abs()
acos()
and()
array_clear()
array_copy()
array_crc16()
array_crc32()
array_delete()
array_getdata16()
array_getdata32()
array_getdata64()
array_getdataflt32()
array_getdataflt64()
array_getdata()
array_getstring()
array_insert()
array_isvalid()
array_new()
array_printdata()
array_printstring()
array_remove()
array_resize()
array_setdata16()
array_setdata32()
array_setdata64()
array_setdataflt32()
array_setdataflt64()
array_setdata()
array_setstring()
array_size()
asin()
atan2()
atan()
beep()
bin()
bit()
cam_color()
cam_grab()
cam_load()
cam_rect()
ceil()
centerex()
center()
chr()
clear()
close()
cmdlist()
cmd()
cos()
crc16()
crc32()
datetime()
date()
day()
debug()
dec()
defnz()
def()
deg2rad()
dlg_new()
dlg_show()
dlg_delete()
dlg_addimage()
dlg_addlabel()
dlg_addcheckbox()
dlg_addinput()
eq()
estop()
exec()
exists()
exit()
exp10()
exp2()
exp()
extout1()
extout2()
e()
file_append()
file_close()
file_delete()
file_flush()
file_open()
flood()
floor()
for()
getparam()
ge()
gt()
hex()
hour()
if()
inc()
isnum()
isuiready()
jog()
land()
le()
lnand()
lnor()
lnot()
log10()
log2()
log()
lor()
lt()
lxnor()
lxor()
match()
max()
md5_f()
md5()
midiin_channel()
midiin_ctrl()
midiin_note()
midiin_prog()
midi_ctrl()
midi_isplaying()
midi_noteOff()
midi_noteOn()
midi_play()
midi_prog()
midi_stop()
millisec()
minute()
min()
mist()
mmtosetunit()
mmtounit()
month()
msg()
msgex()
nand()
nan()
ne()
nop()
nor()
notexists()
not()
open()
or()
outpwm()
out()
pause()
pi()
pk_analog()
pk_digital()
pow()
print()
pythr()
py()
rad2deg()
rand()
remparam()
return()
rgb2hue()
rgb2lum()
rgb2name()
rgb2sat()
roundup()
round()
rubik()
second()
serial_addlistener()
serial_close()
serial_config()
serial_info()
serial_list()
serial_open()
serial_readarray()
serial_readdata()
serial_readflush()
serial_read()
serial_remlistener()
serial_writearray()
serial_writedata16()
serial_writedata32()
serial_writedata()
serial_writeflush()
serial_write()
setparam()
settings()
setunittomm()
setunit()
sha256_f()
sha256()
shl()
shr()
sign()
sin()
siren()
sleep()
sound_isplaying()
sound_load()
sound_play()
sound_stop()
sound_unload()
spindle()
sqrt()
sqr()
startcode()
startfn()
start()
status()
stop()
strlen()
str()
tan()
tomachineuv()
tomachinexy()
tomachine()
toworkuv()
toworkxy()
towork()
trunc()
unittomm()
url()
usb_addlistener()
usb_close()
usb_info()
usb_list()
usb_open()
usb_readarray()
usb_readdata()
usb_read()
usb_remlistener()
usb_writearray()
usb_writedata()
usb_write()
xnor()
xor()
year()
Sidebar
expr:functions:func-usb_read
usb_read()
Reads data from USB device and prints its size to output window.
Syntax
usb_read(path); usb_read(path, size); usb_read(path, size, timeout);
Parameters
Examples
Read 8 bytes of data:
path = "\\?\hid#vid_045e&pid_028e&ig_00#8&1fa5fd5b&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}"; result = usb_read(path, 8, 50);
result:
8
Read USB packet size:
path = "\\?\hid#vid_045e&pid_028e&ig_00#8&1fa5fd5b&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}"; result = usb_read(path, 0, 50);
result:
14
Read data until buffer is full:
path = "\\?\hid#vid_045e&pid_028e&ig_00#8&1fa5fd5b&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}"; result = usb_read(path, -1, 50);
result:
266
See also
expr/functions/func-usb_read.txt · Last modified: 2023/02/15 11:27 by 127.0.0.1