663 lines
25 KiB
TypeScript
663 lines
25 KiB
TypeScript
import { CPU, AVRTimer, timer0Config, timer1Config, timer2Config, AVRUSART, usart0Config, AVRIOPort, portAConfig, portBConfig, portCConfig, portDConfig, portEConfig, portFConfig, portGConfig, portHConfig, portJConfig, portKConfig, portLConfig, avrInstruction, AVRADC, adcConfig, AVRSPI, spiConfig, AVRTWI, twiConfig, ATtinyTimer1, attinyTimer1Config } from 'avr8js';
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import { PinManager } from './PinManager';
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import { hexToUint8Array } from '../utils/hexParser';
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import { I2CBusManager } from './I2CBusManager';
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import type { I2CDevice } from './I2CBusManager';
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/**
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* AVRSimulator - Emulates Arduino Uno (ATmega328p) using avr8js
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*
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* Features:
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* - CPU emulation at 16MHz
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* - Timer0/Timer1/Timer2 support (enables millis(), delay(), PWM)
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* - USART support (Serial)
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* - GPIO ports (PORTB, PORTC, PORTD)
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* - ADC support (analogRead())
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* - PWM monitoring via OCR register polling
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* - Pin state tracking via PinManager
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*/
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// OCR register addresses → Arduino pin mapping for PWM (ATmega328P / Uno / Nano)
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const PWM_PINS_UNO = [
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{ ocrAddr: 0x47, pin: 6, label: 'OCR0A' }, // Timer0A → D6
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{ ocrAddr: 0x48, pin: 5, label: 'OCR0B' }, // Timer0B → D5
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{ ocrAddr: 0x88, pin: 9, label: 'OCR1AL' }, // Timer1A low byte → D9
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{ ocrAddr: 0x8A, pin: 10, label: 'OCR1BL' }, // Timer1B low byte → D10
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{ ocrAddr: 0xB3, pin: 11, label: 'OCR2A' }, // Timer2A → D11
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{ ocrAddr: 0xB4, pin: 3, label: 'OCR2B' }, // Timer2B → D3
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];
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// OCR register addresses → Arduino Mega pin mapping for PWM (ATmega2560)
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// Timers 0/1/2 same addresses; Timers 3/4/5 at higher addresses.
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const PWM_PINS_MEGA = [
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{ ocrAddr: 0x47, pin: 13, label: 'OCR0A' }, // Timer0A → D13
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{ ocrAddr: 0x48, pin: 4, label: 'OCR0B' }, // Timer0B → D4
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{ ocrAddr: 0x88, pin: 11, label: 'OCR1AL' }, // Timer1A → D11
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{ ocrAddr: 0x8A, pin: 12, label: 'OCR1BL' }, // Timer1B → D12
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{ ocrAddr: 0xB3, pin: 10, label: 'OCR2A' }, // Timer2A → D10
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{ ocrAddr: 0xB4, pin: 9, label: 'OCR2B' }, // Timer2B → D9
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// Timer3 (0x80–0x8D, but OCR3A/B/C at 0x98/0x9A/0x9C)
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{ ocrAddr: 0x98, pin: 5, label: 'OCR3AL' }, // Timer3A → D5
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{ ocrAddr: 0x9A, pin: 2, label: 'OCR3BL' }, // Timer3B → D2
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{ ocrAddr: 0x9C, pin: 3, label: 'OCR3CL' }, // Timer3C → D3
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// Timer4 (OCR4A/B/C at 0xA8/0xAA/0xAC)
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{ ocrAddr: 0xA8, pin: 6, label: 'OCR4AL' }, // Timer4A → D6
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{ ocrAddr: 0xAA, pin: 7, label: 'OCR4BL' }, // Timer4B → D7
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{ ocrAddr: 0xAC, pin: 8, label: 'OCR4CL' }, // Timer4C → D8
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// Timer5 (OCR5A/B/C at 0x128/0x12A/0x12C — extended I/O)
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{ ocrAddr: 0x128, pin: 46, label: 'OCR5AL' }, // Timer5A → D46
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{ ocrAddr: 0x12A, pin: 45, label: 'OCR5BL' }, // Timer5B → D45
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{ ocrAddr: 0x12C, pin: 44, label: 'OCR5CL' }, // Timer5C → D44
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];
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/**
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* ATmega2560 port-bit → Arduino Mega pin mapping.
