Objective Development Forums

It's still not working on my end. Since I am using INT0 (d+) and INT1 (-d) I was not able to write a custom IRS for INT0 (already used in usbdrv), but I was able to use IRS INT1 vector. But I have a trigger on INT1 even when powering my board from an external supply (USB not even connected). Is this...

Still trying to figure this out. I tried using this piece of code:



I am using PCINT0 = D-: is it the right way?

What I'm worried about is that XTAL2 is the same pins as INT0.
Will also use SPI, then on what pins I should connect D+ / D-?

From a post on avr freaks:
Rather than enabling pullups by setting bits in the PORTx register, the tiny841 has a separate PUEx register.

Any hints?

Can anyone confirm that this "new" ATTINY is supported by VUSB:
http://www.atmel.ca/devices/ATTINY441.aspx

Thanks for your time!
Cheers

Yes I have a standalone mode (powering my circuit from another source than USB). I want the same firmware to work without the USB calls. So if I understand correctly, I can:

- use UsbPoll()
- watching for a pin change (D- or D+)

Any code example?

Hi all, I am trying to detect if there's a USB cable connected (i am using the v-usb midi firmware by horo if it matter). I am wondering what's the best method. I cannot change the pcb so I am looking for a software solution... Any insight would be useful (using register?, a special variable in v-us...

solata10, V-USB-MIDI can send but also receive midi: void usbFunctionWriteOut(uchar * data, uchar len) { //if(data[0] == 11 && data[3] == 99 && data[2] == 1) {... } i would recommend to use MIDI Non-Registered Parameters: http://www.philrees.co.uk/nrpnq.htm don't forget to: #define U...

Hi Kuba, this error: [ 197.065664] usb 2-1: device not accepting address 6, error -71 has nothing to do with libusb-config. you need to see something like this in dmesg: [ 1727.956432] usb 3-2: new low speed USB device using uhci_hcd [ 1728.119279] usb 3-2: configuration #1 chosen from 1 choice [ 17...

Hi Kuba, You can see the error in the ouput of dmesg: [ 197.065664] usb 2-1: device not accepting address 6, error -71 I don't know exactly what is the problem but for sure, before attempting to ./set-led on, you have fix this error. the usb connection (vcc, d-, d+, gnd)? 3.6 V zener diodes or volta...

plug your device (via usb) and do "dmesg". what do you get?
pat

Hi, Replace the folder named "usbdrv" in your project (Powerswitch?) with the one from http://www.obdev.at/products/vusb/download.html You need to tell the compiler what clock to use: F_CPU = 20000000 avr-gcc -Wall -Os -Iusbdrv -I. -mmcu=$(DEVICE) -DF_CPU=$(F_CPU) ..... Here's for your inf...

hi,

i wrote a tutorial for V-USB:
http://www.workinprogress.ca/v-usb-tuto ... mega-tiny/

i hope it will help people using V-USB.
patrick

Hi Christian, I am trying to save times in communication between the firmware and the host. The host application is sending CMD_POLL every 10 ms: nBytes = usb_control_msg(x->dev_handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, CMD_POLL, 0, 0, (char *)buffer, sizeof(buffer), 10); The fir...

Hi Horo, How nice! From 8 ms to 2 ms just by changing the bmAttributes. It's working very well, however i have this warning(?) when plugging the device: [ 8848.352583] usb 1-2: new low speed USB device using uhci_hcd and address 14 [ 8848.456365] usb 1-2: config 1 interface 1 altsetting 0 endpoint 0...

Hi Horo, Thank you for your update! :D About the speed, there is no way to make it faster when using usbSetInterrupt() (up to 8 bytes may be passed in one call) which take 8ms (homemade measurement). The only way i found was to get rid of MIDI_NOTEOFF since i only want to trig a sound percussion and...