Jeremy Penner
4d0beb0dbe
* refactor "jump" command into "eval" * Add debug server task to program * Allow compiling overlay programs that assume the existing program is already in memory * Add "forever" form to generate optimized infinite loops * Handle client changing its udp port
115 lines
3.9 KiB
Fennel
115 lines
3.9 KiB
Fennel
(local core (require :core))
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(local socket (require :socket))
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(local {: int16-to-bytes : int32-to-bytes : bytes-to-uint16 : bytes-to-uint32 : lo : in-coro} (require :lib.util))
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(local Ssc (require :ssc))
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(import-macros {:sss ! : compile} :ssc.macros)
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(local config {
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:host "172.24.1.6"
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:port 6502
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})
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{:cmd {
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:write 0
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:read 1
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:eval 2
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:pause 3
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:ping 4
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:read-dp 5
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}
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:response {
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:ack 0
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:data 1
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}
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:pending {}
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:msgid 0
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:waiting false
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:queue []
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:connect
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(fn [self ?port ?host]
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(when (not self.connection)
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(local [port host] [(or ?port config.port) (or ?host config.host)])
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(set self.connection (assert (socket.udp)))
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(assert (self.connection:setpeername host port))
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(self.connection:settimeout 0)
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(core.add_thread #(while (self:connected?) (self:receive) (coroutine.yield)) self.connection)))
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:connected? (fn [self] (not= self.connection nil))
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:disconnect
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(fn [self]
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(when self.connection
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(self.connection:close)
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(set self.connection nil)
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(set self.pending {})
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(set self.queue [])
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(set self.waiting false)))
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:next-msgid
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(fn [self]
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(set self.msgid (lo (+ self.msgid 1)))
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self.msgid)
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:send
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(fn [self cmd ?data ?callback]
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(self:enqueue
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#(let [msgid (self:next-msgid)
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msg (.. (string.char msgid cmd) (or ?data ""))]
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(print "sending" msgid cmd (length msg))
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(when ?callback
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(tset self.pending msgid ?callback)
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(set self.waiting true))
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(self.connection:send msg))))
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:receive
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(fn [self]
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(when self.connection
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(let [data (self.connection:receive)]
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(when data
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(let [msgid (string.byte (data:sub 1 1))
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cmd (string.byte (data:sub 2 2))
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pendingfn (. self.pending msgid)]
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(print "recieved" msgid cmd)
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(when pendingfn
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(tset self.pending msgid nil)
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(pendingfn self cmd (data:sub 3)))
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(set self.waiting false)))
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(when (and (not self.waiting) (> (length self.queue) 0))
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(let [f (. self.queue 1)]
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(table.remove self.queue 1)
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(f))))))
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:enqueue (fn [self f] (table.insert self.queue f))
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:eval (fn [self c {: parent : org : ignore-result}]
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(let [parent (or parent (require :ssc.iigs.u2-debug))
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ssc (Ssc {: parent})
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org (or org (parent.prg:lookup-addr :u2-debug-buffer))]
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(compile ssc
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(org [org])
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(fn do-the-thing () [c]))
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(ssc:assemble)
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(if (not ignore-result)
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(let [(_ data) (self:coro-send self.cmd.eval (. ssc.prg.org-to-block org :bytes))]
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{:word (bytes-to-uint16 data) :long (bytes-to-uint32 data 2)})
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(self:send self.cmd.eval (. ssc.prg.org-to-block org :bytes)))))
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:jump (fn [self addr] (self:eval (! (asm (jsl [(tostring addr)]))) {:ignore-result true}))
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:coro-send
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(fn [self cmd ?data]
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(let [coro (coroutine.running)]
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(self:send cmd ?data #(coroutine.resume coro $2 $3))
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(coroutine.yield)))
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:read
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(fn [self addr len]
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(if (> len 1450)
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(let [first (self:read addr 1450)
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rest (self:read (+ addr 1450) (- len 1450))]
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(.. first rest))
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(let [(cmd data) (self:coro-send self.cmd.read (.. (int32-to-bytes addr)
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(int16-to-bytes len)))] data)))
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:handle-ack (fn [self cmd] (assert (= cmd self.response.ack)))
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:write
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(fn [self addr data]
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(if (> (length data) 1450) (do (self:write addr (data:sub 1 1400)) (self:write (+ addr 1400) (data:sub 1401)))
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(self:send self.cmd.write (.. (int32-to-bytes addr)
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(int16-to-bytes (length data))
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data) self.handle-ack)))
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:pause (fn [self] (self:send self.cmd.write (int16-to-bytes 0xffff) self.handle-ack))
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:resume (fn [self] (self:send self.cmd.write (int16-to-bytes 0) self.handle-ack))
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:launch (fn [self prg] (self:jump (prg:lookup-addr prg.start-symbol)))
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}
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