Zel, Simple GUI ATtiny85 Emulator

Very Simple GUI ATtiny85 Emulator, the purpose of this software is for education, how Assembly executed in microcontroller, as the time this readme writen it only support small subset AVR instruction and only support OUT instruction for Memmory Mapped IO used for "Hello World" of Embeded world, the blink LED, in this software you can Run/Stop, Step, Change Emulation Speed (default to 1MHz), and break execution for debugging.

Supported instruction is: NOP, RJMP, LDI, MOV, RCALL, ADD, SUB, PUSH, POP, INC, DEC, RET, BRNE, CP, CPI, OUT, OR, AND, BREAK, EOR, SBI, SUBI, SBCI, CBI, CLI, ADC, SBC, NEG, COM, CLR, TST, SWAP, SBIS, IN, SBIW, ORI, STS, LDS

Screenshot

screenshot0

screenshot1

Example Program

Simple Program

 .section .text
 .globl main
main:
 nop
void:
 rjmp main

avr-as -mmcu=attiny85 test.s -o test.o
avr-ld test.o -o test.elf
avr-objcopy -O ihex test.elf test.hex

C Program

#include <avr/io.h>#include <util/delay.h>#define BLINK_DELAY_MS 500
int main (void) {
 DDRB |= _BV(DDB0);
 while(1) {
 PORTB |= _BV(PORTB0);
 _delay_ms(BLINK_DELAY_MS);
 PORTB &= ~_BV(PORTB0);
 _delay_ms(BLINK_DELAY_MS);
 }
}

avr-gcc -Os -DF_CPU=1000000UL -mmcu=attiny85 -c main.c -o main.o
avr-gcc -mmcu=attiny85 main.o -o main.elf
avr-objcopy -O ihex -R .eeprom main.elf main.hex

License

This Project Licensed under GPLv3 license.

Notice

This project emulates the ATtiny85 microcontroller for educational purposes.

ATtiny85 and AVR® are trademarks of Microchip Technology Inc. This project is not affiliated with or endorsed by Microchip Technology Inc.