162 lines
4.2 KiB
Lua
162 lines
4.2 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, D/C, and RES 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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res = 0 -- GPIO16
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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, res)
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end
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-- graphic test components
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function prepare()
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disp:setFont(u8g.font_6x10)
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disp:setFontRefHeightExtendedText()
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disp:setDefaultForegroundColor()
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disp:setFontPosTop()
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end
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function box_frame(a)
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disp:drawStr(0, 0, "drawBox")
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disp:drawBox(5, 10, 20, 10)
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disp:drawBox(10+a, 15, 30, 7)
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disp:drawStr(0, 30, "drawFrame")
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disp:drawFrame(5, 10+30, 20, 10)
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disp:drawFrame(10+a, 15+30, 30, 7)
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end
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function disc_circle(a)
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disp:drawStr(0, 0, "drawDisc")
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disp:drawDisc(10, 18, 9)
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disp:drawDisc(24+a, 16, 7)
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disp:drawStr(0, 30, "drawCircle")
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disp:drawCircle(10, 18+30, 9)
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disp:drawCircle(24+a, 16+30, 7)
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end
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function r_frame(a)
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disp:drawStr(0, 0, "drawRFrame/Box")
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disp:drawRFrame(5, 10, 40, 30, a+1)
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disp:drawRBox(50, 10, 25, 40, a+1)
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end
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function stringtest(a)
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disp:drawStr(30+a, 31, " 0")
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disp:drawStr90(30, 31+a, " 90")
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disp:drawStr180(30-a, 31, " 180")
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disp:drawStr270(30, 31-a, " 270")
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end
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function line(a)
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disp:drawStr(0, 0, "drawLine")
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disp:drawLine(7+a, 10, 40, 55)
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disp:drawLine(7+a*2, 10, 60, 55)
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disp:drawLine(7+a*3, 10, 80, 55)
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disp:drawLine(7+a*4, 10, 100, 55)
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end
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function triangle(a)
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local offset = a
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disp:drawStr(0, 0, "drawTriangle")
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disp:drawTriangle(14,7, 45,30, 10,40)
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disp:drawTriangle(14+offset,7-offset, 45+offset,30-offset, 57+offset,10-offset)
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disp:drawTriangle(57+offset*2,10, 45+offset*2,30, 86+offset*2,53)
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disp:drawTriangle(10+offset,40+offset, 45+offset,30+offset, 86+offset,53+offset)
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end
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function ascii_1()
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local x, y, s
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disp:drawStr(0, 0, "ASCII page 1")
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for y = 0, 5, 1 do
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for x = 0, 15, 1 do
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s = y*16 + x + 32
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disp:drawStr(x*7, y*10+10, string.char(s))
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end
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end
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end
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function ascii_2()
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local x, y, s
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disp:drawStr(0, 0, "ASCII page 2")
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for y = 0, 5, 1 do
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for x = 0, 15, 1 do
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s = y*16 + x + 160
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disp:drawStr(x*7, y*10+10, string.char(s))
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end
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end
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end
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function extra_page(a)
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disp:drawStr(0, 12, "setScale2x2")
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disp:setScale2x2()
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disp:drawStr(0, 6+a, "setScale2x2")
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disp:undoScale()
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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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prepare()
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if (component == 0) then
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box_frame(bit.band(draw_state, 7))
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elseif (component == 1) then
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disc_circle(bit.band(draw_state, 7))
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elseif (component == 2) then
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r_frame(bit.band(draw_state, 7))
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elseif (component == 3) then
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stringtest(bit.band(draw_state, 7))
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elseif (component == 4) then
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line(bit.band(draw_state, 7))
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elseif (component == 5) then
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triangle(bit.band(draw_state, 7))
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elseif (component == 6) then
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ascii_1()
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elseif (component == 7) then
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ascii_2()
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elseif (component == 8) then
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extra_page(bit.band(draw_state, 7))
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end
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end
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function graphics_test(delay)
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print("--- Starting Graphics Test ---")
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-- cycle through all components
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local draw_state
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for draw_state = 0, 7 + 8*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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--print(node.heap())
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tmr.delay(delay)
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-- re-trigger Watchdog!
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tmr.wdclr()
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end
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print("--- Graphics 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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graphics_test(50000)
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