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* Index = bit position (0–7). -1 = not exposed on the Arduino Mega header.
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*/
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const MEGA_PORT_BIT_MAP: Record<string, number[]> = {
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// PA0-PA7 → D22-D29
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'PORTA': [22, 23, 24, 25, 26, 27, 28, 29],
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// PB0=D53(SS), PB1=D52(SCK), PB2=D51(MOSI), PB3=D50(MISO), PB4-PB7=D10-D13
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'PORTB': [53, 52, 51, 50, 10, 11, 12, 13],
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// PC0-PC7 → D37, D36, D35, D34, D33, D32, D31, D30 (reversed)
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'PORTC': [37, 36, 35, 34, 33, 32, 31, 30],
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// PD0=D21(SCL), PD1=D20(SDA), PD2=D19(RX1), PD3=D18(TX1), PD7=D38
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'PORTD': [21, 20, 19, 18, -1, -1, -1, 38],
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// PE0=D0(RX0), PE1=D1(TX0), PE3=D5, PE4=D2, PE5=D3
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'PORTE': [0, 1, -1, 5, 2, 3, -1, -1],
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// PF0-PF7 → A0-A7 (pin numbers 54-61)
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'PORTF': [54, 55, 56, 57, 58, 59, 60, 61],
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// PG0=D41, PG1=D40, PG2=D39, PG5=D4
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'PORTG': [41, 40, 39, -1, -1, 4, -1, -1],
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// PH0=D17(RX2), PH1=D16(TX2), PH3=D6, PH4=D7, PH5=D8, PH6=D9
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'PORTH': [17, 16, -1, 6, 7, 8, 9, -1],
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// PJ0=D15(RX3), PJ1=D14(TX3)
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'PORTJ': [15, 14, -1, -1, -1, -1, -1, -1],
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// PK0-PK7 → A8-A15 (pin numbers 62-69)
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'PORTK': [62, 63, 64, 65, 66, 67, 68, 69],
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// PL0=D49, PL1=D48, PL2=D47, PL3=D46, PL4=D45, PL5=D44, PL6=D43, PL7=D42
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'PORTL': [49, 48, 47, 46, 45, 44, 43, 42],
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};
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/**
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* Reverse of MEGA_PORT_BIT_MAP: Arduino Mega pin → { portName, bit }.
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* Pre-built for fast setPinState() lookups.
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*/
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const MEGA_PIN_TO_PORT = (() => {
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const map: Record<number, { portName: string; bit: number; port?: AVRIOPort }> = {};
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for (const [portName, pins] of Object.entries(MEGA_PORT_BIT_MAP)) {
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pins.forEach((pin, bit) => {
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if (pin >= 0) map[pin] = { portName, bit };
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});
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}
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return map;
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})();
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// OCR register addresses → ATtiny85 pin mapping for PWM
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// Timer0: OC0A→PB0, OC0B→PB1 (ATtiny85 Timer0 OCR regs at 0x56, 0x5C)
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// Timer1: OC1A→PB1, OC1B→PB4 (ATtinyTimer1 OCR regs from attinyTimer1Config)
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const PWM_PINS_TINY85 = [
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{ ocrAddr: 0x56, pin: 0, label: 'OCR0A' }, // Timer0A → PB0
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{ ocrAddr: 0x5C, pin: 1, label: 'OCR0B' }, // Timer0B → PB1
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{ ocrAddr: 0x4E, pin: 1, label: 'OCR1A' }, // Timer1A → PB1 (attinyTimer1Config.OCR1A)
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{ ocrAddr: 0x4B, pin: 4, label: 'OCR1B' }, // Timer1B → PB4 (attinyTimer1Config.OCR1B)
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];
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/**
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* ATtiny85 PORTB config — registers are at different addresses than ATmega328P.
