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|
---
--- PINCTRL
---
STMP.pinctrl = {}
local h = HELP:get_topic("STMP"):create_topic("pinctrl")
h:add("The STMP.pinctrl table handles the pinctrl device for all STMPs.")
h:add("It provides a simple abstraction to set individual pins.")
local hh = h:create_topic("pin")
hh:add("The STMP.pinctrl.pin(x,yy) function returns a table for the pin BxPyy.")
hh:add("Depending on the STMP family, the following function might be available.")
hh:add("* read() returns the value of the pin (the pin does not need to be configured as GPIO)")
hh:add("* write(x) sets the value of the pin (provided it is a GPIO with output enabled)")
hh:add("* set() is equivalent to write(1)")
hh:add("* clr() is equivalent to write(0)")
hh:add("* enable() enables the gpio output (provided it is configured as GPIO).")
hh:add("* disable() disables the gpio output (provided it is configured as GPIO)")
hh:add("* muxsel(x) set pin function to x, which can be an integer or one of: MAIN, ALT1, ALT2, GPIO")
function STMP.pinctrl.pin(bank,pin)
local t = {
read = function()
return bit32.extract(HW.PINCTRL.DINn[bank].read(), pin)
end,
write = function(val)
if val then t.set() else t.clr() end
end,
set = function()
HW.PINCTRL.DOUTn[bank].set(bit32.lshift(1, pin))
end,
clr = function()
HW.PINCTRL.DOUTn[bank].clr(bit32.lshift(1, pin))
end,
enable = function()
HW.PINCTRL.DOEn[bank].set(bit32.lshift(1, pin))
end,
disable = function()
HW.PINCTRL.DOEn[bank].clr(bit32.lshift(1, pin))
end,
muxsel = function(x)
if type(x) == "string" then
if x == "MAIN" then x = 0
elseif x == "ALT1" then x = 1
elseif x == "ALT2" then x = 2
elseif x == "GPIO" then x = 3
else error("Invalid muxsel string " .. x) end
end
local v = nil
if STMP.is_stmp3600() then
if pin < 16 then
v = HW.PINCTRL.MUXSELLn[bank]
else
v = HW.PINCTRL.MUXSELHn[bank]
end
else
v = HW.PINCTRL.MUXSELn[2 * bank + math.floor(pin / 16)]
end
v.write(bit32.replace(v.read(), x, (pin % 16) * 2, 2))
end,
pull = function(val)
if val then
HW.PINCTRL.PULLn[bank].set(bit32.lshift(1, pin))
else
HW.PINCTRL.PULLn[bank].clr(bit32.lshift(1, pin))
end
end,
}
return t
end
hh = h:create_topic("configure")
hh:add("The STMP.pinctrl.configure(tbl) function configures pins according to a table.")
hh:add("The table must contain a list of subtable, each corresponding to a pin.")
hh:add("Each subtable can configure one or more aspects of a specific pin.")
hh:add("The following characteristics are understood:")
hh:add("* bank: pin bank (mandatory)")
hh:add("* pin: pin number (mandatory) ")
hh:add("* muxsel: same values as STMP.pinctrl.pin().muxsel (optional)")
hh:add("* enable: enable/disable output (optional)")
hh:add("* output: set/clear output (optional)")
hh:add("* pull: enable/disable pullup (optional)")
hh:add("All non-subtable entries are ignored")
hh:add("All unknown parameters in subtablkes are ignored")
hh:add("")
hh:add("Example:")
hh:add("STMP.pinctrl.configure({{bank=0,pin=1,muxsel=\"GPIO\",enable=false},{bank=0,pin=2,muxsel=\"MAIN\"}})")
function STMP.pinctrl.configure(tbl)
if type(tbl) ~= "table" then error("Parameter must be a table") end
for i,v in pairs(tbl) do
if type(v) == "table" then
if v.bank ~= nil and v.pin ~= nil then
local pin = STMP.pinctrl.pin(v.bank,v.pin)
if v.muxsel ~= nil then
STMP.debug(string.format("cfg B%dP%02d muxsel %s", v.bank, v.pin, v.muxsel))
pin.muxsel(v.muxsel)
end
if v.enable ~= nil then
STMP.debug(string.format("cfg B%dP%02d enable %s", v.bank, v.pin, v.enable))
if v.enable then pin.enable()
else pin.disable() end
end
if v.output ~= nil then
STMP.debug(string.format("cfg B%dP%02d output %s", v.bank, v.pin, v.output))
if v.output then pin.set()
else pin.clr() end
end
if v.pull ~= nil then
STMP.debug(string.format("cfg B%dP%02d pull %s", v.bank, v.pin, v.pull))
pin.pull(v.pull)
end
end
end
end
end
hh = h:create_topic("configure_ex")
hh:add("The STMP.pinctrl.configure_ex(tbl) function configures pins according to a table.")
