stuff

display.py

@@ -1,18 +1,23 @@
+import asyncio
 from LCD import LCD
 
 class display:
-    def __init__(self, width=16, height=4, i2c_addr=0x27):
+    async def __init__(self, width=20, height=4, i2c_addr=0x27):
         self.width = width
         self.height = height
         self.device = LCD(2, i2c_addr, True)
         self.contents = [""] * self.height
     
-    def redraw(self):
-        for row, line in enumerate(self.contents):
-            self.device.message(row + 1, line)
+    async def redraw(self, row = None):
+        if row == None:
+            for row, line in enumerate(self.contents):
+                await self.device.async_message(row + 1, line)
+        else:
+            await self.device.async_message(row + 1, line)
     
-    def read(self):
-        pass
+    async def read(self, row):
+        return self.contents[row]
     
-    def write(self):
-        pass
+    async def write(self, row, data, offset = 0):
+        self.contents[row] = f'{self.contents[row][:offset]}{data}{self.contents[row][offset+len(data):]}'
+        self.redraw(row)