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PSIM
P M Tuttoria
al
Auto Code
C
Gener
G
ration ffor F28
833x T
Targett
Jaanuary 20155
-1-
Pow
wersim Inc.
www.powersimtech.com
Auto
A
Code Gen
neration for F
F2833x Targett
PSIM’s SimCoder
S
Module,
M
comb
bined with F2833x
F
Harddware Targett, can generaate ready-to--run
code for hardware baased on TI F2833x seriess floating-pooint DSP.
This tuto
orial describees, in step by
y step, how to
t generate ccode in PSIM
M, compile aand upload thhe code
in Code Composer
C
Studio (CCS)), and run it on
o the DSP.
To illustrrate the proccess, we use the circuit “T
TI 1-ch DC//DC buck.pssimsch’ as ann example. T
This
example is located in
n the sub-fold
der “examplles\SimCodeer\F2833x Taarget\TI 1-C
Ch DC-DC” in the
PSIM dirrectory.
To keep the
t original example uncchanged, wee will copy thhe whole follder to “c:\ T
TI 1-Ch DC--DC”,
and use this
t folder ass the working
g folder in th
his tutorial.
1. PSIM
M Setup for
fo Code Generation
G
n
In PSIM,, load the sch
hematic file “TI_DC_DC
C_Buck_1_cch.psimsch”” as shown below.
pared to other PSIM circu
uits not for code
c
generattion, this circcuit containss elements frrom the
As comp
F2833x Hardware
H
Taarget library. In this circu
uit, there aree two F2833x Hardware Target libraary
elements: a 16-chann
nel A/D conv
verter and a 1-phase PW
WM Generatoor, as shown below on thhe left.
33x Hardwarre Target lib
brary can be accessed byy going to Ellements >> SimCoder >
>>
The F283
F2833x Target.
T
A list of the librrary is shown
n below on tthe right.
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A
Code Gen
neration for F
F2833x Targett
F2833x Tarrget library lisst:
F283
335 Hardwaree elements
used in the circuit
Like any other circuiits, this circu
uit can be sim
mulated by sselecting Sim
mulate >> R
Run Simulattion.
1.1
Simulation Control
C
Parameters
Before peerforming th
he code geneeration, first define the pproject configguration for Code Compposer
Studio. Double
D
click on the Simu
ulation Contrrol block (thhe clock imaage). The Haardware Tarrget
should bee set to F283
33x. Click on
o the drop-d
down menu tto choose onne of the fouur project setttings. In
this case,, we will cho
oose RAM Debug,
D
as sho
own below.
ug setting, it is easy to deebug the pro gram and thhere is no neeed to write thhe
With the RAM Debu
program to the flash memory.
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A
Code Gen
neration for F
F2833x Targett
1.2
Generating
G
Code
C
To generrate code, sellect Simulatte >> Generrate Code. T
The generateed code will be displayedd in a
separate window, as shown below
w.
PSIM no
ot only generrates the cod
de, but also generates
g
all the necessarry project filles for four
configuraations: RAM
M Debug, RA
AM Release, Flash Releaase, and Flassh RAM Rellease. The prroject
file and all
a dependen
nt files are sto
ored in a sub
b-folder calleed “c:\TI 1-C
Ch DC-DC\
TI_DC_D
DC_Buck_1_ch (C codee)”.
2. CCS
S Setup
The PSIM
M generated project is fo
or CCS v3.3,, the Code C
Composer Stuudio from T
TI should be vversion
3.3 or hig
gher. If you are using CC
CS v3.3, the project can be opened ddirectly; If using CCS 4 or
higher, you
y need to use
u CCS’s Im
mport Legacyy v3.3 Projeect function. We use CC
CS v5.5 to shhow the
way to lo
oad and debu
ug the prograam in this do
ocument for the examplee.