hh:add("It is an enhanced version of configure which handles the different families and packages.")
hh:add("The argument must be a table with one entry per STMP family.")
hh:add("Each entry must a subtable with one subentry per package.")
hh:add("Each subentry must be a valid argument to STMP.pinctrl.configure().")
hh:add("The family names are the one returned by STMP.family.")
hh:add("The table can also contain an entry \"all\" which apply to all families")
hh:add("The package names are the one returned by STMP.digctl.package().")
hh:add("The table can also contain an entry \"all\" which apply to all packages.")
function STMP.pinctrl.configure_ex(tbl)
if type(tbl) ~= "table" then error("Parameter must be a table") end
local pack = STMP.digctl.package()
if tbl[STMP.family] ~= nil then
if tbl[STMP.family][pack] ~= nil then STMP.pinctrl.configure(tbl[STMP.family][pack]) end
if tbl[STMP.family]["all"] ~= nil then STMP.pinctrl.configure(tbl[STMP.family]["all"]) end
end
if tbl["all"] ~= nil then
if tbl["all"][pack] ~= nil then STMP.pinctrl.configure(tbl["all"][pack]) end
if tbl["all"]["all"] ~= nil then STMP.pinctrl.configure(tbl["all"]["all"]) end
end
end
hh = h:create_topic("lcdif")
hh:add("The STMP.pinctrl.lcdif tables provides some high level routines to configure the pins.")
hh:add("It is specialised to configure the LCDIF pins correctly.")
hh:add("Some of the modes may not be available on all STMP families.")
STMP.pinctrl.lcdif = {}
local hhh = hh:create_topic("setup_system")
hhh:add("The STMP.pinctrl.lcdif.setup_system(bus_width,busy) functions configure the LCDIF pins.")
hhh:add("It only take cares of the pins used in system mode and for a specified bus width.")
hhh:add("The handled bus widths are 8, 16 and 18")
hhh:add("The busy pin is configured only if busy is true")
function STMP.pinctrl.lcdif.setup_system(bus_width, busy)
local common =
{
stmp3600 =
{
all =
{
lcd_reset = { bank = 1, pin = 16, muxsel = "MAIN"},
lcd_rs = { bank = 1, pin = 17, muxsel = "MAIN"},
lcd_wr = { bank = 1, pin = 18, muxsel = "MAIN"},
lcd_cs = { bank = 1, pin = 19, muxsel = "MAIN"},
lcd_d0 = {bank = 1, pin = 0, muxsel = "MAIN"},
lcd_d1 = {bank = 1, pin = 1, muxsel = "MAIN"},
lcd_d2 = {bank = 1, pin = 2, muxsel = "MAIN"},
lcd_d3 = {bank = 1, pin = 3, muxsel = "MAIN"},
lcd_d4 = {bank = 1, pin = 4, muxsel = "MAIN"},
lcd_d5 = {bank = 1, pin = 5, muxsel = "MAIN"},
lcd_d6 = {bank = 1, pin = 6, muxsel = "MAIN"},
lcd_d7 = {bank = 1, pin = 7, muxsel = "MAIN"}
}
},
stmp3700 =
{
all =
{
lcd_reset = { bank = 1, pin = 16, muxsel = "MAIN"},
lcd_rs = { bank = 1, pin = 17, muxsel = "MAIN"},
lcd_wr = { bank = 1, pin = 18, muxsel = "MAIN"},
lcd_rd = { bank = 1, pin = 19, muxsel = "MAIN"},
lcd_cs = { bank = 1, pin = 20, muxsel = "MAIN"},
lcd_d0 = {bank = 1, pin = 0, muxsel = "MAIN"},
lcd_d1 = {bank = 1, pin = 1, muxsel = "MAIN"},
lcd_d2 = {bank = 1, pin = 2, muxsel = "MAIN"},
lcd_d3 = {bank = 1, pin = 3, muxsel = "MAIN"},
lcd_d4 = {bank = 1, pin = 4, muxsel = "MAIN"},
lcd_d5 = {bank = 1, pin = 5, muxsel = "MAIN"},
