usb_set_configuration in open_ec3 returned -16 : Device or resource busy

[eduardoaugustojulio]

Hi!
I compiled whit success all project, and when i run

ec2test-any --port=USB --debug

i got the message bellow

---

• WARNING: Auto detection of mode may cause initialisation sequence *
• to differ significantly from the SiLabs IDE. *
• In the case of problems specify --mode=C2 or --mode=JTAG *

---

ec2_GetDbgInfo(0x10c4,0x8044) 1
./ec2readflash:/home/eduardo/Downloads/ec2/src/ec2drv/ec2drv.c:2162:
usb_set_configuration in open_ec3 returned -16 : Device or resource busy
Exiting now
Disconnect done

running dmesg
[ 142.775927] usb 2-1.8: new full-speed USB device number 6 using ehci-pci
[ 142.886010] usb 2-1.8: New USB device found, idVendor=10c4, idProduct=8044
[ 142.886014] usb 2-1.8: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 142.886016] usb 2-1.8: Product: USB Debug Adapter
[ 142.886019] usb 2-1.8: Manufacturer: Silicon Laboratories
[ 142.886021] usb 2-1.8: SerialNumber: EC3003B9CC9

[ 928.505306] usb 2-1.8: usbfs: interface 0 claimed by usbhid while 'ec2test-any ' sets config #1

[kaklik]

Hi,
I have exactly the same problem.

[povik]

Hi,

most likely the device is claimed by a kernel driver, which is what prevents you from talking to the device directly. I solved this by creating an udev rule:

SUBSYSTEM=="usb", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="8044", MODE="0660", GROUP="plugdev", RUN="/bin/sh -c 'echo -n $id:1.0 > /sys/bus/usb/drivers/cp210x/unbind'"

Where the kernel driver I wish to dissociate is cp210x. In your case, @eduardoaugustojulio, the claiming driver seems to be usbhid.

Alternatively, see ec2drv.c:2151. There's a function call to release the device, but its compilation depends on a macro.