Search found 29 matches

by psc
Wed Apr 22, 2009 4:42 pm
Forum: V-USB
Topic: alternative to usbSetInterrupt with HID
Replies: 5
Views: 5276

Re: alternative to usbSetInterrupt with HID

Finally i've decided to use Custom class device. I am not sure about the following code, but i am sharing it (maybe someone will tell me that it's not good). I can send 12 bytes in 8 ms and the speed of main() { } is not affected when i don't care about sending important value, avoiding this: In ord...
by psc
Wed Apr 22, 2009 4:26 pm
Forum: V-USB
Topic: Vendor type requests sent to custom HID class template
Replies: 2
Views: 2793

Re: Vendor type requests sent to custom HID class template

Thank you Christian. Using a HID Descriptor with a custom class prevents the "New Device" dialog on Windows. However to access it as a custom class device, you need to install the driver. Here's how to do it with InnoSetup, taken from libusb-win32-device-bin-0.1.12.1/examples/driver_instal...
by psc
Mon Apr 20, 2009 11:43 pm
Forum: V-USB
Topic: Vendor type requests sent to custom HID class template
Replies: 2
Views: 2793

Vendor type requests sent to custom HID class template

hi everyone, after reading: m i came to the conclusion that my project would benefit from using the following USB Device Class: Vendor type requests sent to custom HID class device i am looking for a template / project that use this method! here's what i have discovered so far: usbconfig.h #define U...
by psc
Mon Apr 20, 2009 4:29 am
Forum: V-USB
Topic: alternative to usbSetInterrupt with HID
Replies: 5
Views: 5276

alternative to usbSetInterrupt with HID

Hi everyone, I hope someone will take the time to enlight me. I want to avoid installation of a driver, so i am using HID (joystick). I am running V-USB on an atmega164p @ 20 mhz. My reportBuffer is 12 bytes. This is how i send the report: while (!usbInterruptIsReady()) { wdt_reset(); usbPoll(); } u...
by psc
Sat Apr 11, 2009 2:02 am
Forum: V-USB
Topic: USB MIDI Interface
Replies: 93
Views: 305699

Re: USB MIDI Interface

hi martin, i am very happy to say that i am now using an atmega164p (new version of atmega16). it's cheaper and faster (20 mhz). i want to ask you a question about optimization for the usb communication. here's my function that send the noteon, noteoff: void usbsend(unsigned char note, unsigned char...
by psc
Sun Mar 22, 2009 6:49 pm
Forum: V-USB
Topic: 12 mhz vs 20 mhz
Replies: 2
Views: 3032

12 mhz vs 20 mhz

hi,

i searched the forum for an answer, but found nothing. my question is really basic:
if i use a 20 mhz clock instead of 12 mhz, does it means that the rest of the processing will be faster?

pat
by psc
Sun Feb 01, 2009 11:00 pm
Forum: V-USB
Topic: USB MIDI Interface
Replies: 93
Views: 305699

hi horo, thank you very much, i am working hard to learn avr, obdev usb firmware and the midi protocol. i have successfully added a midi out to your project using the code from this project: m how to specify the midi channel in your code: midiMsg[0] = 0x09; midiMsg[1] = 0x90; midiMsg[2] = 36; midiMs...
by psc
Sun Jan 18, 2009 9:28 pm
Forum: V-USB
Topic: USB MIDI Interface
Replies: 93
Views: 305699

hi horo,

a really simple question:
is it possible to add a MIDI OUT port (physical connection with an opto-isolater). i just need the MIDI OUT, but would it be possible to have MIDI IN too?

pat
by psc
Thu Jan 15, 2009 8:37 pm
Forum: V-USB
Topic: Continously sampling via ADC, how to start
Replies: 15
Views: 16163

Roger,

Really nice of you! It would be very helpful to have the entire code, including the pyUSB.

Cheers!
Pat
by psc
Thu Jan 15, 2009 7:04 am
Forum: V-USB
Topic: Continously sampling via ADC, how to start
Replies: 15
Views: 16163

roger,

would it be possible to have a look at your solution. i am trying to achieve something similar but so far no luck.

let us know,
cheers,
pat
by psc
Fri Dec 05, 2008 9:23 pm
Forum: V-USB
Topic: Free Running Mode possible?
Replies: 3
Views: 4600

it's true, i am new to avr so it might be my code //sbi(ADCSRA, ADIE); //Enable ADC conversion complete interrupt working ([ 2732.974342] usb 3-1: configuration #1 chosen from 1 choice) sbi(ADCSRA, ADIE); //Enable ADC conversion complete interrupt not working ([ 2720.042034] usb 3-1: device not acce...
by psc
Fri Dec 05, 2008 9:35 am
Forum: V-USB
Topic: Free Running Mode possible?
Replies: 3
Views: 4600

Free Running Mode possible?

hi all, from the datasheet (in my case atmega16): Using the ADC Interrupt Flag as a trigger source makes the ADC start a new conversion as soon as the ongoing conversion has finished. The ADC then operates in Free Running mode, constantly sampling and updating the ADC Data Register. The first conver...
by psc
Sun Nov 16, 2008 6:13 am
Forum: V-USB
Topic: zener 3.6 500mW / 12mhz crystal digikey confirmation
Replies: 2
Views: 3849

thank you. other digikey parts:

P68.0CACT-ND RES METAL FILM 68.0 OHM 1/4W 1%
P1.50KCACT-ND RES METAL FILM 1.50K OHM 1/4W 1%
151-1081-ND CONN USB JACK TYPE B HORIZON R/A
ATMEGA8-16PU-ND IC AVR MCU 8K 16MHZ 5V 28DIP
1109PHCT-ND CAP 50V .1UF AXIAL CERAMIC X7R
by psc
Sat Nov 15, 2008 9:55 pm
Forum: V-USB
Topic: zener 3.6 500mW / 12mhz crystal digikey confirmation
Replies: 2
Views: 3849

zener 3.6 500mW / 12mhz crystal digikey confirmation

hi all,

anyone can have a look at my digikey order?

crystal 12 mhz:
http://search.digikey.com/scripts/dksea ... me=X058-ND

zener diode 3.6 500mW:
http://search.digikey.com/scripts/dksea ... 7B-TPCT-ND

i read that 250mW is better, but non-stock... or only surface mount.

thanks for your time