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* ATtiny85: PINB=0x36, DDRB=0x37, PORTB=0x38 (vs ATmega: 0x23/0x24/0x25)
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*/
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const attiny85PortBConfig = {
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PIN: 0x36,
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DDR: 0x37,
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PORT: 0x38,
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externalInterrupts: [] as never[],
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};
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/** Ordered list of Mega ports with their avr8js configs */
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const MEGA_PORT_CONFIGS = [
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{ name: 'PORTA', config: portAConfig },
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{ name: 'PORTB', config: portBConfig },
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{ name: 'PORTC', config: portCConfig },
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{ name: 'PORTD', config: portDConfig },
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{ name: 'PORTE', config: portEConfig },
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{ name: 'PORTF', config: portFConfig },
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{ name: 'PORTG', config: portGConfig },
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{ name: 'PORTH', config: portHConfig },
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{ name: 'PORTJ', config: portJConfig },
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{ name: 'PORTK', config: portKConfig },
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{ name: 'PORTL', config: portLConfig },
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];
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export class AVRSimulator {
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private cpu: CPU | null = null;
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/** Peripherals kept alive by reference so GC doesn't collect their CPU hooks */
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private peripherals: unknown[] = [];
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private portB: AVRIOPort | null = null;
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private portC: AVRIOPort | null = null;
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private portD: AVRIOPort | null = null;
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/** Extra ports used by the Mega (A, E–L); keyed by port name */
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private megaPorts: Map<string, AVRIOPort> = new Map();
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private megaPortValues: Map<string, number> = new Map();
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private adc: AVRADC | null = null;
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public spi: AVRSPI | null = null;
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public usart: AVRUSART | null = null;
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public twi: AVRTWI | null = null;
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public i2cBus: I2CBusManager | null = null;
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private program: Uint16Array | null = null;
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private running = false;
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private animationFrame: number | null = null;
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public pinManager: PinManager;
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private speed = 1.0;
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/** 'uno' for ATmega328P boards (Uno, Nano); 'mega' for ATmega2560; 'tiny85' for ATtiny85 */
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private boardVariant: 'uno' | 'mega' | 'tiny85';
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/** Cycle-accurate pin change queue — used by timing-sensitive peripherals (e.g. DHT22). */
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private scheduledPinChanges: Array<{ cycle: number; pin: number; state: boolean }> = [];
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/** Serial output buffer — subscribers receive each byte or line */
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public onSerialData: ((char: string) => void) | null = null;
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/** Fires whenever the sketch changes Serial baud rate (Serial.begin) */
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public onBaudRateChange: ((baudRate: number) => void) | null = null;
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/**
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* Fires for every digital pin transition with a millisecond timestamp
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* derived from the CPU cycle counter (cycles / CPU_HZ * 1000).
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* Used by the oscilloscope / logic analyzer.
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*/
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public onPinChangeWithTime: ((pin: number, state: boolean, timeMs: number) => void) | null = null;
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private lastPortBValue = 0;
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private lastPortCValue = 0;
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private lastPortDValue = 0;
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private lastOcrValues: number[] = [];
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constructor(pinManager: PinManager, boardVariant: 'uno' | 'mega' | 'tiny85' = 'uno') {
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this.pinManager = pinManager;
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this.boardVariant = boardVariant;
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}
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private get pwmPins() {
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if (this.boardVariant === 'mega') return PWM_PINS_MEGA;
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if (this.boardVariant === 'tiny85') return PWM_PINS_TINY85;
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return PWM_PINS_UNO;
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}
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/**
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* Load compiled hex file into simulator
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*/
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loadHex(hexContent: string): void {
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console.log('Loading HEX file...');
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const bytes = hexToUint8Array(hexContent);
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// ATmega328P: 32 KB = 16 384 words. ATmega2560: 256 KB = 131 072 words.
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// ATtiny85: 8 KB = 4 096 words, 512 bytes SRAM.
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const progWords = this.boardVariant === 'mega' ? 131072 : this.boardVariant === 'tiny85' ? 4096 : 16384;
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// ATmega2560 data space: 0x0000–0x21FF = 8704 bytes total.
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// avr8js: data.length = sramBytes + registerSpace (0x100 = 256).
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// So sramBytes must be >= 8704 − 256 = 8448 to fit RAMEND=0x21FF on the stack.
