Thanks for the reply. I don't think uhubctl supports my hub because it cannot detect the hub. And I'm just having a hard time using pyusb. dev.detach_kernel_driver(0) and dev.set_configuration() work fine. But after that, I don't know how to use ctrl_transfer to control the port power. I tried some values on https://wiki.osdev.org/Universal_Serial_Bus. And I tried combinations of
retType_list = [0x00, 0x01, 0x02, 0x03, 0x20, 0x21, 0x22, 0x23, 0x30, 0x31, 0x32, 0x33, 0x40, 0x41, 0x42, 0x43] bReq_list = [0x01, 0x03] wVal_list = [0x00, 0x01, 0x02] wIndex_list = [0, 1, 2, 0x20, 0x81, 0xa0] But the powers never went to 0000.0000. Best, Anthony On Mon, Nov 30, 2020 at 5:39 PM Karl Palsson <ka...@tweak.net.au> wrote: > > Well. For starters, does it _actually_ support port power control > (even ganged) or does it just say it does? > > Does it work using existing tools like uhubctrl [1] or similar, > and you're just having a hard time porting to pyusb or has this > never worked? > > Sincerely, > Karl Palsson > > [1] https://github.com/mvp/uhubctl > > > Anthony An <dstdas...@gmail.com> wrote: > > I'm trying to control the power of a camera that is connected > > to a ganged port power control hub. With dev = > > usb.core.find(idVendor=0x1a40, idProduct=0x0401) and > > bmRequestTypes = [0x00, 0x01, 0x02, 0x03, 0x20, 0x21, 0x22, > > 0x23, 0x40, 0x41, 0x42, 0x43], I tried to use ctrl_transfer, > > but none of them worked. Can someone help me to figure out how > > to control the power? What I want is turning off the power, not > > just disabling the port. > > > > > > > > > > Bus 001 Device 004: ID 1a40:0401 Terminus Technology Inc. > > Device Descriptor: > > bLength 18 > > bDescriptorType 1 > > bcdUSB 2.00 > > bDeviceClass 9 Hub > > bDeviceSubClass 0 Unused > > bDeviceProtocol 1 Single TT > > bMaxPacketSize0 64 > > idVendor 0x1a40 Terminus Technology Inc. > > idProduct 0x0401 > > bcdDevice 1.00 > > iManufacturer 0 > > iProduct 1 USB 2.0 Hub > > iSerial 0 > > bNumConfigurations 1 > > Configuration Descriptor: > > bLength 9 > > bDescriptorType 2 > > wTotalLength 25 > > bNumInterfaces 1 > > bConfigurationValue 1 > > iConfiguration 0 > > bmAttributes 0xe0 > > Self Powered > > Remote Wakeup > > MaxPower 100mA > > Interface Descriptor: > > bLength 9 > > bDescriptorType 4 > > bInterfaceNumber 0 > > bAlternateSetting 0 > > bNumEndpoints 1 > > bInterfaceClass 9 Hub > > bInterfaceSubClass 0 Unused > > bInterfaceProtocol 0 Full speed (or root) hub > > iInterface 0 > > Endpoint Descriptor: > > bLength 7 > > bDescriptorType 5 > > bEndpointAddress 0x81 EP 1 IN > > bmAttributes 3 > > Transfer Type Interrupt > > Synch Type None > > Usage Type Data > > wMaxPacketSize 0x0001 1x 1 bytes > > bInterval 12 > > Hub Descriptor: > > bLength 9 > > bDescriptorType 41 > > nNbrPorts 2 > > wHubCharacteristic 0x0004 > > Ganged power switching > > Compound device > > Ganged overcurrent protection > > TT think time 8 FS bits > > bPwrOn2PwrGood 50 * 2 milli seconds > > bHubContrCurrent 100 milli Ampere > > DeviceRemovable 0x06 > > PortPwrCtrlMask 0xff > > Hub Port Status: > > Port 1: 0000.0100 power > > Port 2: 0000.0100 power > > _______________________________________________ > > pyusb-users mailing list > > pyusb-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/pyusb-users > _______________________________________________ > pyusb-users mailing list > pyusb-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pyusb-users >
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