84 lines
1.9 KiB
Lua
84 lines
1.9 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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function xbm_picture()
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disp:setFont(u8g.font_6x10)
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disp:drawStr( 0, 10, "XBM picture")
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disp:drawXBM( 0, 20, 38, 24, xbm_data )
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end
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function bitmap_picture(state)
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disp:setFont(u8g.font_6x10)
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disp:drawStr( 0, 10, "Bitmap picture")
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disp:drawBitmap( 0 + (state * 10), 20 + (state * 4), 1, 8, bm_data )
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end
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-- the draw() routine
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function draw(draw_state)
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local component = bit.rshift(draw_state, 3)
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if (component == 0) then
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xbm_picture(bit.band(draw_state, 7))
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elseif (component == 1) then
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bitmap_picture(bit.band(draw_state, 7))
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end
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end
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function bitmap_test(delay)
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-- read XBM picture
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file.open("u8glib_logo.xbm", "r")
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xbm_data = file.read()
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file.close()
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-- read Bitmap picture
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file.open("u8g_rook.bm", "r")
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bm_data = file.read()
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file.close()
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print("--- Starting Bitmap Test ---")
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dir = 0
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next_rotation = 0
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local draw_state
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for draw_state = 1, 7 + 1*8, 1 do
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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(delay)
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tmr.wdclr()
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end
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print("--- Bitmap 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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bitmap_test(50000)
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