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#!/usr/bin/env python3
import subprocess
import os
import re
import datetime
from pathlib import Path
def cpp_preprocess(input_path, cpp='cpp'):
return subprocess.check_output([cpp, '-P', input_path]).decode()
def gen_isr_header(f, cpp='cpp'):
stripped_code = cpp_preprocess(args.input, args.use_cpp)
armed = False
for line in stripped_code.splitlines():
line = line.strip()
if armed:
if not line.startswith('.word'):
break
word, value = line.split()
assert word == '.word'
if value == '0':
yield None
else:
yield value
else:
if line.startswith('g_pfnVectors:'):
armed = True
else:
raise ValueError('Cannot find interrupt vector definition!')
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--use-cpp', type=str, default=os.getenv('CPP', 'cpp'), help='cpp (C preprocessor) executable to use')
parser.add_argument('-g', '--generate-include-guards', action='store_true', help='Whether to generate include guards')
parser.add_argument('input', help='Input stm32****_startup.s file')
args = parser.parse_args()
print('/* AUTOGENERATED FILE! DO NOT MODIFY! */')
print(f'/* Generated {datetime.datetime.utcnow()} from {args.input} by {Path(__file__).name} */')
if args.generate_include_guards:
include_guard_id = '__ISR_HEADER_' + re.sub('[^A-Za-z0-9]', '_', args.input.split('/')[-1]) + '__'
print(f'#ifndef {include_guard_id}')
print(f'#define {include_guard_id}')
print()
for i, handler_name in enumerate(gen_isr_header(args.input, args.use_cpp)):
if handler_name is None:
print(f'/* IRQ {i} is undefined for this part. */')
else:
print(f'void {handler_name}(void); {" " * (30-len(handler_name))} /* {i:> 3} */')
print()
print(f'#define NUM_IRQs {i+1}')
print('extern uint32_t g_pfnVectors[NUM_IRQs];')
print('#define isr_vector g_pfnVectors')
print()
if args.generate_include_guards:
print(f'#endif /* {include_guard_id} */')
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