FiO Boards and RapidSTM32
Beginners Workshop
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Objective:
Able to use FiO Boards and
RapidSTM32 Blockset to perform
"most common tasks"
immediatley
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What are microcontrollers?
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3GHz, 1TB HDD, 8MB RAM
USB, Wifi, LAN
Keyboard, Monitor, Mouse
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100MHz, 1MB HDD (Flash), 64kB RAM
UART, I2C, SPI, CAN, USB, LAN
Buttons, LCD
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what?
when?
how?
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what?
when?
how?
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Software
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Minimum Requirements
...install in the order shown
1. Microsoft .NET Framework 3.5 or later
Free download from http://www.microsoft.com/net
2. Matlab + Simulink + Real-Time Workshop + Real-Time
Workshop Embedded Coder R2009a or later
(R2011 or later Real-Time Workshop = Simulink Code,
Real-Time Workshop Embedded Coder = Embedded
Coder)
3. Keil RVMDK R4.13a or later
Free download from
https://www.keil.com/demo/eval/arm.htm
4. RapidSTM32 Blockset
Free download from https://www.aimagin.com/download/
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http://aimagin.com/learn/index.php/Getting_Ready
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You will learn to ...
Implement a Low-Pass
Butterworth Digital Filter
Use PWM signal to control a
servo motor
Perform PIL Verification
Use photocell
(LDR) to acquire
light data in realtime into Simulink
Log data to microSD
Generate code for Non
FiO Board & Manually
modify C Code
Control external
hardware from Simulink
Use digital
output to
drive LEDs
Display status on a
character LCD
Real-Time DAQ and data
plots in Simulink
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Let's Begin
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Case studies:
Design an automatic light switch controller.
Auto OFF during the day
FiO Boards and RapidSTM32 Beginner's Workshop
Auto ON at night
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Photocell (LDR) Circuit
Vin = 3.3V
The brightness level relates to Vsense and Rphotocell
R 2.2KOhm
as follows:
Vsense = Vin * Rphotocell / (Rphotocell+2200)
Photocell (LDR) resistance
Rphotocell varies as a
function of brightness.
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Warning!!!
FiO Boards ADC only accepts between 0 - 3.3V DC.
Higher voltages will cause permanent damages to the system.
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System Concept
Acquire Real-Time Data into Simulink
Target
Host PC
Plot Graphs
ADC CH13
= Pin C3
USB (HID)
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Analog to Digital Converter
(ADC)
Analog
Sensors
(Pressure,
Temperature
, Distances,
etc.)
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Voltage (03.3V)
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The circuit diagram
3.3VDC
GND
Vsense
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Target Simulink Model
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Commonly Used Steps Before Build
•
•
Update Diagram Twice:
Check sample time (Ts) of all blocks are
correct.
Set target in USB IAP Mode:
Use request_productinfo('usb', 'name')
command
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USB In-Application Programming Mode
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Help Please
help rapidstm32_blockset
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Host PC Simulink Model
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Run User Custom Program Mode
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Running the System
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Questions?
•
•
•
What voltage range is "Day"?
What voltage range is "Night"?
How would you design the "ON" / "OFF"
algorithm?
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Running the System - Explain
Night
Threshold
2VDC
Day
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The "ON" / "OFF" algorithm
threshold = 2; %volts
LEDON = 1;
LEDOFF = 0;
if (vin>threshold)
cmd = LEDON;
else
cmd = LEDOFF;
end
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System Concept
Testing Algorithm
Target
Host PC
ON/OFF
Algorithm
Plot Graphs
+ ON/OFF
ADC CH13
= Pin C3
USB (HID)
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Host PC Simulink Model
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Running the System
Vin
Threshold
2VDC
cmd
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The Build Process Explain - 1
Source Files
(*.c, *.h)
Compiler
Assembly Files
(*.s)
Assembler
Assembly Files
(*.s)
Compile
Object Files
(*.o)
Object / Library Files
(*.o, *.lib, *.a)
Linker
Executable Files
(*.hex / *.bin)
Load/
Burn
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The Build Process Explain - 2
Keil
RVMDK
Matlab/
Simulink
Source Files
(*.c, *.h)
FiO /
RapidSTM32
Compiler
Assembly Files
(*.s)
Assembler
Assembly Files
(*.s)
Compile
Object Files
(*.o)
Object / Library Files
(*.o, *.lib, *.a)
Linker
Executable Files
(*.hex / *.bin)
Load/
Burn
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System Concept
Turning LED ON / OFF from Simulink
Target
Host PC
Algorithm
Plot Graphs
+ ON/OFF
ADC CH13 = Pin C3
ADC
USB (HID)
LED
ON/OFF
cmd
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Target Simulink Model
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Host PC Simulink Model
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Try the following
simulation !!!
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Things
to note
1.
