Objective Development Forums

@jokkebk - no the USB does not cause an issue with 31250 baud serial comms, I have successfuly programmed a MIDI-USB cable using a tiny4313 which can handle large streams of sysex in both directions. It sounds like you are getting an overrun because you are not doing any flow-control. You need to ma...

Here is mine. I have done several designs using V-USB. These have been done on the Mega8, Tiny2313, Tiny85 and Mega88 chips. To avoid the repeated exercise of doing a prototype for each processor I made a single pcb assembly that includes the USB connector for testing after code downloading, option...

Well there may be a (not quite so easy) way. I have used X360ce in the past to remap my PS2 pad's USB HID to Xinput. It can be a PITA to set up but it works (if your HID device code is well written).

If the software (MuseScore) can respond to keyboard maybe you can just map the piano keys to keyboard keys in your program? Composite devices can be done and they are easy to do by building your own report descriptor (the HUT1_12v2 document gives an example of some composite reports). The problem is...

I don't have experience with those MCUs. But most MCUs allow higher frequency than specified. I played Atmega8L (says 8M) and Atmega168 (says 10M) at 12MHz, and both worked fine. Yeah I'm going to give it a go at 12mhz. Managed to solder an ISP harness to the board and dump the firmware and fuses, ...

I picked up an unknown board for a couple of euros that turns out to have an ATmega329v on it, a small LCD, a couple of relays, and a few very small unidentifable ICs (could be voltage reg, temp sensor, sram, eeprom etc). I guess it might be out of a central heating control. One thing, every single ...

Ulao, you get provoked and yet you still try to help. You are a better man than me. Good job I am not a mod here. Out of respect for the kind people at ObDev who spent countless hours writing this library (not DRIVER!) for us to play with for FREE, I'm going to keep my mouth shut.

So how come V-USB does not come with a makefile? You're right it doesn't. It comes with 8 of them: $ find . -name Makefile ./vusb-20120109/examples/custom-class/commandline/Makefile ./vusb-20120109/examples/custom-class/firmware/Makefile ./vusb-20120109/examples/hid-custom-rq/commandline/Makefile ....

Hey, I have a project where an atmega8/16/32 or any microcontroller really, transfers data between two usb devices (in my case, pen drives). I do not want to use a host controller, that's done. I thought of implementing the usb protocol myself, but soon realized I may have overestimated my abilitie...

I think you will be out of luck there, there are ASM source files that are included into the project depending on the speed that you have defined. If I remember correctly reading that 12Mhz is quite tight to get the timing right. Even if you do manage to get 8mhz working, how many cycles will be fre...

Thanks, didn't know about them. I got them them from Digikey, I think I paid about $1 each for 25 I'll have to check though.

Thanks, will give it a try and test with MacOSX. BTW - whats the reason it won't work under Win7?

I'm not sure from reading your main post, but you've got 2 different boards right? An eval kit and a board you've made yourself? If so I think it's safe to assume that you have not changed the v-usb code to match the new hardware. As Martin said, INT0 is needed by default by V-USB so if instead you ...

horo, I dont see where the OP was talking about the bootloader code size? Though this is a good point to make, bigger chips will not change that. If you need a chip with a lot of flash get the atmeg328. Right, the OP (me) wasn't talking about bootloader but it is a valid point as I've been thinking...

I don't think the 4313 (4k Version of 2313) has an internal high speed oscillator. I thought the only MCUs with this were the 25/45/85 and maybe the x61 series.