diff options
Diffstat (limited to 'utils/hwstub/tools/lua/jz/gpio.lua')
| -rw-r--r-- | utils/hwstub/tools/lua/jz/gpio.lua | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/utils/hwstub/tools/lua/jz/gpio.lua b/utils/hwstub/tools/lua/jz/gpio.lua new file mode 100644 index 0000000000..d85529f9bb --- /dev/null +++ b/utils/hwstub/tools/lua/jz/gpio.lua @@ -0,0 +1,82 @@ +--- +--- 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
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