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felis / USB_Host_Shield_2.0

Revision 2.0 of USB Host Library for Arduino.
https://chome.nerpa.tech
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DATALOGIC scanner does not initialize #464

Open WRelihan opened 5 years ago

WRelihan commented 5 years ago

Hi I am trying to use a DATALOGIC Quickscan Lite QW2420 barcode/QR scanner to work with the USB host shield. I am using a ESP32 for the micro. The setup works fine with a USB keyboard. The scanner works fine with a PC. I can set it up to work as either a keyboard or a comport. The problem is that the scanner does not initialize. I have put a scope on the D+ and D- signals and I see that the 1ms data frames is present. The comms seems to be around 5Mhz for a single bit. The waveform does seem somewhat distorted. I dont know if this could be a problem. DSC_0432 I have also checked with a thumbdrive, which operates at the same speed and the waveforms looks a lot better: DSC_0433

Is it possible that the max 3421 is sensitive to this type of distortion? I got the scanner to work a few times with USB_desc. And therereafter with USBHID_desc it actually made the beep sounds when the scanner is initialized. I could then proceed to start scanning. But I was just starting to do some code for parsing the input when it all stopped. I could not get anywhere with it again.

I changed USB_desc to print the USB_state as it powers up. I get the following: 0x12 - Detached waiting for device 0x20 -Attached - substate settle 0x40 - Attached - substate wait reset complete 0x51 - Attached - substate wait reset and then 0xA0 - USB state error

I have traced this error to USB::Configuring in Usb.cpp. There is a printf that was commented out which I re-enabled and changed to print the rcode ( around line731): ///////////// if(rcode) { printf("Configuring error: Can't get USB_DEVICE_DESCRIPTOR: 0x%02X \r\n",rcode);

            return rcode;
    }

////////////

This prints the message: Configuring error: Can't get USB_DEVICE_DESCRIPTOR: 0x0D

I am at a loss what to do next. I think that the 5m cable that comes with the scanner is maybe to long for the data rate, and that is why the wave-forms are distorted, but it does work with my PC.

I am prepared to buy another brand of barcode/qrscanner if someone can recommend one to me that works.

PS: THANKS for this great library. I am struggling to understand it as I am new to object orientated programming and classes etc. But by digging into this library I have already learned a lot.

Regards

Willem

xxxajk commented 5 years ago

Are you using USB power only? If so, use a 9VDC adapter instead.

WRelihan commented 5 years ago

No. I am supplying 5vdc to the usb_host shield via a 12 to 5v dc/dc. I also monitored the 5v on the usb plug and it is steady at 5v. Thanks for your help.

On Sun, 02 Jun 2019, 12:31 Andrew Kroll, notifications@github.com wrote:

Are you using USB power only? If so, use a 9VDC adapter instead.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/felis/USB_Host_Shield_2.0/issues/464?email_source=notifications&email_token=AMHFI5KZIJKDR7PDPBQHYWTPYOOPDA5CNFSM4HSCKK3KYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODWXSTVI#issuecomment-498018773, or mute the thread https://github.com/notifications/unsubscribe-auth/AMHFI5N7UZXHK26TN72BZ2LPYOOPDANCNFSM4HSCKK3A .

foxalabs commented 5 years ago

What kind of output filtering have you got on that dc/dc noisemaker? (P.S, nice scope, old tektronics TDS?) As a thing to try, get a big 1000uF or larger cap and a 100nF and a 10pF as a makeshift ripple choke and see what that does to the waveforms, they currently look pretty nasty.

sylvioalves commented 4 years ago

@WRelihan, have you found a solution for this issue?