Objective Development Forums

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...

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...

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...

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...

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...

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

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...

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

Roger,

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

Cheers!
Pat

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

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...

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...

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

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