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// ATmega328P RAMEND = 0x08FF; default 8192 is already a safe over-alloc.
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// ATtiny85 RAMEND = 0x025F; 512 bytes SRAM.
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const sramBytes = this.boardVariant === 'mega' ? 8448 : this.boardVariant === 'tiny85' ? 512 : 8192;
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this.program = new Uint16Array(progWords);
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for (let i = 0; i < bytes.length; i += 2) {
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this.program[i >> 1] = (bytes[i] || 0) | ((bytes[i + 1] || 0) << 8);
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}
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console.log(`Loaded ${bytes.length} bytes into program memory`);
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this.cpu = new CPU(this.program, sramBytes);
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if (this.boardVariant === 'tiny85') {
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// ATtiny85: PORTB only (PB0-PB5), Timer1 via ATtinyTimer1, no USART
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this.portB = new AVRIOPort(this.cpu, attiny85PortBConfig as typeof portBConfig);
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this.adc = new AVRADC(this.cpu, adcConfig);
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this.peripherals = [new ATtinyTimer1(this.cpu, attinyTimer1Config)];
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// usart stays null — ATtiny85 has no hardware USART
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} else {
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// ATmega2560 has more vectors before the timers/USART (8 external INTs, etc.),
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// so the interrupt WORD addresses differ from ATmega328P.
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//
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// avr8js config values are WORD addresses = _VECTOR(N) * 2
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// (each JMP vector = 4 bytes = 2 words; cpu.pc * 2 == byte address).
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//
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// ATmega2560 word addresses (_VECTOR(N) → N * 2):
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// TIMER2_COMPA=_V(13)→0x1A TIMER2_COMPB=_V(14)→0x1C TIMER2_OVF=_V(15)→0x1E
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// TIMER1_CAPT=_V(16)→0x20 TIMER1_COMPA=_V(17)→0x22 TIMER1_COMPB=_V(18)→0x24
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// TIMER1_COMPC=_V(19)→0x26 TIMER1_OVF=_V(20)→0x28
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// TIMER0_COMPA=_V(21)→0x2A TIMER0_COMPB=_V(22)→0x2C TIMER0_OVF=_V(23)→0x2E
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// SPI_STC=_V(24)→0x30 USART0_RX=_V(25)→0x32
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// USART0_UDRE=_V(26)→0x34 USART0_TX=_V(27)→0x36
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// TWI=_V(39)→0x4E
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const isMega = this.boardVariant === 'mega';
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const activeTimer0Config = isMega
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? { ...timer0Config, compAInterrupt: 0x2A, compBInterrupt: 0x2C, ovfInterrupt: 0x2E }
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: timer0Config;
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const activeTimer1Config = isMega
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? { ...timer1Config, captureInterrupt: 0x20, compAInterrupt: 0x22, compBInterrupt: 0x24, ovfInterrupt: 0x28 }
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: timer1Config;
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const activeTimer2Config = isMega
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? { ...timer2Config, compAInterrupt: 0x1A, compBInterrupt: 0x1C, ovfInterrupt: 0x1E }
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: timer2Config;
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const activeUsart0Config = isMega
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? { ...usart0Config, rxCompleteInterrupt: 0x32, dataRegisterEmptyInterrupt: 0x34, txCompleteInterrupt: 0x36 }
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: usart0Config;
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const activeSpiConfig = isMega
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? { ...spiConfig, spiInterrupt: 0x30 }
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: spiConfig;
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const activeTwiConfig = isMega
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? { ...twiConfig, twiInterrupt: 0x4E }
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: twiConfig;
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this.spi = new AVRSPI(this.cpu, activeSpiConfig, 16000000);
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this.spi.onByte = (value) => { this.spi!.completeTransfer(value); };
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this.usart = new AVRUSART(this.cpu, activeUsart0Config, 16000000);
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this.usart.onByteTransmit = (value: number) => {
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if (this.onSerialData) this.onSerialData(String.fromCharCode(value));
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};
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this.usart.onConfigurationChange = () => {
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if (this.onBaudRateChange && this.usart) this.onBaudRateChange(this.usart.baudRate);
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};
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this.twi = new AVRTWI(this.cpu, activeTwiConfig, 16000000);
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this.i2cBus = new I2CBusManager(this.twi);
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this.peripherals = [
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new AVRTimer(this.cpu, activeTimer0Config),
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new AVRTimer(this.cpu, activeTimer1Config),
