Objective Development Forums

However, when you open the "Game Controllers" applet in the Windows Control Panel, you see two identically named controllers. IMHO, the strings come from .INF file, [Strings] section. But Windows uses its own .INF files for HID devices, so you probably have no chance. But you can install ...

...two diodes in place of a 5V to 3.3V regulator. I can't image how two diodes are supposed to drop the voltage down from 5V to 3.3V. A silicon diode has a forward voltage (Flussspannung) of about 0.7 V. Two diodes will drop the 5V down to 5V - (2* 0.7V) = 3.6V, which is sufficient low voltage for ...

I2C-tiny-USB uses the control endpoint to transfer data, therefore it's limited to 8 Bytes at a time. That's wrong. All versions of AVRUSB allow up to 254 bytes control data in both directions. Newer versions allow even more bytes. IMHO Windows limit control transfers to 4KB. However, the I2C-tiny-...

ATtiny2313: SUT[1:0-10] CKSEL[3:0-0100]. ATmega168: SUT[1:0-10] CKSEL[3:0-1100]. Calibration Byte = 240 → f = 12.8MHz. How should I use "libs-device" and "usbdrv?" ATtiny2313: Selects internal 8 MHz RC oscillator with 65 ms start-up time ATmega168: Selects low-power cry...

I read "products/avrusb/index.html" by an interpreter. I guess this will result in funny (or 大変) translations:-) I can interpret it to be able to work even if "12.8MHz" use "atmega168" … a device having "PLL" can work "only in Attiny45"...

No. Exception: When you use the 12.8 MHz module and synchronize dynamically (very new firmware), Timer0 (8bit) is used. I want to use AVR-USB but i also want to make use of a 16-bit timer. When using the 16-bit timer the avr usb stops working and vice versa. This has nothing to do with timers (or an...

What about using the built-in analog comparator of ATtiny and ATmega controllers for detecting true differential signals on D+ and D- wires? Of course, this will introduce using additional cycles for detecting single-ended states (so, 12 MHz is not sufficient) and another interrupt pin (or the new e...

I want to install "AVR-USB" with "At90usb162". Sounds a bit strange why someone need two USB device interfaces in one chip. IMHO the only use for it is connecting two computers. Can that case implement the usb function of "the full speed" that used "low speed"...

...i am wondering if a microcontroller that old is compatible with a new notebook Easiest way to program an AVR is using a parallel port. I use it without any circuitry between, only some wires. If no parallel port available, the solution is USB2LPT, you can see in community projects. However, to b...

> Can I use a ATTiny(24) to work as USB interface for a Arduino? Please specify what an Arduino should be (e.g. by typing a web address). >...i.e. the output of the ATTiny is connected to the input of the ATMega? So I guess it's a somehow ATmega based PCB with some interface. What is the interface? ...

> i changed my 1k5 Resistor on D+ to 2k2 in cause of the 5V supply (not 3.3V). The right resistor value for such a pull-up is 10 kΩ: UH(3.3V) = 3.3V * 15kΩ / (1.5kΩ + 15kΩ) = 3.0V UH(5.0V) = 5.0V * 15kΩ / (10kΩ + 15kΩ) = 3.0V 15kΩ is the host-side inte...

> I see that there is no > - bulk transfer > - interrupt transfer > - isochronus transfer > for low speed devices. USB spec. allows one interrupt pipe on low-speed devices, at least for IN direction (device->host), AFAIK nothing else. > ... i have seen BULK in the CDC project ... Windows does not pr...

> The plan is to establish a 10400 baud serial communication (car OBD2). > This will result in sending one bit every 96µs. > ... > UART ... I did not see a way to disable the stop-bit... You need a stop bit, otherwise, the start bit makes no sense! The UART receiver is awaiting a 1->0 transition to ...