From 541f86da1086dec7005013b420d5f1cf96ca9569 Mon Sep 17 00:00:00 2001
From: Gregory Ling <gling@iastate.edu>
Date: Thu, 7 Nov 2024 21:14:38 -0600
Subject: [PATCH] Added uart ports and booting
---
chipforge/cli.py | 5 +-
chipforge/firmware/__init__.py | 3 +-
chipforge/firmware/boot.py | 30 +++
chipforge/firmware/flash.py | 241 +++++++++++-----------
chipforge/firmware/interface/ftdi.py | 11 +
chipforge/firmware/interface/hk.py | 3 +-
chipforge/firmware/interface/hk_base.py | 1 -
chipforge/firmware/interface/hk_ft232h.py | 15 +-
chipforge/firmware/interface/hk_pico.py | 17 +-
chipforge/firmware/interface/hk_stm32.py | 14 +-
chipforge/firmware/interface/hk_xilinx.py | 20 +-
chipforge/firmware/list.py | 11 +-
chipforge/firmware/projectid.py | 3 +-
chipforge/firmware/usb_reset.py | 33 +++
14 files changed, 247 insertions(+), 160 deletions(-)
create mode 100644 chipforge/firmware/boot.py
create mode 100644 chipforge/firmware/interface/ftdi.py
create mode 100644 chipforge/firmware/usb_reset.py
diff --git a/chipforge/cli.py b/chipforge/cli.py
index e0164b7..d314b11 100644
--- a/chipforge/cli.py
+++ b/chipforge/cli.py
@@ -8,7 +8,7 @@ import pkg_resources
from .autoupdate import autoupdate
from .fpga import fpga
-from .firmware import flash, projectid, list_devices, free
+from .firmware import flash, projectid, list_devices, free, boot
from . import colors as c
def get_version():
@@ -47,4 +47,5 @@ cli.add_command(flash)
cli.add_command(fpga)
cli.add_command(free)
cli.add_command(list_devices)
-cli.add_command(projectid)
\ No newline at end of file
+cli.add_command(projectid)
+cli.add_command(boot)
\ No newline at end of file
diff --git a/chipforge/firmware/__init__.py b/chipforge/firmware/__init__.py
index f7ca616..76e1ed2 100644
--- a/chipforge/firmware/__init__.py
+++ b/chipforge/firmware/__init__.py
@@ -1,4 +1,5 @@
from .flash import flash
from .list import list_devices
from .free import free
-from .projectid import projectid
\ No newline at end of file
+from .projectid import projectid
+from .boot import boot
\ No newline at end of file
diff --git a/chipforge/firmware/boot.py b/chipforge/firmware/boot.py
new file mode 100644
index 0000000..5b69858
--- /dev/null
+++ b/chipforge/firmware/boot.py
@@ -0,0 +1,30 @@
+import click
+from .. import colors as c
+from .interface.hk import HKSpiBase, pass_device_with_options
+from .usb_reset import usb_reset
+
+def abort_if_false(ctx, param, value):
+ if not value:
+ ctx.abort()
+
+@click.command()
+@click.option('--yes', is_flag=True, callback=abort_if_false,
+ expose_value=False,
+ prompt='Are you sure you want to boot everyone? That\'s not a very nice thing to do...')
+@pass_device_with_options
+def boot(hk: HKSpiBase):
+ """
+ Boot everyone user off of a usb device
+ """
+
+ if hasattr(hk, 'sysfs'):
+ if not usb_reset(sysfs=hk.sysfs):
+ click.echo(c.error('BOOT FAILED'))
+ return
+
+ if hasattr(hk, 'usb_device'):
+ if not usb_reset(busnum=hk.usb_device.bus, devnum=hk.usb_device.address):
+ click.echo(c.error('BOOT FAILED'))
+ return
+
+ click.echo(c.success('SUCCESS'))
\ No newline at end of file
diff --git a/chipforge/firmware/flash.py b/chipforge/firmware/flash.py
index 67b86ac..886cd13 100644
--- a/chipforge/firmware/flash.py
+++ b/chipforge/firmware/flash.py
@@ -20,113 +20,140 @@ def flash(hk: HKSpiBase, hex_path: str):
HEX_PATH should be either the path to a .hex file, or the path to a folder containing one.
