###sipeed转接板+7寸显示屏白屏问题
硬件：Maixdock ，sipeed转接板，导航7寸显示屏（7寸 40针 800*480分辨率）
问题：连接后7寸显示屏不能正常运行，成暗白屏状态
程序：`from Maix import GPIO, I2S
from fpioa_manager import fm
import lcd
import video
import time
lcd.init(type=5,lcd_type=3)
AUDIO_PA_EN_PIN = None # Bit Dock and old MaixGo
AUDIO_PA_EN_PIN = 32 # Maix Go(version 2.20)
AUDIO_PA_EN_PIN = 2 # Maixduino
init i2s(i2s0)
i2s = I2S(I2S.DEVICE_0)
config i2s according to audio info
i2s.channel_config(i2s.CHANNEL_1, I2S.TRANSMITTER, resolution=I2S.RESOLUTION_16_BIT,
cycles=I2S.SCLK_CYCLES_32, align_mode=I2S.RIGHT_JUSTIFYING_MODE)
open audio PA
if AUDIO_PA_EN_PIN:
fm.register(AUDIO_PA_EN_PIN, fm.fpioa.GPIO1, force=True)
wifi_en = GPIO(GPIO.GPIO1, GPIO.OUT)
wifi_en.value(1)
fm.register(34, fm.fpioa.I2S0_OUT_D1, force=True)
fm.register(35, fm.fpioa.I2S0_SCLK, force=True)
fm.register(33, fm.fpioa.I2S0_WS, force=True)
def Video_Play():
v = video.open(“/sd/badapple.avi”)
print(v)
v.volume(50)
while True:
if v.play() == 0:
print(“play end”)
break
v.del()
if name==‘main’:
while(True):
Video_Play()`