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new AVRTimer(this.cpu, activeTimer2Config),
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this.usart,
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this.spi,
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this.twi,
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];
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this.adc = new AVRADC(this.cpu, adcConfig);
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// ── GPIO ports ──────────────────────────────────────────────────────
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this.portB = new AVRIOPort(this.cpu, portBConfig);
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this.portC = new AVRIOPort(this.cpu, portCConfig);
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this.portD = new AVRIOPort(this.cpu, portDConfig);
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if (this.boardVariant === 'mega') {
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this.megaPorts.clear();
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this.megaPortValues.clear();
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for (const { name, config } of MEGA_PORT_CONFIGS) {
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this.megaPorts.set(name, new AVRIOPort(this.cpu, config));
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this.megaPortValues.set(name, 0);
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}
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}
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}
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this.lastPortBValue = 0;
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this.lastPortCValue = 0;
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this.lastPortDValue = 0;
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this.lastOcrValues = new Array(this.pwmPins.length).fill(0);
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this.setupPinHooks();
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const boardName = this.boardVariant === 'mega' ? 'ATmega2560'
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: this.boardVariant === 'tiny85' ? 'ATtiny85'
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: 'ATmega328P';
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console.log(`AVR CPU initialized (${boardName}, ${this.peripherals.length} peripherals)`);
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}
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/**
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* Expose ADC instance so components (potentiometer, etc.) can inject voltages
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*/
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getADC(): AVRADC | null {
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return this.adc;
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}
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/** Returns the CPU clock frequency in Hz (16 MHz for AVR). */
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getClockHz(): number {
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return 16_000_000;
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}
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/**
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* Returns the current CPU cycle count.
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* Used by timing-sensitive peripherals to schedule future pin changes.
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*/
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getCurrentCycles(): number {
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return this.cpu?.cycles ?? 0;
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}
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/**
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* Schedule a pin state change at a specific future CPU cycle count.
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* The change fires between AVR instructions, enabling cycle-accurate protocol simulation.
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* Used by DHT22 and other timing-sensitive single-wire peripherals.
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*/
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schedulePinChange(pin: number, state: boolean, atCycle: number): void {
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// Callers are expected to push entries in ascending cycle order.
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// Insert at the correct position to maintain sort (linear scan from end, O(1) for ordered pushes).
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let i = this.scheduledPinChanges.length;
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while (i > 0 && this.scheduledPinChanges[i - 1].cycle > atCycle) i--;
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this.scheduledPinChanges.splice(i, 0, { cycle: atCycle, pin, state });
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}
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/** Flush all scheduled pin changes whose target cycle has been reached. */
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private flushScheduledPinChanges(): void {
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if (this.scheduledPinChanges.length === 0 || !this.cpu) return;
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const now = this.cpu.cycles;
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while (this.scheduledPinChanges.length > 0 && this.scheduledPinChanges[0].cycle <= now) {
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const { pin, state } = this.scheduledPinChanges.shift()!;
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this.setPinState(pin, state);
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}
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}
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/**
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* Fire onPinChangeWithTime for every bit that differs between newVal and oldVal.
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* @param pinMap Optional explicit per-bit Arduino pin numbers (Mega).
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* @param offset Legacy pin offset (Uno/Nano): PORTB→8, PORTC→14, PORTD→0.