"""
- if os.path.isdir(hex_path):
- for file in os.listdir(hex_path):
- if file.endswith('.hex'):
- hex_path = os.path.join(hex_path, file)
- break
- else:
- click.echo(c.error())
- click.echo(c.error(f'Could not find a {c.code(".hex")} file in {c.code(hex_path)}'))
- click.echo(c.error())
- exit(1)
-
- hk.identify()
- hk.cpu_reset_hold()
-
- time.sleep(0.5)
- hk.led0.toggle()
-
- hk.flash_reset()
- hk.flash_identify()
-
-
- buf = bytearray()
- addr = 0
- nbytes = 0
- total_bytes = 0
-
- erased = []
- def ensure_erased(addr):
- if (addr & hk.flash_sector_mask) not in erased:
- erased.append(addr & hk.flash_sector_mask)
- hk.flash_erase_sector(addr)
-
- click.echo(c.info('> Programming Flash'))
- with open(hex_path, mode='r') as f:
- x = f.readline()
- while x != '':
- if x[0] == '@':
- addr = int(x[1:],16)
- click.echo(f' Jumping to address 0x{addr:x}')
+ with hk:
+ if os.path.isdir(hex_path):
+ for file in os.listdir(hex_path):
+ if file.endswith('.hex'):
+ hex_path = os.path.join(hex_path, file)
+ break
else:
- # click.echo(x)
- values = bytearray.fromhex(x[0:len(x)-1])
- buf[nbytes:nbytes] = values
- nbytes += len(values)
- # click.echo(binascii.hexlify(values))
+ click.echo(c.error())
+ click.echo(c.error(f'Could not find a {c.code(".hex")} file in {c.code(hex_path)}'))
+ click.echo(c.error())
+ exit(1)
- x = f.readline()
+ hk.identify()
+ hk.cpu_reset_hold()
+
+ time.sleep(0.5)
+ hk.led0.toggle()
+
+ hk.flash_reset()
+ hk.flash_identify()
- if nbytes >= 256 or (x != '' and x[0] == '@' and nbytes > 0):
+
+ buf = bytearray()
+ addr = 0
+ nbytes = 0
+ total_bytes = 0
+
+ erased = []
+ def ensure_erased(addr):
+ if (addr & hk.flash_sector_mask) not in erased:
+ erased.append(addr & hk.flash_sector_mask)
+ hk.flash_erase_sector(addr)
+
+ click.echo(c.info('> Programming Flash'))
+ with open(hex_path, mode='r') as f:
+ x = f.readline()
+ while x != '':
+ if x[0] == '@':
+ addr = int(x[1:],16)
+ click.echo(f' Jumping to address 0x{addr:x}')
+ else:
+ # click.echo(x)
+ values = bytearray.fromhex(x[0:len(x)-1])
+ buf[nbytes:nbytes] = values
+ nbytes += len(values)
+ # click.echo(binascii.hexlify(values))
+
+ x = f.readline()
+
+ if nbytes >= 256 or (x != '' and x[0] == '@' and nbytes > 0):
+ total_bytes += nbytes
+ # click.echo('\n----------------------\n')
+ # click.echo(binascii.hexlify(buf))
+ # click.echo('\ntotal_bytes = {}'.format(total_bytes))
+
+ ensure_erased(addr)
+ hk.flash_write_page(addr, buf)
+
+ if nbytes > 256:
+ buf = buf[255:]
+ addr += 256
+ nbytes -= 256
+ click.echo('*** over 256 hit')
+ else:
+ buf = bytearray()
+ addr += 256
+ nbytes =0
+
+ if nbytes > 0:
total_bytes += nbytes
# click.echo('\n----------------------\n')
# click.echo(binascii.hexlify(buf))
- # click.echo('\ntotal_bytes = {}'.format(total_bytes))
+ # click.echo('\nnbytes = {}'.format(nbytes))
ensure_erased(addr)
hk.flash_write_page(addr, buf)
- if nbytes > 256:
- buf = buf[255:]
- addr += 256
- nbytes -= 256
- click.echo('*** over 256 hit')
- else:
- buf = bytearray()
- addr += 256
- nbytes =0
-
- if nbytes > 0:
- total_bytes += nbytes
- # click.echo('\n----------------------\n')
- # click.echo(binascii.hexlify(buf))
- # click.echo('\nnbytes = {}'.format(nbytes))
+ click.echo(c.success(f'> Programmed {c.code(total_bytes)} total bytes'))
- ensure_erased(addr)
- hk.flash_write_page(addr, buf)
+ click.echo(c.info('> Verifying Flash'))
