Objective Development Forums

Hi,

When connecting the Easylogger, in Windows a dialog tells that the device has malfunctioned and in Linux produces the log entries attached below.

The fuses seem OK and the recording indicator works fine.

I'm using the schematic provided in the pdf with a t45, but am using LEDs in place of Zeners.

Is there something obvious that I've missed?

Thanks,
Conail

Log output:
...
Nov 15 20:58:58 redsky kernel: [ 2225.116000] usb 2-1: new full speed USB device using ohci_hcd and address 45
Nov 15 20:58:59 redsky kernel: [ 2225.296000] usb 2-1: device descriptor read/64, error -62
Nov 15 20:58:59 redsky kernel: [ 2225.580000] usb 2-1: device descriptor read/64, error -62
Nov 15 20:58:59 redsky kernel: [ 2225.860000] usb 2-1: new full speed USB device using ohci_hcd and address 46
Nov 15 20:59:00 redsky kernel: [ 2226.268000] usb 2-1: device not accepting address 46, error -62
Nov 15 20:59:00 redsky kernel: [ 2226.444000 ] usb 2-1: new full speed USB device using ohci_hcd and address 47
Nov 15 20:59:00 redsky kernel: [ 2226.852000] usb 2-1: device not accepting address 47, error -62
...

D-/D+ weren't clamped to a high enough voltage.

Nov 15 20:58:58 redsky kernel: [ 2225.116000] usb 2-1: new full speed USB device using ohci_hcd and address 45

I think you connected the 2.2k resistor for High/Low Speed USB to the wrong line . It must be connected to D-.