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from typing import List | |
import re | |
with open('gt9110_config.txt') as f: | |
lines = list(f) | |
output = [] | |
last_addr = 0x8046 | |
for line in lines: | |
line = re.sub("#.*$", '', line).rstrip() | |
if line: | |
addr, content = line.split(' ') | |
addr = int(addr, 16) | |
content = int(content, 16) | |
assert addr == last_addr + 1 | |
output.append(content.to_bytes(1, byteorder='big')) | |
last_addr = addr | |
def calculate_checksum(cfg: bytes): | |
raw_cfg_len = len(cfg) - 2 | |
check_sum = 0 | |
# for (i = 0; i < raw_cfg_len; i++) | |
for value in cfg[:-2]: | |
check_sum += value | |
check_sum %= 256 | |
check_sum = ((~check_sum) + 1) % 256; | |
print(f"fixing checksum to 0x{check_sum:02x} (was 0x{cfg[-2]:02x})") | |
return cfg[:-2] + check_sum.to_bytes(1, byteorder='big') + cfg[-1:] | |
fixed_checksum = calculate_checksum(b''.join(output)) | |
with open('goodix_9110_cfg.bin', 'wb') as out_f: | |
out_f.write(fixed_checksum) |
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