avr

I'm new to C++ programming, but have been working in C and Java for a long time. I'm trying to do an interface-like hierarchy in some serial protocol I'm working on, and keep getting the error: Undefined reference to 'operator delete(void*)' The (simplified) code follows below: PacketWriter.h: class PacketWriter { public: virtual ~PacketWriter() {} virtual uint8_t nextByte() = 0; } StringWriter.h: class StringWriter : public PacketWriter { public: StringWriter(const char* message); virtual uint8_t nextByte(); } The constructor and nextByte functions are implemented in StringWriter.cpp, but

I'm searching for an algorithm to multiply two integer numbers that is better than the one below. Do you have a good idea about that? (The MCU - AT Tiny 84/85 or similar - where this code runs has no mul/div operator) uint16_t umul16_(uint16_t a, uint16_t b) { uint16_t res=0; while (b) { if ( (b & 1) ) res+=a; b>>=1; a+=a; } return res; } This algorithm, when compiled for AT Tiny 85/84 using the avr-gcc compiler, is almost identical to the algorithm __mulhi3 the avr-gcc generates. avr-gcc algorithm: 00000106 <__mulhi3>: 106: 00 24 eor r0, r0 108: 55 27 eor r21, r21 10a: 04 c0 rjmp .+8 ; 0x114

I've been interested in hardware programming recently, but I have not started yet. I did some searching working, and have a vague idea: Arduino is a combination of both chip and breadboard. AVR is a single chip, and need to buy a breadboard to get started. Is that statement true or false? kersny AVR is just an integrated circuit microchip, made by Atmel. It looks something like this: Although they can be used by themselves, it takes a bit of hardware experience and some support components. The Arduino is an AVR processor running special code that lets you use the Arduino environment to program

My previous question, Android cannot talk to Arduino using AVRDUDE , has been resolved. I can now connect my Nexus 7 to my Arduino Uno. The full command I am running is this: /system/xbin/su (getting root here) /data/data/jackpal.androidterm/local/bin/avrdude -F -V -c arduino -p ATMEGA328P -P /dev/bus/usb/002/002 -b 115200 -C /data/data/jackpal.androidterm/local/etc/avrdude.conf -U flash:w:led.hex Here I am trying to put the hex file on the Arduino. I do however get the following error: avrdude: ser_open():can't set attributes for device "/dev/bus/usb/002/002": Inappropriate ioctl for device

I'm having trouble getting a rotary encoder to work properly with AVR micro controllers. The encoder is a mechanical ALPS encoder , and I'm using Atmega168 . Clarification I have tried using an External Interrupt to listen to the pins, but it seems like it is too slow. When Pin A goes high, the interrupt procedure starts and then checks if Pin B is high. The idea is that if Pin B is high the moment Pin A went high, then it is rotating counter clock-wise. If Pin B is low, then it is rotating clock-wise. But it seems like the AVR takes too long to check Pin B, so it is always read as high. I've