• Download new and previously released drivers including support software, bios, utilities, firmware and patches for Intel products.
• Devantech I2C to USB Commander v.1.0 A Perl script that interfaces with the Devantech USB to I2C interface adapter. This script allows a user to read and write as a master to the i2c bus as well as set or get the value of the io pins.

A Perl script that interfaces with the Devantech USB to I2C interface adapter. This script allows a user to read and write as a master to the i2c bus as well as set or get the value of the io pins. Downloads: 0 This Week Last Update: 2014-04-10 See Project.

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USB-ISS Multifunction USB Communications Module
Technical Specification

Overview
The USB-ISS Multifunction USB Communications Module provides acomplete interface between your PC and the I2C bus, SPI bus, a Serial portand general purpose Analogue Input or Digital I/O. The module is poweredfrom the USB. Operating voltage is selectable between 3.3v and 5v. and can supply up to80mA at 5v for external circuitry from astandard 100mA USB port.

Documentation
This documentation is divided up into 6 pages.
1. This page describes the connections to the USB-ISS, the USBdriver installation and setting of the USB-ISS operating modes.
Five further pages describe the operational commands and the Boot-Loader.
2. I2C Operation, describes all the I2Ccommands available
3. SPI Operation, describes the format forSPI communication
4.Serial Operation, describes how to sendand receive serial data.
5. I/O Operation, describes how to setpins high/low and read digital or analogue inputs.
6. Boot Loader, describes how to update thefirmware in the USB-ISS.

First Step - Get The Drivers
Before connecting the USB-ISS module, you should downloadthe driver and unzip it to a temporary folder. Now connect the USB-ISSmodule and navigate windows to the temporary folder and install the driver.The USB-ISS will now appear as a COM port.

Which COM port?
After installing the drivers, and plugging in the USB-ISS module to a spare USBport, you will want to know which COM port it has been assigned to. This willvary from system to system depending on how many COM ports you currently haveinstalled. To find out where it is, right click on your 'My Computer'desktop icon and select 'Properties->Hardware->Device Manager'. Now scroll down andopen the 'Ports (COM & LPT)' tab. You should see the USB serialport listed - COM5 in the example below. If you want to change the COM portnumber - just right click on it, select properties, select advanced and selectthe COM port number from the available list. The COM port default will probably be set up for 9600 baud, 8 data bits, no parity and one stop bits, but what ever it is just ignore it. These settings are not actually used because we have a full 12Mbits USB connection right into the heart of the processor.

Connections
The diagram below shows the connections for the various modes.

3.3v or 5v
Add the link for 5v, remove it for 3.3v
The processor on the USB-ISS is equally happy running from 3.3v or from 5v.With the LEDs it takes up to 20mA so when 5v is selected by linking the powerselect pins, the USB-ISS module can supply up to 80mA to externaldevices. When the link is removed a 3.3v regulator supplies the power. Thisregulator is capable of 50mA, so when running at 3.3v up to 30mA is available toyour circuits. If your application requires more than this, or has its own supply, thenleave the 3.3v/5v pin unconnected. Do not apply your own voltage to this pin.

LEDs
The Green Led is a power indication and is on all the time the module isconnected to a powered USB port. The Red LED will flash whenever there is avalid I2C or SPI command received.

I/O pins
Each I/O pin, 1 to 4, may be individually selected to be Analogue Input or DigitalInput or Digital Output.
Inputs will not accept voltage higher than the supply, so whenoperating at 3.3v the inputs are NOT 5v tolerant.
Analogue inputs span from 0v to the supply for a range of 0-1023 (10-bit A/Dconversion).

SCL and SDA
These pins are the I2C bus connections. They should be connected directly to theSCL and SDA pins on your I2C device. The USB-ISS module is always a bus master,and is fitted with 4.7k pull-up resistors on the PCB. These resistors areautomatically disconnected in other modes.

SDI, SCK, SDO and CE
SDI is the SPI input to the USB-ISS, connect it to SDO on your device.
SDO is the SPI output from the USB-ISS, connect it to SDI on your device.
SCK is the SPI clock output from the USB-ISS, connect it to SCK on your device.
CE is the active low chip enable signal, connect it to CE on your device.

Tx and Rx
Envision driver download for windows 10 7. These are logic level signals, not RS232. Do not connectthis to an RS232 port without using a suitable RS232 logic level inverter chip.

0v Ground
The 0v Ground pin must be connected to the 0v (Ground) on your device.

Setup Commands
The USB-ISS command (0x5A) is used for internal operations. The arethree sub-commands: Eq-3 mobile phones & portable devices driver download for windows 10.