- click.echo(c.success(f'> Programmed {c.code(total_bytes)} total bytes'))
+ buf = bytearray()
+ addr = 0
+ nbytes = 0
+ total_bytes = 0
- click.echo(c.info('> Verifying Flash'))
+ while (hk.is_busy()):
+ time.sleep(0.5)
- buf = bytearray()
- addr = 0
- nbytes = 0
- total_bytes = 0
+ # slave.write([CARAVEL_REG_WRITE, 0x0b, 0x01])
+ # slave.write([CARAVEL_REG_WRITE, 0x0b, 0x00])
- while (hk.is_busy()):
- time.sleep(0.5)
-
- # slave.write([CARAVEL_REG_WRITE, 0x0b, 0x01])
- # slave.write([CARAVEL_REG_WRITE, 0x0b, 0x00])
-
- with open(hex_path, mode='r') as f:
- x = f.readline()
- while x != '':
- if x[0] == '@':
- addr = int(x[1:],16)
- click.echo(f' Jumping to address 0x{addr:x}')
- else:
- values = bytearray.fromhex(x[0:len(x)-1])
- buf[nbytes:nbytes] = values
- nbytes += len(values)
+ with open(hex_path, mode='r') as f:
x = f.readline()
-
- if nbytes >= 256 or (x != '' and x[0] == '@' and nbytes > 0):
+ while x != '':
+ if x[0] == '@':
+ addr = int(x[1:],16)
+ click.echo(f' Jumping to address 0x{addr:x}')
+ else:
+ values = bytearray.fromhex(x[0:len(x)-1])
+ buf[nbytes:nbytes] = values
+ nbytes += len(values)
+ x = f.readline()
+
+ if nbytes >= 256 or (x != '' and x[0] == '@' and nbytes > 0):
+ total_bytes += nbytes
+
+ read_cmd = bytearray((CARAVEL_PASSTHRU, CMD_READ_LO_SPEED,(addr >> 16) & 0xff, (addr >> 8) & 0xff, addr & 0xff))
+ buf2 = hk.slave.exchange(read_cmd, nbytes)
+ if buf == buf2:
+ click.echo(f' Page 0x{addr:x} is valid')
+ else:
+ click.echo(c.error())
+ click.echo(c.error(f'Page 0x{addr:x} compare failed'))
+ click.echo(c.error(binascii.hexlify(buf)))
+ click.echo(c.error('<----->'))
+ click.echo(c.error(binascii.hexlify(buf2)))
+ click.echo(c.error())
+ exit(1)
+
+ if nbytes > 256:
+ buf = buf[255:]
+ addr += 256
+ nbytes -= 256
+ click.echo('*** over 256 hit')
+ else:
+ buf = bytearray()
+ addr += 256
+ nbytes =0
+
+ if nbytes > 0:
total_bytes += nbytes
- read_cmd = bytearray((CARAVEL_PASSTHRU, CMD_READ_LO_SPEED,(addr >> 16) & 0xff, (addr >> 8) & 0xff, addr & 0xff))
+ read_cmd = bytearray((CARAVEL_PASSTHRU, CMD_READ_LO_SPEED, (addr >> 16) & 0xff, (addr >> 8) & 0xff, addr & 0xff))
buf2 = hk.slave.exchange(read_cmd, nbytes)
if buf == buf2:
click.echo(f' Page 0x{addr:x} is valid')
@@ -139,36 +166,12 @@ def flash(hk: HKSpiBase, hex_path: str):
click.echo(c.error())
exit(1)
- if nbytes > 256:
- buf = buf[255:]
- addr += 256
- nbytes -= 256
- click.echo('*** over 256 hit')
- else:
- buf = bytearray()
- addr += 256
- nbytes =0
-
- if nbytes > 0:
- total_bytes += nbytes
-
- read_cmd = bytearray((CARAVEL_PASSTHRU, CMD_READ_LO_SPEED, (addr >> 16) & 0xff, (addr >> 8) & 0xff, addr & 0xff))
- buf2 = hk.slave.exchange(read_cmd, nbytes)
- if buf == buf2:
- click.echo(f' Page 0x{addr:x} is valid')
- else:
- click.echo(c.error())
- click.echo(c.error(f'Page 0x{addr:x} compare failed'))
- click.echo(c.error(binascii.hexlify(buf)))
- click.echo(c.error('<----->'))
- click.echo(c.error(binascii.hexlify(buf2)))
- click.echo(c.error())
- exit(1)
+ click.echo(c.success(f'> Verified {c.code(total_bytes)} total bytes'))
- click.echo(c.success(f'> Verified {c.code(total_bytes)} total bytes'))
+ click.echo(f'\nUART port is at {c.code(hk.uart_port)}')
- hk.cpu_reset_release()
+ hk.cpu_reset_release()
- hk.led0.toggle()
- time.sleep(0.3)
- hk.led0.toggle()
\ No newline at end of file
+ hk.led0.toggle()
