rockbox/utils/hwstub/tools/lua/jz/gpio.lua

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