clef usb i2c

Bonjour à tous,

j'ai fait l'acquisition d'une clef USB I2C : MCU-200 FT200XD, je cherche de quoi scanner le bus I2C et envoyer ou recevoir des commandes à 2 modules MCP23017

Merci par avance pour votre aide

PS : j'ai installé le pilote et j'ai une librairie Delphi mais je ne sais pas l'utiliser

Bonsoir,

Citation:

Envoyé par herrflick13

j'ai une librairie Delphi mais je ne sais pas l'utiliser

Tu ne sais pas utiliser la librairie ou tu ne sais pas utiliser Delphi ?

je sais utiliser Delphi, les librairies avec des exemples, mais là, il n'y a aucun exemple, je suis un peu perdu :?

En général la lecture du .pas équivalent du .h de la DLL (si c'est library dans ce sens) est source de connaissance.

C'est bien trop spécifique pour fournir une réponse, surtout que l'on n'a pas spécialement d'information utile en dehors du modèle qui avec une rapide recherche utilise le protocole C-Bus mais pas d'indication sur l'existence d'un mode Discovery, c'est effectivement la "I2C library" qui fourni le Discovery

Delphi

Petite question : est ce que ton projet concerne le protocole ModBus ?

Bonjour,
S'il s'agit de ModBUS, es-tu allé voir des composants de Mitov https://www.mitov.com/products/controllab#components ?

Avant d'aller sur un autre protocole, le problème semble le discovery, c'est à dire que l'interface USB vers I2C (FT200XD) ne connaît pas les adresses (généralement sur 7 bits) des modules I2C.

Regarde ta library I2C, tu auras probablement des commandes type BeginTransmission / EndTransmission, ou des synonymes, tu peux "ping" chaque adresse, si tu as un ACK à la fin de transmission, c'est qu'il y a un module à cette adresse.
Je te recommande de te renseigner sur les échanges maître ↔ esclave en I2C (c'est le niveau Couche liaison de données) qu'il faut différencier du câblage de la Couche physique.

Pour t'aider, il nous faut le header de la library I2C, est-ce bien une DLL ou un librarie Delphi, codée en Delphi directement ?

La plupart des microcontrôleurs supportent la communication via I2C directement par matériel ou par programmation alors il est possible de placer un microcontrôleur pour piloter les deux MCP23017 et établir une communication RS232 avec le PC pire lire ou écrire les commandes.

Bonsoir à tous

Merci pour vos précieux conseils, en fait mon unit Delphi utilise une dll. Je me suis intéressé de plus près à son contenu. Si j'ai bien compris, on utilise un port RS232 qui s'occupe de la communication entre le PC et la clef. J'ai recherché un bouquin sur les communications I2C mais je n'ai rien trouvé de très concluant.
Voici le code de la librairie

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unit D2XXUnit;
 
interface
Uses Windows,Forms,Dialogs, Messages, SysUtils, Variants, Classes, Graphics, Controls;
 
Type FT_Result = Integer;
 
 
 
// Device Info Node structure for info list functions
type FT_Device_Info_Node = record
  Flags         : DWord;
  DeviceType    : Dword;
  ID            : DWord;
  LocID         : DWord;
  SerialNumber  : array [0..15] of Char;
  Description   : array [0..63] of Char;
  DeviceHandle  : DWord;
end;
 
 
type TDWordptr = ^DWord;
 
// Structure to hold EEPROM data for FT_EE_Program function
TFT_Program_Data = record
  Signature1        : DWord;
  Signature2        : DWord;
  Version           : DWord;
  VendorID          : Word;
  ProductID         : Word;
  Manufacturer      : PChar;
  ManufacturerID    : PChar;
  Description       : PChar;
  SerialNumber      : PChar;
  MaxPower          : Word;
  PnP               : Word;
  SelfPowered       : Word;
  RemoteWakeup      : Word;
// Rev4 extensions
  Rev4              : Byte;
  IsoIn             : Byte;
  IsoOut            : Byte;
  PullDownEnable    : Byte;
  SerNumEnable      : Byte;
  USBVersionEnable  : Byte;
  USBVersion        : Word;
// FT2232C extensions
  Rev5              : Byte;
  IsoInA            : Byte;
  IsoInB            : Byte;
  IsoOutA           : Byte;
  IsoOutB           : Byte;
  PullDownEnable5   : Byte;
  SerNumEnable5     : Byte;
  USBVersionEnable5 : Byte;
  USBVersion5       : Word;
  AIsHighCurrent    : Byte;
  BIsHighCurrent    : Byte;
  IFAIsFifo         : Byte;
  IFAIsFifoTar      : Byte;
  IFAIsFastSer      : Byte;
  AIsVCP            : Byte;
  IFBIsFifo         : Byte;
  IFBIsFifoTar      : Byte;
  IFBIsFastSer      : Byte;
  BIsVCP            : Byte;
// FT232R extensions
  UseExtOsc         : Byte;
  HighDriveIOs      : Byte;
  EndpointSize      : Byte;
  PullDownEnableR   : Byte;
  SerNumEnableR     : Byte;
  InvertTXD         : Byte;
  InvertRXD         : Byte;
  InvertRTS         : Byte;
  InvertCTS         : Byte;
  InvertDTR         : Byte;
  InvertDSR         : Byte;
  InvertDCD         : Byte;
  InvertRI          : Byte;
  Cbus0             : Byte;
  Cbus1             : Byte;
  Cbus2             : Byte;
  Cbus3             : Byte;
  Cbus4             : Byte;
  RIsVCP            : Byte;
end;
 
