| from os.path import join |
| from glob import glob |
| |
| |
| def find_gpio_base(path="/sys/class/gpio/"): |
| pattern = "gpiochip*" |
| for gc in glob(join(path, pattern)): |
| with open(join(gc, "label")) as f: |
| label = f.readline().strip() |
| if label == "1e780000.gpio": |
| with open(join(gc, "base")) as f: |
| return int(f.readline().strip()) |
| # trigger a file not found exception |
| open(join(path, "gpiochip")) |
| |
| |
| GPIO_BASE = find_gpio_base() |
| |
| |
| def convertGpio(name): |
| offset = int("".join(list(filter(str.isdigit, name)))) |
| port = list(filter(str.isalpha, name.upper())) |
| a = ord(port[-1]) - ord("A") |
| if len(port) > 1: |
| a += 26 |
| base = a * 8 + GPIO_BASE |
| return base + offset |