clean up and add README

1 files changed, 0 insertions, 104 deletions

diff --git a/ch340.lua b/ch340.lua
deleted file mode 100755
index 14c92bb..0000000
--- a/ch340.lua
+++ /dev/null
@@ -1,104 +0,0 @@
-local control = Proto("ch340.ctl", "CH340 Serial Control")

-local bulk = Proto("ch340.bulk", "CH340 Serial Data")

-

-local ep_dir_f = Field.new("usb.endpoint_address.direction")

-

-local REQ_TBL = {

-  [0x5F] = "CH341_REQ_READ_VERSION",

-  [0x9A] = "CH341_REQ_WRITE_REG",

-  [0x95] = "CH341_REQ_READ_REG",

-  [0xA1] = "CH341_REQ_SERIAL_INIT",

-  [0xA4] = "CH341_REQ_MODEM_CTRL",

-}

-

-local REG_TBL = {

-  [0x07] = "STATUS2",

-  [0x06] = "STATUS",

-  [0x13] = "DIVISOR",

-  [0x12] = "PRESCALER",

-  [0x18] = "LCR",

-  [0x25] = "LCR2",

-}

-

-control.fields.req = ProtoField.uint8("ch340.ctl.req", "Request", base.HEX, REQ_TBL)

-control.fields.reg1 = ProtoField.uint8("ch340.ctl.reg1", "Register 1", base.HEX, REG_TBL)

-control.fields.reg2 = ProtoField.uint8("ch340.ctl.reg2", "Register 2", base.HEX, REG_TBL)

-control.fields.val1 = ProtoField.uint8("ch340.ctl.val1", "Value 1", base.HEX)

-control.fields.val2 = ProtoField.uint8("ch340.ctl.val2", "Value 2", base.HEX)

-control.fields.modem = ProtoField.uint8("ch340.ctl.modem", "Modem", base.HEX)

-

-bulk.fields.data_in = ProtoField.bytes("ch340.bulk.data_in", "Data In")

-bulk.fields.data_out = ProtoField.bytes("ch340.bulk.data_out", "Data Out")

-

-local serial_tbl = DissectorTable.heuristic_new("ch340.serial_data", bulk)

-

-function control.dissector(buffer, pinfo, tree)

-  if buffer:captured_len() < 1 then return end

-

-  local sub = tree:add(control, buffer())

-

-  local req = buffer(0, 1)

-  sub:add(control.fields.req, req)

-

-  req = REQ_TBL[req:uint()] or ""

-  pinfo.cols.info:set("CH340 " .. req:sub(11))

-  if req == "CH341_REQ_WRITE_REG" or

-     req == "CH341_REQ_READ_REG" then

-

-    local reg2 = buffer(1, 1)

-    local reg1 = buffer(2, 1)

-    sub:add(control.fields.reg1, reg1)

-    sub:add(control.fields.reg2, reg2)

-

-    reg1 = reg1:uint()

-    reg2 = reg2:uint()

-

-    pinfo.cols.info:append(string.format(" %s/%s", (REG_TBL[reg1] or reg1), (REG_TBL[reg2] or reg2)))

-

-    if req == "CH341_REQ_WRITE_REG" then

-      local val2 = buffer(3, 1)

-      local val1 = buffer(4, 1)

-      sub:add(control.fields.val1, val1)

-      sub:add(control.fields.val2, val2)

-    end

-  elseif name == "CH341_REQ_MODEM_CTRL" then

-    sub:add(control.fields.modem, buffer(1))

-  end

-end

-

-function bulk.dissector(buffer, pinfo, tree)

-  if buffer:captured_len() < 1 then return end

-

-  local sub = tree:add(bulk, buffer())

-  pinfo.cols.info:set("CH340 Serial")

-

-  local ep_dir = ep_dir_f()() -- 0: h2d, 1: d2h

-  if ep_dir == 0 then

-    pinfo.cols.info:append(" out")

-    pinfo.p2p_dir = P2P_DIR_SENT

-    sub:add(bulk.fields.data_out, buffer())

-  else

-    pinfo.cols.info:append(" in")

-    pinfo.p2p_dir = P2P_DIR_RECV

-    sub:add(bulk.fields.data_in, buffer())

-  end

-

-  DissectorTable.try_heuristics("ch340.serial_data", buffer, pinfo, tree)

-end

-

-function usb_protocol_key(class, subclass, protocol)

-  return bit.bor(

-    bit.lshift(1, 31),

-    bit.lshift(bit.band(class, 0xff), 16),

-    bit.lshift(bit.band(subclass, 0xff), 8),

-    bit.band(protocol, 0xff)

-  )

-end

-

-local ctl_table = DissectorTable.get("usb.control")

-ctl_table:add(usb_protocol_key(0xff, 0x01, 0x02), control)

-ctl_table:add(0xffff, control)

-

-local bulk_table = DissectorTable.get("usb.bulk")

-bulk_table:add(usb_protocol_key(0xff, 0x01, 0x02), bulk)

-bulk_table:add(0xffff, bulk)