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This module has details of assembly programming on the TI C6000 family of processors.

Introduction

This module contains details on how to program the TI C6000 family of processors in assembly. The C6000 family of processors has many variants. Therefore, it would not be possible to describe how to program all the processors here. However, the basic architecture and instructions are similar from one processor to another. They differ by the number of registers, the size of the registers, peripherals on the device, etc. This module will assume a device that has 32 general-purpose 32-bit registers and eight functional units, like the C6713 processor.

References

  • SPRU198: TMS320C6000 Programmer's Guide
  • SPRU186: TMS320C6000 Assembly Language Tools User's Guide 
  • SPRU733: TMS320C67x/C67x+ DSP CPU and Instruction Set Reference Guide

Overview of c6000 architecture

The C6000 consists of internal memory, peripherals (serial port, external memory interface, etc), and most importantly, the CPU that has the registers and the functional units for execution of instructions. Although you don't need to care about the internal architecture of the CPU for compiling and running programs, it is necessary to understand how the CPU fetches and executes the assembly instructions to write a highly optimized assembly program.

Core dsp operation

In many DSP algorithms, the Sum of Products or Multiply-Accumulate (MAC) operations are very common. A DSP CPU is designed to handle the math-intensive calculations necessary for common DSP algorithms. For efficient implementation of the MAC operation, the C6000 CPU has two multipliers and each of them can perform a 16-bit multiplication in each clock cycle. For example, if we want to compute the dot product of two length-40 vectors a[n] and x[n], we need to compute:

y = n = 1 N a [ n ] x [ n ] size 12{y= Sum cSub { size 8{n=1} } cSup { size 8{N} } {a \[ n \] x \[ n \]} } {}

(For example, the FIR filtering algorithm is exactly the same as this dot product operation.) When an a[n] and x[n]are stored in memory, starting from n=1, we need to compute a[n]x[n]and add it to y (y is initially 0) and repeat this up to n=40. In the C6000 assembly, this MAC operation can be written as:

MPY .M a,x,prod ADD .L y,prod,y

Ignore .M and .L for now. Here, a , x , prod and y are numbers stored in memory and the instruction MPY multiplies two numbers a and x together and stores the result in prod . The ADD instruction adds two numbers y and prod together storing the result back to y .

Instructions

Below is the structure of a line of assembly code.

Label: Parallel bars (||) [Condition] Instruction Unit Operands ;Comments

Labels identify a line of code or a variable and represent a memory address that contains either an instruction or data. The first character of a label must be must be in the first column and must be a letter or an underscore (_) followed by a letter. Labels can include up to 32 alphanumeric characters.

An instruction that executes in parallel with the previous instruction signifies this with parallel bars (||). This field is left blank for an instruction that does not execute in parallel with the previous instruction.

Questions & Answers

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
Maciej
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 ?
s.
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.
Tarell
what is the actual application of fullerenes nowadays?
Damian
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.
Tarell
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.
Virgil
is Bucky paper clear?
CYNTHIA
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.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
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
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
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
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
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
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit 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, Dsp lab with ti c6x dsp and c6713 dsk. OpenStax CNX. Feb 18, 2013 Download for free at http://cnx.org/content/col11264/1.6
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