Preliminary Lua bindings for hidapi
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- Subject: Preliminary Lua bindings for hidapi
- From: KHMan <keinhong@...>
- Date: 2012年5月09日 04:20:40 +0800
Hi all,
Here's something for embedded hardware people...
I have a preliminary binding for hidapi[1] working (on WinXP).
hidapi is a cross-platform library for working with USB HID
devices and on Win32, it allows for convenient driverless
interfacing -- enough for low data rate stuff and simple to use
versus the alternatives.[2]
All hidapi API calls are (mostly) implemented. However, things
like Unicode strings are currently truncated to ASCII, so a proper
"nice-and-sane" release still needs work. The binding code is
already all non-platform-specific, I think.
I don't think I want to maintain a repository in the long term and
do releases, so if anyone wants to play with it or incorporate it
into a relevant codebase, I'm more than happy to shovel it to you.
The usual Lua-like license can be used.
Not all of the binding has been tested, but enumeration works,
sending and receiving reports using a PIC18 with a vendor-defined
USB HID works.
Sample (edited) snippets from test script:
==========================================
local hid = require "luahidapi"
hid.init()
local dev = hid.open(DEVICE_VID, DEVICE_PID)
local mstr = dev:getstring("manufacturer")
print("Manufacturer String: "..mstr)
local pstr = dev:getstring("product")
print("Product String: "..pstr)
local tx = "ABCD" -- write default report 0
local result = dev:write(tx)
print("Writing "..tx.." to device")
local rx -- read default report 0
dev:set("noblock")
for i = 1, 10 do
rx = dev:read(4)
if rx == "" then print("Waiting...")
else break end
for j = 1,200000 do end -- delay
end
print("Read "..rx.." from device")
dev:close()
hid.exit()
[1] http://www.signal11.us/oss/hidapi/
[2] WinUSB, libusb-win32, libusbx-win, ...
--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia