ftdi

package module
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 Go to latest Published: Feb 5, 2021 License: BSD-3-Clause Imports: 6 Imported by: 28

README

Go bindings for libFTDI (http://www.intra2net.com/en/developer/libftdi/)

documentation

Documentation

Overview

Go binding for libFTDI library http://http://www.intra2net.com/en/developer/libftdi/

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Break 

type Break int

Break represents the break mode 

const (
	// BreakOff disables the use of a break signal
	BreakOff Break = C.BREAK_OFF
	// BreakOn enables the use of a break signal
	BreakOn Break = C.BREAK_ON
)

type CBusFunction 

type CBusFunction byte
const (
	CBusTxEn CBusFunction = iota
	CBusPwrEn
	CBusRxLED
	CBusTxLED
	CBusTxRxLED
	CBusSleep
	CBusClk48
	CBusClk24
	CBusClk12
	CBusClk6
	CBusIOMode
	CBusBBWR
	CBusBBRD
)

func (CBusFunction) String 

func (c CBusFunction) String() string

type Channel 

type Channel uint32

Channel represents channel (interface) of FTDI device. Some devices have more than one channel (eg. FT2232 has 2 channels, FT4232 has 4 channels). 

const (
	ChannelAny Channel = iota
	ChannelA
	ChannelB
	ChannelC
	ChannelD
)

type ChannelType 

type ChannelType byte
const (
	ChannelUART ChannelType = iota
	ChannelFIFO
	ChannelOPTO
	ChannelCPU
	ChannelFT1284
)

func (ChannelType) String 

func (ct ChannelType) String() string

type DataBits 

type DataBits int

DataBits represents the number of data bits to expect 

const (
	// DataBits7 indicates that 7 data bits are used
	DataBits7 DataBits = C.BITS_7
	// DataBits8 indicates that 8 data bits are used
	DataBits8 DataBits = C.BITS_8
)

type Device 

type Device struct {
	// contains filtered or unexported fields
}

Device represents FTDI device.

func Open 

func Open(vendor, product int, description, serial string, index uint,
	c Channel) (*Device, error)

Open opens the index-th device with a given vendor id, product id, description and serial. Uses specified channel c.

func OpenFirst 

func OpenFirst(vendor, product int, c Channel) (*Device, error)

OpenFirst opens the first device with a given vendor and product ids. Uses specified channel c.

func OpenUSBDev 

func OpenUSBDev(u *USBDev, c Channel) (*Device, error)

OpenUSBDev opens channel (interface) c of USB device u. u must be FTDI device.

func (*Device) ChipID 

func (d *Device) ChipID() (uint32, error)

ChipID reads FTDI Chip-ID (not all devices support this).

func (*Device) Close 

func (d *Device) Close() error

Close closes device

func (*Device) EEPROM 

func (d *Device) EEPROM() EEPROM

EEPROM returns a handler to the device internal EEPROM subsystem.

func (*Device) LatencyTimer 

func (d *Device) LatencyTimer() (int, error)

LatencyTimer returns latency timer value [ms].

func (*Device) Pins 

func (d *Device) Pins() (b byte, err error)

Pins returns current state of pins (circumventing the read buffer).

func (*Device) PurgeBuffers 

func (d *Device) PurgeBuffers() error

PurgeBuffers clears both (Tx and Rx) buffers.

func (*Device) PurgeReadBuffer 

func (d *Device) PurgeReadBuffer() error

PurgeReadBuffer clears Tx buffer (buffer for data that will be sent to USB?).

func (*Device) PurgeWriteBuffer 

func (d *Device) PurgeWriteBuffer() error

PurgeWriteBuffer clears Rx buffer (buffer for data received from USB?).

func (*Device) Read 

func (d *Device) Read(data []byte) (int, error)

Read reads data from device to data. It returns number of bytes read.

func (*Device) ReadByte 

func (d *Device) ReadByte() (byte, error)

ReadByte reads one byte from device.

func (*Device) ReadChunkSize 

func (d *Device) ReadChunkSize() (int, error)

ReadChunkSize returns current value of read buffer chunk size.

func (*Device) Reset 

func (d *Device) Reset() error

Reset resets device d.

func (*Device) SetBaudrate 

func (d *Device) SetBaudrate(br int) error

SetBaudrate sets the rate of data transfer.

For standard USB-UART adapter it sets UART baudrate.

