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[fluksod] set up a timerfd to poll the sensor board periodically

This commit is contained in:
Bart Van Der Meerssche 2011-01-24 14:40:52 +01:00
parent 3da4eee152
commit c754127df2
1 changed files with 17 additions and 2 deletions
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19
mote/v2/openwrt/package/flukso/luasrc/fluksod.lua
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@ -32,6 +32,12 @@ local SPI_MIN_BYTE_DELAY_US = 250
local SPI_TX_RX_DELAY_NS = 10e7
local POLL_TIMEOUT_MS = 100
local TIMERFD_ENABLE = 1
local TIMERFD_SEC = 1
local TIMERFD_NS = 0
local GET_DELTA = 'gd'
local DAEMON = os.getenv('DAEMON') or 'fluksod'
local DAEMON_PATH = os.getenv('DAEMON_PATH') or '/var/run/' .. DAEMON
@ -63,6 +69,10 @@ local uart = mkfifos('uart')
local ctrl = mkfifos('ctrl')
local delta = mkfifos('delta')
if TIMERFD_ENABLE == 1 then
delta.fd = nixio.timerfd(TIMERFD_SEC, TIMERFD_NS, TIMERFD_SEC, TIMERFD_NS)
end
local fds = { uart, ctrl, delta }
local spidev = nixio.open(SPI_DEV, O_RDWR_NONBLOCK)
@ -81,8 +91,13 @@ while true do
msg:parse()
elseif delta.revents == POLLIN then
-- TODO flush the delta fd after each POLLIN
msg = spi.new_msg('delta', delta.line())
if TIMERFD_ENABLE == 1 then
delta.fd:numexp() -- reset the numexp counter
else
delta.line()
end
msg = spi.new_msg('delta', GET_DELTA)
msg:parse()
elseif uart.revents == POLLIN then