Since you mentioned that you use a handmade usb cable... This could be the problem. Reason is that the mini USB-OTG cable actually has 5 pins:
https://www.pinterest.com/pin/511580838893581192/ If you splice a straight USB cable to connect to a usb device, the pi will assume it's the slave, not the master. If you insist on using our DIY cable, try adding this to /boot/config.txt: [pi0] dtoverlay=dwc2,dr_mode=host On Monday, June 6, 2022 6:31:29 PM PDT you wrote: > Thanks, Huan! > Unfortunately, dmesg showed nothing, and xev showed one event on the first > touch, and nothing after. > I do see (I think) the device coming up in dmesg during bootup, but nothing > unusual. > > [ 22.986800] input: TSTP MTouch as > /devices/platform/soc/20980000.usb/usb1/1-1/1-1:1.0/0003:0416:C168.0 > 001/input/input1 > [ 23.023450] hid-multitouch 0003:0416:C168.0001: input,hidraw0: USB HID > v1.11 Device [TSTP MTouch] on usb-20980000.usb-1/input0 > > Great idea, though. I'd meant to check that, but forgot until you reminded > me. Thanks! > > Best, > Ron > > On Mon, Jun 6, 2022 at 9:17 PM Huan Truong <[email protected]> wrote: > > You could try watching the dmesg for any disconnection of usb > > > > $ sudo dmesg -w > > > > Then touch the screen and see if there's anything weird. > > > > You could also watch for x events. > > > > $ xev > > > > > > > > > > Huan Truong > > tnhh.net > > > > On Jun 6, 2022, at 5:38 PM, Ron Craig via TriEmbed <[email protected]> > > wrote: > > > > > > Hi, gang. > > > > I bought this display > > <https://www.amazon.com/dp/B07L6WT77H?psc=1&ref=ppx_yo2ov_dt_b_product_det > > ails> from Amazon. It states it works with the Pi Zero, but I cannot get > > Touch to work on that. Touch works fine on a Pi 4B, but not the Zero. > > Any hints? > > > > I have made my own cables where needed, but Touchscreen still does not > > work. I am including my wiring setup below. Am I missing something? The > > arrow on the OS screen moves the *first *time I touch the screen, but > > will not move after that. I think it is a software issue? Are there > > drivers needed for the Zero? > > > > > > > > > > > > > > > > > > > > > > > > *pi@hamclock:~ $ cat /etc/os-releasePRETTY_NAME="Raspbian GNU/Linux 10 > > (buster)"NAME="Raspbian GNU/Linux"VERSION_ID="10"VERSION="10 > > (buster)"VERSION_CODENAME=busterID=raspbianID_LIKE=debianHOME_URL="http:// > > www.raspbian.org/ > > <http://www.raspbian.org/>"SUPPORT_URL="http://www.raspbian.org/RaspbianF > > orums > > <http://www.raspbian.org/RaspbianForums>"BUG_REPORT_URL="http://www.raspb > > ian.org/RaspbianBugs <http://www.raspbian.org/RaspbianBugs>"* > > > > *pi@hamclock:~ $ uname -aLinux hamclock 5.10.103+ #1529 Tue Mar 8 12:19:18 > > GMT 2022 armv6l GNU/Linux* > > > > > > In the picture: > > 1: Power Block (5V 3.5A) to MICRO USB power connector on the Zero W. No > > under voltage warnings. All looks good. > > 2: DIY 4-wire cable from JST to MICRO USB connector on the Zero W. > > Substitute for the 5V+Touch connector on the side. > > 3: Supplied FPC to MINI HDMI connector on the Zero. Reaches fine once I > > moved the Zero to another location (was too short if the Zero was > > installed > > where suggested). > > > > [image: Zero Connections small.png] > > I've put Kapton tape on the back of the Zero W to prevent any electrical > > shorts with the unused mounting post. > > > > On bootup to 32-bit Raspberry OS, the desktop appears properly and the > > picture looks great. I can touch the screen EXACTLY ONE TIME, and the > > arrow cursor will move to where I touched the screen. It never moves > > after > > that. > > > > The application I use does not require a keyboard if I can use a > > touchscreen. Without touch, I need a bluetooth mouse, which I would rather > > not use. There are less expensive non-touch screens I think I could use if > > touch will not work. > > > > Any help is greatly appreciated. I've already printed a nice case and > > swinging mounting arm for this display, so I would love to keep it and use > > it if I can get touch to work. > > > > Note that I've also tried power through the 5V IN connector, but the > > behavior is exactly the same. > > > > Generally, are there any gotchas with Touch and the Zero or Raspberry OS > > in general I could try? > > > > Best, > > -- > > Ron Craig KO4RON > > J'ai bonne espérance! > > > > _______________________________________________ > > Triangle, NC Embedded Interest Group mailing list > > > > To post message: [email protected] > > List info: http://mail.triembed.org/mailman/listinfo/triembed_triembed.org > > TriEmbed web site: https://TriEmbed.org > > To unsubscribe, click link and send a blank message: mailto: > > [email protected]?subject=unsubscribe > > Searchable email archive available at > > https://www.mail-archive.com/[email protected]/ _______________________________________________ Triangle, NC Embedded Interest Group mailing list To post message: [email protected] List info: http://mail.triembed.org/mailman/listinfo/triembed_triembed.org TriEmbed web site: https://TriEmbed.org To unsubscribe, click link and send a blank message: mailto:[email protected]?subject=unsubscribe Searchable email archive available at https://www.mail-archive.com/[email protected]/