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*/
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private firePinChangeWithTime(
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newVal: number,
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oldVal: number,
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pinMap: number[] | null,
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offset = 0,
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): void {
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if (!this.onPinChangeWithTime || !this.cpu) return;
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const timeMs = this.cpu.cycles / 16_000;
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const changed = newVal ^ oldVal;
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for (let bit = 0; bit < 8; bit++) {
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if (changed & (1 << bit)) {
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const pin = pinMap ? pinMap[bit] : offset + bit;
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if (pin < 0) continue;
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const state = (newVal & (1 << bit)) !== 0;
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this.onPinChangeWithTime(pin, state, timeMs);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Monitor pin changes and update component states
|
||
*/
|
||
private setupPinHooks(): void {
|
||
if (!this.cpu) return;
|
||
console.log('Setting up pin hooks...');
|
||
|
||
if (this.boardVariant === 'tiny85') {
|
||
// ATtiny85: PORTB only, PB0-PB5 → pins 0-5 (offset = 0)
|
||
this.portB!.addListener((value) => {
|
||
if (value !== this.lastPortBValue) {
|
||
this.pinManager.updatePort('PORTB', value, this.lastPortBValue);
|
||
this.firePinChangeWithTime(value, this.lastPortBValue, null, 0);
|
||
this.lastPortBValue = value;
|
||
}
|
||
});
|
||
} else if (this.boardVariant === 'mega') {
|
||
// Mega: use explicit per-bit pin maps for all 11 ports
|
||
for (const [portName, port] of this.megaPorts) {
|
||
const pinMap = MEGA_PORT_BIT_MAP[portName];
|
||
this.megaPortValues.set(portName, 0);
|
||
port.addListener((value) => {
|
||
const old = this.megaPortValues.get(portName) ?? 0;
|
||
if (value !== old) {
|
||
this.pinManager.updatePort(portName, value, old, pinMap);
|
||
this.firePinChangeWithTime(value, old, pinMap);
|
||
this.megaPortValues.set(portName, value);
|
||
}
|
||
});
|
||
}
|
||
} else {
|
||
// Uno / Nano: simple 3-port setup
|
||
this.portB!.addListener((value) => {
|
||
if (value !== this.lastPortBValue) {
|
||
this.pinManager.updatePort('PORTB', value, this.lastPortBValue);
|
||
this.firePinChangeWithTime(value, this.lastPortBValue, null, 8);
|
||
this.lastPortBValue = value;
|
||
}
|
||
});
|
||
this.portC!.addListener((value) => {
|
||
if (value !== this.lastPortCValue) {
|
||
this.pinManager.updatePort('PORTC', value, this.lastPortCValue);
|
||
this.firePinChangeWithTime(value, this.lastPortCValue, null, 14);
|
||
this.lastPortCValue = value;
|
||
}
|
||
});
|
||
this.portD!.addListener((value) => {
|
||
if (value !== this.lastPortDValue) {
|
||
this.pinManager.updatePort('PORTD', value, this.lastPortDValue);
|
||
this.firePinChangeWithTime(value, this.lastPortDValue, null, 0);
|
||
this.lastPortDValue = value;
|
||
}
|
||
});
|
||
}
|
||
|
||
console.log('Pin hooks configured successfully');
|
||
}
|
||
|
||
/**
|
||
* Poll OCR registers and notify PinManager of PWM duty cycle changes
|
||
*/
|
||
private pollPwmRegisters(): void {
|
||
if (!this.cpu) return;
|
||
const pins = this.pwmPins;
|
||
for (let i = 0; i < pins.length; i++) {
|
||
const { ocrAddr, pin } = pins[i];
|
||
const ocrValue = this.cpu.data[ocrAddr];
|
||
if (ocrValue !== this.lastOcrValues[i]) {
|
||
this.lastOcrValues[i] = ocrValue;
|
||
this.pinManager.updatePwm(pin, ocrValue / 255);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Start simulation loop
|
||
*/
|
||
start(): void {
|
||
if (this.running || !this.cpu) {
|
||
console.warn('Simulator already running or not initialized');
|
||
return;
|
||
}
|
||
|
||
this.running = true;
|
||
console.log('Starting AVR simulation...');
|
||
|
||
// ATmega328p @ 16MHz
|
||
const CPU_HZ = 16_000_000;
|
||
const CYCLES_PER_MS = CPU_HZ / 1000;
|
||
|
||
// Cap: never execute more than 50ms worth of cycles in one frame.
|
||
// This prevents a runaway burst when the tab was backgrounded and
|
||
// then becomes visible again (browser may deliver a huge delta).
