I have an App that needs to detect, if a USB Storage device is getting mounted. Can i simulate the mounting of an USB Storage Device while the Emulator is already running? This way i can debug the behavior of my app.
As i know, for registering the mounting and unmounting of the USB Storage Device i can use the StorageVolumeCallback(). What do i have to do to write a simple .txt File to that attached USB Storage Device?
Im having trubble to create a StorageManager inside my ViewModel because i do not have access to the Context.
Im thankful for any Tipp related to USB Storage Management at all.
Info:
API Version: 31
IDE: Android Studio
Language: Kotlin
Edit:
So i do not necessarily need to have a external usb drive mounted at startup. If its possible with adb it would be great if i could just forward a usb Pendrive to the running emulator when i need it. Something like adb connectUsbDevice -deviceid=****,vendorid=***
There isn't a .NET library I'm aware of which can do this. However, please refer to this post where the brilliant answer shows how to do this interfacing with the Win 32 API.
How do I disable a system device programmatically?
You'll need a combination of this, and a WMI query to find an attached PnP device of type storage. As a clue:
using (var searcher = new ManagementObjectSearcher(#"SELECT * FROM Win32_USBHub"))
{
collection = searcher.Get();
}
Change Win32_USBHub to the correct class if this isn't giving you what you're looking for.
EDIT: Be warned. If you're disabling storage devices, make sure they're not in use. That's what the "Safely remove USB" option is for in Windows.
Another option, if you don't need to emulate this in code, use a real USB storage device inserted in the system and use PowerShell to get, disable, and enable the device.
The Cmdlets you'll need are:
Get-PnpDevice
Disable-PnpDevice
Enable-PnpDevice
Related
H,
I am trying to flash a new firmware image to my MXChip as per this quick-start guide
https://learn.microsoft.com/en-us/azure/iot-develop/quickstart-devkit-mxchip-az3166
I can build the .bin file, and when I connect the Devkit over USB I see a new usb flash drive called "(D:) AZ3166", but I cannot access this drive to copy the binary file to it. I get the error message "D:\ is not accessible. Access is denied.".
I found this page here
https://www.linkedin.com/pulse/mxchip-devkit-iot-central-firmware-flashing-errors-ben-vollmer/
But it didn't help because nothing happens when I press A+B. I also tried all 8 methods described here:
https://www.anyrecover.com/storage-device-tips/usb-access-denied/
But it didn't solve the problem.
Anyone has already had this? I ordered a batch of 5 MXChip boards, and it is the same on all of them.
So, my knowladge in embedded development is quite bad and now I am trying to receive some data from PC inside my MCu STM32F429IGT6 which is on WaveShare Core4X9I dev-board and send it back via USB Virtual COM Port.
I realized how to set up connection from MCu part and I even see connected device from Windows 10 Device Manager but... it appears as STM Device in DFU Mode
I have tryed already to install drivers from ST for such things but they are useless and official documentation says that they are not needed for Windows 10.
I have been following tutorials where guys just clicked several times inside Cube MX, generated code and VCP worked out of the box.
The question is what am I doing wrong? I don`t even know what information you might ask for thats why I created GitHub repo: https://github.com/dessy4oko/stm32f429-vcp-appears-as-dfu
And this is events from Device Manager of Windows 10 (translation from ru lang):
Device USB\VID_0483&PID_DF11\305233703237 is running. code 410
Device USB\VID_0483&PID_DF11\305233703237 is configured. code 400
Device USB\VID_0483&PID_DF11\305233703237 have not been moved due to partial or ambiguous matching. code 442
Device USB\VID_0483&PID_DF11\305233703237 requires further installation. code 430
Thank you for any information about my mistakes.
STM32 starts in DFU mode if BOOT-pins are pulled accordingly:
"System memory" means embedded bootloader, DFU in this case. You need "Main Flash" to run your app.
Check jumpers and switches on your board. Refer also to the AN2606 app note for complete information.
I'm trying to write a mac app to access USB. The USB can be written through app only and not in other means. I want to make sure,app is having exclusive write access to it. I tried to find some apis in disarbitration but all efforts are gone in vain.
Adding Further details ::
I'm not trying to make all USB ports as read-only. When I plugin USB drive to the system, it should ask for password. If authentication fails, then user can view the files but can't write to it.
I'm studying and developing a module to stream and control a CSI-2 camera, but I don't have device(It's being shipped).
I added device tree, code for config, read/write on I2C bus, defined some v4l2 operator functions,..
Could you tell me how to to test a module without device? Thanks in advance!
Does anyone know if it is possible to access the iPad's camera connection kit? I would like to read the files off the connected mass storage device. Would this be possible or is this something that only Apple can do in their apps.
Thanks
I know this is an old question, but google brought me here so I thought I'd add this link for the next person to come along.
The good news is this. USB drives do mount properly and show up in the system as /dev/disk2s1. Yay. You can even add more drives via a hub. The iPad supports both FAT and HFS+ drives.
The bad news is this. As iPhone developer Dustin Howett discovered,
that mount point is sandboxed away from normal developer use. You
cannot read from or write to that disk using standard iPhone SDK
applications.