For bitbang mode the clock is actually 16 times the br. From the FTDI documentation for FT232R bitbang mode: "The clock for the Asynchronous Bit Bang mode is actually 16 times the Baud rate. A value of 9600 Baud would transfer the data at (9600x16) = 153600 bytes per second, or 1 every 6.5 μS."

FT232R suports baudrates from 183.1 baud to 3 Mbaud but for real applications it should be <= 1 Mbaud: Actual baudrate is set to discrete value that satisfies the equation br = 3000000 / (n + x) where n can be an integer between 2 and 16384 and x can be a sub-integer of the value 0, 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, or 0.875. When n == 1 then x should be 0, i.e. baud rate divisors with values between 1 and 2 are not possible.

func (*Device) SetBitmode 

func (d *Device) SetBitmode(iomask byte, mode Mode) error

SetBitmode sets operation mode for device d to mode. iomask bitmask configures lines corresponding to its bits as input (bit=0) or output (bit=1).

func (*Device) SetDTR 

func (d *Device) SetDTR(dtr int) error

SetDTR manually sets the DTR output line from the least significant bit of dtr.

func (*Device) SetDTRRTS 

func (d *Device) SetDTRRTS(dtr, rts int) error

SetDTRRTS manually sets the DTR and RTS output lines from the least significant bit of dtr and rts.

func (*Device) SetFlowControl 

func (d *Device) SetFlowControl(flowctrl FlowCtrl) error

SetFlowControl sets the flow control parameter

func (*Device) SetLatencyTimer 

func (d *Device) SetLatencyTimer(lt int) error

SetLatencyTimer sets latency timer to lt (value beetwen 1 and 255). If FTDI device has fewer data to completely fill one USB packet (<62 B) it waits for lt ms before sending data to USB.

func (*Device) SetLineProperties 

func (d *Device) SetLineProperties(bits DataBits, stopbits StopBits, parity Parity) error

SetLineProperties sets the uart data bit count, stop bits count, and parity mode

func (*Device) SetLineProperties2 

func (d *Device) SetLineProperties2(bits DataBits, stopbits StopBits, parity Parity, breaks Break) error

SetLineProperties2 sets the uart data bit count, stop bits count, parity mode, and break usage

func (*Device) SetRTS 

func (d *Device) SetRTS(rts int) error

SetRTS manually sets the RTS output line from the least significant bit of rts.

func (*Device) SetReadChunkSize 

func (d *Device) SetReadChunkSize(cs int) error

SetReadChunkSize configure read chunk size for device (default is 4096B) and size of software buffer dedicated for reading data from device...

func (*Device) SetWriteChunkSize 

func (d *Device) SetWriteChunkSize(cs int) error

SetWriteChunkSize configure write chunk size (default is 4096). If more than cs bytes need to be send to device, they will be split to chunks of size cs.

func (*Device) SubmitRead 

func (d *Device) SubmitRead(data []byte) (*Transfer, error)

func (*Device) SubmitWrite 

func (d *Device) SubmitWrite(data []byte) (*Transfer, error)

func (*Device) Type 

func (d *Device) Type() Type

Type returns type of device d.

func (*Device) Write 

func (d *Device) Write(data []byte) (int, error)

Write writes data from buf to device. It retruns number of bytes written.

func (*Device) WriteByte 

func (d *Device) WriteByte(b byte) error

WriteByte writes one byte to device.

func (*Device) WriteChunkSize 

func (d *Device) WriteChunkSize() (int, error)

WriteChunkSize returns current value of write chunk size.

func (*Device) WriteString 

func (d *Device) WriteString(s string) (int, error)

WriteString writes bytes from string s to device. It retruns number of bytes written.

type EEPROM 

type EEPROM struct {
	// contains filtered or unexported fields
}

func (EEPROM) Build 

func (e EEPROM) Build() error

func (EEPROM) CBusFunction 

func (e EEPROM) CBusFunction(n int) CBusFunction

func (EEPROM) ChannelDriver 

func (e EEPROM) ChannelDriver(c Channel) bool

ChannelDriver returns true if c channel has a driver. c can be from range: ChannelA - ChannelD

func (EEPROM) ChannelRS485 

func (e EEPROM) ChannelRS485(c Channel) bool

ChannelDriver returns true if c is RS485 channel. c can be from range: ChannelA - ChannelD

func (EEPROM) ChannelType 

func (e EEPROM) ChannelType(c Channel) ChannelType

ChannelType returns type of c channel. c can be: ChannelA, ChannelB

func (EEPROM) ChipSize 

func (e EEPROM) ChipSize() int

func (EEPROM) ChipType 

func (e EEPROM) ChipType() byte

func (EEPROM) Decode 

func (e EEPROM) Decode() error

func (EEPROM) HighCurrent 

func (e EEPROM) HighCurrent(c Channel) bool

ChannelDriver returns true if c channel is in high current mode . c can be from range: ChannAny - ChannelD (use ChannAny for TypeR device).

