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This module describes the basics of the TI DSP/BIOS LOG module.


This module describes the basics of the TI DSP/BIOS LOG module.


  • SPRU423 TMS320 DSP/BIOS Users Guide: Read the section Event Log Manager (LOG Module)

Log module

When running a real-time application it is desirable to not interrupt the processing while attempting to monitor or debug code. Printing to the standard I/O is very time consuming on the processor. The LOG module helps reduce this time. Formatting of the display takes place on the host computer rather than on the DSP. Data is stored in real-time to a buffer on the DSP and then during idle time it is transferred to the host computer. On the host computer the print statements are formatted and displayed.

The main functions used in the LOG module are LOG_printf and LOG_printf4 . They work very similar to the C printf function. In order to print using the LOG module a LOG object must be defined. To create a new LOG object open the configuration file and right click on Instrumentation->LOG and select Insert LOG . This will create a LOG object called LOG0 . The name of the object can be changed. On the properties window for the object the buffer length is in words and sets the length of the buffer. The buffer can be either a circular buffer, which contains the last messages written to the object, or fixed, which contains the first messages written to the buffer. A circular buffer allows messages to be sent continually. Each message writes 4 words of data. The format of the function call is

LOG_printf(LOG_Obj *log,String format,arg0,arg1) LOG_printf4(LOG_Obj *log,String format,arg0,arg1,arg2,arg3);

where the String format is a usual C printf format string with the conversion characters given in Table 1.

Conversion Character Description
%d Signed integer
%x Unsigned hexadecimal integer
%u Unsigned integer
%o Unsigned octal integer
%s Character string. This character can only be used with constant string pointers.
%r Symbol from symbol table
%p pointer

When using objects defined with the configuration tool the code must include definitions of the objects and the header file log.h . The configuration tool generates a header file that contains the definitions. For instance, the file log.tcf would generate the file logcfg.h . If an object called LOG0 was created, then the file would contain

extern far LOG_Obj LOG0;

Include the configuration header file in your code and you won't need to make the definitions yourself. A call the the print function might look like this

LOG_printf(&LOG0,"Hello world");

To view the message log select Tools->RTA->Printf Logs .

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
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.
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
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
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what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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