set i2c frequency to 400 kHz

Author: xiongyihui

keyboard/model/is32fl3733.py

@@ -17,7 +17,8 @@ def __init__(self, address=0x50):
         self.power.direction = digitalio.Direction.OUTPUT
         self.power.value = 1
 
-        self.i2c = board.I2C()
+        # self.i2c = board.I2C()
+        self.i2c = busio.I2C(board.SCL, board.SDA, frequency=400000)
         self.i2c.try_lock()
         # print(self.i2c.scan())