65 lines
1.6 KiB
Lua
65 lines
1.6 KiB
Lua
---
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--- GPIO
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---
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PP.gpio = {}
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local h = HELP:get_topic("PP"):create_topic("gpio")
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h:add("TODO")
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local hh = h:create_topic("pin")
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hh:add("TODO")
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function PP.gpio.pin(bank,pin)
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if type(bank) == "string" then
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if string.len(bank) ~= 1 then
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error("Invalid bank " .. bank)
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end
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bank = string.byte(bank)
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if bank < string.byte("A") or bank > string.byte("Z") then
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error("Invalid bank " .. bank)
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end
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bank = bank - string.byte("A")
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end
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if pin < 0 or pin >= 8 then
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error("invalid pin " .. pin)
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end
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PP.debug(string.format("gpio: get pin B%dP%d", bank, pin))
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local t = {
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read = function()
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return bit32.extract(HW.GPIO.INPUT_VALn[bank].read(), pin)
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end,
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write = function(val)
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local v = HW.GPIO.OUTPUT_VALn[bank].read()
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v = bit32.replace(v, val and 1 or 0, pin)
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HW.GPIO.OUTPUT_VALn[bank].write(v)
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end,
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enable = function(val)
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if val == nil then
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val = false
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end
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local v = HW.GPIO.ENABLEn[bank].read()
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v = bit32.replace(v, val and 1 or 0, pin)
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HW.GPIO.ENABLEn[bank].write(v)
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end,
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output_enable = function(val)
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if val == nil then
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val = false
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end
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local v = HW.GPIO.OUTPUT_ENn[bank].read()
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v = bit32.replace(v, val and 1 or 0, pin)
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HW.GPIO.OUTPUT_ENn[bank].write(v)
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end,
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muxsel = function(x)
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end,
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pull = function(val)
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end,
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}
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return t
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end
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