scanner.bas

ＤＯＳ下的ＵＳＢ驱动源码,包括ＵＨＣＩ

'This sample retrieves the identity of an Epson Perfection 1670 scanner

defint a-z

cls

devadd%=1
in_endpoint%=1
out_endpoint%=2

'define structure of URB
type urbtype
  transaction_token as byte 'control (2Dh), in (69h), out (E1h) as hex code
  chain_end_flag  as byte
  dev_add         as byte
  end_point       as byte
  error_code      as byte
  status          as byte  'returned by dosuhci
  transaction_flags as word 'reserved
  buffer_off      as word  'for in/out
  buffer_seg      as word  'for in/out
  buffer_length   as word  'for in/out
  actual_length   as word  'for in/out
  setup_buffer_off as word 'for control
  setup_buffer_seg as word 'for control
  start_frame     as word  'reserved
  nr_of_packets   as word  'reserved - iso
  int_interval    as byte  'reserved
  error_count     as byte  'reserved
  timeout         as word  'reserved
  next_urb_off    as word  'reserved
  next_urb_seg    as word  'reserved
end type '32 byte long

dim urb as urbtype

dim buffer as string*1025
buffer=repeat$(1025,chr$(0)) 'return data here

'Command read from a trace
mid$(buffer,1,64)=chr$(&H12)+chr$(00)+chr$(00)+chr$(00)+chr$(&H33)+chr$(00)

'set up out request
  urb.transaction_token=&HE1
  urb.chain_end_flag=0
  urb.dev_add=devadd%
  urb.end_point=out_endpoint%
  urb.error_code=0
  urb.status=0
  urb.transaction_flags=0
  urb.buffer_off=varptr(buffer)
  urb.buffer_seg=varseg(buffer)
  urb.buffer_length=64
  urb.actual_length=64
  urb.setup_buffer_off=0
  urb.setup_buffer_seg=0
  urb.start_frame=0
  urb.nr_of_packets=0
  urb.int_interval=0
  urb.error_count=0
  urb.timeout=0
  urb.next_urb_off=0
  urb.next_urb_seg=0

'now call DosUHCI
reg 8,varseg(urb)
reg 4,varptr(urb)
call interrupt &H65


'invalid device address?
if urb.error_code=1 then
        cls : locate 14,23
	print "Invalid device address"
        end
end if

'transaction error?
if urb.status >1 then
        cls : locate 14,23
	print "Device does not respond"
        end
end if

print

for i=1 to 3

buffer=repeat$(1025,chr$(0)) 'return data here

'set up in request
  urb.transaction_token=&H69
  urb.chain_end_flag=0
  urb.dev_add=devadd%
  urb.end_point=in_endpoint%
  urb.error_code=0
  urb.status=0
  urb.transaction_flags=0
  urb.buffer_off=varptr(buffer)
  urb.buffer_seg=varseg(buffer)
  urb.buffer_length=64 '32 '16
  urb.actual_length=64
  urb.setup_buffer_off=0
  urb.setup_buffer_seg=0
  urb.start_frame=0
  urb.nr_of_packets=0
  urb.int_interval=0
  urb.error_count=0
  urb.timeout=0
  urb.next_urb_off=0
  urb.next_urb_seg=0

'now call DosUHCI
reg 8,varseg(urb)
reg 4,varptr(urb)
call interrupt &H65

print "Buffer:" left$(buffer,64)

next i

end