lcd_d6 = {bank = 1, pin = 6, muxsel = "MAIN"},
lcd_d7 = {bank = 1, pin = 7, muxsel = "MAIN"}
}
},
imx233 =
{
all =
{
lcd_reset = { bank = 1, pin = 18, muxsel = "MAIN"},
lcd_rs = { bank = 1, pin = 19, muxsel = "MAIN"},
lcd_wr = { bank = 1, pin = 20, muxsel = "MAIN"},
lcd_cs = { bank = 1, pin = 21, muxsel = "MAIN"},
lcd_d0 = {bank = 1, pin = 0, muxsel = "MAIN"},
lcd_d1 = {bank = 1, pin = 1, muxsel = "MAIN"},
lcd_d2 = {bank = 1, pin = 2, muxsel = "MAIN"},
lcd_d3 = {bank = 1, pin = 3, muxsel = "MAIN"},
lcd_d4 = {bank = 1, pin = 4, muxsel = "MAIN"},
lcd_d5 = {bank = 1, pin = 5, muxsel = "MAIN"},
lcd_d6 = {bank = 1, pin = 6, muxsel = "MAIN"},
lcd_d7 = {bank = 1, pin = 7, muxsel = "MAIN"}
}
}
}
local bus8_15 =
{
stmp3600 =
{
all =
{
lcd_d8 = {bank = 1, pin = 8, muxsel = "MAIN"},
lcd_d9 = {bank = 1, pin = 9, muxsel = "MAIN"},
lcd_d10 = {bank = 1, pin = 10, muxsel = "MAIN"},
lcd_d11 = {bank = 1, pin = 11, muxsel = "MAIN"},
lcd_d12 = {bank = 1, pin = 12, muxsel = "MAIN"},
lcd_d13 = {bank = 1, pin = 13, muxsel = "MAIN"},
lcd_d14 = {bank = 1, pin = 14, muxsel = "MAIN"},
lcd_d15 = {bank = 1, pin = 15, muxsel = "MAIN"}
}
},
stmp3700 =
{
all =
{
lcd_d8 = {bank = 1, pin = 8, muxsel = "MAIN"},
lcd_d9 = {bank = 1, pin = 9, muxsel = "MAIN"},
lcd_d10 = {bank = 1, pin = 10, muxsel = "MAIN"},
lcd_d11 = {bank = 1, pin = 11, muxsel = "MAIN"},
lcd_d12 = {bank = 1, pin = 12, muxsel = "MAIN"},
lcd_d13 = {bank = 1, pin = 13, muxsel = "MAIN"},
lcd_d14 = {bank = 1, pin = 14, muxsel = "MAIN"},
lcd_d15 = {bank = 1, pin = 15, muxsel = "MAIN"}
}
},
imx233 =
{
all =
{
lcd_d8 = {bank = 1, pin = 8, muxsel = "MAIN"},
lcd_d9 = {bank = 1, pin = 9, muxsel = "MAIN"},
lcd_d10 = {bank = 1, pin = 10, muxsel = "MAIN"},
lcd_d11 = {bank = 1, pin = 11, muxsel = "MAIN"},
lcd_d12 = {bank = 1, pin = 12, muxsel = "MAIN"},
lcd_d13 = {bank = 1, pin = 13, muxsel = "MAIN"},
lcd_d14 = {bank = 1, pin = 14, muxsel = "MAIN"},
lcd_d15 = {bank = 1, pin = 15, muxsel = "MAIN"}
}
}
}
local bus16_17 =
{
imx233 =
{
all =
{
lcd_d16 = {bank = 1, pin = 16, muxsel = "MAIN"},
lcd_d17 = {bank = 1, pin = 17, muxsel = "MAIN"},
}
}
}
local busy_pin =
{
stmp3600 =
{
all =
{
lcd_busy = { bank = 1, pin = 21, muxsel = "MAIN"},
}
},
stmp3700 =
{
all =
{
lcd_busy = { bank = 1, pin = 21, muxsel = "MAIN"},
}
},
}
STMP.pinctrl.configure_ex(common)
if bus_width > 8 then
STMP.pinctrl.configure_ex(bus8_15)
end
if bus_width > 16 then
STMP.pinctrl.configure_ex(bus16_17)
end
if busy then
STMP.pinctrl.configure_ex(busy_pin)
end
end
STMP.pinctrl.i2c = {}
local hhh = hh:create_topic("setup")
hhh:add("The STMP.pinctrl.i2c.setup() functions configure the I2C pins.")
function STMP.pinctrl.i2c.setup()
local pins =
{
stmp3700 =
{
all =
{
i2c_scl = { bank = 2, pin = 5, muxsel = "MAIN", pull = true},
i2c_sda = { bank = 2, pin = 6, muxsel = "MAIN", pull = true}
}
},
imx233 =
{
all =
{
i2c_scl = { bank = 0, pin = 30, muxsel = "MAIN", pull = true},
i2c_sda = { bank = 0, pin = 31, muxsel = "MAIN", pull = true}
}
}
}
STMP.pinctrl.configure_ex(pins)
end
|