 
// Exported Functions
// Classic Functions
Function GetFTDeviceCount : FT_Result;
Function GetFTDeviceSerialNo(DeviceIndex:DWord) : FT_Result;
Function GetFTDeviceDescription(DeviceIndex:DWord) : FT_Result;
Function GetFTDeviceLocation(DeviceIndex:DWord) : FT_Result;
Function Open_USB_Device : FT_Result;
Function Open_USB_Device_By_Serial_Number(Serial_Number:string) : FT_Result;
Function Open_USB_Device_By_Device_Description(Device_Description:string) : FT_Result;
Function Open_USB_Device_By_Device_Location(Location:DWord) : FT_Result;
Function Close_USB_Device : FT_Result;
Function Read_USB_Device_Buffer(Read_Count:Integer) : Integer;
Function Write_USB_Device_Buffer(Write_Count:Integer) : Integer;
Function Reset_USB_Device : FT_Result;
Function Set_USB_Device_BaudRate : FT_Result;
Function Set_USB_Device_BaudRate_Divisor(Divisor:Dword) : FT_Result;
Function Set_USB_Device_DataCharacteristics : FT_Result;
Function Set_USB_Device_FlowControl : FT_Result;
Function Set_USB_Device_RTS : FT_Result;
Function Clr_USB_Device_RTS : FT_Result;
Function Set_USB_Device_DTR : FT_Result;
Function Clr_USB_Device_DTR : FT_Result;
Function Get_USB_Device_ModemStatus : FT_Result;
Function Set_USB_Device_Chars : FT_Result;
Function Purge_USB_Device_Out : FT_Result;
Function Purge_USB_Device_In : FT_Result;
Function Set_USB_Device_TimeOuts(ReadTimeOut,WriteTimeOut:DWord) : FT_Result;
Function Get_USB_Device_QueueStatus : FT_Result;
Function Set_USB_Device_Break_On : FT_Result;
Function Set_USB_Device_Break_Off : FT_Result;
Function Get_USB_Device_Status : FT_Result;
Function Set_USB_Device_Event_Notification(EventMask:DWord) : FT_Result;
Function USB_FT_GetDeviceInfo(DevType,ID:DWord; SerialNumber,Description:array of char) : FT_Result;
Function Set_USB_Device_Reset_Pipe_Retry_Count(RetryCount:DWord) : FT_Result;
Function Stop_USB_Device_InTask : FT_Result;
Function Restart_USB_Device_InTask : FT_Result;
Function Reset_USB_Port : FT_Result;
Function Cycle_USB_Port : FT_Result;
Function Create_USB_Device_List : FT_Result;
Function Get_USB_Device_List : FT_Result;
Function Get_USB_Device_List_Detail(Index:DWord) : FT_Result;
// EEPROM Functions
function USB_FT_EE_Read : FT_Result;
function USB_FT_C_EE_Read : FT_Result;
function USB_FT_R_EE_Read : FT_Result;
function USB_FT_EE_Program : FT_Result;
function USB_FT_ReadEE(WordAddr:Dword) : FT_Result;
function USB_FT_WriteEE(WordAddr:Dword;WordData:Word) : FT_Result;
function USB_FT_EraseEE : FT_Result;
function USB_FT_EE_UARead : FT_Result;
function USB_FT_EE_UAWrite : FT_Result;
function USB_FT_EE_UASize : FT_Result;
// FT2232C, FT232BM and FT245BM Extended API Functions
Function Get_USB_Device_LatencyTimer : FT_Result;
Function Set_USB_Device_LatencyTimer(Latency : Byte) : FT_Result;
Function Get_USB_Device_BitMode(var BitMode:Byte) : FT_Result;
Function Set_USB_Device_BitMode(Mask, Enable:Byte) : FT_Result;
Function Set_USB_Parameters(InSize, OutSize:Dword) : FT_Result;
 
Function Get_USB_Driver_Version(DrVersion :  TDWordptr): FT_Result;
Function Get_USB_Library_Version(LbVersion :  TDWordptr): FT_Result;
 
 
 
 
Var
// Port Handle Returned by the Open Function
// Used by the Subsequent Function Calls
    FT_HANDLE : DWord = 0;
// Used to handle multiple device instances in future
// versions. Must be set to 0 for now.
//    PV_Device : DWord = 0;
 
// Holding Variables for the current settings
// Can be configured visually using the CFGUnit Unit
// or manually before calling SetUp_USB_Device
    FT_Current_Baud : Dword;
    FT_Current_DataBits : Byte;
    FT_Current_StopBits : Byte;
    FT_Current_Parity : Byte;
    FT_Current_FlowControl : Word;
    FT_RTS_On : Boolean;
    FT_DTR_On : Boolean;
    FT_Event_On : Boolean;
    FT_Error_On : Boolean;
    FT_XON_Value : Byte = $11;
    FT_XOFF_Value : Byte = $13;
    FT_EVENT_Value : Byte = $0;
    FT_ERROR_Value : Byte = $0;
// Used by CFGUnit to flag a bad value
    FT_SetupError : Boolean;
// Used to Return the current Modem Status
    FT_Modem_Status : DWord;
//  Used to return the number of bytes pending
//  in the Rx Buffer Queue
    FT_Q_Bytes : DWord;
    FT_TxQ_Bytes : DWord;
    FT_Event_Status : DWord;
//  Used to Enable / Disable the Error Report Dialog
    FT_Enable_Error_Report : Boolean = True;
//  Deposit for Get latency timer
    FT_LatencyRd : Byte;
 
    FT_DeviceInfoList : array of FT_Device_Info_Node;
 
    Manufacturer: array [0..63] of char;
    ManufacturerID: array [0..15] of char;
    Description:  array [0..63] of char;
    SerialNumber:  array [0..15] of char;
    LocID : DWord;
    EEDataBuffer : TFT_Program_Data;
    UserData :  array [0..63] of byte;
    FT_UA_Size : integer;
    WordRead : Word;
 
 
Const
// FT_Result Values
    FT_OK = 0;
    FT_INVALID_HANDLE = 1;
    FT_DEVICE_NOT_FOUND = 2;
    FT_DEVICE_NOT_OPENED = 3;
    FT_IO_ERROR = 4;
    FT_INSUFFICIENT_RESOURCES = 5;
    FT_INVALID_PARAMETER = 6;
    FT_SUCCESS = FT_OK;
    FT_INVALID_BAUD_RATE = 7;
    FT_DEVICE_NOT_OPENED_FOR_ERASE = 8;
    FT_DEVICE_NOT_OPENED_FOR_WRITE = 9;
    FT_FAILED_TO_WRITE_DEVICE = 10;
    FT_EEPROM_READ_FAILED = 11;
    FT_EEPROM_WRITE_FAILED = 12;
    FT_EEPROM_ERASE_FAILED = 13;
    FT_EEPROM_NOT_PRESENT = 14;
    FT_EEPROM_NOT_PROGRAMMED = 15;
    FT_INVALID_ARGS = 16;
    FT_OTHER_ERROR = 17;
// FT_Open_Ex Flags
    FT_OPEN_BY_SERIAL_NUMBER = 1;
    FT_OPEN_BY_DESCRIPTION = 2;
    FT_OPEN_BY_LOCATION = 4;
// FT_List_Devices Flags
    FT_LIST_NUMBER_ONLY = $80000000;
    FT_LIST_BY_INDEX = $40000000;
    FT_LIST_ALL = $20000000;
// Baud Rate Selection
    FT_BAUD_300 = 300;
    FT_BAUD_600 = 600;
    FT_BAUD_1200 = 1200;
    FT_BAUD_2400 = 2400;
    FT_BAUD_4800 = 4800;
    FT_BAUD_9600 = 9600;
    FT_BAUD_14400 = 14400;
    FT_BAUD_19200 = 19200;
    FT_BAUD_38400 = 38400;
    FT_BAUD_57600 = 57600;
    FT_BAUD_115200 = 115200;
    FT_BAUD_230400 = 230400;
    FT_BAUD_460800 = 460800;
    FT_BAUD_921600 = 921600;
// Data Bits Selection
    FT_DATA_BITS_7 = 7;
    FT_DATA_BITS_8 = 8;
// Stop Bits Selection
    FT_STOP_BITS_1 = 0;
    FT_STOP_BITS_2 = 2;
// Parity Selection
    FT_PARITY_NONE = 0;
    FT_PARITY_ODD = 1;
    FT_PARITY_EVEN = 2;
    FT_PARITY_MARK = 3;
    FT_PARITY_SPACE = 4;
// Flow Control Selection
    FT_FLOW_NONE = $0000;
    FT_FLOW_RTS_CTS = $0100;
    FT_FLOW_DTR_DSR = $0200;
    FT_FLOW_XON_XOFF = $0400;
// Purge Commands
    FT_PURGE_RX = 1;
    FT_PURGE_TX = 2;
// Notification Events
    FT_EVENT_RXCHAR = 1;
    FT_EVENT_MODEM_STATUS = 2;
// Modem Status
    CTS = $10;
    DSR = $20;
    RI = $40;
    DCD = $80;
 
