I've been interested in hardware programming recently but 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. Can someone ensure or deny this? ...
I have a project where an ATtiny2313V is controlling a 7x5 LED matrix to display scrolling text. To display the text, I built a font which is stored in the flash with the rest of the program. The whole program, including the entire font, takes up 1106 bytes. But when I load it into the chip, it doesn't seem to run; instead it just ligh...
I have to store instuctions, commands that I will be receiving via serial. The commands will be 8 bits long. I'd like to use Enumerations to deal with them in my code. Only a enumeration corresponds to a ... on this platform I think a 16 bit integer. I need to preserve transparancy between command name, and its value. So as to avoid ha...
So IN an embedded systems unit, that i'm taking at uni next year, we will learn that dynamic data structures are a bad thing to have in an embedded system program. but the lecture notes don't go into why. Now i'm working on a moderate scale, embedded systems\ 'LURC' controller, mostly just takes advantages of the peripheral of the "Butt...
Ever since I heard about google's new language Go I wanted to use it for microcontroller programming. In particular Atmel AVR micro-controllers like the Atmega series. Is there a Go port for this architecture? ...
I have a binary file that I've disassembled using avr-objcopy. The interrupt vector table looks like: 00000000 : ; VECTOR TABLE 0: 13 c0 rjmp .+38 ; 0x28, RESET 2: b8 c1 rjmp .+880 ; 0x374, INT0 4: fd cf rjmp .-6 ; 0x0 6: fc cf rjmp .-8 ; 0x0 8: fb cf ...
I want to be able to turn my PC on and off using an IR-remote sensor that is connected via USB to the PC. The sensor is a custom PCB implemented with an AVR microprocessor and V-USB software USB-implementation. Now, turning off the PC is no problem with software, but is there any way to turn ON the PC using USB? (Please note, I'm not t...
Hello, I've been thinking quite some time about 'moving on' to MCU programming, but the problem is I've never worked with any microcontrollers or similar. As I've been told, AVR and PIC are the most common microcontrollers among hobbyists, and apparently most people suggest AVR for newcomers like me, due to its 'C-friendly architecture'...
What is the best way to realize wireless communication between an embedded system (based on an AVR controller) and the iPhone? I think there are only two options: either WiFi or BlueTooth. The range is not really a problem, since both devices should stay in the same room. I have no idea, if there are any useful WiFi boards that can be c...
I've got some C code I'm targeting for an AVR. The code is being compiled with avr-gcc, basically the gnu compiler with the right backend. What I'm trying to do is create a callback mechanism in one of my event/interrupt driven libraries, but I seem to be having some trouble keeping the value of the function pointer. To start, I have ...
Hi, I'm trying to create an embedded outdoor display of bus arrival times at my university. I'd like the device to utilize my school's secured WiFi network to show arrival time updates determined from a server script I have running. I was hoping to get some advice on the high-level operation of this thing -- would it be better for the d...
On my AVR I have an array of chars that hold color intensity information in the form of {R,G,B,x,R,G,B,x,...} (x being an unused byte). Is there any simple way to write a long int (32-bits) to char myArray[4*LIGHTS] so I can write a 0x00BBGGRR number easily? My typecasting is rough, and I'm not sure how to write it. I'm guessing jus...
I have a .c file with the following uint8_t buffer[32] I have a .S file where I want to do the following cpi r29, buffer+sizeof(buffer) The second argument for cpi muste be an immediate value, not a location. But unfortunately sizeof() is a C operator. Both files are compiled to separate object files and linked together afterward...
This tutorial for programming these starts with programming the Ravens and Jackdaw with a Windows box. Can I do those initial steps with avrdude on a Linux or OS X machine instead? If so, how? Is there any risk of bricking the hardware if I just try? I have a USB JTAG ICE MKii clone, which is supposed to work for this. I'm totally...
I've got a programming device called USB AVR JTAG-ISP v. 1.2. Where can I find drivers and a good IDE for it? ...
Ok, so I have 3 devices. an AVR Butterfly microcontroller, set up with USART A Bifferboard, running Debian, using a custom made program for serial. A Desktop machine running Br@y's. So I'm trying to make the Bifferboard send serial to the AVR, But the AVR never recieves the signal, (We've checked the wires) But if i connect the AVR to ...
I am writing C code for an AVR chip. The code is heavy on interrupt serivce routines which wait on serial ports, ADCs and timers. The ISRs write to buffers which the main loop examines when it gets to them. I design the buffers so that ISRs can update them while the main loop is reading them. I want to verify that this works. I have uni...
I'm attempting to compile Arduino code in the Eclipse IDE using WinAVR and the AVR IDE plugin, and I'm running into one major stumbling block - when I try to compile the code I get the following error: /usr/bin/sh: g++: command not found make: *** [main.o] Error 127 Yeah, I bet not...I'm using Windows Vista. I have the paths to WinAVR...
I have what I hope is a simple question pertaining to the Atmel AVR microcontrollers. So I want to use the ATTiny85's Analog Comparator to determine if a signal is above or below a threshold. This signal is normally "floating" and pulled toward ground when "active" (i.e. it's an active low - open collector signal). If I enable the pullup...
I've spent a good while getting my AVR development system set up with the full GCC tool chain (everything is the most recent current stable version) and I have solved most issues with it but one. This following code gives me an error which I just don't get. The AVR assembly manual states that the sbi instruction can accept 0-7 as a cons...