Add examples for a few devices

init.lua

@@ -21,6 +21,7 @@ local components = {
 	"sillystuff",
 	"movestone",
 	"lclibraries",
+	"lcdocs",
 }
 
 if minetest.get_modpath("mesecons_luacontroller") then table.insert(components,"ioexpander") end

lc_examples/button.lua

@@ -0,0 +1,18 @@
+--Digilines Button Example
+
+--Connect a button on the channel "button" with any message.
+--When the button is pressed, pin A will toggle.
+--If manual light control is selected on the button, the button light will also be flashing.
+--If the button has a message set, it will be sent to an LCD on channel "lcd"
+
+if event.type == "program" then
+	mem.flash = false
+	interrupt(0,"flash")
+elseif event.iid == "flash" then
+	mem.flash = not mem.flash
+	digiline_send("button","light_"..(mem.flash and "on" or "off"))
+	interrupt(1,"flash",true)
+elseif event.channel == "button" then
+	port.a = not port.a
+	digiline_send("lcd",event.msg)
+end

lc_examples/ioexpander.lua

@@ -0,0 +1,14 @@
+--Digilines I/O Expander Example
+
+--Connect two I/O expanders, one on channel "expander1" and one on "expander2"
+--The pins on the second expander will follow the input states on the first one.
+--In addition, whenever an input on the first expander changes, a line will be logged to the terminal with the new state.
+
+local function iostr(pin)
+	return (pin and "1" or "0")
+end
+
+if event.channel == "expander1" then
+	digiline_send("expander2",event.msg)
+	print(string.format("A: %s B: %s C: %s D: %s",iostr(event.msg.a),iostr(event.msg.b),iostr(event.msg.c),iostr(event.msg.d)))
+end

lc_examples/light.lua

@@ -0,0 +1,24 @@
+--Digilines Dimmable Light Demo
+
+--Connect one or more lights on the channel "light"
+--Send pulses on:
+----Pin A to make the light brighter
+----Pin B to make the light dimmer
+----Pin C to set the light to full brightness
+----Pin D to turn the light off
+
+if event.type == "program" then
+	mem.light = 0
+elseif event.type == "on" then
+	if event.pin.name == "A" then
+		mem.light = math.min(14,mem.light+1)
+	elseif event.pin.name == "B" then
+		mem.light = math.max(0,mem.light-1)
+	elseif event.pin.name == "C" then
+		mem.light = 14
+	elseif event.pin.name == "D" then
+		mem.light = 0
+	end
+end
+
+digiline_send("light",mem.light)

lc_examples/memory.lua

@@ -0,0 +1,81 @@
+--Digilines Memory Example
+
+--Connect an EEPROM or SRAM chip on channel "memory"
+--Enter "help" in the terminal for a command list
+
+local function runcmd(command)
+	if command ~= "" then
+		print(" "..command,true)
+		print()
+	end
+	if string.sub(command,1,4) == "read" then
+		local address = string.sub(command,6,7)
+		if string.sub(address,2,2) == " " then address = string.sub(address,1,1) end
+		address = tonumber(address)
+		if (not address) or address > 31 or address < 0 or math.floor(address) ~= address then
+			print("Invalid address - address must be an integer from 0 to 31")
+		else
+			digiline_send(mem.channel,{command = "read",address = address})
+			mem.readsuccess = false
+			interrupt(1,"readtimeout")
+			return --Suppress printing a new prompt
+		end
+	elseif string.sub(command,1,5) == "write" then
+		local address = string.sub(command,7,8)
+		local data = string.sub(command,10,-1)
+		if string.sub(address,2,2) == " " then
+			address = string.sub(command,7,7)
+			data = string.sub(command,9,-1)
+		end
+		address = tonumber(address)
+		if (not address) or address > 31 or address <0 or math.floor(address) ~= address then
+			print("Invalid address - address must be an integer from 0 to 31")
+		elseif data == "" then
+			print("No data specified")
+		else
+			print(string.format("Wrote to address %d",address))
+			digiline_send(mem.channel,{command = "write",address = address,data = data})
+		end
+	elseif string.sub(command,1,7) == "channel" then
+		local channel = string.sub(command,9,-1)
+		if channel and channel ~= "" then
+			mem.channel = channel
+			print("Channel changed")
+		else
+			print("No channel specified")
+		end
+	elseif command == "clear" then
+		clearterm()
+		print(">")
+		return --Suppress printing a new prompt - it was done already to omit the blank line
+	elseif command == "help" then
+		print("Available commands:")
+		print("channel <channel>: Changes the digilines channel the memory device is attached to, default is \"memory\"")
+		print("clear: Clears the screen")
+		print("read <address>: Reads from the specified address and displays the received data")
+		print("write <address> <data>: Writes the specified data to the specified address")
+		print("help: Shows this help message")
+	elseif command == "" then
+		--Do nothing
+	else
+		print("Unknown command - use \"help\" to see a list of valid commands.")
+	end
+	print()
+	print(">")
+end
+
+if event.type == "program" then
+	mem.channel = "memory"
+	runcmd("clear")
+elseif event.iid == "readtimeout" and not mem.readsuccess then
+	print("No response received. Is there a memory device connected on the channel \""..mem.channel.."\"?")
+	print()
+	print(">")
+elseif event.channel == mem.channel then
+	mem.readsuccess = true
+	print(event.msg)
+	print()
+	print(">")
+elseif event.type == "terminal" then
+	runcmd(event.text)
+end

lc_examples/piston.lua

@@ -0,0 +1,19 @@
+--Digilines Piston Example
+
+--Connect the piston on the channel "piston"
+--Pulse pin A to extend the piston
+--Pulse pin B to retract the piston
+--Pulse pin C to retract the piston, pulling one node back
+--Pulse pin D to silently retract the piston, pulling up to 5 nodes back
+
+if event.type == "on" then
+	if event.pin.name == "A" then
+		digiline_send("piston","extend")
+	elseif event.pin.name == "B" then
+		digiline_send("piston","retract")
+	elseif event.pin.name == "C" then
+		digiline_send("piston","retract_sticky")
+	elseif event.pin.name == "D" then
+		digiline_send("piston",{action = "retract",allsticky = true,max = 5,sound = "none"})
+	end
+end

lcdocs.lua

@@ -0,0 +1,15 @@
+if (not minetest.global_exists("mesecon")) or type(mesecon.lc_docs) ~= "table" then return end
+
+local examples = {
+	["Digilines Piston"] = "piston.lua",
+	["Digilines Button"] = "button.lua",
+	["Digilines I/O Expander"] = "ioexpander.lua",
+	["Digilines EEPROM/SRAM"] = "memory.lua",
+	["Digilines Dimmable Light"] = "light.lua",
+}
+
+for k,v in pairs(examples) do
+	local f = io.open(minetest.get_modpath("digistuff")..DIR_DELIM.."lc_examples"..DIR_DELIM..v,"r")
+	mesecon.lc_docs.examples[k] = f:read("*all")
+	f:close()
+end

mod.conf

@@ -2,4 +2,4 @@ name = digistuff
 title = digistuff
 description = Random digilines devices for Minetest
 depends = digilines
-optional_depends = default,mesecons,mesecons_mvps,screwdriver,pipeworks
+optional_depends = default,mesecons,mesecons_mvps,screwdriver,pipeworks,mesecons_luacontroller