2.1
Im
mport Projeect into CCS
Launch CCS
C v5.5, iff this is the fiirst time you
u load the prooject, you neeed to transffer CCS v3.33 project
to CCS v5.5
v project by
b go to Pro
oject >> Imp
port Legacyy CCSv3.3 P
Project. Thee following ddialog
pops up. click on "Brrowse..." buttton to choosse " C:\TI 1--Ch DC-DC\\TI_DC_DC
C_Buck_1_chh (C
code)\TI_
_DC_DC_B
Buck_1_ch.pjjt" then click
k "Next" buttton.
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A
Code Gen
neration for F
F2833x Targett
When thee following dialog
d
displaayed, click "Finish"
"
buttton to start pproject transffer.
If there iss no transferr problem, th
he transformed project w
will be autom
matically loadded. The CC
CS will
appear ass follows:
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A
Code Gen
neration for F
F2833x Targett
Note thatt the project configuratio
on is set to RAM
R
Debug . With this ssetting, all prrogram and ddata
will be lo
oaded to the RAM memo
ory.
2.2
Compiling
C
Code
C
To comp
pile the projeect, right mou
use click on the project nname ("TI_D
DC_DC_Buck_1_ch") inn the
pane of Project
P
Explo
orer, then cliick on "Build Project" inn the poppedd up menu. O
Or click on thhe
project name in the pane
p
of Projeect Explorer to select it aas the currennt project (thhe project nam
me
changes to
t bold) then
n select Projject >> Builld to build thhe project orr Project >> Rebuild Alll to
rebuild th
he whole pro
oject). After the compilin
ng is compleete, CCS willl display thee following:
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A
Code Gen
neration for F
F2833x Targett
The warn
ning message can be ignored. This warning
w
messsage is displlayed when pprogram is nnot
saved in the flash meemory.
2.3
C
on
Set Target Configuratio
oading a prog
gram to the target,
t
we neeed to createe a target connfiguration ffor the targett board
Before lo
(Assume that a TI’s TMS320F28
T
8335 controlCARD is ussed). Select V
View -> Tarrget
Configurrations, a paane of Targeet Configurattions displayys as followss in CCS.
Right mo
ouse click on
n "User Defiined" in the Target
T
Confi
figuration paane then select "New Tarrtget
Configurration" in thee popped up menu. A diaalog displayss as below.
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A
Code Gen
neration for F
F2833x Targett
Change the
t file namee as you wan
nt (here is "F
F2833x", thee file extensioon will be "cccxml"), then click
"Finish" button. A neew pane nam
med "F2833x
x.ccxml" dispplays in CCS
S as below.
nection" com
mbo box, cho
oose the emu
ulator you wiill use (for eexample, "Sppectrum Digiital
In "Conn
C2000 XDS510LC
X
Emulator"),
E
then
t
check "TMS320F288335" in thee list box of ""Board of Device".
Click "Saave" button to
t save the configuration
c
n.
Back to the
t "Target Configuratio
C
ons" pane, rig
ght mouse cllick on "F28833x.ccxml" configuratioon,
move mo
ouse to "Link
k File to Proj
oject" in the popped
p
up m
menu, all proojects will bee displayed iin the
sub-menu
u. Select "TII_DC_DC_B
Buck_1_ch" project, thenn check if "F
F2833x.ccxm
ml" is added to the
project in
n the "Projecct Explorer" pane. See beelow.
3. Targ
get Hardw
ware Setup
p
Insert TI’s TMS320F
F28335 contrrolCARD in
nto TI’s 2-Chhannel DC/D
DC Buck Coonverter Kit
DCDC2KIT)), as shown below.
b
(TMDSD
- 12 -
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A
Code Gen
neration for F
F2833x Targett
Connect the J1 conneector of the board
b
to the JTAG emullator, and theen connect thhe JTAG em
mulator
to the com
mputer’s US
SB port. Afteer connecting
g the power to the boardd, turn on Sw
witches SW11 and
SW2 on the
t board. Switch SW3 is
i for display
ying either C
Ch1 or Ch2 ooutput. Set S
SW3 to the C
Ch2
position.