func (EEPROM) Invert 

func (e EEPROM) Invert() int

func (EEPROM) IsNotPNP 

func (e EEPROM) IsNotPNP() bool

func (EEPROM) IsochronousInp 

func (e EEPROM) IsochronousInp() bool

func (EEPROM) IsochronousOut 

func (e EEPROM) IsochronousOut() bool

func (EEPROM) MaxPower 

func (e EEPROM) MaxPower() int

MaxPower returns maximum power consumption (max. current) from USB in mA

func (EEPROM) ProductId 

func (e EEPROM) ProductId() uint16

func (EEPROM) Read 

func (e EEPROM) Read() error

func (EEPROM) ReleaseNumber 

func (e EEPROM) ReleaseNumber() uint16

func (EEPROM) RemoteWakeup 

func (e EEPROM) RemoteWakeup() bool

func (EEPROM) SelfPowered 

func (e EEPROM) SelfPowered() bool

func (EEPROM) SetCBusFunction 

func (e EEPROM) SetCBusFunction(n int, v CBusFunction)

func (EEPROM) SetChannelDriver 

func (e EEPROM) SetChannelDriver(c Channel, v bool)

func (EEPROM) SetChannelRS485 

func (e EEPROM) SetChannelRS485(c Channel, v bool)

func (EEPROM) SetChannelType 

func (e EEPROM) SetChannelType(c Channel, v ChannelType)

func (EEPROM) SetChipType 

func (e EEPROM) SetChipType(v byte)

func (EEPROM) SetHighCurrent 

func (e EEPROM) SetHighCurrent(c Channel, v bool)

func (EEPROM) SetInvert 

func (e EEPROM) SetInvert(v int)

func (EEPROM) SetIsNotPNP 

func (e EEPROM) SetIsNotPNP(v bool)

func (EEPROM) SetIsochronousInp 

func (e EEPROM) SetIsochronousInp(v bool)

func (EEPROM) SetIsochronousOut 

func (e EEPROM) SetIsochronousOut(v bool)

func (EEPROM) SetMaxPower 

func (e EEPROM) SetMaxPower(v int)

SetMaxPower sets maximum power consumption (max. current) from USB in mA

func (EEPROM) SetProductId 

func (e EEPROM) SetProductId(v uint16)

func (EEPROM) SetReleaseNumber 

func (e EEPROM) SetReleaseNumber(v uint16)

func (EEPROM) SetRemoteWakeup 

func (e EEPROM) SetRemoteWakeup(v bool)

func (EEPROM) SetSelfPowered 

func (e EEPROM) SetSelfPowered(v bool)

func (EEPROM) SetSuspendDBus7 

func (e EEPROM) SetSuspendDBus7(v bool)

func (EEPROM) SetSuspendPullDowns 

func (e EEPROM) SetSuspendPullDowns(v bool)

func (EEPROM) SetUSBVersion 

func (e EEPROM) SetUSBVersion(v uint16)

func (EEPROM) SetUseSerial 

func (e EEPROM) SetUseSerial(v bool)

func (EEPROM) SetUseUSBVersion 

func (e EEPROM) SetUseUSBVersion(v bool)

func (EEPROM) SetVendorId 

func (e EEPROM) SetVendorId(v uint16)

func (EEPROM) String 

func (e EEPROM) String() string

func (EEPROM) SuspendDBus7 

func (e EEPROM) SuspendDBus7() bool

func (EEPROM) SuspendPullDowns 

func (e EEPROM) SuspendPullDowns() bool

func (EEPROM) USBVersion 

func (e EEPROM) USBVersion() uint16

func (EEPROM) UseSerial 

func (e EEPROM) UseSerial() bool

func (EEPROM) UseUSBVersion 

func (e EEPROM) UseUSBVersion() bool

func (EEPROM) VendorId 

func (e EEPROM) VendorId() uint16

func (EEPROM) Write 

func (e EEPROM) Write() error

type Error 

type Error struct {
	// contains filtered or unexported fields
}

func (*Error) Code 

func (e *Error) Code() int

func (*Error) Error 

func (e *Error) Error() string

type FlowCtrl 

type FlowCtrl int

FlowCtrl represents the flow control mode. 