 
// IO Buffer Sizes
    FT_In_Buffer_Size = $10000;    // 64k
    FT_In_Buffer_Index = FT_In_Buffer_Size - 1;
    FT_Out_Buffer_Size = $10000;    // 64k
    FT_Out_Buffer_Index = FT_Out_Buffer_Size - 1;
// DLL Name
    FT_DLL_Name = 'FTD2XX.DLL';
 
 
var
// Declare Input and Output Buffers
   FT_In_Buffer : Array[0..FT_In_Buffer_Index] of Byte;
   FT_Out_Buffer : Array[0..FT_Out_Buffer_Index] of Byte;
// A variable used to detect time-outs
// Attach a timer to the main project form
// which decrements this every 10mS if
// FT_TimeOut_Count <> 0
   FT_TimeOut_Count : Integer = 0;
// Used to determine how many bytes were
// actually received by FT_Read_Device_All
// in the case of a time-out
   FT_All_Bytes_Received : Integer = 0;
   FT_IO_Status : Ft_Result = FT_OK;
// Used By FT_ListDevices
   FT_Device_Count : DWord;
   FT_Device_String_Buffer : array [1..50] of Char;
   FT_Device_String : String;
   FT_Device_Location : DWord;
   USB_Device_Info_Node : FT_Device_Info_Node;
   FT_Event_Handle : DWord;
 
 
implementation
//Classic functions
function FT_GetNumDevices(pvArg1:Pointer; pvArg2:Pointer; dwFlags:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_ListDevices';
function FT_ListDevices(pvArg1:Dword; pvArg2:Pointer; dwFlags:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_ListDevices';
function FT_Open(Index:Integer; ftHandle:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_Open';
function FT_OpenEx(pvArg1:Pointer; dwFlags:Dword; ftHandle:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_OpenEx';
function FT_OpenByLocation(pvArg1:DWord; dwFlags:Dword; ftHandle:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_OpenEx';
function FT_Close(ftHandle:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_Close';
function FT_Read(ftHandle:Dword; FTInBuf:Pointer; BufferSize:LongInt; ResultPtr:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_Read';
function FT_Write(ftHandle:Dword; FTOutBuf:Pointer; BufferSize:LongInt; ResultPtr:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_Write';
function FT_ResetDevice(ftHandle:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_ResetDevice';
function FT_SetBaudRate(ftHandle:Dword; BaudRate:DWord):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetBaudRate';
function FT_SetDivisor(ftHandle:Dword; Divisor:DWord):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetDivisor';
function FT_SetDataCharacteristics(ftHandle:Dword; WordLength,StopBits,Parity:Byte):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetDataCharacteristics';
function FT_SetFlowControl(ftHandle:Dword; FlowControl:Word; XonChar,XoffChar:Byte):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetFlowControl';
function FT_SetDtr(ftHandle:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetDtr';
function FT_ClrDtr(ftHandle:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_ClrDtr';
function FT_SetRts(ftHandle:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetRts';
function FT_ClrRts(ftHandle:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_ClrRts';
function FT_GetModemStatus(ftHandle:Dword; ModemStatus:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_GetModemStatus';
function FT_SetChars(ftHandle:Dword; EventChar,EventCharEnabled,ErrorChar,ErrorCharEnabled:Byte):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetChars';
function FT_Purge(ftHandle:Dword; Mask:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_Purge';
function FT_SetTimeouts(ftHandle:Dword; ReadTimeout,WriteTimeout:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetTimeouts';
function FT_GetQueueStatus(ftHandle:Dword; RxBytes:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_GetQueueStatus';
function FT_SetBreakOn(ftHandle:Dword) : FT_Result; stdcall; External FT_DLL_Name name 'FT_SetBreakOn';
function FT_SetBreakOff(ftHandle:Dword) : FT_Result; stdcall; External FT_DLL_Name name 'FT_SetBreakOff';
function FT_GetStatus(ftHandle:DWord; RxBytes,TxBytes,EventStatus:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_GetStatus';
function FT_SetEventNotification(ftHandle:DWord; EventMask:DWord; pvArgs:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetEventNotification';
function FT_GetDeviceInfo(ftHandle:DWord; DevType,ID,SerNum,Desc,pvDummy:Pointer) : FT_Result; stdcall; External FT_DLL_Name name 'FT_GetDeviceInfo';
function FT_SetResetPipeRetryCount(ftHandle:Dword; RetryCount:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetResetPipeRetryCount';
function FT_StopInTask(ftHandle:Dword) : FT_Result; stdcall; External FT_DLL_Name name 'FT_StopInTask';
function FT_RestartInTask(ftHandle:Dword) : FT_Result; stdcall; External FT_DLL_Name name 'FT_RestartInTask';
function FT_ResetPort(ftHandle:Dword) : FT_Result; stdcall; External FT_DLL_Name name 'FT_ResetPort';
function FT_CyclePort(ftHandle:Dword) : FT_Result; stdcall; External 'FTD2XX.DLL' name 'FT_CyclePort';
function FT_CreateDeviceInfoList(NumDevs:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_CreateDeviceInfoList';
function FT_GetDeviceInfoList(pFT_Device_Info_List:Pointer; NumDevs:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_GetDeviceInfoList';
function FT_GetDeviceInfoDetail(Index:DWord; Flags,DevType,ID,LocID,SerialNumber,Description,DevHandle:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_GetDeviceInfoDetail';
function FT_GetDriverVersion(ftHandle:Dword; DrVersion:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_GetDriverVersion';
function FT_GetLibraryVersion(LbVersion:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_GetLibraryVersion';
 
