CMD_ON = 175
CMD_OFF = 174
CMD_CHARGE_PUMP_SET = 141
CMD_SET_ROW = 176

CMD_TOP_TO_BOTTOM = 200
CMD_LEFT_TO_RIGHT = 161
CMD_SET_ADDR_MODE = 32
ADDR_MODE_HORIZ = 0b00
CHARGE_PUMP_ON = 20

CMD_BUF = bytearray(1)

def command(*cmds):
    for cmd in cmds:
        CMD_BUF[0] = cmd
        i2c.write(60, CMD_BUF, prefix=128)

def display_init():
    i2c.init(1000000)
    command(CMD_OFF)
    sleep(10)
    command(CMD_ON)
    command(CMD_TOP_TO_BOTTOM, CMD_LEFT_TO_RIGHT)
    sleep(10)
    command(CMD_SET_ADDR_MODE, ADDR_MODE_HORIZ)
    command(0x21, 0, 127)
    command(CMD_CHARGE_PUMP_SET, CHARGE_PUMP_ON)