82 lines
1.7 KiB
Lua
82 lines
1.7 KiB
Lua
---
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--- GPIO
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---
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JZ.gpio = {}
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function JZ.gpio.pinmask(bank, mask)
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local t = {}
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t.read = function()
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return bit32.band(HW.GPIO.IN[bank].read(), mask)
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end
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t.write = function(val)
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if val then t.set() else t.clr() end
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end
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t.set = function()
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HW.GPIO.OUT[bank].SET.write(mask)
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end
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t.clr = function()
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HW.GPIO.OUT[bank].CLR.write(mask)
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end
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t.gpio = function()
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HW.GPIO.FUNCTION[bank].CLR.write(mask)
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HW.GPIO.SELECT[bank].CLR.write(mask)
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end
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t.dir = function(out)
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if out then
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HW.GPIO.DIR[bank].SET.write(mask)
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else
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HW.GPIO.DIR[bank].CLR.write(mask)
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end
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end
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t.pull = function(val)
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if val then
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HW.GPIO.PULL[bank].CLR.write(mask)
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else
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HW.GPIO.PULL[bank].SET.write(mask)
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end
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end
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t.std_gpio_out = function(data)
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t.gpio()
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t.dir(true)
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t.pull(false)
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t.write(data)
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end
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t.gpio_in = function(data)
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t.gpio()
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t.dir(false)
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end
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t.std_function = function(fun_nr)
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HW.GPIO.FUNCTION[bank].SET.write(mask)
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if fun_nr >= 2 then
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HW.GPIO.TRIGGER[bank].SET.write(mask)
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fun_nr = fun_nr - 2
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else
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HW.GPIO.TRIGGER[bank].CLR.write(mask)
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end
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if fun_nr >= 2 then
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HW.GPIO.SELECT[bank].SET.write(mask)
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else
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HW.GPIO.SELECT[bank].CLR.write(mask)
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end
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end
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return t
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end
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function JZ.gpio.pin(bank,pin)
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local mask = bit32.lshift(1, pin)
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local t = JZ.gpio.pinmask(bank,mask)
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t.read = function()
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return bit32.extract(HW.GPIO.IN[bank].read(), pin)
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end
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return t
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end
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