// EEPROM functions
function FT_EE_Read(ftHandle:DWord; pEEData:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_EE_Read';
function FT_EE_Program(ftHandle:DWord; pEEData:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_EE_Program';
// EEPROM primitives - you need an NDA for EEPROM checksum
function FT_ReadEE(ftHandle:DWord; WordAddr:DWord; WordRead:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_ReadEE';
function FT_WriteEE(ftHandle:DWord; WordAddr:DWord; WordData:word):FT_Result; stdcall; External FT_DLL_Name name 'FT_WriteEE';
function FT_EraseEE(ftHandle:DWord):FT_Result; stdcall; External FT_DLL_Name name 'FT_EraseEE';
function FT_EE_UARead(ftHandle:DWord; Data:Pointer; DataLen:DWord; BytesRead:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_EE_UARead';
function FT_EE_UAWrite(ftHandle:DWord; Data:Pointer; DataLen:DWord):FT_Result; stdcall; External FT_DLL_Name name 'FT_EE_UAWrite';
function FT_EE_UASize(ftHandle:DWord; UASize:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_EE_UASize';
 
// FT2232C, FT232BM and FT245BM Extended API Functions
function FT_GetLatencyTimer(ftHandle:Dword; Latency:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_GetLatencyTimer';
function FT_SetLatencyTimer(ftHandle:Dword; Latency:Byte):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetLatencyTimer';
function FT_GetBitMode(ftHandle:Dword; BitMode:Pointer):FT_Result; stdcall; External FT_DLL_Name name 'FT_GetBitMode';
function FT_SetBitMode(ftHandle:Dword; Mask,Enable:Byte):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetBitMode';
function FT_SetUSBParameters(ftHandle:Dword; InSize,OutSize:Dword):FT_Result; stdcall; External FT_DLL_Name name 'FT_SetUSBParameters';
 
 
Procedure FT_Error_Report(ErrStr: String; PortStatus : Integer);
Var Str : String;
Begin
If Not FT_Enable_Error_Report then Exit;
If PortStatus = FT_OK then Exit;
Case PortStatus of
    FT_INVALID_HANDLE : Str := ErrStr+' - Invalid handle...';
    FT_DEVICE_NOT_FOUND : Str := ErrStr+' - Device not found...';
    FT_DEVICE_NOT_OPENED : Str := ErrStr+' - Device not opened...';
    FT_IO_ERROR : Str := ErrStr+' - General IO error...';
    FT_INSUFFICIENT_RESOURCES : Str := ErrStr+' - Insufficient resources...';
    FT_INVALID_PARAMETER : Str := ErrStr+' - Invalid parameter...';
    FT_INVALID_BAUD_RATE : Str := ErrStr+' - Invalid baud rate...';
    FT_DEVICE_NOT_OPENED_FOR_ERASE : Str := ErrStr+' Device not opened for erase...';
    FT_DEVICE_NOT_OPENED_FOR_WRITE : Str := ErrStr+' Device not opened for write...';
    FT_FAILED_TO_WRITE_DEVICE : Str := ErrStr+' - Failed to write...';
    FT_EEPROM_READ_FAILED : Str := ErrStr+' - EEPROM read failed...';
    FT_EEPROM_WRITE_FAILED : Str := ErrStr+' - EEPROM write failed...';
    FT_EEPROM_ERASE_FAILED : Str := ErrStr+' - EEPROM erase failed...';
    FT_EEPROM_NOT_PRESENT : Str := ErrStr+' - EEPROM not present...';
    FT_EEPROM_NOT_PROGRAMMED : Str := ErrStr+' - EEPROM not programmed...';
    FT_INVALID_ARGS : Str := ErrStr+' - Invalid arguments...';
    FT_OTHER_ERROR : Str := ErrStr+' - Other error ...';
    End;
MessageDlg(Str, mtError, [mbOk], 0);
End;
 
 
Function GetDeviceString : String;
Var I : Integer;
Begin
Result := ''; I := 1;
FT_Device_String_Buffer[50] := Chr(0); // Just in case !
While FT_Device_String_Buffer[I] <> Chr(0) do
  Begin
  Result := Result + FT_Device_String_Buffer[I];
  Inc(I);
  End;
End;
 
 
Procedure SetDeviceString ( S : String );
Var I,L : Integer;
Begin
FT_Device_String_Buffer[1] := Chr(0);
L := Length(S);  If L > 49 then L := 49;
If L = 0 then Exit;
For I := 1 to L do FT_Device_String_Buffer[I] := S[I];
FT_Device_String_Buffer[L+1] := Chr(0);
End;
 
 
// FTD2XX functions from here
Function GetFTDeviceCount : FT_Result;
Begin
Result := FT_GetNumDevices(@FT_Device_Count,Nil,FT_LIST_NUMBER_ONLY);
If Result <> FT_OK then FT_Error_Report('GetFTDeviceCount',Result);
End;
 
Function GetFTDeviceSerialNo(DeviceIndex:DWord) : FT_Result;
Begin
Result := FT_ListDevices(DeviceIndex,@SerialNumber,(FT_OPEN_BY_SERIAL_NUMBER or FT_LIST_BY_INDEX));
If Result = FT_OK then FT_Device_String := SerialNumber;
If Result <> FT_OK then FT_Error_Report('GetFTDeviceSerialNo',Result);
End;
 
 
Function GetFTDeviceDescription(DeviceIndex:DWord) : FT_Result;
Begin
Result := FT_ListDevices(DeviceIndex,@Description,(FT_OPEN_BY_DESCRIPTION or FT_LIST_BY_INDEX));
If Result = FT_OK then FT_Device_String := Description;
If Result <> FT_OK then FT_Error_Report('GetFTDeviceDescription',Result);
End;
 
 
Function GetFTDeviceLocation(DeviceIndex:DWord) : FT_Result;
Begin
Result := FT_ListDevices(DeviceIndex,@LocID,(FT_OPEN_BY_LOCATION or FT_LIST_BY_INDEX));
If Result = FT_OK then FT_Device_Location := LocID;
If Result <> FT_OK then FT_Error_Report('GetFTDeviceLocation',Result);
End;
 
