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import {
avrInstruction,
AVRTimer,
CPU,
timer0Config,
AVRIOPort,
AVRUSART,
portBConfig,
portCConfig,
portDConfig,
usart0Config
} from 'avr8js';
import { loadHex } from './intelhex';
// ATmega328p params
const FLASH = 0x8000;
export class AVRRunner {
readonly program = new Uint16Array(FLASH);
readonly cpu: CPU;
readonly timer: AVRTimer;
readonly portB: AVRIOPort;
readonly portC: AVRIOPort;
readonly portD: AVRIOPort;
readonly usart: AVRUSART;
readonly speed = 16e6; // 16 MHZ
private stopped = false;
constructor(hex: string) {
loadHex(hex, new Uint8Array(this.program.buffer));
this.cpu = new CPU(this.program);
this.timer = new AVRTimer(this.cpu, timer0Config);
this.portB = new AVRIOPort(this.cpu, portBConfig);
this.portC = new AVRIOPort(this.cpu, portCConfig);
this.portD = new AVRIOPort(this.cpu, portDConfig);
this.usart = new AVRUSART(this.cpu, usart0Config, this.speed);
}
async execute(callback: (cpu: CPU) => void) {
this.stopped = false;
for (;;) {
avrInstruction(this.cpu);
this.timer.tick();
this.usart.tick();
if (this.cpu.cycles % 50000 === 0) {
callback(this.cpu);
await new Promise((resolve) => setTimeout(resolve, 0));
if (this.stopped) {
break;
}
}
}
}
stop() {
this.stopped = true;
}
}
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