setup as standard PWM, Clock=FOSC, no prescale, PWM offset mode independent run, various combinations of PWM reload, period 100 us, duty cycle 50 us, phase 0, and offset=1 us. But the logic analyzer shows no activity on RA2, and nothing on RC2 which is set to the state of PWM5CONbits.OUT. I have a physical device, and perhaps the next step is to try it on the hardware. I don't know if I'm setting it up properly, or if it is a problem with the simulator. 0
2019-5-22 06:15:21　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × qun333 该类别下有 57 个回答。邀请回答技术发广告该类别下有 56 个回答。邀请回答 caoguiqun 该类别下有 56 个回答。邀请回答 psw30 该类别下有 44 个回答。邀请回答伊丹姿子该类别下有 41 个回答。邀请回答 uwufwjrw 该类别下有 39 个回答。邀请回答 hetao1111 该类别下有 38 个回答。邀请回答 lc123617 该类别下有 35 个回答。邀请回答欧阳大大该类别下有 32 个回答。邀请回答作死不止该类别下有 31 个回答。邀请回答 asd010 该类别下有 31 个回答。邀请回答 wy8719 该类别下有 29 个回答。邀请回答 60user92 该类别下有 29 个回答。邀请回答 ju978779 该类别下有 28 个回答。邀请回答嘻嘻爱哈哈该类别下有 28 个回答。邀请回答 haikitty 该类别下有 28 个回答。邀请回答 pol666 该类别下有 27 个回答。邀请回答 xiuzhen122 该类别下有 27 个回答。邀请回答 ueywyrsdfs 该类别下有 26 个回答。邀请回答 lhly23 该类别下有 25 个回答。邀请回答举报刘甜甜相关推荐 • 如何使用PIC16F1778构建项目 1164 • PIC16F1778作为一个数字LFO控制信号除了溢出之外会中断吗 1145 • PIC16F1778 ADC上的摆幅电压范围 1706 • PIC16F1778 PWM不能分配给PORTC，而PWM5似乎不适用于SIM逻辑分析仪 910 • 具有4个16位PWM的PIC16 1944 • 如何单独设置adccon0的go/done位？ 1888 • EUSART接收不支持PIC16F1778 1507 • PIC16F1773-1778的ADC GO位丢失包括H文件吗？ 2258 • 请问PIC18F2431是否不受MCC支持？ 2905 • pic16f628a中的pwm与端口无法正常工作该怎么办？ 1264 2个回答

答案对人有帮助，有参考价值 0 以上来自于百度翻译以下为原文

2019-5-22 06:32:29 评论举报夏涌革

答案对人有帮助，有参考价值 0 我决定采用一种不同的方法来获得我需要的推挽式PWM驱动器，使用PWM3和COG。经过一些尝试和错误之后，我发现我必须在100kHz下将PWM3设置为不超过95%的占空比，并且在两个输出上使用500ns的死区时间。成功！结果如下：以上来自于百度翻译以下为原文 I decided to take a different approach to getting the push-pull PWM drive that I need, using PWM3 and the COG. After a bit of trial and error I found that I had to set PWM3 to no more than 95% duty cycle at 100 kHz and I used 500 ns dead time on both outputs. Success! Here is the result:

2019-5-22 06:44:50 评论举报夏涌革