April 18
26
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ndustrial
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o
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munication technology. The Renesas PMOD
BLe module used is the RL78/G1D based on
the RY7011 device with 256KB program flash,
8KB data flash, 20KB SRAM and with the low-
est power consumption of 4.3mA RF trans-
mission mode and 3.5mA RF receiving mode
in the industry.
While this describes the appropriate hard-
ware capability of wireless communication,
we can now turn to the next logical step of
implementing the appropriate communi-
cation protocol and control software. The
communication protocol software is based
on predefined rules and interface specifica-
tions that must be complied with. Renesas
protocol stack software takes over and sim-
plifies the implementation of the BLe pro-
tocol. It also delivers a standard profile and
custom profile mountable API on the top.
Selectable configurations like embedded and
modem mode (virtual UART) can be used. It
is a good idea to define the approach before
starting work on the storyboard. This could
involve answering questions on the goal to
be achieved and requirements that need to
be fulfilled. The target that Renesas aims for,
with its wireless capable motor control refer-
ence design, is to have a flexible system refer-
ence design solution that allows customized
and easy start-up, evaluation and develop-
ment. It does this by incorporating all the
attributes and needs of a modern compact
motor control solution, offering and keep-
ing in background all the flexibilities and
options for further feature implementation
and development adaption.
The requirements can be defined by clarifying
which features are must-haves and which are
nice to have – then finding a balance between
the two. This can be clarified from the refer-
ence design point of view beforehand. The
first step is to select and define the import-
ant data and parameters to be shared, moni-
tored and manipulated so that understanding
of the overall context of the solution process
can be created and followed. The user friendly
and customization options also need to be
included.
Having done that as a first step, the defini-
tion of the main requirements and the char-
acteristic of the smart control software have
been delivered. Next comes the definition of
the exact storyboard flow with all mandatory
selections of the visualization and represen-
tation. This includes event processing, state
machine flow and error handling. It is import-
ant to remember that user friendliness has
a high priority as it is one of the main attri-
butes defining the important final touch over-
all. All in one, a very complex process method
with lots of mandatory steps that cannot be
ignored or avoided.
Here we come now to the offered wireless
motor control capable software as a smart
phone APP YROTATE-IT. Based on the
defined requirements and characteristic, fol-
lowing attributes and functionalities are avail-
able and offered: search and list valid devices,
connection with one from the user selected
external device available on the list, and menu
bar which includes Run page, History page,
and Set-Up page. Run page enables to set-up
rotational speed, to monitor battery, cur-
rent, load and actual rotational speed, allows
Start/Stop running and changing rotational
direction. History page is responsible for
monitoring the reactional behavior of the sys-
tem by visualizing the flow of the parameter:
voltage, current, load and speed. Selection
between the depicted flows of the parameters
is also made as well as amplitude depiction
and monitoring selectable Set-Up page. On
Set-up page you can get the available motor,
current and speed control parameter and
set or identify the motor parameter. Set the
Figure 2. YROTATE-IT-Deliverables characteristics
Figure 3. Application development using a host microcontroller
Figure 4. Storyboard visualization and presentation art process
