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Using the eZ430-RF2500 Development Tool use ADC10 to perform a single temperature sample on channel A10 (on-chip temperature sensor) each minute during 1 hour.

Laboratory signal acquisition: lab1 - sar adc10 conversion


This laboratory gives examples of the uses of the ADC types available in the hardware development kits. A different laboratory is developed for each kit, taking into account that both the ADC10 and the SD16_A laboratories implement a temperature data logger. The ADC12 laboratory also uses operational amplifiers to perform the analogue signal conditioning.


This laboratory ( Lab1_ADC.c ) implements a temperature data logger using the hardware kit’s integrated temperature sensor. The device is configured to perform an acquisition each minute for one hour. Each temperature’s (ºC) value is transferred to flash info memory segment B and C. When the microcontroller is not performing any task, it enters into low power mode.


The ADC10 module uses V REF+ = 1.5 V as the reference voltage.

It is necessary to configure the ADC10 to use the integrated temperature sensor (A10) as an input. Timer_A generates an interrupt once every second that starts conversion in the ADC10. At the end of a conversion, an interrupt is requested by the converter and the temperature value is written to flash memory.

The voltage value is converted into temperature following the equation provided in ADC10 section of the MSP430 User’s Guide<slau144e.pdf>. After transferring the value to the flash memory, the system returns to low power mode LPM3.

The resources used by the application are:

- ADC10;

- Timer_A;

- Ports I/O;

- Interrupts;

- Low power mode.

Software application organization

The application starts by stopping the Watchdog Timer.

The system checks for calibration constants on info memory segment A. The CPU execution will be trapped if it does not find this information.

Digitally controller oscillator (DCO) is set to 1 MHz, providing clock source for MCLK and SMCLK, while the Basic Clock System+ is configured to set ACLK to 1.5 kHz.

Controller’s flash timing is obtained from MCLK divided by three to comply with the device specifications.

Port P1.0 is configured as an output and will blink the once LED every second.

The ADC10 is configured to use the input channel corresponding to the on-chip temperature sensor (channel A10). The configuration includes the activation of the internal reference voltage V REF+ = 1.5 V and the selection of ADC10OSC as clock signal. The converter is configured to perform a single-channel single-conversion. At the end of conversion, an interrupt is requested.

The Timer_A is configured to generate an interrupt once every second. ACLK/8 is selected as the clock signal using the VLOCLK as clock source and will count until the TACCR0 value is reached (in up mode). The system then enters into low power mode and waits for an interrupt.

Flash memory pointers and interrupt counters are initialized. The Timer_A ISR increments the variable counter and when this variable reaches the value 60 (1 minute), the software start of conversion is requested. At the end of this ISR, the system returns to low power mode.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
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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