Communication Architecture Explain
Native Simulink simulation
is NOT real-time
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Things
to note
2.
Communication Architecture Explain
Target
Host
Very Accurate Timing
Poor Real-Time
Performance
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How to make Simulink simulation real-time?
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Poor Timing
Very Accurate Timing
Target
Host
RX
RX
5
2
DO
DO
6
3
TX
FiO Boards and RapidSTM32 Beginner's Workshop
1
4
TX
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How to make Simulink simulation real-time?
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Play dumb
Very Accurate Timing
Target
Host
RX
RX
5
2
DO
DO
6
3
TX
1
4
TX
Wait for correct time step
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Both target & host start in wait (RX) state.
Target
Host
RX
RX
5
2
DO
DO
6
3
TX
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1
4
TX
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Solution
Target
Host
RX
RX
DO
DO
TX
TX
Force Output
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communication architecture controls
Real-Time Simulation
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Human Interface
Device
USB
63 bytes per data
packet
HID Protocol Blocks
No special driver needed
Same as
Maximum 1,000
packets per second
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Limitations when using USB HID
From Target -> Host maximum 1kHz
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Limitations when using USB HID
Between Target <-> Host maximum 200Hz.
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Limitations when using USB HID
USB HID packet is 63bytes maximum.
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What happens when the photocell
output is very noisy?
Sensor affected (shadowed) by a
tree or clound.
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How
would
you
solve
this
problem?
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Fourier Transform
Time
Domain
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Frequency
Domain
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Simulation Study
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Simulation Results
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Fast changing
(high frequency)
signal component
+
Slow changing
(low frequency)
signal component
Low frequency
component
Low Pass
Filter
High frequency
component
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System Concept
Implementing Low Pass Filter
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System Concept
Adding Low Pass Filter
Target
Host PC
Plot Graphs
+ ON/OFF
ADC CH13 = Pin C3
ADC
USB (HID)
2 LEDs
ON/OFF
cmd
FiO Boards and RapidSTM32 Beginner's Workshop
Lowpass
FIlter
ON/OFF
Algorithm
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Target Simulink Model
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Host PC Simulink Model
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Running the System
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Advantages of designing and
testing algorithm in the Host PC?
Any one???
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Answers: Fast 'n' Easy
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How certain are you that the actual
embedded system will perform
exactly as simulated?
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System Concept
Processor in the Loop (PIL) Verification
Explain
Target
Host PC
Compare
results
ADC CH13 = Pin C3
ADC
Lowpass
FIlter
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Lowpass
FIlter
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Target Simulink Model
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Host PC Simulink Model
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Running the System
Why do we need to
reset the target
before running
every time?
Answer on the
following slide.
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Answer to previous question
To reset the initial condition of the
filters on the target to the same state
(zero) as on the host.
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System Concept
Stand-Alone System Implementation - LCD
Toggle LED
Display
string
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Target Simulink Model
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Tips for using the LCD Block
Select Action
before output
characters to "Do
nothing" for none
first line display.
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System Concept
Stand-Alone System Implementation LCD + Data
Logger
Log Data to
Micro SD Card
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Target Simulink Model
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The Challenge...
Can you design an auto-tune
(adaptive) ON/OFF algorithm?
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Adaptive Algorithm Solution
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The Real-Time Block
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Non Real - Time
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The Non - Real Time Simultion
Simulation
Do Something
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Try the same simulation
with the Real-Time Block
(The Real-Time Block Explain)
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The Real Time Block
No
Correct
time?
Yes
Do Something
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System Concept
Driving an RC Servo
Target
Host PC
Drive Servo
Motor
Add a Real-Time
Block
USB (HID)
%Duty
Cycle
Display %
Duty Cycle
Slider Gain User Interface
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How does an RC servo work?
20msec = 50Hz
10deg
10% Duty Cycle
80deg
40% Duty Cycle
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Target Simulink Model
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Host PC Simulink Model
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Can you help find the range of %Duty Cycle for correct operation?
Degrees
% Duty Cycle
Minimum
Maximum
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The Sample Time
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CTRL + J
Base Sample Time
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Multi-rate
Single
Tasking
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How to allow users to input angles
in degrees instead of %DC?
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Advanced "How To"
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"
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Manually Modify the generated
C Code
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Where is the generated C
code?
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model.mdl
model_rapidstm32 folder
header1.h
source1.c
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model_rapidstm32
folder
stm32f10x_hwdrvlib.h
Hardware Driver Code
stm32f10x_hwdrvlib.c
model.h
Algorithms
model.c
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How to Set up Keil RVMDK?
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Manually modifying C code allows applications with ...
No Blocks
Non - FiO Boards
Mass Products
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FiO and RapidSTM32 is for ...
Rapid prototyping
Complex algorithm made easy
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https://www.facebook.com/groups/fiousers/
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help@aimagin.com
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