معرفی برد I2CDriver
برد I2CDriver، ابزاری منبع باز، آسان برای کنترل دستگاههای I2C است. این دستگاه با ویندوز، مک و لینوکس سازگار بوده و دارای نمایشگر رنگی برای نمایش داشبورد کاری باس I2C است. این برد از چیپ FTDI USB برای اتصال به کامپیوتر بهره برده و راهانداز خاصی برای نصب آن نیاز نیست. این برد شامل منبع تغذیه جداگانه 3.3V یا نمایشگر ولتاژ و جریان است.
استفاده از I2C در همه‌جا
در موبایل‌ها، دستگاههای الکترونیک تعبیه‌شده، میکروکنترلر‌ها، رزبری پای و مادربورد کامپیوتر‌ها همه جا آنرا خواهید یافت. یک فناوری کامل و در حال رشد و همچنان بعد از 36 سال قدرتمند و پرکاربرد است. I2C توسط افراد تازه‌کار گرفته تا طراحان استفاده می‌شود. اما عنصر مشترک بین کاربران I2C، پشتکار است. به جای آسان بودن، I2C اغلب دشوار به نظر می‌رسد. از آنجا که روش‌های بسیاری برای مواجه با خطا در I2C وجود دارد، به ندرت پیش میاد که “فقط وصل کنید و شروع بکار کند” و در عوض نیاز به رفع اشکال خواهید داشت.
I²CDriver Makes I²C Much More Friendly
While other I²C tools might offer a couple of LEDs, I²CDriver has a clear logic-analyzer display of the signal lines plus a graphical decoding of the I²C traffic.
The I²C traffic decoder
In addition, it continuously displays an address map of all attached I²C devices, so as you connect a device, it lights up on the map. You’ll never have to ask “is this thing even switched on?” again.
The heat map shows all 7-bit I²C addresses
The current and voltage monitoring let you catch electrical problems early. The included color-coded wires make hookup a cinch; no pinout diagram is required. It includes a separate 3.3 V supply for your devices, a high-side current meter, and programmable pullup resistors for both I²C lines.
There are three I²C ports, so you can hook up multiple devices without any fuss.
I²CDriver comes with free (as in freedom) software to control it from:
– a GUI
– the command-line
– C and C++ using a single source file
– Python 2 and 3, using a module
Features
– Open hardware: the design, firmware and all tools are under BSD license
– Live display: shows you exactly what it’s doing all the time
– Fast transfer: sustained I²C transfers at 400 and 100 kHz
– USB power monitoring: USB line voltage monitor to detect supply problems, to 0.01 V
– Target power monitoring: target device high-side current measurement, to 5 mA
– I²C pullups: programmable I²C pullup resistors, with automatic tuning
– Three I²C ports: three identical I²C ports, each with power and I²C signals
– Jumpers: color coded jumpers included in each pledge level
– 3.3 output: output levels are 3.3 V, all are 5 V tolerant
– Supports all I²C features: 7- and 10-bit I²C addressing, clock stretching, bus arbitration
– Sturdy componentry: uses an FTDI USB serial adapter, and Silicon Labs automotive-grade EFM8 controller
– Usage reporting: reports uptime, temperature, and running CRC of all traffic
– Flexible control: GUI, command-line, C/C++, and Python 2/3 host software provided for Windows, Mac, and Linux
Specifications
– Maximum power out current: up to 470 mA
– Device current: up to 25 mA
– Dimensions: 61 mm x 49 mm x 6 mm
– Computer interface: USB 2.0, micro USB connector
Do More With I²CDriver
I²CDriver driving three 8×8 LED modules
By controlling I²C hardware using the PC tools you’re most comfortable with, you can get devices doing what you want in a fraction of the development time. Calibrating devices like accelerometers, magnetometers, and gyroscopes is much simpler and faster when done directly on the PC through I²CDriver.
I²CDriver ships with Python examples using small groups of I²C devices to make something useful.
Watch the Whole Network
As well a a live decode of the traffic, the built in display shows a heatmap of all active network nodes. So in an I²C network with multiple devices, you can see at a glance which ones are the most active.
See what I²C is Doing Instantly
When an I²CDriver is connected to an existing I²C bus, it “snoops” the traffic and displays it on the screen. This provides an excellent tool for debugging I²C issues, because you can listen in on the conversation as it happens.
Capture I²C Traffic to Your PC
I²CDriver can dump all I²C traffic back to the PC. I²CDriver’s capture mode reliably records every bit to an exhaustive time-stamped log. This is really helpful for debug, analysis, and reverse-engineering. Supported formats include text, CSV, and VCD.
Modules and Carriers
Each module is 18 mm x 18 mm with castellated connectors for power and I²C. You can connect headers to them directly, incorporate them in your own designs, or solder onto carrier boards provided in the Expert and Gold pledge levels. These boards hold three modules each so they are all on a single I²C bus. In a few seconds you can combine modules for a quick prototype.
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