Datenblatt für Qwiic pHAT for Raspberry Pi Hookup Guide von SparkFun Electronics

Qwiic pHAT for Raspberry Pi Hookup Guide
Introduction
This Qwiic pHAT for Raspberry Pi is based on the Qwiic Hat. The board adds the quickest and easiest way to
utilize SparkFun's Qwiic ecosystem while still using that Raspberry Pi that you've come to know and love. This
Qwiic pHAT connects the I C bus (GND, 3.3V, SDA, and SCL) on your Raspberry Pi to an array of Qwiic
connectors. Since the Qwiic system allows for daisy chaining (as long as your devices are on different addresses),
you can stack as many sensors as you'd like to create a tower of sensing power!
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SparkFun Qwiic pHAT for Raspberry Pi
DEV-15351
Product Showcase: SparkFun Qwiic pHAT for Raspberry PiProduct Showcase: SparkFun Qwiic pHAT for Raspberry Pi
Required Materials
To follow along with this tutorial, you will need the following materials. You may not need everything though
depending on what you have. Add it to your cart, read through the guide, and adjust the cart as necessary.
Single Board Computer
You will need Raspberry Pi with 2x20 male headers installed.
A Pi Zero W will also work but you will need to make sure to solder some male headers to it.
Or you could stack it on any single board computer (like the NVIDIA Jetson Nano) that utilizes the 40-pin
Raspberry Pi header footrpint.
Raspberry Pi 3 B+
DEV-14643
Raspberry Pi GPIO Male Header - 2x20
PRT-14275
Raspberry Pi Zero W
DEV-14277
SEN-14348
Qwiic Board
Now you probably didn't buy the Qwiic pHAT if you didn't have any Qwiic products to use with it, right? If you don't
have any Qwiic products, the following might not be a bad place to start.
Finally, you'll need our handy Qwiic cables to easily connect sensors to your Qwiic pHAT. Below are a few options.
NVIDIA Jetson Nano Developer Kit
DEV-15297
SparkFun Environmental Combo Breakout -
CCS811/BME280 (Qwiic)
SEN-14348
SparkFun GPS Breakout - XA1110 (Qwiic)
GPS-14414
SparkFun Spectral Sensor Breakout - AS7262
Visible (Qwiic)
SEN-14347
SparkFun Qwiic Adapter
DEV-14495
@ qWIIc
Required Setup Tools
As a desktop, these devices are required:
USB Mouse
USB Keyboard
HDMI monitor/TV/adapted VGA
5V Power Supply
Suggested Reading
If you aren't familiar with the Qwiic system, we recommend reading here for an overview.
Qwiic Connect System
We would also recommend taking a look at the following tutorials if you aren't familiar with them.
Qwiic Cable - 100mm
PRT-14427
Qwiic Cable - 500mm
PRT-14429
Qwiic Cable - 200mm
PRT-14428
Qwiic Cable - 50mm
PRT-14426
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Hardware Overview
The Qwiic pHAT has 4x Qwiic connect ports, all on the same I C bus. A 3.3V regulator is included to regulate
voltage down for any Qwiic boards connected.
There are built-in pull-up resistors on board. If necessary, you can cut the traces to disable depending on the
number of boards connected to the I C bus.
Hardware Assembly
To get started with your Qwiic pHAT, simply plug it into the headers on the Raspberry Pi with the letters facing you.
Once the pHAT is plugged in, you can start plugging in any Qwiic enabled sensors you might have on either side.
Serial Terminal Basics
This tutorial will show you how to communicate with
your serial devices using a variety of terminal emulator
applications.
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Depending on your project, you can mount a qwiic enabled board on the mounting holes using standoffs.
Note: The Qwiic pHat is also compatible with single board computers (like the NVIDIA Jetson Nano or the
Google Coral) that utilize the 40-pin Raspberry Pi header footprint.
Qwiic pHat on Jetson Qwiic pHat on Google Coral
Note: When placing a Raspberry Pi and the pHat in an enclosure (like the Pi Tin), we noticed that the pHAT
was not fully inserted in Pi's header pins. You will need an additional stackable header for a secure
connection depending on your enclosure. Otherwise, the original Qwiic HAT would be better if you need to
using the boards in an enclosure.
