def handle_modprobe_ehcihcd(insert=True):
if insert:
command = 'modprobe'
else:
command = 'rmmod'
# launch modprobe timeout of 30 seconds
v = OSTools.polling_popen([command, 'ehci_hcd'], timeout=30.0)
# polling_popen returns False upon failure
if v:
(ret, err) = v
else:
ret, err = '', ''
# rety 5 times while there is an error
retry_count = 5
while err and (retry_count > 0):
v = OSTools.polling_popen([command, 'ehci_hcd'], timeout=30.0)
if v:
ret, err = v
if ret:
logger.info("Process %s returned without error" % command)
break
retry_count -= 1
if err:
logger.error("Unable to excecute %s successfuly (%d left)." % (command, retry_count))
return (ret, err)
def goto_known_state():
# kill pppd
pid = OSTools.pppd_pid()
if pid != 0:
OSTools.pppd_terminate(pid)
# call rmmod
logger.warn("Cleaning up, removed ehci_hcd.")
OSTools.polling_popen(['rmmod', '-f', 'ehci_hcd'], timeout=30.0)
# remove power from usb hub
set_gpio_usbhub_power(on=False)
def _send_i2cget_read(self, port, chipadr, register):
i2c_chip = '0x%02x' % int(chipadr)
i2c_register = '0x%02x' % int(register)
args = ['i2cget', '-y', str(port), i2c_chip, i2c_register]
# process open
return OSTools.polling_popen(args, 5.0)
def turn_on_usbhub():
# two stages, first enable GPIO210 then modprobe usb_ehci
logger.info("Applying power to USB hub controller.")
# set gpio. wait to get a lock if need be.
set_gpio_usbhub_power(on=True)
handle_modprobe_ehcihcd(insert=True)
# check /dev/ttyUSB0
time.sleep(5)
## Check to see if we have a mf112 connected
try:
(ret, err) = OSTools.polling_popen(['lsusb'], 2.0)
lines = ret.strip().split('\n')
for line in lines:
sects = line.split(' ')
if len(sects) > 6:
if sects[5] == "19d2:0103":
os.popen('usb_modeswitch -v 0x19d2 -p 0x0103 -V 19d2 -P 0x0031 -M 5553424312345679000000000000061b000000020000000000000000000000')
logger.info("MF112 detected, running modeswitch")
time.sleep(10)
except:
logger.exception("Unable to check usb devices")
#### REMOVE!
#time.sleep(5)
#os.popen('usb_modeswitch -v 0x19d2 -p 0x0103 -V 19d2 -P 0x0031 -M 5553424312345679000000000000061b000000020000000000000000000000')
#time.sleep(5)
retry_count = 5
while retry_count > 0:
if exists('/dev/ttyUSB0'):
logger.info("Modem detected on ttyUSB0!")
break
else:
logger.error("Modem still not detected, %d retry attempts left." % retry_count)
time.sleep(4)
retry_count -= 1
return exists('/dev/ttyUSB0')
def _send_i2cset_write(self, port, chipadr, register, byte, mask=0):
"""Converts parameters to strings, and invokes i2cset"""
i2c_chip = "0x%02x" % int(chipadr)
i2c_register = "0x%02x" % int(register)
i2c_byte = "0x%02x" % int(byte)
# the default arguments passed to the function
# -y : no confirmation prompt
# PORT : the /dev/i2c-? port number to use
# CHIP : chip address
# REG : the register to write to
# BYTE : the byte of data to write
args = ['i2cset', '-y', str(port), i2c_chip, i2c_register, i2c_byte]
# A mask is used to select individual leds
# the register is read from the chip, and masked by MASK
if mask:
i2c_mask = "0x%02x" % int(mask)
if mask:
# arm linux i2cset requires the mask as a positional argument
args.insert(2, '-m')
args.insert(3, i2c_mask)
return OSTools.polling_popen(args, 5.0)
