如何在Raspberry Pi 3中提高I2c速度以读取ads115（模拟数字转换器）？

Question

在这里，我正在使用Raspberry Pi 3从“ sharp gp2y1014au0f” DustSensor中读取数据。由于传感器数据为模拟量，因此我将ads1115用作模拟数字转换器。但是问题是，必须在关闭后的0.32毫秒内读取灰尘传感器的数据。 ads1115的最高速度仅为0.86毫秒。如何使用树莓派3从Sharp Gp2y1014au0f读取数据？

我已经更改了ads1115库中读取的数据，但仅获得0.82毫秒。所以仍然没有得到数据

import RPi.GPIO as GPIO
import time

from AdsValue import getData #this ads1115 program i made


   GPIO.setmode(GPIO.BCM)
   GPIO.setwarnings(False)
   GPIO.setup(18,GPIO.OUT)

   def getDustData():
       Vo = 0
       VT = 0
       K = 0.5
       data = 0
       for i in range(30):
           begin = time.perf_counter_ns()

           #print ("LED off")
           GPIO.output(18,GPIO.LOW)
           #time.sleep(280/1000000) #sleep 0.28 millisecond or 280 microsecond

           data = getData(0) #call get data to get data from ads1115

           #print ("LED on")
           GPIO.output(18,GPIO.HIGH)
           time.sleep(9620/1000000) #slepp 9.62 millissecond or 9620 microsecond
           end = time.perf_counter_ns()

           #print(data)
           VT += data
           waktu = (end-begin)/1000000 #time in nano so it in milli second
       V = VT/30 
       dev = V-Vo
       return dev/K*100, waktu


   while True:
       Debu = getDustData()
       print("Data :",Debu)

此AdsValue.py程序

import time
from Libs.ads1115 import ADS1115

adc = ADS1115()
GAIN = 1

def getData(Pin):
    values = adc.read_adc(Pin, gain=GAIN)
    value  = values*(4.09/32767)
    return value