这是为什么啊？要怎么改？

import time
from pyb import Pin, SPI
cs  = Pin("P3", Pin.OUT_OD)    #片选线，推挽输出_OUT_PP ——IO输出0-接GND， IO输出1 -接VCC，读输入值是未知的
rst = Pin("P7", Pin.OUT_PP)    #复位，开漏输出_OUT_OD ——IO输出0接GND，IO输出1，悬空，需要外接上拉电阻，才能实现输出高电平。当输出为1时，IO口的状态由上拉电阻拉高电平，但由于是开漏输出模式，这样IO口也就可以由外部电路改变为低电平或不变。可以读IO输入电平变化，实现C51的IO双向功能
rs  = Pin("P8", Pin.OUT_PP)    #数据命令选择线
bl  = Pin("P6", Pin.OUT_PP)     # 背光控制
spi = SPI(2, SPI.MASTER, baudrate=int(10000000000/66*0.06), polarity=0, phase=0,bits=8)

# SPI 写命令
def write_command_byte(c):
    cs.low()
    rs.low()
    spi.send(c)
    cs.high()

# SPI 写数据
def write_data_byte(c):
    cs.low()
    rs.high()
    spi.send(c)
    cs.high()

def write_command(c, *data): #命令数据一起写，先写命令 第二个开始为数据位。如果只写一个，则代表不写数据只写命令。
    write_command_byte(c)
    if data:
        for d in data:
            if d > 255:
                write_data_byte(d >> 8)
                write_data_byte(d&0xFF)
            else:
                write_data_byte(d)

def write_image(img):
    cs.low()
    rs.high()
    fbuf = bytearray(320)
    for m in img: 					#把一帧图像的对象取出来，放到帧缓存区中
        fbuf=m
        for i in range(0,320):		#每行每行的发送
            spi.send(fbuf[i]>>8)	#先发第N行的第I个数据的高八位
            spi.send(fbuf[i]&0xFF)	#再发低八位
    cs.high()

def SetRegion(xStar, yStar, xEnd, yEnd):
    write_command(0x2A, xStar>>8, xStar&0XFF, xEnd>>8, xEnd&0XFF)
    write_command(0x2B, yStar>>8, yStar&0XFF, yEnd>>8, yEnd&0XFF)
    write_command(0x2C)


def LCDinit():
    rst.low()
    time.sleep_ms(100)
    rst.high()
    time.sleep_ms(100)

    write_command(0xCB, 0x39, 0x2c, 0x00, 0x34, 0x02)
    write_command(0xCF, 0x00, 0XAA, 0XE0)
    write_command(0xE8, 0x85, 0x11, 0x78)
    write_command(0xEA, 0x00, 0x00)
    write_command(0xED, 0x67, 0x03, 0X12, 0X81)
    write_command(0xF7, 0x20)
    write_command(0xC0, 0x21)       # Power control, VRH[5:0]
    write_command(0xC1, 0x11)       # Power control, SAP[2:0];BT[3:0]
    write_command(0xC5, 0x24, 0x3C) # VCM control, 对比度调节
    write_command(0xC7, 0xB7)       # VCM control2, --
    write_command(0x36, 0xE8)
    X_MIN_PIXEL = 0
    Y_MIN_PIXEL = 0
    X_MAX_PIXEL = 128               # 定义屏幕宽度
    Y_MAX_PIXEL = 160               # 定义屏幕高度
    SetRegion(0, 0, X_MAX_PIXEL - 1, Y_MAX_PIXEL - 1)
    write_command(0x3A, 0x55)
    write_command(0xB1, 0x00, 0x18)
    write_command(0xB6, 0x08, 0x82, 0x27)   # Display Function Control
    write_command(0xF2, 0x00)               # 3Gamma Function Disable
    write_command(0x26, 0x01)               # Gamma curve selected
    write_command(0xB7, 0x06)
    write_command(0xE0, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00)
    write_command(0XE1, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F)
    write_command(0x11) # sleep_ms Exit
    time.sleep_ms(120)
    write_command(0x29)
    write_command(0x2C)
    bl.high()   # 拉背光

def LCDdisplay(img):
    write_command(0x2C)
    write_image(img)