+ time.sleep(0.3)
+ hk.led0.toggle()
\ No newline at end of file
diff --git a/chipforge/firmware/interface/ftdi.py b/chipforge/firmware/interface/ftdi.py
new file mode 100644
index 0000000..3f5ac08
--- /dev/null
+++ b/chipforge/firmware/interface/ftdi.py
@@ -0,0 +1,11 @@
+from pyftdi.ftdi import Ftdi
+from pyftdi.usbtools import UsbTools, UsbDeviceDescriptor
+from serial.tools.list_ports import comports
+from ..usb_reset import get_bus_dev_from_sysfs_path
+
+def get_ftdi_url(dev: UsbDeviceDescriptor):
+ return UsbTools.build_dev_strings('ftdi', Ftdi.VENDOR_IDS, Ftdi.PRODUCT_IDS, [(dev, 1)])[0][0]
+
+def get_uart_port(dev: UsbDeviceDescriptor):
+ ports = [port for port in comports() if port.vid == 0x0403 and port.pid == dev.pid and port.serial_number == dev.sn and get_bus_dev_from_sysfs_path(port.device_path) == (dev.bus, dev.address)]
+ return ports[-1].device
\ No newline at end of file
diff --git a/chipforge/firmware/interface/hk.py b/chipforge/firmware/interface/hk.py
index 2f89751..a718093 100644
--- a/chipforge/firmware/interface/hk.py
+++ b/chipforge/firmware/interface/hk.py
@@ -43,8 +43,7 @@ def pass_device_with_options(fn):
else:
drivers = ALL_DRIVERS
- with HKSpi(drivers=drivers, serial_number=serial_number, device_id=device_id, override=override) as hk:
- return fn(hk, *args, **kwargs)
+ fn(HKSpi(drivers=drivers, serial_number=serial_number, device_id=device_id, override=override), *args, **kwargs)
wrapped_fn.__name__ = fn.__name__
wrapped_fn.__doc__ = fn.__doc__
diff --git a/chipforge/firmware/interface/hk_base.py b/chipforge/firmware/interface/hk_base.py
index 6d7a2b2..557e403 100644
--- a/chipforge/firmware/interface/hk_base.py
+++ b/chipforge/firmware/interface/hk_base.py
@@ -23,7 +23,6 @@ class HKSpiBase:
serial_number = '' if self.serial_number == None else f'({c.default(self.serial_number)})'
return f'{c.code(self.device_id)} {serial_number} \t- {c.warning(self.__class__.__name__)} ({self.description})'
-
def identify(self):
click.echo(c.info('> Caravel Hardware Info:'))
diff --git a/chipforge/firmware/interface/hk_ft232h.py b/chipforge/firmware/interface/hk_ft232h.py
index 974cd6b..821477f 100644
--- a/chipforge/firmware/interface/hk_ft232h.py
+++ b/chipforge/firmware/interface/hk_ft232h.py
@@ -2,16 +2,19 @@ from .gpio import Gpio
from .defs import *
from pyftdi.ftdi import Ftdi
from pyftdi.spi import SpiController
-from pyftdi.usbtools import UsbTools
+from pyftdi.usbtools import UsbDeviceDescriptor
from .hk_base import HKSpiBase
+from .ftdi import get_ftdi_url, get_uart_port
class HKSpiFT232H(HKSpiBase):
description = 'eFabless Caravel Breakout'
- def __init__(self, url: str, serial_number: str):
- self.serial_number = serial_number
- self.device_id = url
-
+ def __init__(self, dev: UsbDeviceDescriptor):
+ self.usb_device = dev
+ self.serial_number = dev.sn
+ self.device_id = get_ftdi_url(dev)
+ self.uart_port = get_uart_port(dev)
+
def __enter__(self):
self.spi = SpiController(cs_count=1)
self.spi.configure(self.device_id)
@@ -39,5 +42,5 @@ class HKSpiFT232H(HKSpiBase):
# Find FT232H FTDI chips
ftdidevs = [d for d in Ftdi.list_devices() if d[0].description == 'Single RS232-HS']
# build_dev_strings returns [(url, descriptor)], we only want the URL
- return [HKSpiFT232H(UsbTools.build_dev_strings('ftdi', Ftdi.VENDOR_IDS, Ftdi.PRODUCT_IDS, (d,))[0][0], d[0].sn) for d in ftdidevs]
