-- *************************************************************************** -- Graphics Test -- -- This script executes several features of u8glib to test their Lua bindings. -- -- Note: It is prepared for SSD1306-based displays. Select your connectivity -- type by calling either init_i2c_display() or init_spi_display() at -- the bottom of this file. -- -- *************************************************************************** -- setup I2c and connect display function init_i2c_display() -- SDA and SCL can be assigned freely to available GPIOs local sda = 5 -- GPIO14 local scl = 6 -- GPIO12 local sla = 0x3c i2c.setup(0, sda, scl, i2c.SLOW) disp = u8g.ssd1306_128x64_i2c(sla) end -- setup SPI and connect display function init_spi_display() -- Hardware SPI CLK = GPIO14 -- Hardware SPI MOSI = GPIO13 -- Hardware SPI MISO = GPIO12 (not used) -- Hardware SPI /CS = GPIO15 (not used) -- CS, D/C, and RES can be assigned freely to available GPIOs local cs = 8 -- GPIO15, pull-down 10k to GND local dc = 4 -- GPIO2 local res = 0 -- GPIO16 spi.setup(1, spi.MASTER, spi.CPOL_LOW, spi.CPHA_LOW, 8, 8) -- we won't be using the HSPI /CS line, so disable it again gpio.mode(8, gpio.INPUT, gpio.PULLUP) disp = u8g.ssd1306_128x64_hw_spi(cs, dc, res) end -- graphic test components function prepare() disp:setFont(u8g.font_6x10) disp:setFontRefHeightExtendedText() disp:setDefaultForegroundColor() disp:setFontPosTop() end function box_frame(a) disp:drawStr(0, 0, "drawBox") disp:drawBox(5, 10, 20, 10) disp:drawBox(10+a, 15, 30, 7) disp:drawStr(0, 30, "drawFrame") disp:drawFrame(5, 10+30, 20, 10) disp:drawFrame(10+a, 15+30, 30, 7) end function disc_circle(a) disp:drawStr(0, 0, "drawDisc") disp:drawDisc(10, 18, 9) disp:drawDisc(24+a, 16, 7) disp:drawStr(0, 30, "drawCircle") disp:drawCircle(10, 18+30, 9) disp:drawCircle(24+a, 16+30, 7) end function r_frame(a) disp:drawStr(0, 0, "drawRFrame/Box") disp:drawRFrame(5, 10, 40, 30, a+1) disp:drawRBox(50, 10, 25, 40, a+1) end function stringtest(a) disp:drawStr(30+a, 31, " 0") disp:drawStr90(30, 31+a, " 90") disp:drawStr180(30-a, 31, " 180") disp:drawStr270(30, 31-a, " 270") end function line(a) disp:drawStr(0, 0, "drawLine") disp:drawLine(7+a, 10, 40, 55) disp:drawLine(7+a*2, 10, 60, 55) disp:drawLine(7+a*3, 10, 80, 55) disp:drawLine(7+a*4, 10, 100, 55) end function triangle(a) local offset = a disp:drawStr(0, 0, "drawTriangle") disp:drawTriangle(14,7, 45,30, 10,40) disp:drawTriangle(14+offset,7-offset, 45+offset,30-offset, 57+offset,10-offset) disp:drawTriangle(57+offset*2,10, 45+offset*2,30, 86+offset*2,53) disp:drawTriangle(10+offset,40+offset, 45+offset,30+offset, 86+offset,53+offset) end function ascii_1() local x, y, s disp:drawStr(0, 0, "ASCII page 1") for y = 0, 5, 1 do for x = 0, 15, 1 do s = y*16 + x + 32 disp:drawStr(x*7, y*10+10, string.char(s)) end end end function extra_page(a) disp:drawStr(0, 12, "setScale2x2") disp:setScale2x2() disp:drawStr(0, 6+a, "setScale2x2") disp:undoScale() end -- the draw() routine function draw(draw_state) local component = bit.rshift(draw_state, 3) prepare() if (component == 0) then box_frame(bit.band(draw_state, 7)) elseif (component == 1) then disc_circle(bit.band(draw_state, 7)) elseif (component == 2) then r_frame(bit.band(draw_state, 7)) elseif (component == 3) then stringtest(bit.band(draw_state, 7)) elseif (component == 4) then line(bit.band(draw_state, 7)) elseif (component == 5) then triangle(bit.band(draw_state, 7)) elseif (component == 6) then ascii_1() elseif (component == 7) then extra_page(bit.band(draw_state, 7)) end end function draw_loop() -- Draws one page and schedules the next page, if there is one local function draw_pages() draw(draw_state) if disp:nextPage() then node.task.post(draw_pages) else node.task.post(graphics_test) end end -- Restart the draw loop and start drawing pages disp:firstPage() node.task.post(draw_pages) end function graphics_test() if (draw_state <= 7 + 8*8) then draw_state = draw_state + 1 else print("--- Restarting Graphics Test ---") draw_state = 0 end print("Heap: " .. node.heap()) -- retrigger draw_loop node.task.post(draw_loop) end draw_state = 0 init_i2c_display() --init_spi_display() print("--- Starting Graphics Test ---") node.task.post(draw_loop)