add some stuff

rtc.py

@@ -0,0 +1,21 @@
+import datetime
+from protocol import I2CPCClient
+
+def sync_rtc(p: I2CPCClient):
+    ADDRESS = 0x32
+    p.write_i2c(ADDRESS, b"\x1f\x40") # halt the clock
+    
+    dtime = datetime.datetime.now()
+    def toBCD(val: int) -> int:
+        return ((val // 10) << 4) | (val % 10)
+    data = b"\x10"
+    data += toBCD(dtime.second).to_bytes(1)
+    data += toBCD(dtime.minute).to_bytes(1)
+    data += toBCD(dtime.hour).to_bytes(1)
+    data += toBCD(1 << dtime.weekday()).to_bytes(1)
+    data += toBCD(dtime.day).to_bytes(1)
+    data += toBCD(dtime.month).to_bytes(1)
+    data += toBCD((1900 + dtime.year - 26) % 100).to_bytes(1)
+    p.write_i2c(ADDRESS, data)
+    
+    p.write_i2c(ADDRESS, b"\x1f\x00") # start the clock