+ return [HKSpiFT232H(d[0]) for d in ftdidevs]
diff --git a/chipforge/firmware/interface/hk_pico.py b/chipforge/firmware/interface/hk_pico.py
index 499e404..b417bca 100644
--- a/chipforge/firmware/interface/hk_pico.py
+++ b/chipforge/firmware/interface/hk_pico.py
@@ -1,3 +1,4 @@
+from ..usb_reset import usb_reset
from .hk_base import HKSpiBase, DummyLED
from serial import Serial
from serial.tools.list_ports import comports
@@ -11,12 +12,10 @@ class PicoSPI:
def open(self):
if self.port == None:
- print([repr(f) for f in comports()])
- self.port = next((f.device for f in comports() if f.description == 'STM32 USB-SPI Adapter'), None)
- if self.port == None:
- print('Could not find Pico SPI adapter')
- exit(1)
+ print('Could not find Pico SPI adapter')
+ exit(1)
+ usb_reset(sysfs=self.sysfs)
self.serial = Serial(self.port)
def close(self):
@@ -63,9 +62,11 @@ class PicoSPI:
class HKSpiPico(HKSpiBase):
description = 'ISU Chip Fab Caravel PMOD Breakout'
- def __init__(self, comport):
- self.serial_number = comport.serial_number
- self.device_id = comport.device
+ def __init__(self, sysfs):
+ self.sysfs = sysfs
+ self.serial_number = sysfs.serial_number
+ self.device_id = sysfs.device
+ self.uart_port = next((f.device for f in comports() if f.location == sysfs.location[:-2] + '.0'), None)
self.slave = PicoSPI(self.device_id)
self.led0 = DummyLED()
self.led1 = DummyLED()
diff --git a/chipforge/firmware/interface/hk_stm32.py b/chipforge/firmware/interface/hk_stm32.py
index c038dc8..c507892 100644
--- a/chipforge/firmware/interface/hk_stm32.py
+++ b/chipforge/firmware/interface/hk_stm32.py
@@ -11,10 +11,8 @@ class STM32SPI:
def open(self):
if self.port == None:
- self.port = next((f.device for f in comports() if f.description == 'STM32 USB-SPI Adapter'), None)
- if self.port == None:
- print('Could not find USB SPI adapter')
- exit(1)
+ print('Could not find Pico SPI adapter')
+ exit(1)
self.serial = Serial(self.port, rtscts=True)
@@ -67,9 +65,11 @@ class STM32SPI:
class HKSpiSTM32(HKSpiBase):
description = 'Caravel FPGA'
- def __init__(self, comport):
- self.serial_number = comport.serial_number
- self.device_id = comport.device
+ def __init__(self, sysfs):
+ self.sysfs = sysfs
+ self.serial_number = sysfs.serial_number
+ self.device_id = sysfs.device
+ self.uart_port = None
self.slave = STM32SPI(self.device_id)
self.led0 = DummyLED()
self.led1 = DummyLED()
diff --git a/chipforge/firmware/interface/hk_xilinx.py b/chipforge/firmware/interface/hk_xilinx.py
index 39631a5..8ba8a00 100644
--- a/chipforge/firmware/interface/hk_xilinx.py
+++ b/chipforge/firmware/interface/hk_xilinx.py
@@ -2,7 +2,8 @@ from .hk_base import HKSpiBase, DummyLED
from pyftdi.jtag import JtagEngine
from pyftdi.bits import BitSequence
from pyftdi.ftdi import Ftdi
-from pyftdi.usbtools import UsbTools
+from pyftdi.usbtools import UsbDeviceDescriptor
+from .ftdi import get_ftdi_url, get_uart_port
def hexdump(data):
return " ".join(f'{d:02x}' for d in data)
@@ -19,11 +20,8 @@ class XilinxJtagSPI:
def open(self):
if self.url == None:
- try:
- self.url = HKSpiXilinx.list_devices()[0].device_id
- except:
- print('Could not find a Xilinx JTAG adapter')
- exit(1)
+ print('Could not find a Xilinx JTAG adapter')
+ exit(1)
self.jtag = JtagEngine(frequency=3E4)
self.jtag.configure(self.url)
@@ -95,9 +93,11 @@ class XilinxJtagSPI:
class HKSpiXilinx(HKSpiBase):
