threaded RTU/PLC bugfixes

rtu/startup.lua

@@ -19,7 +19,7 @@ os.loadAPI("dev/boiler_rtu.lua")
 os.loadAPI("dev/imatrix_rtu.lua")
 os.loadAPI("dev/turbine_rtu.lua")
 
-local RTU_VERSION = "alpha-v0.4.0"
+local RTU_VERSION = "alpha-v0.4.1"
 
 local print = util.print
 local println = util.println
@@ -58,11 +58,12 @@ local __shared_memory = {
 
     -- message queues
     q = {
-        mq_comms = mqeueu.new()
+        mq_comms = mqueue.new()
     }
 }
 
 local smem_dev = __shared_memory.rtu_dev
+local smem_sys = __shared_memory.rtu_sys
 
 -- get modem
 if smem_dev.modem == nil then
@@ -71,7 +72,7 @@ if smem_dev.modem == nil then
     return
 end
 
-local rtu_comms = rtu.rtu_comms(modem, config.LISTEN_PORT, config.SERVER_PORT)
+smem_sys.rtu_comms = rtu.rtu_comms(smem_dev.modem, config.LISTEN_PORT, config.SERVER_PORT)
 
 ----------------------------------------
 -- interpret config and init units

rtu/threads.lua

@@ -15,6 +15,8 @@ local COMMS_CLOCK = 0.25 -- (4Hz, 5 ticks)
 function thread__main(smem)
     -- execute thread
     local exec = function ()
+        log._debug("main thread start")
+
         -- advertisement/heartbeat clock
         local loop_clock = os.startTimer(MAIN_CLOCK)
 
@@ -22,6 +24,7 @@ function thread__main(smem)
         local rtu_state = smem.rtu_state
         local rtu_dev   = smem.rtu_dev
         local rtu_comms = smem.rtu_sys.rtu_comms
+        local units     = smem.rtu_sys.units
 
         -- event loop
         while true do
@@ -102,6 +105,8 @@ end
 function thread__comms(smem)
     -- execute thread
     local exec = function ()
+        log._debug("comms thread start")
+
         -- load in from shared memory
         local rtu_state   = smem.rtu_state
         local rtu_comms   = smem.rtu_sys.rtu_comms
@@ -127,7 +132,7 @@ function thread__comms(smem)
                     rtu_comms.handle_packet(msg.message, units, rtu_state) 
                 end
 
-                -- quick yield
+                -- quick yield if we are looping right back
                 if comms_queue.ready() then util.nop() end
             end
 
@@ -139,9 +144,14 @@ function thread__comms(smem)
 
             -- delay before next check
             local sleep_for = COMMS_CLOCK - (util.time() - last_update)
-            if sleep_for > 0.05 then
+            last_update = util.time()
+            if sleep_for > 0 then
                 sleep(sleep_for)
+            else
+                sleep(0.05)
             end
         end
     end
+
+    return { exec = exec }
 end