 
Function Open_USB_Device : FT_Result;
Var
  DevIndex : DWord;
Begin
DevIndex := 0;
Result := FT_Open(DevIndex,@FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_Open',Result);
End;
 
 
Function Open_USB_Device_By_Serial_Number(Serial_Number:string) : FT_Result;
Begin
SetDeviceString(Serial_Number);
Result := FT_OpenEx(@FT_Device_String_Buffer,FT_OPEN_BY_SERIAL_NUMBER,@FT_Handle);
If Result <> FT_OK then FT_Error_Report('Open_USB_Device_By_Serial_Number',Result);
End;
 
 
Function Open_USB_Device_By_Device_Description(Device_Description:string) : FT_Result;
Begin
SetDeviceString(Device_Description);
Result := FT_OpenEx(@FT_Device_String_Buffer,FT_OPEN_BY_DESCRIPTION,@FT_Handle);
If Result <> FT_OK then FT_Error_Report('Open_USB_Device_By_Device_Description',Result);
End;
 
 
Function Open_USB_Device_By_Device_Location(Location:DWord) : FT_Result;
Begin
Result := FT_OpenByLocation(Location,FT_OPEN_BY_LOCATION,@FT_Handle);
If Result <> FT_OK then FT_Error_Report('Open_USB_Device_By_Device_Location',Result);
End;
 
 
Function Close_USB_Device : FT_Result;
Begin
Result :=  FT_Close(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_Close',Result);
End;
 
 
function Read_USB_Device_Buffer( Read_Count : Integer ) : Integer;
// Reads Read_Count Bytes (or less) from the USB device to the FT_In_Buffer
// Function returns the number of bytes actually received  which may range from zero
// to the actual number of bytes requested, depending on how many have been received
// at the time of the request + the read timeout value.
Var Read_Result : Integer;
Begin
 
if (read_count = 1) then
  begin
  read_result := read_count;
  end;
FT_IO_Status := FT_Read(FT_Handle,@FT_In_Buffer,Read_Count,@Read_Result);
If FT_IO_Status <> FT_OK then FT_Error_Report('FT_Read',FT_IO_Status);
Result := Read_Result;
End;
 
 
function Write_USB_Device_Buffer( Write_Count : Integer ) : Integer;
// Writes Write_Count Bytes from FT_Out_Buffer to the USB device
// Function returns the number of bytes actually sent
// In this example, Write_Count should be 32k bytes max
Var Write_Result : Integer;
Begin
FT_IO_Status := FT_Write(FT_Handle,@FT_Out_Buffer,Write_Count,@Write_Result);
If FT_IO_Status <> FT_OK then FT_Error_Report('FT_Write',FT_IO_Status);
Result := Write_Result;
End;
 
 
Function Reset_USB_Device : FT_Result;
Begin
Result :=  FT_ResetDevice(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_ResetDevice',Result);
End;
 
 
Function Set_USB_Device_BaudRate : FT_Result;
Begin
Result :=  FT_SetBaudRate(FT_Handle,FT_Current_Baud);
If Result <> FT_OK then FT_Error_Report('FT_SetBaudRate',Result);
End;
 
 
Function Set_USB_Device_BaudRate_Divisor(Divisor:Dword) : FT_Result;
Begin
Result :=  FT_SetDivisor(FT_Handle,Divisor);
If Result <> FT_OK then FT_Error_Report('FT_SetDivisor',Result);
End;
 
 
Function Set_USB_Device_DataCharacteristics : FT_Result;
Begin
Result :=  FT_SetDataCharacteristics(FT_Handle,FT_Current_DataBits,FT_Current_StopBits,FT_Current_Parity);
If Result <> FT_OK then FT_Error_Report('FT_SetDataCharacteristics',Result);
End;
 
 
Function Set_USB_Device_FlowControl : FT_Result;
Begin
Result :=  FT_SetFlowControl(FT_Handle,FT_Current_FlowControl,FT_XON_Value,FT_XOFF_Value);
If Result <> FT_OK then FT_Error_Report('FT_SetFlowControl',Result);
End;
 
 
Function Set_USB_Device_RTS : FT_Result;
Begin
Result :=  FT_SetRTS(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_SetRTS',Result);
End;
 
 
Function Clr_USB_Device_RTS : FT_Result;
Begin
Result :=  FT_ClrRTS(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_ClrRTS',Result);
End;
 
 
Function Set_USB_Device_DTR : FT_Result;
Begin
Result :=  FT_SetDTR(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_SetDTR',Result);
End;
 
 
Function Clr_USB_Device_DTR : FT_Result;
Begin
Result :=  FT_ClrDTR(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_ClrDTR',Result);
End;
 
 
Function Get_USB_Device_ModemStatus : FT_Result;
Begin
Result :=  FT_GetModemStatus(FT_Handle,@FT_Modem_Status);
If Result <> FT_OK then FT_Error_Report('FT_GetModemStatus',Result);
End;
 
 
Function Set_USB_Device_Chars : FT_Result;
Var Events_On,Errors_On : Byte;
Begin
If FT_Event_On then Events_On := 1 else Events_On := 0;
If FT_Error_On then Errors_On := 1 else Errors_On := 0;
Result :=  FT_SetChars(FT_Handle,FT_EVENT_Value,Events_On,FT_ERROR_Value,Errors_On);
If Result <> FT_OK then FT_Error_Report('FT_SetChars',Result);
End;
 
 
Function Purge_USB_Device_Out : FT_Result;
Begin
Result :=  FT_Purge(FT_Handle,FT_PURGE_RX);
If Result <> FT_OK then FT_Error_Report('FT_Purge RX',Result);
End;
 
Function Purge_USB_Device_In : FT_Result;
Begin
Result :=  FT_Purge(FT_Handle,FT_PURGE_TX);
If Result <> FT_OK then FT_Error_Report('FT_Purge TX',Result);
End;
 
 
Function Set_USB_Device_TimeOuts(ReadTimeOut,WriteTimeOut:DWord) : FT_Result;
Begin
Result :=  FT_SetTimeouts(FT_Handle,ReadTimeout,WriteTimeout);
If Result <> FT_OK then FT_Error_Report('FT_SetTimeouts',Result);
End;
 
 
Function Get_USB_Device_QueueStatus : FT_Result;
Begin
Result :=  FT_GetQueueStatus(FT_Handle,@FT_Q_Bytes);
If Result <> FT_OK then FT_Error_Report('FT_GetQueueStatus',Result);
End;
 
 
Function Set_USB_Device_Break_On : FT_Result;
Begin
Result :=  FT_SetBreakOn(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_SetBreakOn',Result);
End;
 
 
Function Set_USB_Device_Break_Off : FT_Result;
Begin
Result :=  FT_SetBreakOff(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_SetBreakOff',Result);
End;
 
