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] > <javascript:>> 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] <javascript:>. >> 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.
