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  • 慢速互联网连接Vmware fussion可能是未来的工作站硬件gpu虚拟化信息

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  • 怎么在同一引脚上连接TX和RX

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  • 16F628A拉低RA3会导致RA4低电平几秒钟?

    大家好。这是我的第一篇文章,因为我一直在寻找答案,因为其他人也有类似的问题,但这次我被难住了。我希望使用RA3和RA4来监视一个机构上的2个霍尔传感器(位置和机构的扩展位置)。但是,我已经断开了传感器,用按钮取代了传感器。RA3和RA4都有自己的拉高到5V,每一个都有一个常开的按钮来接地(更换传感器)。如果没有代码运行,如果我用电压表监视RA3或RA4端口,我就可以从5V到0V转换干净。RA3当RA3按钮被按下,当RA4按钮被按下时,RA4就干净了。现在奇怪的比特…如果我监视RA4和按下RA3(SiC)按钮,那么RA4电压保持在5V(如预期的那样)……如果监视器RA4和按钮RA3(SiC),如果代码是循环的,寻找RA3过渡。然后RA4下降到0V,然后需要大约4秒上升到5V。这就导致了进一步的代码预触发。我已经做了一些测试,这似乎只有当代码实际监测RA3时才发生。如果代码在别处,那么这不会发生。我没有在家中访问的范围,但这种倾斜可以清楚地看到一个体面的数字电压表。有人知道为什么会发生这种情况吗?RA3和RA4都被配置为输入。07H被写入CCMON寄存器以关闭比较器。VRCON被关闭(尝试打开和关闭)。中断没有设置。我已经尝试了所有4种可能组合的选项RG位4和5。想不出别的什么可以尝试了吗?非常感谢您的帮助。谢谢,凯文。 以上来自于百度翻译 以下为原文 Hello to all. This is my first post as I have always found answers as others have had similar issue, but this time I'm stumped. Hoping someone can help. I am using RA3 and RA4 to monitor 2 hall sensors on a mechanism (Home position and extended positions of the mechanism). However I have disconnected the sensors and replaced with buttons to exclude the sensors as a problem. Both RA3 and RA4 have their own pull up to 5v. Each then has a normally open push button to ground (replacing the sensors). Without the code running, if I monitor the RA3 or RA4 ports with a voltmeter I get clean transitions from 5v to 0v. With the code running I still always get clean transitions on RA3 when RA3 button is pressed, and clean on RA4 when RA4 button is pressed. Now the weird bit... If I monitor RA4 and press RA3 (sic) button then RA4 voltage remains at 5v (as would be expected) however... If monitor RA4 and press button RA3 (sic) and if the code is looping looking for RA3 transition then RA4 dips close to 0v and then takes about 4 seconds to rise back to 5v. This is then causing further code to pre trigger. I have done a few tests and this only seems to happen when the code as actually monitoring RA3. If the code is elsewhere then this does not happen. I do not have access to a scope at home, but this dip can be clearly seen on a decent digital voltmeter. Anybody got any idea why this may be happening? RA3 and RA4 are both configured as inputs.07h is written to the CMCON register to turn off the comparators.VRCON is turned OFF (Tried on and off).Interrupts not set up.I have tried all 4 possible combinations for Option Reg bits 4 and 5. Can't think of anything else to try? Any help will be very much appreciated.Thanks, Kevin

    2018-10-15 16:02

  • 电源关闭几秒后,Ram数据不会初始化

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    2019-07-10 14:03

  • 控制寄存器API出现问题

    我这样做UIT8温度;Time=控件ReaveRead();“CuffReg”是TopDesign.cysch中命名和初始化的控制寄存器在中断服务程序中。它给出错误错误:L127未解决的外部符号符号:CuffReGueRead模块:C:\\用户反物质\文档\ PSoC创建者\Deas02\Deas02. Cysn\DP8051-KeILIGUIN \Debug \Main .Obj.(main)请告诉我解决这个问题的办法。 以上来自于百度翻译 以下为原文I am doing this uint8 temp; temp= ControlReg_Read(); Where 'ControlReg' is a control register i named and initialized in TopDesign.cysch In an Interrupt service routine . Its givingthe error Error: L127 UNRESOLVED EXTERNAL SYMBOL SYMBOL:ControlReg_Read MODULE:C:\Users\Antimatter\Documents\PSoC Creator\Design02\Design02.cydsn\DP8051-Keil_Generic\Debug\main.OBJ (MAIN) Someone please tell me the solution to this.

