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Pong example remorphed for a require() / module () scheme.

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It now illustrates how to create and use a module in Lua for eLua.
An LM3S platform-dependend module is created, exposing it's buttons, leds and offering some utility functions.
This commit is contained in:
Dado Sutter 2008-12-08 19:39:47 +00:00
parent a20cfa3563
commit 6ac505a181
2 changed files with 29 additions and 28 deletions
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20
romfs/LM3S.lua Normal file
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@ -0,0 +1,20 @@
local pio = pio
module(...)
BTN_UP = pio.PE_0
BTN_DOWN = pio.PE_1
BTN_LEFT = pio.PE_2
BTN_RIGHT = pio.PE_3
BTN_SELECT = pio.PF_1
btnpressed = function( button )
return ( pio.get ( button ) == 0 )
end
LED_1 = pio.PF_0
pio.input( BTN_UP, BTN_DOWN, BTN_LEFT, BTN_RIGHT, BTN_SELECT )
pio.pullup( BTN_UP, BTN_DOWN, BTN_LEFT, BTN_RIGHT, BTN_SELECT )
pio.output ( LED_1 )

37
romfs/pong.lua
View File

@ -3,25 +3,7 @@
Function lm3s_init will become a separate module, require()d here
--]]
function lm3s_init()
btn = {}
btn.UP = pio.PE_0
btn.DOWN = pio.PE_1
btn.LEFT = pio.PE_2
btn.RIGHT = pio.PE_3
btn.SELECT = pio.PF_1
btn.LED1 = pio.PF_0
pio.input( btn.UP, btn.DOWN, btn.LEFT, btn.RIGHT, btn.SELECT )
pio.pullup( btn.UP, btn.DOWN, btn.LEFT, btn.RIGHT, btn.SELECT )
pio.output ( btn.LED1 )
btn.pressed = function( btn )
return ( pio.get ( btn ) == 0 )
end
end
function term.keypressed()
return( uart.recv (0, 0, 0) >= 0 )
end
require("LM3S")
function drawPaddle( y, color )
disp.stringdraw("|", 0, y, color)
@ -43,13 +25,13 @@ function updateBallPos()
end
function updatePaddlePos()
if btn.pressed( btn.UP ) then
if LM3S.btnpressed( LM3S.BTN_UP ) then
if ( py > 0 ) then
drawPaddle( py, 0 )
py = py - 1
drawPaddle( py, 11 )
end
elseif btn.pressed( btn.DOWN ) then
elseif LM3S.btnpressed( LM3S.BTN_DOWN ) then
if ( py < 80 ) then
drawPaddle( py, 0 )
py = py + 1
@ -61,12 +43,11 @@ function updatePaddlePos()
end
------------ MAIN ------------
lm3s_init()
disp.init(1000000)
term.clrscr()
--term.gotoxy( 5, 1 )
--print( "Welcome to eLua Tenis on a RIT display" )
term.gotoxy( 5, 1 )
print( "Welcome to eLua Pong on a RIT display" )
disp.stringdraw( "eLua Pong", 30, 40, 11 )
tmr.delay ( 0, 2000000 )
@ -104,14 +85,14 @@ while (true) do
end
if change == 0 then
if btn.pressed( btn.RIGHT ) and time > 0 then
if LM3S.btnpressed( LM3S.BTN_RIGHT ) and time > 0 then
change = 1
elseif btn.pressed( btn.LEFT ) and dscore > 1 then
elseif LM3S.btnpressed( LM3S.BTN_LEFT ) and dscore > 1 then
change = -1
end
end
if ( btn.pressed( btn.RIGHT ) ) == false and ( btn.pressed( btn.LEFT ) ) == false then
if ( LM3S.btnpressed( LM3S.BTN_RIGHT ) ) == false and ( LM3S.btnpressed( LM3S.BTN_LEFT ) ) == false then
if change == 1 then
time = time - 2000
dscore = dscore + 1
@ -136,7 +117,7 @@ while (true) do
disp.stringdraw( "High score: " .. tostring( highscore ), 15, 50, 11 )
disp.stringdraw( "SELECT to restart", 6, 70, 11 )
for i=0, 500000 do
if btn.pressed( btn.SELECT ) then
if LM3S.btnpressed( LM3S.BTN_SELECT ) then
play = true
break
end