82 lines
2.0 KiB
Lua
82 lines
2.0 KiB
Lua
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-- setup I2c and connect display
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function init_i2c_display()
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-- SDA and SCL can be assigned freely to available GPIOs
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sda = 5 -- GPIO14
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scl = 6 -- GPIO12
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sla = 0x3c
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i2c.setup(0, sda, scl, i2c.SLOW)
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disp = u8g.ssd1306_128x64_i2c(sla)
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end
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-- setup SPI and connect display
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function init_spi_display()
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-- Hardware SPI CLK = GPIO14
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-- Hardware SPI MOSI = GPIO13
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-- Hardware SPI MISO = GPIO12 (not used)
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-- CS and D/C can be assigned freely to available GPIOs
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cs = 8 -- GPIO15, pull-down 10k to GND
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dc = 4 -- GPIO2
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spi.setup(1, spi.MASTER, spi.CPOL_LOW, spi.CPHA_LOW, spi.DATABITS_8, 0)
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disp = u8g.ssd1306_128x64_spi(cs, dc)
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end
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-- the draw() routine
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function draw()
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disp:setFont(u8g.font_6x10)
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disp:drawStr( 0+0, 20+0, "Hello!")
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disp:drawStr( 0+2, 20+16, "Hello!")
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disp:drawBox(0, 0, 3, 3)
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disp:drawBox(disp:getWidth()-6, 0, 6, 6)
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disp:drawBox(disp:getWidth()-9, disp:getHeight()-9, 9, 9)
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disp:drawBox(0, disp:getHeight()-12, 12, 12)
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end
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function rotate()
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if (next_rotation < tmr.now() / 1000) then
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if (dir == 0) then
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disp:undoRotation()
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elseif (dir == 1) then
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disp:setRot90()
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elseif (dir == 2) then
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disp:setRot180()
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elseif (dir == 3) then
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disp:setRot270()
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end
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dir = dir + 1
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dir = bit.band(dir, 3)
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-- schedule next rotation step in 1000ms
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next_rotation = tmr.now() / 1000 + 1000
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end
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end
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function rotation_test()
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print("--- Starting Rotation Test ---")
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dir = 0
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next_rotation = 0
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local loopcnt
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for loopcnt = 1, 100, 1 do
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rotate()
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disp:firstPage()
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repeat
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draw(draw_state)
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until disp:nextPage() == false
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tmr.delay(100000)
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tmr.wdclr()
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end
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print("--- Rotation Test done ---")
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end
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--init_i2c_display()
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init_spi_display()
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rotation_test()
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