    2019-01-14 12:50

  • UART缺少字节

    嗨,所有的人,都到了你盯着无数次,却看不到的地步。那就是我。我是一位经验丰富的设计师,多年来偶尔会有UART字节丢失的问题。这一次,我错过了,没有看到一个原因。我有一个PIC32 MX470接收数据包在UART,解析它们,然后回复UART。在很长一段时间,有时长达一个小时的周期性消息,一个字节在RX端丢失。下面是详细说明:FrReStuuUT中断是最高优先级字节被写入循环缓冲器,只有ISR写入此缓冲器(但丢失的字节不在缓冲器的边缘附近)。r)指向接收到的字节的位置的指针仅由ISR115200波特(每字节86个字节,如果我的数学正确)写的PIC时钟速率80 MHz(足够的时间来处理ISR并把接收到的字节填充到缓冲器中)“470 UART没有FIFO,但我不认为我是OV。错误的。(我应该检查一下,但我怀疑。)有没有想过我可能错过什么?谢谢你对我可能尝试的任何建议。戴夫 以上来自于百度翻译 以下为原文 Hi All, Ever get to the point where you've stared at something a zillion times but just don't see it?That's me.I am an experienced designer and have had problems with dropping UART bytes occasionally over the years.This time I'm missing it and don't see a reason. I have a PIC32MX470 which receives packets over UART, parses them, then replies over UART.Over a long period of time, sometimes up to an hour of periodic messages, a byte gets lost on the RX side. Here are details: FreeRTOSUART interrupt is highest priorityBytes get written into a circular buffer and only the ISR writes this buffer (but the lost byte is nowhere near the edges of the buffer)The pointer to the location where the received byte is saved is only written by the ISR115200 BAUD (86 usec per byte, if my math is right)PIC clock rate 80 MHz (plenty of time to handle the ISR and stuff the received byte into the buffer) The '470 UART doesn't have a FIFO, but I don't think I'm overrunning.(I should check this, but I doubt it.) Any thoughts as to what I might be missing? Thanks for any suggestions on what I might try. Dave

    2019-02-22 09:49

  • 具有交叉阴影接地平面的微带迹线阻抗如何设置

    所有,我有一个由聚酰亚胺制成的柔性电路(er = 3.3到3.5),我想用ADS2011布局确认单端微带线和差分偶数/奇数模式走线的阻抗。我已将Gerber文件加载到工具中,我可以设置多个端口。我的目标是在存在交叉阴影平面(非实心)的情况下提取单端/差分阻抗。柔性电路在动态环境中使用,并且它不能是实心平面参考,因为它会使其疲劳,并最终随着时间的推移而失效(裂纹迹线等)。我想调整走线和交叉影线参数以达到90欧姆差分阻抗和50欧姆单端。我将在两种情况下分解问题 - 差分和单端。我想为差分设置一个案例,并为偶数和奇数模式提取迹线的阻抗。我相信这在ADS中是小菜一碟,我只是不知道如何设置它。我知道我可以转换阻抗Z11 = 50 *(1 + S(1,1))/(1-S(1,1))。从这里我如何得到奇数和偶数模式?如何对交叉影线进行参数化,以便我可以改变一些参数并查看阻抗变化?我真的很感激任何帮助。我挖了我的旧书,我重新找到偶数= Z11 / 2 odd = 2 * Z11的阻抗。但是,我只需要知道我需要在跟踪上放置多少个端口。对于差分情况,我想这是一个双端口测量,但是地面参考怎么样?我会把以下端口P1,P2分别对一端进行差分对。 P3,P4到另一端,地面怎么样?它只是P5吗?然后我将其导出到原理图,并添加地面,因为我无法在布局中添加地面?任何帮助将不胜感激。这是我通过实验和FCC测试得到的经典案例,但我没有模拟模型来预测这一点而不需要迭代flex。谢谢rjrodrig 以上来自于谷歌翻译 以下为原文All, I have a Flex circuit made out of Polyimide (er =3.3 to 3.5), I want to confirm the impedance of single ended microstrip and differential even/odd mode traces using ADS2011 Layout.I have loaded the Gerber files into the tool, and I can setup multiple ports.My goal is to extract the single ended/diff impedance in the presence of a cross-hatched plane (not solid).The flex circuit is used in a dynamic environment, and it cannot be a solid plane reference as it will fatigue it, and eventually fail over time (cracked traces etc).I want to adjust the traces, and cross-hatch parameters to hit 90 ohms differential impedance, and 50 ohms single ended. I will split the problem in two cases -- the differential and single ended.I want to setup a case for the differential, and extract the impedance of the traces for even and odd mode.I am sure this is a piece of cake in ADS, I just don't know how to set it up.I know I can convert the impedance Z11 = 50*(1+S(1,1))/(1-S(1,1)).From here how do I get odd and even mode?How do I parametrize the cross hatch so I can vary the some parameters and look at the impedance changes? I would really appreciate it any help.I have dug up my old books and I recapped the impedance for even=Z11/2 odd=2*Z11.However, I just need to know how many ports I need to put on my traces. For the differential case, I imagine this is a two port measurement, but what about the ground reference?I would put the following ports P1,P2 to diff pair one end. P3,P4 to the other end, what about ground? Is it just P5?Do I then export this to schematic, and add ground since I can't add ground in Layout? Any help would be greatly appreciated.This is a classical case I have gotten around experimentally and through FCC testing, but I don't have a simulation model to predict this without iterating the flex. Thanks rjrodrig

    2019-01-08 15:24