def go():
# Wrapper for better error handling/recovery at top level.
#
try:
loop.run_forever()
except BaseException as exc:
from usb import is_vcp_active
is_debug = is_vcp_active()
if is_debug and isinstance(exc, KeyboardInterrupt):
# preserve GUI state, but want to see where we are
print("KeyboardInterrupt")
raise
elif isinstance(exc, SystemExit):
# Ctrl-D and warm reboot cause this, not bugs
raise
else:
# show stacktrace for debug photos
try:
import uio, ux
tmp = uio.StringIO()
sys.print_exception(exc, tmp)
msg = tmp.getvalue()
del tmp
print(msg)
ux.show_fatal_error(msg)
except: pass
# securely die (wipe memory)
if not is_debug:
try:
import callgate
callgate.show_logout(1)
except: pass
def die_with_debug(exc):
from usb import is_vcp_active
is_debug = is_vcp_active()
if is_debug and isinstance(exc, KeyboardInterrupt):
# preserve GUI state, but want to see where we are
print("KeyboardInterrupt")
raise exc
elif isinstance(exc, SystemExit):
# Ctrl-D and warm reboot cause this, not bugs
raise exc
else:
# show stacktrace for debug photos
try:
import uio, ux
tmp = uio.StringIO()
sys.print_exception(exc, tmp)
msg = tmp.getvalue()
del tmp
print(msg)
ux.show_fatal_error(msg)
except:
pass
# securely die (wipe memory)
if not is_debug:
try:
import callgate
callgate.show_logout(1)
except:
pass
async def monitor_usb():
# Provide a helpful message when virtual serial port is connected.
# Without this, they have to press enter or something to see they are connected.
from usb import is_vcp_active
u = pyb.USB_VCP()
was_connected = u.isconnected()
while 1:
await sleep_ms(100)
conn = u.isconnected()
if conn and not was_connected:
# this direct write bypasses vcp_lockdown code.
if is_vcp_active():
u.write(b"\r\nWelcome to Coldcard! Press ^C to stop GUI and enter REPL.\r\n")
else:
u.write(b"\r\nColdcard developer features disabled.\r\n")
was_connected = conn
async def dev_enable_vcp(*a):
# Enable USB serial port emulation, for devs.
#
from usb import is_vcp_active
if is_vcp_active():
await ux_show_story("""The USB virtual serial port is already enabled.""")
return
was = pyb.usb_mode()
pyb.usb_mode(None)
if was and 'MSC' in was:
pyb.usb_mode('VCP+MSC')
else:
pyb.usb_mode('VCP+HID')
# allow REPL access
ckcc.vcp_enabled(True)
await ux_show_story("""\
The USB virtual serial port has now been enabled. Use a real computer to connect to it.""")