4. Run
nning Codee in DSP Target
T
4.1
Load
L
Code to DSP Targ
get
In CCS, click
c
on "TI_
_DC_DC_B
Buck_1_ch" project
p
to seet it as the cuurrent projecct (the currennt
project name display
ys bold), then
n select Run
n >> Debug tto connect thhe computerr to the DSP. If the
connectio
on is successsful, the prog
gram will bee upload to thhe target, thee F28335 DS
SP will
automatically reset an
nd run to thee start place of main funnction as show
wn below.
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A
Code Gen
neration for F
F2833x Targett
4.2
Uploading
U
Code
C
to DSP (Flash Releease Version
n)
There aree 4 configuraation optionss in the geneerated projecct: RamReleaase, RamDebbug, FlashR
Release
and Flash
hRamReleasse. RamReleease and Ram
mDebug uplooad program
m to DSP RA
AM area; Insttead,
FlashRellease and FlaashRamRelease upload program
p
to D
DSP flash memory but F
FlashRamRellease
will automatically co
opy the progrram to RAM
M and all codde will be runn in RAM. T
To use a diffferent
configuraation, right mouse
m
click on the project name in thhe Project E
Explorer panee, move mouuse to
"Build Configuration
ns" in the pop
pped up men
nu and selecct a configuraation you waant as below
w.
mpiled again,, then the codde can be upploaded
After chaanging configuration, thee project neeed to be com
to the DS
SP with the same
s
method
d described at
a 5. Upload
ding Code too DSP (RAM
M Debug Veersion).
4.3
Run
R Code in
n DSP Targeet
To run th
he code in th
he DSP, we can
c use the to
oolbar in "D
Debug" pane as shown rigght to resum
me, stop,
step into,, step over an
nd step returrn to run the program.
5. Monitoring Waveform
W
s with PSIIM’s DSP Oscilloscope
At the en
nd of Section
ns Error! Reeference sou
urce not fou
und., the codde is runningg in the targeeted
DSP to generate
g
a co
onverter outp
put of 3.3V (+/-0.05V).
(
N
Now, one maay use PSIM
M’s DSP
- 14 -
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A
Code Gen
neration for F
F2833x Targett
Oscillosccope feature to monitor the
t variabless inside the D
DSP and to ccontrol the cconverter outtput
voltage.
Connect the SCI portt of the hardw
ware target to
t the compuuter.
Launch PSIM.
P
Selectt Utilities >>
> DSP Oscillloscope. Thhis will launcch the DSP O
Oscilloscopee as
shown beelow.
Set the co
orrect serial port numberr, baud rate, and parity ccheck. They must be idenntical to thesse in the
SCI Conffiguration bllock in the PSIM
P
circuit.
Click thee Connect bu
utton at the leeft bottom of the scope ppanel. All naames of SCI output and input
variabless will be listeed on the left
ft side of the panel, as shhown below.
- 15 -
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A
Code Gen
neration for F
F2833x Targett
The two variables av
vailable for monitoring
m
arre Vfdbk annd Ref_out. S
Select the vaariables to diisplay
on the scope screen.
To chang
ge the DC-D
DC converter output voltaage, modify the value Vrref to 2 and click the Up
pdate
button. The
T LED disp
play of the converter
c
boaard will channge to the neew value. Thhe figure bellow
shows the waveforms with the neew value of Vref.
V
6. Cod
de Composer Studio
o Referencces
For furth
her informatiion about thee Texas Instrrument’s Coode Composeer Studio, please refer too the
documen
nts in the link
ks below.
- 16 -
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A
Code Gen
neration for F
F2833x Targett

CCSv5
C
Getting
g Started GuideCCSv5 Getting Started Guide
htttp://processsors.wiki.ti.com/index..php/CCSv55_Getting_S
Started_Guide
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