概述

D2XX驱动提供了两个函数用于查询和设置FT2232的不同器件IO模式。

FT_SetBitMode
FT_GetBitMode

`FT_SetBitMode`

FT_STATUS FT_SetBitMode( FT_HANDLE ftHandle, UCHAR ucMask, UCHAR ucMode)

ftHandle：句柄
ucMask：用于控制GPIO的方向，即输入还是输出；0表示对应GPIO为输入，1表示对应GPIO为输出
ucMode：设置IO Mode

IO Mode	Value(hex)
Reset the IO Bit Mode	0x0
Asynchronous Bit Bang Mode	0x1
MPSSE	0x2
Synchronous Bit Bang Mode	0x4
MCU Host Bus Emulation	0x8
Fast Serial For Opto-Isolation	0x10

`FT_SetBitMode`例程

设置MPSSE

HANDLE ftHandle; 			// valid handle returned from FT_Open or FT_W32_CreateFile
FT_STATUS ftStatus;
UCHAR Mask = 0xff; 			// set all IOs to output
UCHAR Mode = 2; 			// set MPSSE mode
ftStatus = FT_SetBitMode(ftHandle,Mask,Mode);

if (ftStatus == FT_OK) {
	// MPSSE Mode enabled
}
else {
	// FT_SetBitMode FAILED!
}

设置Asynchronous Bit Bang Mode

HANDLE ftHandle; // valid handle returned from FT_Open or FT_W32_CreateFile
FT_STATUS ftStatus;
UCHAR Mask = 0x07; // set bits 0, 1 and 2 to output
UCHAR Mode = 1; // set Asynchronous Bit Bang mode
ftStatus = FT_SetBitMode(ftHandle,Mask,Mode);
if (ftStatus == FT_OK) {
// Asynchronous Bit bang Mode enabled
}
else {
// FT_SetBitMode FAILED!
}

Reset IO Bit Mode

ftStatus = FT_SetBitMode(ftHandle,0,0);

设置Synchrounous Bit Bang mode

HANDLE ftHandle; // valid handle returned from FT_Open or FT_W32_CreateFile
FT_STATUS ftStatus;
UCHAR Mask = 0x07; // set bits 0, 1 and 2 to output
UCHAR Mode = 0x4; // set Synchronous Bit Bang mode
ftStatus = FT_SetBitMode(ftHandle,Mask,Mode);
if (ftStatus == FT_OK) {
// Asynchronous Bit bang Mode enabled
}
else {
// FT_SetBitMode FAILED!
}

设置MCU Host Bus Emulation mode

...
```## Reset IO Bit Mode
```Reset IO Bit Mode
HANDLE ftHandle; // valid handle returned from FT_Open or FT_W32_CreateFile
FT_STATUS ftStatus;
UCHAR Mask = 0x07; // set bits 0, 1 and 2 to output
UCHAR Mode = 0x8; // set MCU Host Bus Emulation mode
ftStatus = FT_SetBitMode(ftHandle,Mask,Mode);
if (ftStatus == FT_OK) {
// Asynchronous Bit bang Mode enabled
}
else {
// FT_SetBitMode FAILED!
}

`FT_GetBitMode`

获取IO Bit Mode状态

FT_STATUS FT_GetBitMode (FT_HANDLE ftHandle, PUCHAR pucMode)
参数
ftHandle：器件句柄
pucMode：指针，用于存储Bit Mode值

`FT_GetBitMode`例程

HANDLE ftHandle; // valid handle returned from FT_Open or FT_W32_CreateFile
UCHAR BitMode;
FT_STATUS ftStatus;
ftStatus = FT_GetBitMode(ftHandle,&BitMode);
if (ftStatus == FT_OK) {
// BitMode contains current value
}
else {
// FT_GetBitMode FAILED!
}