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- -- ***************************************************************************
- -- Rotation Test
- --
- -- This script executes the rotation features of u8glib to test their Lua
- -- integration.
- --
- -- 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
- -- the draw() routine
- function draw()
- disp:setFont(u8g.font_6x10)
- disp:drawStr( 0+0, 20+0, "Hello!")
- disp:drawStr( 0+2, 20+16, "Hello!")
- disp:drawBox(0, 0, 3, 3)
- disp:drawBox(disp:getWidth()-6, 0, 6, 6)
- disp:drawBox(disp:getWidth()-9, disp:getHeight()-9, 9, 9)
- disp:drawBox(0, disp:getHeight()-12, 12, 12)
- end
- function rotate()
- if (next_rotation < tmr.now() / 1000) then
- if (dir == 0) then
- disp:undoRotation()
- elseif (dir == 1) then
- disp:setRot90()
- elseif (dir == 2) then
- disp:setRot180()
- elseif (dir == 3) then
- disp:setRot270()
- end
- dir = dir + 1
- dir = bit.band(dir, 3)
- -- schedule next rotation step in 1000ms
- next_rotation = tmr.now() / 1000 + 1000
- end
- end
- function rotation_test()
- print("--- Starting Rotation Test ---")
- dir = 0
- next_rotation = 0
- local loopcnt
- for loopcnt = 1, 100, 1 do
- rotate()
- disp:firstPage()
- repeat
- draw(draw_state)
- until disp:nextPage() == false
- tmr.delay(100000)
- tmr.wdclr()
- end
- print("--- Rotation Test done ---")
- end
- --init_i2c_display()
- init_spi_display()
- rotation_test()
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