 
Function Get_USB_Device_Status : FT_Result;
Begin
Result :=  FT_GetStatus(FT_Handle, @FT_Q_Bytes, @FT_TxQ_Bytes, @FT_Event_Status);
If Result <> FT_OK then FT_Error_Report('FT_GetStatus',Result);
End;
 
 
Function Set_USB_Device_Event_Notification(EventMask:DWord) : FT_Result;
Begin
Result := FT_SetEventNotification(FT_Handle,EventMask,FT_Event_Handle);
If Result <> FT_OK then FT_Error_Report('FT_SetEventNotification ',Result);
End;
 
 
Function USB_FT_GetDeviceInfo(DevType,ID:DWord; SerialNumber,Description:array of char) : FT_Result;
begin
Result := FT_GetDeviceInfo(FT_Handle,@DevType,@ID,@SerialNumber,@Description,Nil);
If Result <> FT_OK then FT_Error_Report('FT_GetDeviceInfo ',Result);
end;
 
 
Function Set_USB_Device_Reset_Pipe_Retry_Count(RetryCount:DWord) : FT_Result;
Begin
Result :=  FT_SetResetPiperetryCount(FT_Handle, RetryCount);
If Result <> FT_OK then FT_Error_Report('FT_SetResetPipeRetryCount',Result);
End;
 
 
Function Stop_USB_Device_InTask : FT_Result;
Begin
Result :=  FT_StopInTask(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_StopInTask',Result);
End;
 
 
Function Restart_USB_Device_InTask : FT_Result;
Begin
Result :=  FT_RestartInTask(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_RestartInTask',Result);
End;
 
 
Function Reset_USB_Port : FT_Result;
Begin
Result :=  FT_ResetPort(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_ResetPort',Result);
End;
 
 
Function Cycle_USB_Port : FT_Result;
Begin
Result :=  FT_CyclePort(FT_Handle);
If Result <> FT_OK then FT_Error_Report('FT_CyclePort',Result);
End;
 
 
Function Create_USB_Device_List : FT_Result;
Begin
Result :=  FT_CreateDeviceInfoList(@FT_Device_Count);
If Result <> FT_OK then FT_Error_Report('FT_CreateDeviceInfoList',Result);
End;
 
 
Function Get_USB_Device_List : FT_Result;
Begin
SetLength(FT_DeviceInfoList,FT_Device_Count);
Result :=  FT_GetDeviceInfoList(FT_DeviceInfoList, @FT_Device_Count);
If Result <> FT_OK then FT_Error_Report('FT_GetDeviceInfoList',Result);
End;
 
Function Get_USB_Driver_Version(DrVersion : TDWordPtr) : FT_Result;
Begin
   Result :=  FT_GetDriverVersion(FT_Handle, DrVersion);
   If Result <> FT_OK then FT_Error_Report('FT_GetDriverVersion',Result);
End;
 
Function Get_USB_Library_Version(LbVersion : TDWordPtr) : FT_Result;
Begin
   Result :=  FT_GetLibraryVersion(LbVersion);
   If Result <> FT_OK then FT_Error_Report('FT_GetLibraryVersion',Result);
End;
 
 
Function Get_USB_Device_List_Detail(Index:DWord) : FT_Result;
Begin
// Initialise structure
USB_Device_Info_Node.Flags := 0;
USB_Device_Info_Node.DeviceType := 0;
USB_Device_Info_Node.ID := 0;
USB_Device_Info_Node.LocID := 0;
USB_Device_Info_Node.SerialNumber := '';
USB_Device_Info_Node.Description := '';
USB_Device_Info_Node.DeviceHandle := 0;
Result := FT_GetDeviceInfoDetail(Index,@USB_Device_Info_Node.Flags,@USB_Device_Info_Node.DeviceType,
    @USB_Device_Info_Node.ID,@USB_Device_Info_Node.LocID,@USB_Device_Info_Node.SerialNumber,
    @USB_Device_Info_Node.Description,@USB_Device_Info_Node.DeviceHandle);
If Result <> FT_OK then FT_Error_Report('FT_GetDeviceInfoListDetail',Result);
End;
 
 
function USB_FT_EE_Read : FT_Result;
// Read BM/AM device EEPROM
begin
EEDataBuffer.Signature1 := 0;
EEDataBuffer.Signature2 := $FFFFFFFF;
EEDataBuffer.Version := 0;  // 0 for AM/BM, 1 for C, 2 for R
EEDataBuffer.VendorId :=0;
EEDataBuffer.ProductId := 0;
EEDataBuffer.Manufacturer := @Manufacturer;
EEDataBuffer.ManufacturerId := @ManufacturerId;
EEDataBuffer.Description := @Description;
EEDataBuffer.SerialNumber := @SerialNumber;
EEDataBuffer.MaxPower := 0;
EEDataBuffer.PnP := 0;
EEDataBuffer.SelfPowered := 0;
EEDataBuffer.RemoteWakeup := 0;
EEDataBuffer.Rev4 := 0;
EEDataBuffer.IsoIn := 0;
EEDataBuffer.IsoOut := 0;
EEDataBuffer.PullDownEnable := 0;
EEDataBuffer.SerNumEnable := 0;
EEDataBuffer.USBVersionEnable := 0;
EEDataBuffer.USBVersion := 0;
// FT2232C Extensions
EEDataBuffer.Rev5 := 0;
EEDataBuffer.IsoInA := 0;
EEDataBuffer.IsoInB := 0;
EEDataBuffer.IsoOutA := 0;
EEDataBuffer.IsoOutB := 0;
EEDataBuffer.PullDownEnable5 := 0;
EEDataBuffer.SerNumEnable5 := 0;
EEDataBuffer.USBVersionEnable5 := 0;
EEDataBuffer.USBVersion5 := 0;
EEDataBuffer.AIsHighCurrent := 0;
EEDataBuffer.BIsHighCurrent := 0;
EEDataBuffer.IFAIsFifo := 0;
EEDataBuffer.IFAIsFifoTar := 0;
EEDataBuffer.IFAIsFastSer := 0;
EEDataBuffer.AIsVCP := 0;
EEDataBuffer.IFBIsFifo := 0;
EEDataBuffer.IFBIsFifoTar := 0;
EEDataBuffer.IFBIsFastSer := 0;
EEDataBuffer.BIsVCP := 0;
// FT232R extensions
EEDataBuffer.UseExtOsc := 0;
EEDataBuffer.HighDriveIOs := 0;
EEDataBuffer.EndpointSize := 0;
EEDataBuffer.PullDownEnableR := 0;
EEDataBuffer.SerNumEnableR := 0;
EEDataBuffer.InvertTXD := 0;
EEDataBuffer.InvertRXD := 0;
EEDataBuffer.InvertRTS := 0;
EEDataBuffer.InvertCTS := 0;
EEDataBuffer.InvertDTR := 0;
EEDataBuffer.InvertDSR := 0;
EEDataBuffer.InvertDCD := 0;
EEDataBuffer.InvertRI := 0;
EEDataBuffer.Cbus0 := 0;
EEDataBuffer.Cbus1 := 0;
EEDataBuffer.Cbus2 := 0;
EEDataBuffer.Cbus3 := 0;
EEDataBuffer.Cbus4 := 0;
EEDataBuffer.RIsVCP := 0;
Result :=  FT_EE_Read(FT_Handle,@EEDataBuffer);
If Result <> FT_OK then FT_Error_Report('FT_EE_Read ',Result);
end;
 
