84 lines
2.3 KiB
Lua
84 lines
2.3 KiB
Lua
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-- Run LiquidCrystal through some basic tests. Requires `liquidcrystal.lua`
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-- and `l2-i2c4bit.lua` available available to `require`.
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--
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-- This file ought to be named "NTest_liquidcrystal_i2c4bit" or something,
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-- but it has its current name due to our default SPIFFS filename length limit.
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local N = ...
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N = (N or require "NTest")("liquidcrystal-i2c4bit")
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local metalcd
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local metaback
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local backend
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local lcd
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collectgarbage()
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print("HEAP init", node.heap())
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metalcd = require "liquidcrystal"
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collectgarbage() print("HEAP constructor imported ", node.heap())
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metaback = require "lc-i2c4bit"
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collectgarbage() print("HEAP backend imported ", node.heap())
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backend = metaback({
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address = 0x27,
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id = 0,
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speed = i2c.SLOW,
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sda = 2,
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scl = 1,
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})
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collectgarbage() print("HEAP backend built", node.heap())
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lcd = metalcd(backend, false, true, 20)
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collectgarbage() print("HEAP lcd built", node.heap())
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print("waiting for LCD to be unbusy before testing...")
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while lcd:busy() do end
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N.test("custom character", function()
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local glyph = { 0x1F, 0x15, 0x1B, 0x15, 0x1F, 0x10, 0x10, 0x0 }
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lcd:customChar(0, glyph)
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ok(eq(glyph,lcd:readCustom(0)), "read back")
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end)
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N.test("draw and readback", function()
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lcd:cursorMove(0)
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lcd:write("abc")
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lcd:cursorMove(10,1)
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lcd:write("de")
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lcd:cursorMove(10,2)
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lcd:write("fg")
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lcd:cursorMove(12,3)
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lcd:write("hi\000")
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lcd:cursorMove(18,4)
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lcd:write("jk")
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lcd:home() ok(eq(0x61, lcd:read()), "read back 'a'")
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ok(eq(0x62, lcd:read()), "read back 'b'")
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lcd:cursorMove(11,1) ok(eq(0x65, lcd:read()), "read back 'e'")
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lcd:cursorMove(11,2) ok(eq(0x67, lcd:read()), "read back 'g'")
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lcd:cursorMove(13,3) ok(eq(0x69, lcd:read()), "read back 'i'")
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lcd:cursorMove(14,3) ok(eq(0x00, lcd:read()), "read back 0" )
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lcd:cursorMove(19,4) ok(eq(0x6B, lcd:read()), "read back 'k'")
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end)
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N.test("update home", function()
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lcd:home() lcd:write("l")
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lcd:home() ok(eq(0x6C, lcd:read()))
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end)
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N.testasync("clear", function(next)
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-- clear and poll busy
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lcd:clear()
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tmr.create():alarm(5, tmr.ALARM_SEMI, function(tp)
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if lcd:busy() then tp:start() else next() end
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end)
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lcd:home() -- work around busy polling incrementing position (XXX)
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ok(eq(0x20, lcd:read()), "is space")
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ok(eq(1, lcd:position())) -- having just read 1 from home, we should be at 1
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end)
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