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