 
function USB_FT_C_EE_Read : FT_Result;
// Read FT2232C device EEPROM
begin
EEDataBuffer.Signature1 := 0;
EEDataBuffer.Signature2 := $FFFFFFFF;
EEDataBuffer.Version := 1;  // 0 for AM/BM, 1 for C, 2 for R
EEDataBuffer.VendorId :=0;
EEDataBuffer.ProductId := 0;
EEDataBuffer.Manufacturer := @Manufacturer;
EEDataBuffer.ManufacturerId := @ManufacturerId;
EEDataBuffer.Description := @Description;
EEDataBuffer.SerialNumber := @SerialNumber;
EEDataBuffer.MaxPower := 0;
EEDataBuffer.PnP := 0;
EEDataBuffer.SelfPowered := 0;
EEDataBuffer.RemoteWakeup := 0;
EEDataBuffer.Rev4 := 0;
EEDataBuffer.IsoIn := 0;
EEDataBuffer.IsoOut := 0;
EEDataBuffer.PullDownEnable := 0;
EEDataBuffer.SerNumEnable := 0;
EEDataBuffer.USBVersionEnable := 0;
EEDataBuffer.USBVersion := 0;
// FT2232C Extensions
EEDataBuffer.Rev5 := 0;
EEDataBuffer.IsoInA := 0;
EEDataBuffer.IsoInB := 0;
EEDataBuffer.IsoOutA := 0;
EEDataBuffer.IsoOutB := 0;
EEDataBuffer.PullDownEnable5 := 0;
EEDataBuffer.SerNumEnable5 := 0;
EEDataBuffer.USBVersionEnable5 := 0;
EEDataBuffer.USBVersion5 := 0;
EEDataBuffer.AIsHighCurrent := 0;
EEDataBuffer.BIsHighCurrent := 0;
EEDataBuffer.IFAIsFifo := 0;
EEDataBuffer.IFAIsFifoTar := 0;
EEDataBuffer.IFAIsFastSer := 0;
EEDataBuffer.AIsVCP := 0;
EEDataBuffer.IFBIsFifo := 0;
EEDataBuffer.IFBIsFifoTar := 0;
EEDataBuffer.IFBIsFastSer := 0;
EEDataBuffer.BIsVCP := 0;
// FT232R extensions
EEDataBuffer.UseExtOsc := 0;
EEDataBuffer.HighDriveIOs := 0;
EEDataBuffer.EndpointSize := 0;
EEDataBuffer.PullDownEnableR := 0;
EEDataBuffer.SerNumEnableR := 0;
EEDataBuffer.InvertTXD := 0;
EEDataBuffer.InvertRXD := 0;
EEDataBuffer.InvertRTS := 0;
EEDataBuffer.InvertCTS := 0;
EEDataBuffer.InvertDTR := 0;
EEDataBuffer.InvertDSR := 0;
EEDataBuffer.InvertDCD := 0;
EEDataBuffer.InvertRI := 0;
EEDataBuffer.Cbus0 := 0;
EEDataBuffer.Cbus1 := 0;
EEDataBuffer.Cbus2 := 0;
EEDataBuffer.Cbus3 := 0;
EEDataBuffer.Cbus4 := 0;
EEDataBuffer.RIsVCP := 0;
Result :=  FT_EE_Read(FT_Handle,@EEDataBuffer);
If Result <> FT_OK then FT_Error_Report('FT_EE_Read ',Result);
end;
 
 
function USB_FT_R_EE_Read : FT_Result;
// Read FT232R device EEPROM
begin
EEDataBuffer.Signature1 := 0;
EEDataBuffer.Signature2 := $FFFFFFFF;
EEDataBuffer.Version := 2;  // 0 for AM/BM, 1 for C, 2 for R
EEDataBuffer.VendorId :=0;
EEDataBuffer.ProductId := 0;
EEDataBuffer.Manufacturer := @Manufacturer;
EEDataBuffer.ManufacturerId := @ManufacturerId;
EEDataBuffer.Description := @Description;
EEDataBuffer.SerialNumber := @SerialNumber;
EEDataBuffer.MaxPower := 0;
EEDataBuffer.PnP := 0;
EEDataBuffer.SelfPowered := 0;
EEDataBuffer.RemoteWakeup := 0;
EEDataBuffer.Rev4 := 0;
EEDataBuffer.IsoIn := 0;
EEDataBuffer.IsoOut := 0;
EEDataBuffer.PullDownEnable := 0;
EEDataBuffer.SerNumEnable := 0;
EEDataBuffer.USBVersionEnable := 0;
EEDataBuffer.USBVersion := 0;
// FT2232C Extensions
EEDataBuffer.Rev5 := 0;
EEDataBuffer.IsoInA := 0;
EEDataBuffer.IsoInB := 0;
EEDataBuffer.IsoOutA := 0;
EEDataBuffer.IsoOutB := 0;
EEDataBuffer.PullDownEnable5 := 0;
EEDataBuffer.SerNumEnable5 := 0;
EEDataBuffer.USBVersionEnable5 := 0;
EEDataBuffer.USBVersion5 := 0;
EEDataBuffer.AIsHighCurrent := 0;
EEDataBuffer.BIsHighCurrent := 0;
EEDataBuffer.IFAIsFifo := 0;
EEDataBuffer.IFAIsFifoTar := 0;
EEDataBuffer.IFAIsFastSer := 0;
EEDataBuffer.AIsVCP := 0;
EEDataBuffer.IFBIsFifo := 0;
EEDataBuffer.IFBIsFifoTar := 0;
EEDataBuffer.IFBIsFastSer := 0;
EEDataBuffer.BIsVCP := 0;
// FT232R extensions
EEDataBuffer.UseExtOsc := 0;
EEDataBuffer.HighDriveIOs := 0;
EEDataBuffer.EndpointSize := 0;
EEDataBuffer.PullDownEnableR := 0;
EEDataBuffer.SerNumEnableR := 0;
EEDataBuffer.InvertTXD := 0;
EEDataBuffer.InvertRXD := 0;
EEDataBuffer.InvertRTS := 0;
EEDataBuffer.InvertCTS := 0;
EEDataBuffer.InvertDTR := 0;
EEDataBuffer.InvertDSR := 0;
EEDataBuffer.InvertDCD := 0;
EEDataBuffer.InvertRI := 0;
EEDataBuffer.Cbus0 := 0;
EEDataBuffer.Cbus1 := 0;
EEDataBuffer.Cbus2 := 0;
EEDataBuffer.Cbus3 := 0;
EEDataBuffer.Cbus4 := 0;
EEDataBuffer.RIsVCP := 0;
Result :=  FT_EE_Read(FT_Handle,@EEDataBuffer);
If Result <> FT_OK then FT_Error_Report('FT_EE_Read ',Result);
end;
 
