79 lines
2.3 KiB
Lua
Executable File
79 lines
2.3 KiB
Lua
Executable File
#! /usr/bin/env lua
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--[[
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fluksod.lua - Lua part of fluksod
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Copyright (C) 2011 Bart Van Der Meerssche <bart.vandermeerssche@flukso.net>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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]]--
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require 'dbg'
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require 'nixio'
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require 'nixio.fs'
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local spi = require 'flukso.spi'
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DAEMON = os.getenv('DAEMON') or 'fluksod'
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DAEMON_PATH = os.getenv('DAEMON_PATH') or '/var/run/' .. DAEMON
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O_RDWR_NONBLOCK = nixio.open_flags('rdwr', 'nonblock')
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POLLIN = nixio.poll_flags('in')
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function mkfifos(input)
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local path = string.format('%s/%s/', DAEMON_PATH, input)
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nixio.fs.mkdirr(path)
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nixio.fs.unlink(path .. 'in') --> clean up mess from previous run
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nixio.fs.unlink(path .. 'out') --> idem
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nixio.fs.mkfifo(path .. 'in', '644')
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nixio.fs.mkfifo(path .. 'out', '644')
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local fdin = nixio.open(path .. 'in', O_RDWR_NONBLOCK)
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local fdout = nixio.open(path .. 'out', O_RDWR_NONBLOCK)
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return { fd = fdin, --> need this entry for nixio.poll
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fdin = fdin,
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fdout = fdout,
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events = POLLIN,
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revents = 0,
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line = fdin:linesource() }
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end
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local uart = mkfifos('uart')
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local ctrl = mkfifos('ctrl')
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local delta = mkfifos('delta')
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local fds = { uart, ctrl, delta }
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local spidev = nixio.open('/dev/spidev0.0', O_RDWR_NONBLOCK)
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while true do
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if nixio.poll(fds, -1) then
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if delta.revents == POLLIN then
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--> TODO flush the delta fd after each POLLIN
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local msg = spi.new_msg('delta', delta.line())
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msg:parse()
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msg:encode()
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msg:tx(spidev)
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nixio.nanosleep(0, 10e7) --> 10ms
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msg:rx(spidev)
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msg:decode()
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--> dbg.vardump(msg)
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delta.fdout:write(msg.decoded.cmd .. ' ' .. table.concat(msg.decoded, ' ') .. '\n')
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end
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end
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end
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