DISP

This chapter will introduce you to the DISP features of LuatOS. Will achieve the use of Air101 development board driver oled display.

Introduction

DISP In fact, it encapsulates part of U8G2 API for display, so that everyone can use lua to drive quickly.oled

Hardware preparation

Air101 A development board, 0.96 inches OLED

Hardware connection diagram

(todo)

Software usage

Interface documentation can be referred to:disp library

Code Introduction

function display_str(str)
    disp.clear()
    disp.drawStr(str, 1, 18)
    disp.update()
end

local function ui_update()
    disp.clear() -- Clear screen
    disp.drawStr(os.date("%Y-%m-%d %H:%M:%S"), 1, 12) -- Write date
    disp.drawStr("Luat@Air101" .. " " .. _VERSION, 1, 24) -- Write version number
    disp.update()
end

-- Initialize display
log.info("disp", "init ssd1306") -- log library is a built-in library, none of the built-in libraries need require
disp.init({
    mode="i2c_sw",
    pin0=xx--[[Press your board to change your pin number.]],
    pin1=xx--[[Press your board to change your pin number.]],
}) -- Analog i2c,pin0 is SCL,pin1 is SDA, can also use hardware i2c pin
disp.setFont(1) -- Enable Chinese fonts, Wenquanyi dot matrix Song style 12x12
display_str("Starting ...")

sys.taskInit(function()
    while 1 do
        sys.wait(1000)
        log.info("disp", "ui update", rtos.meminfo()) -- rtos is also a built-in library
        ui_update()
    end
end)