ISS-VERSION will return three bytes. The first is theModule ID, this will always be 7. The second byte is the firmware revisionnumber. The third byte is the current operating mode, ISS_MODE. This isinitialized to 0x40 (I2C-S_100KHZ) on power up.
Example:
Send 0x5A, 0x01.
Receive 0x07, 0x02, 0x40.

GET_SER_NUM will return the modules unique 8 byte USB serialnumber.
Example:
Send 0x5A, 0x03.
Receive 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31. (that's'00000001')
The received serial number will always be ASCII digits in the range'0' to '9' ( 0x30 to 0x39 ).

ISS_MODE sets the operating mode. This sets up the modules I/O pins andhardware for the required mode. There are 4 operating modes (I2C, SPI, Serialand I/O) some which can be combined. I2C mode is further broken down into thevarious fixed frequencies and the use of software (bit bashed) or hardware I2Cports. The full list is:

I/O_CHANGE is not really an operating mode. It's used to changethe I/O mode between Analogue Input, Digital Input and digital Output withoutchanging Serial or I2C settings.
The I2C modes will have I/O on the I/O1 and I/O2 pins.
Serial mode will have I/O on the I/O3 and I/O4 pins.
I2C and Serial can be combined, for example I2C_S_100KHZ (0x40) + SERIAL (0x01)= 0x41.
SPI requires all four I/O pins so there are no other options for this mode.

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For example 0x01 (binary 00000001) would set I/O1 to output highand I/O's 2-4 to output low.
0xB4 (binary 10110100) would set I/O4 to digital input, I/O3 to analogue input,I/O2 to output high and I/O1 to output low.
The four byte command to set I/O mode is:

I/O mode may be combined with SERIAL mode.
When combined with SERIAL, I/O1 is the Rx pin and I/O2 is the Tx pin. Only I/O3and I/O are available as I/O pins.
This is a 6 byte setup command.

In all mode setting commands, two bytes are returned. See ResponseBytes below.

The formula for calculating the baud rate is:
x = (48000000/(16+baud rate))-1
For example if the required baud rate is 19200
(48000000/(16*19200))-1 = 155.25 so we will use 155.
155 is 0x009B so we set the high byte to 0x00 and the low byte to 0x9B.
Here are some standard baud rates:

The serial mode is compatible with both 1 and 2 stop bit formatsbecause is transmits 2 stop bits and only needs to receive 1. There is noparity.

IO_CHANGE
Not really an operating mode. It's used to changethe I/O mode between Analogue Input, Digital Input and digital Output withoutchanging Serial or I2C settings. It only needs to be used when you are usingSerial or I2C modes and you want to change the I/O pins. The format is:

In all mode setting commands, two bytes are returned. See ResponseBytes below.

I2C Modes
There are 7 I2C commands as detailed above. They differ only in the SCLfrequency and whether they use a software bit bashed driver or the I2C hardwarein the PIC chip.
The I2C command on its own will have I/O on pins I/O1 and I/O2. This is a 4 bytesetup command.

This example will initialize I2C to 100khz using the hardwareI2C peripheral in the PIC chip.

The I2C commands may be combined with SERIAL mode.
When combined with SERIAL, I/O1 is the Rx pin and I/O2 is the Tx pin. This is a5 byte setup command.

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The formula for calculating the baud rate is the same as for I/O+Serialabove.
In all mode setting commands two bytes are returned. See ResponseBytes below.

SPI Mode
This mode requires all four I/O pins, so cannot be combined with serial, I2C orI/O. Refer to the connection diagram above for pin-outs. SPI mode is capable ofoperating in all four possible clock phases. SPI_MODE command (0x90) maycombined with the phase selection bits.

0x90 is the standard mode, use this with SPI SRAM, EEPROM's etc.
Setting SPI mode is a 4 byte command:

The SCK divisor sets the SPI clock speed. The formula is:
Divisor = (6000000/SCK)-1
For a 3Mhz SCK, divisor = (6000000/3000000)-1 = 1
For 500khz SCK, divisor = (6000000/500000)-1 = 11
The maximum divisor of 255 gives the slowest SCK of just 23.44khz.
A minimum of 0x01 should be set for the divisor, if you set 0x00 it will be thesame as 0x01.

In all mode setting commands, two bytes are returned. See ResponseBytes below.

Response Bytes
The response to the mode setting frames is always two bytes.
The first byte is ACKnowledge (0xFF) or NotACKnowledge (0x00).
If you get an ACK then the second byte will be just 0x00.
If you get a NACK then the second byte will be the reason, as follows:
0x05 Unknown Command
0x06 Internal Error 1 }
0x07 Internal Error 2 } you should never see these

Under normal circumstances the response will be 0xFF, 0x00

Testing the USB-ISS
We have a small test program which will let you try out the different operatingmodes of the USB-ISS module. It is written in Visual C# 2010 version.

You can download just the executable filesor the full source code.

Dimensions