7 Maxim Integrated | 2020
Developing the Heart Rate Monitor
Working with Mbed
If you have an existing Mbed account, use the Mouser
HRM Mbed repository and import the provided code
into your compiler.
For first-time users:
1. Go to www.Mbed.org.
2. Click the Mbed OS link, which will take you to the
developer site.
3. Click Log in/Sign up and provide the required
information.
Once registered, you can either begin a new project by
selecting the highlighted Compiler link or by accessing
the Mouser HRM Mbed repository and importing the
code to the compiler. You can select, review, add,
or change platforms within the Compiler screen by
clicking the link in the top right corner. You will find
several other Maxim products and software samples
also supported through Mbed.
Wiring the Board and Reference Design
Wiring the MAX32630FTHR and MAXREFDES117
together requires only a few connections and can be
breadboarded to make this easier. To do so, use the
following steps:
1. Connect the SCL and SDA lines from the
heart rate sensor with P3_5 and P3_4 on the
MAX32630FTHR and the INT on the heart-rate
device to pin P3_0 (Figure 3).
2. The V
IN
for the heart rate sensor needs between
2.5V to 5.5V, but I recommend deriving power
from the 3V3 or SYS connected with the battery.
I've had several issues between the two when
attempting to use 5V.
3. Connect your ground pin.
Programming the Board
Programming the board is as easy as dragging and
dropping a file from one folder to another. The
MAX32630FTHR ships with a debug interface used for
uploading your code to the board.
Figure 3: Pin mapping from Maxim MAX32630FTHR datasheet
Programming
the board is
as easy as
dragging and
dropping a
file from one
folder
to another.
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