Search found 162 matches

by Grendel
Mon Sep 14, 2009 8:53 pm
Forum: V-USB
Topic: Beginner's Post
Replies: 2
Views: 2174

Re: Beginner's Post

It's defined in asmcommon.inc: ;---------------------------------------------------------------------------- ; Processing of received packet (numbers in brackets are cycles after center of SE0) ;---------------------------------------------------------------------------- ;This is the only non-error ...
by Grendel
Mon Sep 14, 2009 2:51 am
Forum: V-USB
Topic: [Solved] HID doesn't work if reportbuffer exceeds 8 bytes
Replies: 2
Views: 2147

Re: HID doesn't work if reportbuffer exceeds 8 bytes

Welp, from usbdrv.h: USB_PUBLIC void usbSetInterrupt(uchar *data, uchar len); /* This function sets the message which will be sent during the next interrupt * IN transfer. The message is copied to an internal buffer and must not exceed * a length of 8 bytes. The message may be 0 bytes long just to i...
by Grendel
Wed Sep 09, 2009 11:32 pm
Forum: V-USB
Topic: How to use Native Language in Device Name?
Replies: 1
Views: 1723

Re: How to use Native Language in Device Name?

See USB 2.0 specs, chap. 9.6.7 String Descriptors. The Laguage Identifiers document is located here
by Grendel
Fri Sep 04, 2009 6:59 am
Forum: V-USB
Topic: v-usb and CodeVision
Replies: 9
Views: 6691

Re: v-usb and CodeVision

You are welcome For development check out the Teensy boards. Be aware that his code examples don't implement a full USB state machine in the interrupt, they are good for learning tho. As an alternative take a look at the Atmel USBkey board. Atmel has example source code for the USB chips online, you...
by Grendel
Tue Sep 01, 2009 1:49 am
Forum: V-USB
Topic: v-usb and CodeVision
Replies: 9
Views: 6691

Re: v-usb and CodeVision

Well, w/o knowing the details of what you need I really don't know (you may get away w/ a AT90USB82, as low as $1.80 @ 100 quantity). Just making sure you're aware of native USB AVRs The main problems w/ V-USB are 1. USB 1.1 (slow) and 2. it needs a guaranteed low ISR latency. Depending on your devi...
by Grendel
Mon Aug 31, 2009 8:31 pm
Forum: V-USB
Topic: v-usb and CodeVision
Replies: 9
Views: 6691

Re: v-usb and CodeVision

For pro-development I'd suggest to check out the Atmel chips that come w/ a USB module like the Atmega16U4.
by Grendel
Mon Aug 31, 2009 6:31 am
Forum: V-USB
Topic: v-usb and CodeVision
Replies: 9
Views: 6691

Re: v-usb and CodeVision

Why ? WinAVR and AVR Studio are free, professional high performance tools.
by Grendel
Thu Aug 27, 2009 10:12 am
Forum: V-USB
Topic: How to know if device has been connected to the USB ?
Replies: 10
Views: 5563

Re: How to know if device has been connected to the USB ?

On a 2nd thought -- the SOFs also go away if the device is suspended, that could be a problem. Am afraid that the only really safe way to detect a disconnect is monitoring the VBus signal.
by Grendel
Thu Aug 27, 2009 8:21 am
Forum: V-USB
Topic: How to know if device has been connected to the USB ?
Replies: 10
Views: 5563

Re: How to know if device has been connected to the USB ?

Hm, that's probably because V-USB doesn't detect the disconnect. Forgot about that In order for this to work you could enable the SOF counter (see USB_COUT_SOF in usbconfig-prototype.h) and monitor the SOFs. If they stop comming you are disconnected and could manually reset the driver with this func...
by Grendel
Mon Aug 24, 2009 8:20 am
Forum: V-USB
Topic: How to know if device has been connected to the USB ?
Replies: 10
Views: 5563

Re: How to know if device has been connected to the USB ?

Christian, could you flag this for inclusion w/ the next release please ?
by Grendel
Thu Aug 20, 2009 1:39 am
Forum: V-USB
Topic: How to know if device has been connected to the USB ?
Replies: 10
Views: 5563

Re: How to know if device has been connected to the USB ?

I tested the variable usbConfiguration in the main loop. It doesnt change at all. If i disconnect or re-connect the device , it remains the same. Is there something i did wrong ? No, the driver has a bug (oversight actually), usbConfiguration doesn't get cleared if a reset happens on the bus: Chris...
by Grendel
Thu Aug 13, 2009 10:01 pm
Forum: V-USB
Topic: Lost connection with PC: any way to restore?
Replies: 14
Views: 6757

Re: Lost connection with PC: any way to restore?

You can reconnect automatically if you connect the D- pull up resistor to an I/O pin instead of Vcc. See the USB_CFG_PULLUP_* macros in usbconfig.h . To reconnect, issue usbDeviceDisconnect(), wait 1-2s, then issue a usbDeviceConnect().
by Grendel
Thu Aug 13, 2009 9:54 pm
Forum: V-USB
Topic: How to know if device has been connected to the USB ?
Replies: 10
Views: 5563

Re: How to know if device has been connected to the USB ?

Usually the last thing the host does during enumeration is setting the configuration. You can check if the variable usbConfiguration is not zero for an indication if the device is plugged in and enumerated. Christian, usbConfiguration should be cleared during a reset condition (usbPoll(), where usbD...
by Grendel
Thu Aug 13, 2009 2:13 am
Forum: V-USB
Topic: Knowing when a transfer is complete.
Replies: 5
Views: 3156

Re: Knowing when a transfer is complete.

Try this (see usbPoll()):

Code: Select all

    extern volatile uchar usbTxLen ;

    tx_complete = (usbTxLen & 0x10) ;
by Grendel
Tue Aug 11, 2009 7:24 am
Forum: V-USB
Topic: usb interrupt ( answered )
Replies: 3
Views: 2419

Re: usb interrupt

Use

Code: Select all

USB_INTR_ENABLE &= ~_BV( USB_INTR_ENABLE_BIT ) ;

to disable the interrupt and

Code: Select all

USB_INTR_ENABLE |= _BV( USB_INTR_ENABLE_BIT ) ;

to re-enable it.