description = 'Xilinx FPGA'
- def __init__(self, url: str, serial_number: str):
- self.serial_number = serial_number
- self.device_id = url
+ def __init__(self, dev: UsbDeviceDescriptor):
+ self.usb_device = dev
+ self.serial_number = dev.sn
+ self.device_id = get_ftdi_url(dev)
+ self.uart_port = get_uart_port(dev)
self.slave = XilinxJtagSPI(self.device_id)
self.led0 = DummyLED()
self.led1 = DummyLED()
@@ -116,5 +116,5 @@ class HKSpiXilinx(HKSpiBase):
# Find Xilinx FPGA boards
ftdidevs = [d for d in Ftdi.list_devices() if d[0].description == 'Digilent USB Device']
# build_dev_strings returns [(url, descriptor)], we only want the URL
- return [HKSpiXilinx(UsbTools.build_dev_strings('ftdi', Ftdi.VENDOR_IDS, Ftdi.PRODUCT_IDS, (d,))[0][0], d[0].sn) for d in ftdidevs]
+ return [HKSpiXilinx(d[0]) for d in ftdidevs]
diff --git a/chipforge/firmware/list.py b/chipforge/firmware/list.py
index 0b7f24a..5062608 100644
--- a/chipforge/firmware/list.py
+++ b/chipforge/firmware/list.py
@@ -1,5 +1,5 @@
-#!/usr/bin/env python3
import click
+from .. import colors as c
from .interface.defs import *
from .interface.hk import ALL_DRIVERS, Claims, HKSpiBase
@@ -12,5 +12,10 @@ def list_devices():
with Claims() as claims:
devices = [device for driver in ALL_DRIVERS for device in driver.list_devices()]
- for i, device in enumerate(devices):
- click.echo(f' {i}) {device} {claims.get_owner_string(device)}')
\ No newline at end of file
+ for i, d in enumerate(devices):
+ serial_number = '' if d.serial_number == None else f' ({c.default(d.serial_number)})'
+
+ click.echo(f' {i}) {c.code(d.device_id)}{serial_number} {claims.get_owner_string(d)}'
+ + f'\n {c.warning(d.__class__.__name__)} ({d.description})'
+ + f'\n UART port: {c.code(d.uart_port)}'
+ + '\n')
\ No newline at end of file
diff --git a/chipforge/firmware/projectid.py b/chipforge/firmware/projectid.py
index e9b42aa..8e6b662 100644
--- a/chipforge/firmware/projectid.py
+++ b/chipforge/firmware/projectid.py
@@ -9,4 +9,5 @@ def projectid(hk: HKSpiBase):
"""
Read the project ID of a physical board
"""
- hk.identify()
\ No newline at end of file
+ with hk:
+ hk.identify()
\ No newline at end of file
diff --git a/chipforge/firmware/usb_reset.py b/chipforge/firmware/usb_reset.py
new file mode 100644
index 0000000..a922232
--- /dev/null
+++ b/chipforge/firmware/usb_reset.py
@@ -0,0 +1,33 @@
+import os
+import fcntl
+
+def get_bus_dev_from_sysfs_path(sysfs_path: str):
+ path = os.path.realpath(sysfs_path)
+ busnum = None
+ devnum = None
+ while path:
+ if os.path.exists(os.path.join(path, 'busnum')):
+ with open(os.path.join(path, 'busnum')) as busnum_file:
+ busnum = int(busnum_file.readline())
+ with open(os.path.join(path, 'devnum')) as devnum_file:
+ devnum = int(devnum_file.readline())
+ break
+ path = os.path.dirname(path)
+ return (busnum, devnum)
+
+def usb_reset(busnum=None, devnum=None, sysfs=None, sysfs_path=None, tty=None):
+ if tty:
+ sysfs_path = f'/sys/class/tty/{tty}/device'
+
+ if sysfs:
+ sysfs_path = sysfs.device_path
+
+ if sysfs_path:
+ busnum, devnum = get_bus_dev_from_sysfs(sysfs_path)
+
+ if busnum == None or devnum == None:
+ return False
+
+ with open(f'/dev/bus/usb/{("000" + str(busnum))[-3:]}/{("000" + str(devnum))[-3:]}', 'w', os.O_WRONLY) as port:
+ fcntl.ioctl(port, 21780)
+ return True
--
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