firstcommit

site/기초실습/files/asmtohex.py

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+#!/usr/bin/env python3
+import sys
+from pathlib import Path
+
+OPCODE = {
+    "NOP":     0x0,
+    "LOAD":    0x1,
+    "INC":     0x2,
+    "DEC":     0x3,
+    "JMP":     0x4,
+    "JZ":      0x5,
+    "JNZ":     0x6,
+    "LED_ON":  0x7,
+    "LED_OFF": 0x8,
+    "DELAY":   0x9,
+}
+
+def remove_comment(line):
+    return line.split(";")[0].strip()
+
+def parse_number(text):
+    text = text.strip()
+    if text.lower().startswith("0x"):
+        return int(text, 16)
+    if text.lower().startswith("0b"):
+        return int(text, 2)
+    return int(text, 10)
+
+def assemble(asm_text):
+    labels = {}
+    instructions = []
+    pc = 0
+
+    # 1차 패스: 라벨 주소 수집
+    for raw_line in asm_text.splitlines():
+        line = remove_comment(raw_line)
+
+        if not line:
+            continue
+
+        if line.endswith(":"):
+            label = line[:-1].strip()
+            if label in labels:
+                raise ValueError(f"중복 라벨: {label}")
+            labels[label] = pc
+            continue
+
+        if ":" in line:
+            label_part, inst_part = line.split(":", 1)
+            label = label_part.strip()
+            inst_line = inst_part.strip()
+
+            if label in labels:
+                raise ValueError(f"중복 라벨: {label}")
+
+            labels[label] = pc
+
+            if inst_line:
+                instructions.append(inst_line)
+                pc += 1
+
+            continue
+
+        instructions.append(line)
+        pc += 1
+
+    machine = []
+
+    # 2차 패스: 명령어 변환
+    for addr, line in enumerate(instructions):
+        parts = line.replace(",", " ").split()
+
+        if not parts:
+            continue
+
+        mnemonic = parts[0].upper()
+
+        if mnemonic not in OPCODE:
+            raise ValueError(f"{addr}: 알 수 없는 명령어: {mnemonic}")
+
+        opcode = OPCODE[mnemonic]
+        operand = 0
+
+        if len(parts) >= 2:
+            arg = parts[1]
+            if arg in labels:
+                operand = labels[arg]
+            else:
+                operand = parse_number(arg)
+
+        if operand < 0 or operand > 0x0FFF:
+            raise ValueError(f"{addr}: operand 범위 초과 0~4095: {operand}")
+
+        word = (opcode << 12) | (operand & 0x0FFF)
+        machine.append(word)
+
+    return machine, labels, instructions
+
+def main():
+    if len(sys.argv) != 2:
+        print("사용법: python asmtohex.py led.asm")
+        sys.exit(1)
+
+    asm_path = Path(sys.argv[1])
+
+    if not asm_path.exists():
+        print(f"파일 없음: {asm_path}")
+        sys.exit(1)
+
+    hex_path = asm_path.with_suffix(".hex")
+    asm_text = asm_path.read_text(encoding="utf-8")
+
+    machine, labels, instructions = assemble(asm_text)
+
+    with hex_path.open("w", encoding="utf-8") as f:
+        for word in machine:
+            f.write(f"{word:04X}\n")
+
+    print("라벨:")
+    for name, addr in labels.items():
+        print(f"  {name} = {addr}")
+
+    print()
+    print("기계어:")
+    for addr, word in enumerate(machine):
+        print(f"  {addr:02d}: {word:04X}    ; {instructions[addr]}")
+
+    print()
+    print(f"HEX 생성 완료: {hex_path}")
+
+if __name__ == "__main__":
+    main()