229 lines
6.1 KiB
Lua
Executable File
229 lines
6.1 KiB
Lua
Executable File
#!/usr/bin/env lua
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--[[
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fsync.lua - synchronize /etc/config/flukso settings with the sensor board
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via the fluksod ctrl fifos
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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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local dbg = require 'dbg'
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local nixio = require 'nixio'
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nixio.fs = require 'nixio.fs'
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local uci = require 'luci.model.uci'.cursor()
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local CTRL_PATH = '/var/run/spid/ctrl'
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local CTRL_PATH_IN = CTRL_PATH .. '/in'
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local CTRL_PATH_OUT = CTRL_PATH .. '/out'
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local O_RDWR_NONBLOCK = nixio.open_flags('rdwr', 'nonblock')
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local POLLIN = nixio.poll_flags('in')
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local POLL_TIMEOUT_MS = 1000
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local MAX_TRIES = 5
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local ctrl = { fdin = nixio.open(CTRL_PATH_IN, O_RDWR_NONBLOCK),
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fdout = nixio.open(CTRL_PATH_OUT, O_RDWR_NONBLOCK),
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events = POLLIN,
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revents = 0 }
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if ctrl.fdin == nil or ctrl.fdout == nil then
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print('Error. Unable to open the ctrl fifos.')
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print('Exiting...')
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os.exit(1)
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end
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ctrl.fd = ctrl.fdout -- need this entry for nixio.poll
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ctrl.line = ctrl.fdout:linesource()
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-- TODO acquire an exclusive lock on the ctrl fifos or exit
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local function send(ctrl, cmd)
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while ctrl.line() do end -- flush the out fifo
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for i = 1, MAX_TRIES do
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ctrl.fdin:write(cmd .. '\n')
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local poll, errno, errmsg = nixio.poll({ ctrl }, POLL_TIMEOUT_MS)
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if poll < 0 then
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print('Error. Poll failed with error message: ' .. errmsg)
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elseif poll == 0 then
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print('Error. Poll timed out after ' .. POLL_TIMEOUT_MS .. 'ms')
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elseif poll > 0 then
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reply = ctrl.line()
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if cmd:sub(1, 1) == 's' then
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if reply == cmd then
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print(reply .. ' .. ok')
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return reply
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else
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print(reply .. ' .. nok .. should be ' .. cmd .. ' instead')
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end
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elseif cmd:sub(1, 2) == reply:sub(1, 2) then
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print(reply .. ' .. ok')
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return reply
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else
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print(reply .. ' .. nok')
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end
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end
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end
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print(MAX_TRIES .. ' write attempts failed. Exiting ...')
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os.exit(2)
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end
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local function toc(num)
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return num - 1
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end
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-- parse and load /etc/config/flukso
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local flukso = uci:get_all('flukso')
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local HW_CHECK_OVERRIDE = (arg[1] == '-f')
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local MAX_SENSORS = tonumber(flukso.main.max_sensors)
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local MAX_ANALOG_SENSORS = tonumber(flukso.main.max_analog_sensors)
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local METERCONST_FACTOR = 0.449
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local GET_HW_VERSION = 'gh'
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local GET_HW_VERSION_R = '^gh%s+(%d+)%s+(%d+)$'
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local SET_ENABLE = 'se %d %d'
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local SET_PHY_TO_LOG = 'sp' -- with [1..MAX_SENSORS] arguments
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local SET_METERCONST = 'sm %d %d'
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local SET_COUNTER = 'sc %d %d'
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local COMMIT = 'ct'
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-- check hardware version
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local hw_major, hw_minor = send(ctrl, GET_HW_VERSION):match(GET_HW_VERSION_R)
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if hw_major ~= flukso.main.hw_major or hw_minor > flukso.main.hw_minor then
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print(string.format('Hardware check (major: %s, minor: %s) .. nok', hw_major, hw_minor))
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if hw_major ~= flukso.main.hw_major then
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print('Error. Major version does not match.')
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end
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if hw_minor > flukso.main.hw_minor then
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print('Error. Sensor board minor version is not supported by this package.')
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end
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if HW_CHECK_OVERRIDE then
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print('Overridden. Good luck!')
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else
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print('Use -f to override this check at your own peril.')
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os.exit(3)
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end
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else
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print(string.format('Hardware check (major: %s, minor: %s) .. ok', hw_major, hw_minor))
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end
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-- disable all ports
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for i = 1, MAX_SENSORS do
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local cmd = string.format(SET_ENABLE, toc(i), 0)
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send(ctrl, cmd)
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end
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-- populate phy_to_log
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local phy_to_log = {}
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for i = 1, MAX_SENSORS do
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if flukso[tostring(i)] ~= nil then
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if flukso[tostring(i)]['type'] == 'analog' and i > MAX_ANALOG_SENSORS then
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print(string.format('Error. Analog sensor %s should be less than or equal to max_analog_sensors (%s)', i, MAX_ANALOG_SENSORS))
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os.exit(4)
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end
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local ports = flukso[tostring(i)].port or {}
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for j = 1, #ports do
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if tonumber(ports[j]) > MAX_SENSORS then
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print(string.format('Error. Port numbering in sensor %s should be less than or equal to max_sensors (%s)', i, MAX_SENSORS))
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os.exit(5)
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else
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phy_to_log[toc(tonumber(ports[j]))] = toc(i)
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end
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end
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end
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end
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-- ports that are not in use are mapped to sensor id 0xff
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for i = 0, MAX_SENSORS - 1 do
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if not phy_to_log[i] then
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phy_to_log[i] = 0xff
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end
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end
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local cmd = SET_PHY_TO_LOG .. ' ' .. table.concat(phy_to_log, ' ', 0)
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send(ctrl, cmd)
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-- populate meterconst
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for i = 1, MAX_SENSORS do
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local cmd
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if flukso[tostring(i)] == nil then
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cmd = string.format(SET_METERCONST, toc(i), 0)
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elseif flukso[tostring(i)]['type'] == 'analog' then
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local voltage = tonumber(flukso[tostring(i)].voltage)
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local current = tonumber(flukso[tostring(i)].current)
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cmd = string.format(SET_METERCONST, toc(i), math.floor(METERCONST_FACTOR * voltage * current))
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elseif flukso[tostring(i)]['type'] == 'pulse'then
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local meterconst = tonumber(flukso[tostring(i)].constant)
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cmd = string.format(SET_METERCONST, toc(i), meterconst)
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else
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cmd = string.format(SET_METERCONST, toc(i), 0)
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end
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if cmd then send(ctrl,cmd) end
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end
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-- populate counter if reset_counters is set
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if flukso.main.reset_counters == '1' then
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for i = 1, MAX_SENSORS do
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local cmd = string.format(SET_COUNTER, toc(i), 0)
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send(ctrl, cmd)
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end
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uci:set('flukso', 'main', 'reset_counters', 0)
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uci:commit('flukso')
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end
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-- enable configured sensors
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for i = 1, MAX_SENSORS do
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if flukso[tostring(i)] ~= nil and flukso[tostring(i)].enable == '1' then
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cmd = string.format(SET_ENABLE, toc(i), 1)
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send(ctrl, cmd)
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end
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end
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-- commit changes
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send(ctrl, COMMIT)
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-- clean up
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ctrl.fdin:close()
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ctrl.fdout:close()
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print(arg[0] .. ' completed successfully. Bye!')
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