1. Spencer Reardon and Kenneth Adams Jr.11
Ultrasonic Signal Processing for Structural Health Monitoring
11/02/10
J. Michaels and T. Michaels
Real Time OS on MBED
Spencer Reardon and Kenneth Adams Jr.
ECE 4180 1

2. Design Service Calls (API) Scheduler Drivers Demo Apps Threads
Ultrasonic Signal Processing for Structural Health Monitoring 22
11/02/10
J. Michaels and T. Michaels
Design
Service Calls (API)
Threads
Synchronization
I/O
Scheduler
Drivers
Demo Apps

3. Threads API Calls: Features:
Ultrasonic Signal Processing for Structural Health Monitoring 33
11/02/10
J. Michaels and T. Michaels
Threads
API Calls:
task_create
task_wait
task_exit
task_detach
task_self
sleep
Features:
Priority designation (real time, high, normal, and low), range of allowable stack sizes, protected stacks, lower power idle mode

4. Synchronization API Calls: Features: mutex_create mutex_lock
Ultrasonic Signal Processing for Structural Health Monitoring 44
11/02/10
J. Michaels and T. Michaels
Synchronization
API Calls:
mutex_create
mutex_lock
mutex_unlock
Features:
Task ownership, sleep based blocking, makes use of ARM atomic instruction, “smart” unlocking

5. Memory Protection Implementation: Catches access violations
Ultrasonic Signal Processing for Structural Health Monitoring 55
11/02/10
J. Michaels and T. Michaels
Memory Protection
Implementation:
Catches access violations
Stack overflow protection

6. I/O Device Support Implementation: Features:
Ultrasonic Signal Processing for Structural Health Monitoring 66
11/02/10
J. Michaels and T. Michaels
I/O Device Support
Implementation:
open
read
write
close
seek
ioctl
Features:
Sleep tasks trying to write to full buffers; supports: pwm, GPIO, serial, filesystem

7. Gantt Chart
(Planned)
(Actual)

8. Ultrasonic Signal Processing for Structural Health Monitoring88
11/02/10
J. Michaels and T. Michaels
Demo
SPASH (SPArtan SHell) – Offers a command interpreter that allows a user to run various tasks.
Control priorities of tasks
Background or foreground tasks
Various applications
top – show multiple tasks running
audio – plays audio over pwm output
video – plays video over serial connection
crash – force user mode crash by null dereference
Debug Console – Debug console shows pertinent information about task life cycles

9. Ultrasonic Signal Processing for Structural Health Monitoring99
11/02/10
J. Michaels and T. Michaels
Questions?
You there, student, what is your question?