FUN Seminar Salvatore GUZZO BONIFACIO 10 March 2015 SUMMARY 1. - - PowerPoint PPT Presentation

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FUN Seminar Salvatore GUZZO BONIFACIO 10 March 2015 SUMMARY 1. Etinode Drivers 2. Contiki Porting For Etinode 3. Periodic Send Command 4. 802.15.4 USRP Receiver 5. VITAL Project 1 Etinode Drivers 10 March 2015 STM Driver (Accelerometer +

SLIDE 1

FUN Seminar

Salvatore GUZZO BONIFACIO 10 March 2015

SLIDE 2

SUMMARY

1. Etinode Drivers
2. Contiki Porting For Etinode
3. Periodic Send Command
4. 802.15.4 USRP Receiver
5. VITAL Project

SLIDE 3

Etinode Drivers

10 March 2015

1

SLIDE 4

STM Driver (Accelerometer + Gyroscope)

stm.h stm-io.h LIS331.h LIS331-io.h L3G4200D.c L3G4200D-io.h LIS331.c L3G2400D.h

<<include>> <<include>> <<include>> <<include>> <<include>> <<include>> <<include>> <<include>>

SLIDE 5

STM common functions The primary level for STM driver defines a set

f constants and basic functions that are

common for both sensors in the Etinode. They are:

Init
IO_init
ReadBytes
WriteBytes

SLIDE 6

L3G4200D (Gyroscope)

Main Functions:

init
setup
read_raw_data
raw_to_dps
register_callback
set_threshold_interrupt
set_watermark_level
get_fifo_level

Examples:

raw_data
gyro_watermark
gyro_threshold

SLIDE 7

LIS331 (Accelerometer)

Main Functions:

init
setup
read_raw_data
raw_to_milliG
register_callback
set_freefall_interrupt
set_inertial_wakeup_interrupt

Examples:

raw_data
inertial
freefall

SLIDE 8

10 March 2015

Contiki Porting For Etinode

2

SLIDE 9

ETINODE

Component Description

MCU 16-bit Ultra-Low-Power – MSP430F1611 sensors Light Sensor – TSL2550 Barometer/Temperature – MS5611-01 Gyroscope – L3G4200D Accelerometer – LIS331DLH radio communication 2.4 GHz – CC2520 external memory 1MB external flash memory – M25P80 LEDs green, red, blue EEPROM serial number allowing unique identifier – DS2411

SLIDE 10

Contiki Directory Structure

apps/ – architecture independent applications One subdirectory per application core/ – system source code Subdirectories for different parts of the system cpu/ – CPU-specific code One subdirectory per CPU doc/ – documentation examples/ – example project directories Subdirectories with project platform/ – platform-specific code One subdirectory per platform tools/ – software for building Contiki, sending files

SLIDE 11

Main involved files (1/2)

platform-conf.h:

platform CPU
clock speed
LEDs
SPI bus pins and main functions
Radio chip pins and main functions

contiki-conf.h:

Netstack drivers
Energest module parameters
UIP parameters
SICSLOWPAN parameters

SLIDE 12

Main involved files (2/2)

contiki-etnode-main.c:

Includes all needed libraries
Platform initialization
Hardware initialization
Starts and handles contiki process scheduler

Makefile.etinode

Defines source files for modules and architecture dependent drivers
Upload command
Reset command
Motelist command
Login command

SLIDE 13

dev/ Subfolder

The dev/ folder is meant to be a place where all the device drivers needed by the platform are stored.

USART driver
UART driver
I2C driver
Sensor drivers

SLIDE 14

10 March 2015

Periodic Send Application

3

SLIDE 15

Contiki Shell Application: Periodic Send

Main requirements:

periodic send of a message containing a string of random upper-

case letters

selectable time period
selectable channel to use
selectable transmission power
selectable message length
possibility to define an autostart flag
enable/disable MAC layer header
configuration persistence

SLIDE 16

Command Developed

periodicsend:

periodically send a message over the radio depending on stored configuration

showconf:

shows the currently saved configuration

saveconf:

save a new configuration

enableRx:

enables radio reception in MAC compliant mode

SLIDE 17

« showconf »

SLIDE 18

Demo

Live Example

SLIDE 19

10 March 2015

802.15.4 USRP Receiver

4

SLIDE 20

802.15.4 Physical layer modulation

IEEE 802.15.4 physical layer properties:

O-QPKS modulation
Direct-sequence Spread Spectrum
Half-Sine Pulse Shaping

SLIDE 21

NI USRP Architecture

SLIDE 22

Differential Phase Recognition

SLIDE 23

Delta Theta: Input and Output

SLIDE 24

Labview Receiver Architecture

Delta Theta Sign Downsampling Symbol Correlation Symbol to Byte mapping

USRP Samples Decoded Message

SLIDE 25

Labview Decoded Packet

SLIDE 26

10 March 2015

VITAL Project

5

SLIDE 27

VITAL Architecture

SLIDE 28

Thank you Any question ?

Salvatore GUZZO BONIFACIO FUN Research Team Inria Lille 10 March 2015