forked from len0rd/rockbox
65 lines
1.6 KiB
Lua
65 lines
1.6 KiB
Lua
---
|
|
--- GPIO
|
|
---
|
|
PP.gpio = {}
|
|
|
|
local h = HELP:get_topic("PP"):create_topic("gpio")
|
|
h:add("TODO")
|
|
|
|
local hh = h:create_topic("pin")
|
|
hh:add("TODO")
|
|
|
|
function PP.gpio.pin(bank,pin)
|
|
if type(bank) == "string" then
|
|
if string.len(bank) ~= 1 then
|
|
error("Invalid bank " .. bank)
|
|
end
|
|
bank = string.byte(bank)
|
|
if bank < string.byte("A") or bank > string.byte("Z") then
|
|
error("Invalid bank " .. bank)
|
|
end
|
|
bank = bank - string.byte("A")
|
|
end
|
|
if pin < 0 or pin >= 8 then
|
|
error("invalid pin " .. pin)
|
|
end
|
|
PP.debug(string.format("gpio: get pin B%dP%d", bank, pin))
|
|
local t = {
|
|
read = function()
|
|
return bit32.extract(HW.GPIO.INPUT_VALn[bank].read(), pin)
|
|
end,
|
|
|
|
write = function(val)
|
|
local v = HW.GPIO.OUTPUT_VALn[bank].read()
|
|
v = bit32.replace(v, val and 1 or 0, pin)
|
|
HW.GPIO.OUTPUT_VALn[bank].write(v)
|
|
end,
|
|
|
|
enable = function(val)
|
|
if val == nil then
|
|
val = false
|
|
end
|
|
local v = HW.GPIO.ENABLEn[bank].read()
|
|
v = bit32.replace(v, val and 1 or 0, pin)
|
|
HW.GPIO.ENABLEn[bank].write(v)
|
|
end,
|
|
|
|
output_enable = function(val)
|
|
if val == nil then
|
|
val = false
|
|
end
|
|
local v = HW.GPIO.OUTPUT_ENn[bank].read()
|
|
v = bit32.replace(v, val and 1 or 0, pin)
|
|
HW.GPIO.OUTPUT_ENn[bank].write(v)
|
|
end,
|
|
|
|
muxsel = function(x)
|
|
|
|
end,
|
|
|
|
pull = function(val)
|
|
|
|
end,
|
|
}
|
|
return t
|
|
end
|