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Using the MSP-EXP430FG4618 Development Tool establish a data exchange between the MSP430FG4618 and MSP430F2013 devices using the SPI mode. The MSP430FG4618 uses the USCI module while the MSP430F2013 uses the USI module.

Laboratory communications: lab2 - echo test using spi

Introduction

The MSP430 contains built-in features for both parallel and serial data communication. This chapter describes the operation of these peripherals, and discusses the protocols, data formats and specific techniques for each type of data communication.

The communication modules available for the MSP430 family of microcontrollers are USART (Universal Synchronous/Asynchronous Receiver/Transmitter), USCI (Universal Serial Communication Interface) and USI (Universal Serial Interface). These provide asynchronous data transmission between the MSP430 and other peripheral devices when configured in UART mode. They also support data transmission synchronized to a clock signal through a serial I/O port in Serial Peripheral Interface (SPI) and Inter Integrated Circuit (I2C) modes.

Overview

This laboratory explores the USCI and USI communication interfaces in SPI mode. The MSP430 devices included on the Experimenter’s board will exchange messages between themselves, one being the MSP430FG4618 (master) that will control operation of the other MSP430F2013 device (slave). The master, by reading the current state of the slave, will drive the slave to the new desired state, controlling its activity. In this particular case, switching the state of LED3 will be implemented.

Resources

This laboratory uses the USCI module of the MSP430FG4618 device and the USI module included on the MSP430F2013. Both units operate in SPI mode.

The Basic Timer1 of the master device is programmed to switch the status of the slave device once every 2 seconds.

The slave is notified of the arrival of information through the counting end interrupt of the USI module.

The resources used are:

- USCI module;

- USI module;

- Basic Timer1;

- Interrupts;

- I/O ports.

Software application organization

The software architecture for this laboratory is shown in Figure 1.

The master unit is composed of two software modules ( Lab2_Comm_1.c ):

- The "Main master task" module contains the operation algorithm of master unit;

- The "ISR Basic Timer" module wakes the "Main master task" once every 2 seconds.

The slave unit is also composed of two modules ( Lab2_Comm_2.c ):

- The "Main slave task" module contains the operation algorithm of the slave unit;

- The "USI ISR" module reads the data received, prepares the USI module for new reception and wakes the "Main slave task" to execute the algorithm associated with the reception of the new command.

Software architecture

System configuration

Usci_b (master) control registers configuration

The SPI connection will operate in the following mode:

- Clock phase ->Data value is updated on the first UCLK edge and captured on the following edge;

- Clock polarity ->the inactive state is low;

- MSB first;

- 8-bit data;

- Master mode;

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Teaching and classroom laboratories based on the “ez430” and "experimenter's board" msp430 microcontroller platforms and code composer essentials. OpenStax CNX. May 19, 2009 Download for free at http://cnx.org/content/col10706/1.3
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