hwstub: add some PP and Sansa View code

Change-Id: If188a01adee2a0e1c7a46c424a0a9cde9f666831

1 files changed, 65 insertions, 0 deletions

diff --git a/utils/hwstub/tools/lua/pp/gpio.lua b/utils/hwstub/tools/lua/pp/gpio.lua
new file mode 100644
index 0000000..612c980
--- /dev/null
+++ b/utils/hwstub/tools/lua/pp/gpio.lua
@@ -0,0 +1,65 @@
+---
+--- 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