 
function USB_FT_EE_Program : FT_Result;
begin
Result := FT_EE_Program(FT_Handle, @EEDataBuffer);
If Result <> FT_OK then FT_Error_Report('FT_EE_Read ',Result);
end;
 
 
function USB_FT_WriteEE(WordAddr:Dword; WordData:Word) : FT_Result;
begin
Result := FT_WriteEE(FT_Handle,WordAddr,WordData);
end;
 
 
function USB_FT_ReadEE(WordAddr:Dword) : FT_Result;
begin
Result := FT_ReadEE(FT_Handle,WordAddr,@WordRead);
end;
 
 
function USB_FT_EraseEE : FT_Result;
begin
Result := FT_EraseEE(FT_Handle);
end;
 
 
function USB_FT_EE_UARead : FT_Result;
begin
Result :=  FT_EE_UARead(FT_Handle,@UserData,64,@FT_UA_Size);
If Result <> FT_OK then FT_Error_Report('FT_EE_UARead ',Result);
end;
 
 
function USB_FT_EE_UAWrite : FT_Result;
begin
Result :=  FT_EE_UAWrite(FT_Handle,@UserData,FT_UA_Size);
If Result <> FT_OK then FT_Error_Report('FT_EE_UAWrite ',Result);
end;
 
 
function USB_FT_EE_UASize : FT_Result;
begin
Result :=  FT_EE_UASize(FT_Handle,@FT_UA_Size);
If Result <> FT_OK then FT_Error_Report('FT_EE_UASize ',Result);
end;
 
 
Function Get_USB_Device_LatencyTimer : FT_Result;
Begin
Result := FT_GetLatencyTimer(FT_Handle,@FT_LatencyRd);
If Result <> FT_OK then FT_Error_Report('FT_GetLatencyTimer ',Result);
End;
 
 
Function Set_USB_Device_LatencyTimer(Latency:Byte) : FT_Result;
Begin
Result :=  FT_SetLatencyTimer(FT_Handle, Latency);
If Result <> FT_OK then FT_Error_Report('FT_SetLatencyTimer ',Result);
End;
 
 
Function Get_USB_Device_BitMode(var BitMode:Byte) : FT_Result;
Begin
Result := FT_GetBitMode(FT_Handle,@BitMode);
If Result <> FT_OK then FT_Error_Report('FT_GetBitMode ',Result);
End;
 
 
Function Set_USB_Device_BitMode(Mask,Enable:Byte) : FT_Result ;
Begin
Result := FT_SetBitMode(FT_Handle,Mask,Enable);
If Result <> FT_OK then FT_Error_Report('FT_SetBitMode ',Result);
End;
 
 
Function Set_USB_Parameters(InSize,OutSize:Dword) : FT_Result ;
Begin
Result :=  FT_SetUSBParameters(FT_Handle,InSize,OutSize);
If Result <> FT_OK then FT_Error_Report('FT_SetUSBParameters ',Result);
End;
 
 
End.

Maintenant que l'on a des infos, Google trouve pour nous toute sorte de chose : https://forum.gsmhosting.com/vbb/5862450-post11.html

En commençant par l'exemple utilisant GetFTDeviceCount et GetFTDeviceSerialNo + GetFTDeviceDescription pour l'afficher dans une ComboBox, clairement la base dans le cadre du Discovery
Une fois les modules identifiés, faut étudier le reste du code pour émettre et recevoir des données.

A priori, c'est un module à la fois via le buffer FT_Out_Buffer et Write_USB_Device_Buffer, ça envoie des données au FT200XD maintenant comment interagir avec les MCP23017, effectivement, un composant TComPort semble pouvoir être couplé selon le premier exemple, il va falloir chercher mais on trouve très vite ceci https://ftdichip.com/wp-content/uplo...mers_Guide.pdf

Citation:

Si j'ai bien compris, on utilise un port RS232 qui s'occupe de la communication entre le PC et la clef.

ce que je voulait dire qu'il est possible de reléguer cette opération à un microcontrôleur intermédiaire qui pilote les deux MCP23017 et d'établir une liaison rs232 entre le PC et le microcontrôleur pour lire et écrire les commandes

Citation:

J'ai recherché un bouquin sur les communications I2C mais je n'ai rien trouvé de très concluant.

J'ai des doutes que ça puisse aboutir avec ce circuit..si j'ai bien compris le data sheet du FT200XD qui indique que ce circuit ne peut se connecter au bus qu'en tant que slave et son rôle se limite à répondre aux demandes du maitre de bus cela veut dire qu'il ne pourra pas contrôler le bus I2C comme tu l’espères.

Citation:

FT200XD USB I2C SLAVE IC Datasheet
The FT200XD device only operates as a slave, and is capable of speeds up to 3.4MBit/s.

https://ftdichip.com/wp-content/uplo...DS_FT200XD.pdf

Bonsoir à tous

D'après le dernier commentaire, je n'ai pas pris de quoi commander mes deux périphériques. Est ce que quelqu'un sait quelle carte je pourrais prendre pour faire de mon PC un Master I2C ?

Merci pour toute votre aide et de vos précieux conseils

Regarder dans cette discussion qui aborde le sujet avec PCF8574 qui a le même fonctionnement que MCP23017 même adresse I2C sauf qu'elle supporte qu'un seul port

https://www.developpez.net/forums/d1...232rl-pcf8574/

c'est dans la section embarqué qu'il poser cette question pour avoir plus de chance d'obtenier une réponse
http://www.developpez.net/forums/f15...teme/embarque/