const (
	// FlowCtrlDisable disables all automatic flow control.
	FlowCtrlDisable FlowCtrl = (1 << iota) >> 1
	// FlowCtrlRTSCTS enables RTS CTS flow control.
	FlowCtrlRTSCTS
	// FlowCtrlDTRDSR enables DTR DSR flow control.
	FlowCtrlDTRDSR
	// FlowCtrlXONXOFF enables XON XOF flow control.
	FlowCtrlXONXOFF
)

type Mode 

type Mode byte

Mode represents operation mode that FTDI device can work. 

const (
	ModeReset Mode = (1 << iota) >> 1
	ModeBitbang
	ModeMPSSE
	ModeSyncBB
	ModeMCU
	ModeOpto
	ModeCBUS
	ModeSyncFF
	ModeFT1284
)

type Parity 

type Parity int

Parity represents the parity mode 

const (
	// ParityNone indicates no parity bit is used
	ParityNone Parity = C.NONE
	// ParityOdd indicates an odd parity bit is used
	ParityOdd Parity = C.ODD
	// ParityEven indicates an even parity bit is used
	ParityEven Parity = C.EVEN
	// ParityMark indicates that the parity bit should be a 1
	ParityMark Parity = C.MARK
	// ParitySpace indicates that the parity bit should be a 0
	ParitySpace Parity = C.SPACE
)

type StopBits 

type StopBits int

StopBits represents the number of stop bits to expect 

const (
	// StopBits1 indicates only one stop bit is expected
	StopBits1 StopBits = C.STOP_BIT_1
	// StopBits15 indicates one and a half stop bits are expected
	StopBits15 StopBits = C.STOP_BIT_15
	// StopBits2 indicates two stop bits are expected
	StopBits2 StopBits = C.STOP_BIT_2
)

type Transfer 

type Transfer struct {
	// contains filtered or unexported fields
}

func (*Transfer) Done 

func (t *Transfer) Done() (int, error)

type Type 

type Type uint32

Type is numeric type id of FTDI device. 

const (
	TypeAM Type = iota
	TypeBM
	Type2232C
	TypeR
	Type2232H
	Type4232H
	Type232H
	Type230x
)

func (Type) String 

func (t Type) String() string

String returns text name that describes type id.

type USBDev 

type USBDev struct {
	Manufacturer, Description, Serial string
	// contains filtered or unexported fields
}

func FindAll 

func FindAll(vendor, product int) ([]*USBDev, error)

FindAll search for all USB devices with specified vendor and product id. It returns slice od found devices.

func (*USBDev) Close 

func (u *USBDev) Close()

type USBError 

type USBError int

func (USBError) Error 

func (e USBError) Error() string

Source Files

View all Source files

Directories

Path Synopsis
examples
ftdi_bitbang
ftdi_chipid
ftdi_dcf77
ftdi_eeprom
ftdi_lcd
Pin connection between FT232R and LCD (HD44780 compatible): TxD (DBUS0) <--> D4 RxD (DBUS1) <--> D5 RTS# (DBUS2) <--> D6 CTS# (DBUS3) <--> D7 DTR# (DBUS4) <--> E DSR# (DBUS5) <--> R/W# DCD# (DBUS6) <--> RS
 Pin connection between FT232R and LCD (HD44780 compatible): TxD (DBUS0) <--> D4 RxD (DBUS1) <--> D5 RTS# (DBUS2) <--> D6 CTS# (DBUS3) <--> D7 DTR# (DBUS4) <--> E DSR# (DBUS5) <--> R/W# DCD# (DBUS6) <--> RS
ftdi_naive_lcd
Pin connection between FT232R and LCD (HD44780 compatible): TxD (DBUS0) <--> D4 RxD (DBUS1) <--> D5 RTS# (DBUS2) <--> D6 CTS# (DBUS3) <--> D7 DTR# (DBUS4) <--> E DSR# (DBUS5) <--> R/W# DCD# (DBUS6) <--> RS
 Pin connection between FT232R and LCD (HD44780 compatible): TxD (DBUS0) <--> D4 RxD (DBUS1) <--> D5 RTS# (DBUS2) <--> D6 CTS# (DBUS3) <--> D7 DTR# (DBUS4) <--> E DSR# (DBUS5) <--> R/W# DCD# (DBUS6) <--> RS
ftdi_out
ftdi_sbb_speed
ftn
ftn_example

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