Multiple 232H

[richcj10]

I have a setup with two 232H for two different I2C busses. I can get only one to work at a time; if both are plugged in, the PY library stops working until I do a driver reinstall. This seems to be a new issue with Windows. Code: `

from pyftdi import FtdiLogger from pyftdi.i2c import I2cController, I2cIOError from time import sleep from array import array as Array from binascii import hexlify import time from pyftdi.ftdi import Ftdi DeviceAddress = 0x50 AddressSpace = 16

DeviceA = 'ftdi://::FT7T9DYH/1' DeviceB = 'ftdi://::FT7T9C0N/1'

GPIO_WIDTH = 1 # use 2 GPIOs for output, 2 GPIOs for input (loopback) GPIO_OUT_OFFSET = 5 # GPIO output are b3..b4 GPIO_IN_OFFSET = 4 # GPIO input are b8..b9

class EEPROM():

def __init__(self,Device):
    Ftdi.show_devices()
    dev = Ftdi.list_devices()
    print(dev)
    self._i2c = I2cController()
    self._i2c.configure(Device)
    self.gpio = self._i2c.get_gpio()
    mask = (1 << GPIO_WIDTH) - 1
    self.gpio.set_direction(mask << GPIO_OUT_OFFSET | mask << GPIO_IN_OFFSET, mask << GPIO_OUT_OFFSET)
    self.DA = DeviceAddress
    self.Bit = AddressSpace
    self.port = self._i2c.get_port(self.DA)

def SetPower(self,State):
    if(State):
        pins = self.gpio.read()
        # clearing out I2C bits (SCL, SDAo, SDAi)
        pins &= 0x07
        # set AD4
        pins |= 1 << 4
        # update GPIO output
        self.gpio.write(pins)
    else:
        pins = self.gpio.read()
        # clearing out I2C bits (SCL, SDAo, SDAi)
        pins &= 0x07
        # Clear AD4
        pins |= 0 << 4
        # update GPIO output
        self.gpio.write(pins)

def SetActive(self,State):
    if(State):
        pins = self.gpio.read()
        # clearing out I2C bits (SCL, SDAo, SDAi)
        pins &= 0x07
        # set AD4
        pins |= 1 << 5
        # update GPIO output
        self.gpio.write(pins)
    else:
        pins = self.gpio.read()
        # clearing out I2C bits (SCL, SDAo, SDAi)
        pins &= 0x07
        # Clear AD4
        pins |= 0 << 5
        # update GPIO output
        self.gpio.write(pins)

def ReadName(self,Pos,Lenth):
    try:
        if(self.Bit == 16):
            #print("16bit")
            device_id = self.port.exchange([0,Pos], Lenth)
            #print(device_id)
        if(self.Bit == 8):
            #print("8bit")
            device_id = self.port.exchange([Pos], Lenth)
            #print(device_id)
    except:
        print("An exception occurred")
        return 0

def DeviceAddress(self,Address):
    self.DA = Address;
    self.port = self._i2c.get_port(self.DA)
    return 0

def DeviceBit(self,Bit):
    self.Bit = Bit;
    return 0

def WriteName(self,Pos,Name):
    new_string = bytes(Name,"ascii")
    if(self.Bit == 16):
        #print("16bit")
        Init = [0,Pos]
    if(self.Bit == 8):
        #print("8bit")
        Init = [Pos]
    Init += bytearray(new_string)
    self.port.write(Init)
    return 0

def ReadByte(self,Pos):
    try:
        if(self.Bit == 16):
            #print("16bit")
            device_Pkt = self.port.exchange([0,Pos], 1)
            return device_Pkt
        if(self.Bit == 8):
            #print("8bit")
            device_Pkt = self.port.exchange([Pos], 1)
            return device_Pkt
    except:
        print("An exception occurred")
        return 0

def WriteByte(self,Pos,Byte):
    try:
        self.port.write_to(Pos, Byte)
    except Exception as A: #(Where A is a temporary variable)
        print(A)
        return 0

def ReadPage(self,Pos): ## 8 Bytes at a time? 
    try:
        if(self.Bit == 16):
            #print("16bit")
            List = self.port.exchange([0,Pos], 8)
            return List
        if(self.Bit == 8):
            #print("8bit")
            List = self.port.exchange([Pos], 8)
            return List
    except:
        print("An exception occurred")
        return 0

def WritePage(self,Pos,ByteArray): ## 16 bytes at a time
    try:
        #print("First List:")
        #print(ByteArray)
        if(self.Bit == 16):
            #print("16bit")
            Init = [0,Pos]
        if(self.Bit == 8):
            #print("8bit")
            Init = [Pos]
        Init += bytearray(ByteArray)
        self.port.write(Init)
    except Exception as A: #(Where A is a temporary variable)
        print(A)
        return 0

Device = EEPROM(DeviceB) Device.WriteName(0,"RickIsCool") Device.ReadName(0,10) ##for i in range(9):

print(i, end=" ")

Device.SetCurrent(i)

time.sleep(3)

`

Any ideas on what I could try differently?

[eblot]

Sorry, I have no idea on how the Windows USB stack works (except that is a gigantic pile of sh*t).

The best place to ask the question would be the Zadig driver or any other Windows USB to libUSB wrapper you are using, I'm afraid :(

I always try to keep away from Windows as much as I can (and I've been successful for the last 22 years :))