|
||
const MAX_DELTA_MS = 50;
|
||
|
||
let lastTimestamp = 0;
|
||
let frameCount = 0;
|
||
|
||
const execute = (timestamp: number) => {
|
||
if (!this.running || !this.cpu) return;
|
||
|
||
// Clamp delta so we never overshoot after a paused/backgrounded tab.
|
||
// MAX_DELTA_MS already handles large initial deltas (e.g. first frame),
|
||
// so no separate first-frame guard is needed.
|
||
const rawDelta = timestamp - lastTimestamp;
|
||
const deltaMs = Math.min(rawDelta, MAX_DELTA_MS);
|
||
lastTimestamp = timestamp;
|
||
|
||
const cyclesPerFrame = Math.floor(CYCLES_PER_MS * deltaMs * this.speed);
|
||
|
||
try {
|
||
for (let i = 0; i < cyclesPerFrame; i++) {
|
||
avrInstruction(this.cpu); // Execute the AVR instruction
|
||
this.cpu.tick(); // Update peripheral timers and cycles
|
||
if (this.scheduledPinChanges.length > 0) this.flushScheduledPinChanges();
|
||
}
|
||
|
||
// Poll PWM registers every frame
|
||
this.pollPwmRegisters();
|
||
|
||
frameCount++;
|
||
if (frameCount % 60 === 0) {
|
||
console.log(`[CPU] Frame ${frameCount}, PC: ${this.cpu.pc}, Cycles: ${this.cpu.cycles}`);
|
||
}
|
||
} catch (error) {
|
||
console.error('Simulation error:', error);
|
||
this.stop();
|
||
return;
|
||
}
|
||
|
||
this.animationFrame = requestAnimationFrame(execute);
|
||
};
|
||
|
||
this.animationFrame = requestAnimationFrame(execute);
|
||
}
|
||
|
||
/**
|
||
* Stop simulation
|
||
*/
|
||
stop(): void {
|
||
if (!this.running) return;
|
||
|
||
this.running = false;
|
||
if (this.animationFrame !== null) {
|
||
cancelAnimationFrame(this.animationFrame);
|
||
this.animationFrame = null;
|
||
}
|
||
this.scheduledPinChanges = [];
|
||
|
||
console.log('AVR simulation stopped');
|
||
}
|
||
|
||
/**
|
||
* Reset simulator (re-run program from scratch without recompiling)
|
||
*/
|
||
reset(): void {
|
||
this.stop();
|
||
if (this.program) {
|
||
// Re-use the stored hex content path: just reload
|
||
const sramBytes = this.boardVariant === 'mega' ? 8448 : this.boardVariant === 'tiny85' ? 512 : 8192;
|
||
console.log('Resetting AVR CPU...');
|
||
|
||
this.cpu = new CPU(this.program, sramBytes);
|
||
|
||
if (this.boardVariant === 'tiny85') {
|
||
this.portB = new AVRIOPort(this.cpu, attiny85PortBConfig as typeof portBConfig);
|
||
this.adc = new AVRADC(this.cpu, adcConfig);
|
||
this.peripherals = [new ATtinyTimer1(this.cpu, attinyTimer1Config)];
|
||
this.usart = null;
|
||
} else {
|
||
this.spi = new AVRSPI(this.cpu, spiConfig, 16000000);
|
||
this.spi.onByte = (value) => { this.spi!.completeTransfer(value); };
|
||
|
||
this.usart = new AVRUSART(this.cpu, usart0Config, 16000000);
|
||
this.usart.onByteTransmit = (value: number) => {
|
||
if (this.onSerialData) this.onSerialData(String.fromCharCode(value));
|
||
};
|
||
this.usart.onConfigurationChange = () => {
|
||
if (this.onBaudRateChange && this.usart) this.onBaudRateChange(this.usart.baudRate);
|
||
};
|
||
|
||
this.twi = new AVRTWI(this.cpu, twiConfig, 16000000);
|
||
this.i2cBus = new I2CBusManager(this.twi);
|
||
|
||
this.peripherals = [
|
||
new AVRTimer(this.cpu, timer0Config),
|
||
new AVRTimer(this.cpu, timer1Config),
|
||
new AVRTimer(this.cpu, timer2Config),