Note: When placing a Raspberry Pi and the pHat in an enclosure (like the Pi Tin), we noticed that the pHAT was
not fully inserted in Pi's header pins. You will need an additional stackable header for a secure connection
depending on your enclosure.
I2C on Raspberry Pi
OS and Library Install
If you're starting from scratch, with a blank microSD card, you'll want to install Raspbian. If you've already got a
working Raspbian system, skip ahead to step 3.
1. Download the NOOBS image. As of this writing, it's at version 2.4.4.
2. Follow the official installation instructions.
3. Follow the Wiring Pi Instructions to get git, update and upgrade your Rasbpian packages, then install
WiringPi.
Be patient -- each of these steps takes a while.
Once you've got wiringPi installed, run the gpio commands shown below.
>gpio -v
>gpio readall
It should respond with some information about the wiringPi version and the Pi that its running on, then draw a table
illustrating the configuration for the pins in the 40-pin connector.
Configuration
Like the SPI peripheral, I2C is not turned on by default. Again, we can use raspi-config to enable it.
1. Run sudo raspi-config .
2. Use the down arrow to select 5 Interfacing Options
3. Arrow down to P5 I2C .
4. Select yes when it asks you to enable I2C
5. Select OK and then Finish
Once you return to terminal, enter this command:
>ls /dev/*i2c*
The Pi should respond with:
/dev/i2c-1
Which represents the user-mode I2C interface.
Utilities PRT-15
Utilities
There is a set of command-line utility programs that can help get an I2C interface working. You can get them with
the apt package manager.
sudo apt-get install -y i2c-tools
In particular, the i2cdetect program will probe all the addresses on a bus, and report whether any devices are
present. Call i2cdetect -y 1 to probe the first I C bus, which is what the Qwiic pHAT is connected to.
pi@raspberrypi:~/$ i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
This map indicates that there is a peripheral at address 0x60. We can read and write its registers using the
i2cget , i2cset and i2cdump commands.
Resources and Going Further
For more information, check out the resources below:
Schematic (PDF)
Eagle Files (ZIP)
GitHub Repo
SFE Product Showcase
Now that you have your Qwiic pHAT ready to go, it's time to check out some of Qwiic enabled products.
2
Qwiic JST Connector - SMD 4-pin
PRT-14417
Qwiic Cable - Grove Adapter (100mm)
PRT-15109
But I Already Have Sensors!
If you already have a handful of SparkFun sensors and parts? SparkFun has been putting our standard
GND/VCC/SDA/SCL pinout on all our I C boards for many years. This makes it possible to attach a Qwiic Adapter
that will get your SparkFun I C sensor or actuator onto the Qwiic system.
Here is the list of the boards that have the standard I C pinout and will work with the Qwiic adapter board:
9DoF Stick IMU - LSM9DS1
9DoF IMU - MPU-9250
6DoF IMU - LSM303C
6DoF IMU - LSM6DS3
Triple Axis Accelerometer - LIS3DH
Triple Axis Magnetometer - MAG3110
Triple Axis Magnetometer - MLX90393
Compass Module - HMC6343
Atmospheric Sensor - BME280
Barometric Pressure Sensor - MS5803-14BA
Barometric Pressure Sensor - T5403
Humidity and Temperature Sensor - Si7021
Digital Temperature Sensor - TMP102
Particle Sensor - MAX30105
Air Quality Sensor - CCS811
ToF Range Finder - VL6180
Haptic Motor Driver - DRV2605L
Micro OLED Display
RGB and Gesture Sensor - APDS-9960
RGB Light Sensor - ISL29125
LED Driver - LP55231
DAC Breakout - MCP4725
16 Output I/O Expander - SX1509
Battery Babysitter - BQ24075
Check out this related tutorial:
SparkFun Edge Development Board - Apollo3
Blue
DEV-15170
SparkFun Transparent Graphical OLED
Breakout (Qwiic)
LCD-15173
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Raspberry Pi SPI and I2C Tutorial
OCTOBER 29, 2015
Learn how to use serial I2C and SPI buses on your Raspberry Pi using the
wiringPi I/O library for C/C++ and spidev/smbus for Python.