Dear Eric, Thanks for all the information! I will read all the articles and videos. Now I have a small problem. I followed the video to map an image of Angstrom on my SD card, and boot the BBB with this system. However, when I try to connect the BBB to my mac through USB, the ip of the BBB won't be assigned automatically (it shows "self assigned IP", 169.254.51.158). Also I cannot ssh to it from Terminal. So I cannot get the control of the BBB from my computer. Do you know how to solve it?
Thanks! Henry 在 2015年6月12日星期五 UTC-4下午10:46:34，Eric写道： > > As a quick hack, the hard button(s) may be easier with less code, but you > are right, using the soft button approach with software based menus is much > more flexible. With the touchscreen attached, the beagle starts running > it's display on the touchscreen and enables the touch interface as if it > were a mouse. what you will likely want to do is when the system starts > have it start your button menu interface. that program will be the main > thing the user sees and by pushing certain buttons in the menu you create > each button causes a software action or conversely a software routine can > bring up a window or button. > > take a look at the following to get you started: > > https://en.wikipedia.org/wiki/PyQt > https://wiki.python.org/moin/PyQt > https://en.wikipedia.org/wiki/PySide > https://en.wikipedia.org/wiki/PyGTK > https://en.wikipedia.org/wiki/WxPython > https://en.wikipedia.org/wiki/Tkinter > > https://www.youtube.com/watch?v=53oeJPKRttY > https://www.youtube.com/watch?v=fqK8N48kPXs > https://www.youtube.com/watch?v=0vvb7Kv59qA > https://www.youtube.com/watch?v=8D_aEYiBU2c > > within python you ought to be able to use the python serial library and > one of the above libraries/toolkits to get your buttons working. i.e. push > software button, execute routine that spews string over serial, return to > menu. > > Eric > > On Fri, Jun 12, 2015 at 2:33 PM, Henry Yongfan Men <[email protected] > <javascript:>> wrote: > >> Dear Eric, thanks for the reply! I’m planning to use soft button, not the >> hard button. Because in the end, I will end up adding many soft buttons >> with different names that can send different strings to the next device >> through serial port. >> >> Now I have very rookie questions: >> 1) I have connect the BBB to the computer, and I have opened the webpage >> of http://192.168.7.2, and can perform the scripts on the webpage text >> box; I have also opened Cloud9 IDE (http://192.168.7.2:3000/) and >> performed some programs. But I noticed that the Cloud9 access some path >> that the USB disk cannot find. My question is, how to get to the beagle# >> status >> before entering any command to modify the configuration of the serial port? >> From the terminal of the computer? Or Cloud9? Or webpage test box? >> 2) It seems that when I connect the BBB to the back of the touch screen >> and turn it on, the board enters a system with touch control. So I suppose >> that I should run some GUI (some soft buttons) program from that system, >> instead of from computer via a USB cable. How to do that? >> >> Now I’m reading the book “Bad to the Bone: Crafting Electronic Systems >> with BeagleBone and BeagleBone Black”. It’s a very good book, but the >> progress seems to be too slow. I hope I could finish this by this weekend. >> But based on my background, there seems to be some barrier I should conquer >> first. So I really need some expert like you to instruct a little bit. Look >> forward to your reply. Thanks again. >> >> Henry >> >> 在 2015年6月12日星期五 UTC-4下午3:43:14，Eric写道： >>> >>> did you want to use soft buttons (buttons generated on the touchscreen >>> as needed in software) or hard buttons (buttons on the display that consist >>> of an actual hardware switch that causes a detectable contact closure) for >>> this? For the soft buttons I'd look at Qt. For the hard buttons, look at >>> how the beagle can edge detect an input and generate an interrupt based >>> upon that. I'd be happy to look a bit further once you have an idea which >>> direction you want to go. >>> >>> Eric >>> >>> On Fri, Jun 12, 2015 at 12:32 PM, Henry Yongfan Men <[email protected]> >>> wrote: >>> >>>> >>>> Dear all, >>>> >>>> I'm a complete newbie in this community. As a postdoc, I'm responsible >>>> of building a off-computer control system. I decided to use BeagleBone as >>>> the central controller. But since I have other academic jobs, I wish I >>>> could finish the project quick and dirty. So maybe I need some specific >>>> guidance on it. >>>> >>>> Now for the first version of the system, my idea is just have two >>>> buttons appearing the touch screen and when I press either of the buttons, >>>> the BBB will send out a string through the serial port. I have another >>>> device waiting for the string command to trigger some control, so the rest >>>> is already ready. >>>> >>>> I think this is rather easy, isn't it? But I spent about a whole day >>>> today trying to figure out how to send the string out, and still cannot be >>>> successful. Not to mention the touchscreen part. I have experience in >>>> Matlab and LabVIEW programming, a little C experience, no Javascript or >>>> Python, and now I have a BBB, a 7-inch touch screen, a USB cable, and a 5V >>>> 3A power supply. I can make the serial port with connectors to the board >>>> with no difficulty. I have tried to boot the board with the 5 power supply >>>> and the LCD screen hooked up, and I could see the operating system. So >>>> could anyone tell me how to step into this field with a relatively quicker >>>> method? Thanks! >>>> >>>> Sincerely, >>>> Henry >>>> >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "BeagleBoard" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