|
||
this.usart, this.spi, this.twi,
|
||
];
|
||
this.adc = new AVRADC(this.cpu, adcConfig);
|
||
|
||
this.portB = new AVRIOPort(this.cpu, portBConfig);
|
||
this.portC = new AVRIOPort(this.cpu, portCConfig);
|
||
this.portD = new AVRIOPort(this.cpu, portDConfig);
|
||
|
||
if (this.boardVariant === 'mega') {
|
||
this.megaPorts.clear();
|
||
this.megaPortValues.clear();
|
||
for (const { name, config } of MEGA_PORT_CONFIGS) {
|
||
this.megaPorts.set(name, new AVRIOPort(this.cpu, config));
|
||
this.megaPortValues.set(name, 0);
|
||
}
|
||
}
|
||
}
|
||
|
||
this.lastPortBValue = 0;
|
||
this.lastPortCValue = 0;
|
||
this.lastPortDValue = 0;
|
||
this.lastOcrValues = new Array(this.pwmPins.length).fill(0);
|
||
this.setupPinHooks();
|
||
|
||
console.log('AVR CPU reset complete');
|
||
}
|
||
}
|
||
|
||
isRunning(): boolean {
|
||
return this.running;
|
||
}
|
||
|
||
setSpeed(speed: number): void {
|
||
this.speed = Math.max(0.1, Math.min(10.0, speed));
|
||
console.log(`Simulation speed set to ${this.speed}x`);
|
||
}
|
||
|
||
getSpeed(): number {
|
||
return this.speed;
|
||
}
|
||
|
||
step(): void {
|
||
if (!this.cpu) return;
|
||
avrInstruction(this.cpu);
|
||
this.cpu.tick();
|
||
}
|
||
|
||
/**
|
||
* Set the state of an Arduino pin externally (e.g. from a UI button)
|
||
*/
|
||
setPinState(arduinoPin: number, state: boolean): void {
|
||
if (this.boardVariant === 'mega') {
|
||
const entry = MEGA_PIN_TO_PORT[arduinoPin];
|
||
if (entry) {
|
||
const port = this.megaPorts.get(entry.portName);
|
||
port?.setPin(entry.bit, state);
|
||
}
|
||
return;
|
||
}
|
||
if (this.boardVariant === 'tiny85') {
|
||
// ATtiny85: PB0-PB5 = pins 0-5
|
||
if (arduinoPin >= 0 && arduinoPin <= 5 && this.portB) {
|
||
this.portB.setPin(arduinoPin, state);
|
||
}
|
||
return;
|
||
}
|
||
// Uno / Nano
|
||
if (arduinoPin >= 0 && arduinoPin <= 7 && this.portD) {
|
||
this.portD.setPin(arduinoPin, state);
|
||
} else if (arduinoPin >= 8 && arduinoPin <= 13 && this.portB) {
|
||
this.portB.setPin(arduinoPin - 8, state);
|
||
} else if (arduinoPin >= 14 && arduinoPin <= 19 && this.portC) {
|
||
this.portC.setPin(arduinoPin - 14, state);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Send a byte to the Arduino serial port (RX) — as if typed in the Serial Monitor.
|
||
*/
|
||
serialWrite(text: string): void {
|
||
if (!this.usart) return;
|
||
for (let i = 0; i < text.length; i++) {
|
||
this.usart.writeByte(text.charCodeAt(i));
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Register a virtual I2C device on the bus (e.g. RTC, sensor).
|
||
*/
|
||
addI2CDevice(device: I2CDevice): void {
|
||
if (this.i2cBus) {
|
||
this.i2cBus.addDevice(device);
|
||
}
|
||
}
|
||
|
||
// ── Generic sensor registration (board-agnostic API) ──────────────────────
|
||
// AVR handles all sensor protocols locally via schedulePinChange,
|
||
// so these return false / no-op — the sensor runs its own frontend logic.
|
||
|
||
registerSensor(_type: string, _pin: number, _props: Record<string, unknown>): boolean { return false; }
|
||
updateSensor(_pin: number, _props: Record<string, unknown>): void {}
|
||
unregisterSensor(_pin: number): void {}
|
||
}
|