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- -- ***************************************************************************
- -- 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)
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