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FT232R: use native Python time.sleep() on Linux #6

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FT232R: use native Python time.sleep() on Linux #6

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26 changes: 5 additions & 21 deletions drivers/ftdi/dmx_drivers/ftdi/ft232r.py
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@
from os import path
from platform import system
from typing import List
import time

from pylibftdi import Device, Driver, LibraryMissingError

Expand All @@ -42,36 +43,19 @@

if system() == "Linux":

from ctypes import cdll, c_long, byref, Structure

Driver._lib_search["libftdi"] = tuple([
path.join(DRIVER_PATH, "libftdi.so"),
path.join(DRIVER_PATH, "libftdi.so.1"),
path.join(DRIVER_PATH, "libftdi1.so")
] + list(Driver._lib_search["libftdi"]))

_LIBC = cdll.LoadLibrary("libc.so.6")

class timespec(Structure):
"""A timespec."""

_fields_ = [("tv_sec", c_long), ("tv_nsec", c_long)]

def wait_ms(milliseconds):
"""Wait for a specified number of milliseconds."""
dummy = timespec()
sleeper = timespec()
sleeper.tv_sec = int(milliseconds / 1000)
sleeper.tv_nsec = (milliseconds % 1000) * 1000000
_LIBC.nanosleep(byref(sleeper), byref(dummy))
time.sleep(milliseconds / 1000)

def wait_us(nanoseconds):
"""Wait for a specified number of nanoseconds."""
dummy = timespec()
sleeper = timespec()
sleeper.tv_sec = int(nanoseconds / 1000000)
sleeper.tv_nsec = (nanoseconds % 1000) * 1000
_LIBC.nanosleep(byref(sleeper), byref(dummy))
def wait_us(microseconds):
"""Wait for a specified number of microseconds."""
time.sleep(microseconds / 1000000)

elif system() == "Windows":

Expand Down