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c c project code tutorial for code composter studio ccs university of florida electrical computer eng march 2014 authors dr k gugel r jacobi introduction the purpose of this document ...

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                                                  'C/C++'	
  Project/Code	
  Tutorial	
  for	
  Code	
  Composter	
  Studio	
  (CCS)	
  
                                                                        University	
  of	
  Florida,	
  Electrical	
  &	
  Computer	
  Eng.	
  
                           March,	
  2014	
                                                                       	
                             Authors:	
  Dr.	
  K.	
  Gugel	
  &	
  R.	
  Jacobi	
  
                     Introduction 
                      
                     The purpose of this document is to explain how to create a 'C' or 'C++' code program in Code Composer Studio 
                     for Version 5.1 of the software. Students should be proficient in writing assembly code for the TMS320F28335 
                     DSP and now can use C/C++ coding for labs and projects. First, you will need to get the file ' sprc530.zip' from 
                     the class website or Texas Instruments website.  
                      
                     Procedure: 
                      
                           1.  Download sprc530.zip from TI.com or our class’ reference web page. 
                           2.  Extract the zip file. 
                           3.  Run "	
  setup_DSP2833x_v131.exe" - Choosing the default installation options is recommended. 
                           4.  Create  a  new  directory  for  your  C/C++  code  project,  and  copy  the  linker  command  file 
                                  "KG_RAM_Link1.cmd" into this directory. 
                           5.  Start Code Composer Studio. 
                           6.  Create a new CCS project. File > New > CCS Project 
                                         a.    Type in a name for your project, and make sure the output type is 'Executable' 
                                         b.  You can change the desired location for your project if you wish. 
                                         c.    Under "Device", make sure that the Family is set to C2000. The Variant should be set to Generic 
                                               C28xx Device. 
                                         d.  Under "Advanced Settings", make sure the linker file has been properly selected where it says 
                                               Linker command file. If it does not, browse and find the "KG_RAM_Link1.cmd" file to link it 
                                               to the project correctly. 
                                         e.    Under  "Project  templates  and  examples"  make  sure  you  select  an  Empty  Project,  not  the 
                                               Assembly-only Project that was used before. 
                                         f.    Finish Project creation now. 
                      
                                                                                                                                                            
                                              'C/C++'	
  Project/Code	
  Tutorial	
  for	
  Code	
  Composter	
  Studio	
  (CCS)	
  
                                                                  University	
  of	
  Florida,	
  Electrical	
  &	
  Computer	
  Eng.	
  
                         March,	
  2014	
                                                               	
                          Authors:	
  Dr.	
  K.	
  Gugel	
  &	
  R.	
  Jacobi	
  
                         7.  In the project browser window, right-­‐click the project name, select the Add Files… option and link the 
                               following          files      from       the      directory         created        by      the      setup_DSP2833x_v131.exe  program 
                               (C:\tidcs\c28\DSP2833x\v131\ if default location was selected): 
                                     a.    /DSP2833x_headers/cmd/DSP2833x_Headers_nonBIOS.cmd 
                                     b.  /DSP2833x_headers/source/DSP2833x_GlobalVariableDefs.c 
                                     c.    /DSP2833x_common/source/DSP2833x_ADC_cal.asm 
                                     d.  /DSP2833x_common/source/DSP2833x_CodeStartBranch.asm 
                                     e.    /DSP2833x_common/source/DSP2833x_DefaultIsr.c 
                                     f.    /DSP2833x_common/source/DSP2833x_Mcbsp.c 
                                     g.  /DSP2833x_common/source/DSP2833x_PieCtrl.c 
                                     h.  /DSP2833x_common/source/DSP2833x_PieVect.c 
                                     i.    /DSP2833x_common/source/DSP2833x_Spi.c 
                                     j.    /DSP2833x_common/source/DSP2833x_SysCtrl.c 
                                     k.  /DSP2833x_common/source/DSP2833x_usDelay.asm 
                    
                               Each time you will be prompted by the program about how the file should be imported: 
                    
                                                                                                                                         
                               Select the options as shown in the image above to link the files properly. 
                    
                               Note:  You  can  select  and  link  multiple  files  at  the  same  time  by  holding  down  'Ctrl'  while 
                               selecting each individual file. 
                    
                         8.  Next to go Project > Properties.  
                    
                                     a.    Go to Build > C2000 Compiler > Include Options. 
                                     b.  Next to “Add dir to #include search path (-­‐-­‐include_path, -­‐I)” select Add (left most button) and 
                                           add the following directories: 
                                                  i.   /tidcs/c28/DSP2833x/v131/DSP2833x_headers/include 
                                                 ii.   /tidcs/c28/DSP2833x/v131/DSP2833x_common/include 
                    
                                                                                                                                                             
                                  'C/C++'	
  Project/Code	
  Tutorial	
  for	
  Code	
  Composter	
  Studio	
  (CCS)	
  
                                                University	
  of	
  Florida,	
  Electrical	
  &	
  Computer	
  Eng.	
  
                  March,	
  2014	
                                           	
                  Authors:	
  Dr.	
  K.	
  Gugel	
  &	
  R.	
  Jacobi	
  
                                                                              
                  9.  Create a new Target Configuration File (same as what you have done for your previous assembly 
                       projects) for your lab DSP board, or copy it from a previous project and add it to this new project. 
               
              Now your Code Composer Studio is properly set-up for C/C++ code. The remainder of this tutorial will now 
              cover the basics of writing C/C++ code in CCS. Topics that are covered will be: Adding includes, useful starting 
              code,  using  the  auto-complete  feature  of  CCS  (which  runs  off  the  Eclipse  system),  how  to  use  pointers  for 
              memory addresses, how to use interrupt service routines, and tips on setting up the LCD screen in an efficient 
              manner. 
               
              Code Basics:	
   
               
              Note: For the remainder of this tutorial, all of the code examples will be for C++ code. 
               
              New Code File: 
               
              In order to make a new file for your C/C++ code do the following: 
               
                  1.  File > New > Source File 
                  2.  Type in the desired file name, such as "Example.cpp". Note that for a C file, you need to end the file 
                       name with .c, and for a C++ file, you need to end the file name with .cpp. 
                  3.  Select the correct language template in the Template drop down menu. 
               
              Includes: 
               
              Every C/C++ file should use the following include: 
               
                  •    #include "DSP28X_Project.h" 
               
              Beyond this, there are a number of useful includes you may want to use at certain times. Only use includes you 
              actually need though, as each one takes up space on the DSP's memory. 
               
                  •    #include "math.h" - Used for more advanced math functions such as sqrt and floor. 
                  •    #include "FPU.h" - This is a floating point header which you will need to download and link later in the 
                       semester for certain labs. 
               
              Starting code: 
               
              If you are writing in C or C++ you will need to declare the "main" function correctly. As mentioned above, this 
              tutorial will give examples for C++ code only. 
               
              int	
  main	
  {	
  
              	
       EALLOW;	
  //	
  Allows	
  for	
  I/O	
  pins	
  to	
  be	
  used	
  for	
  inputs	
  and	
  outputs.	
  
              	
       SysCtrlRegs.WDCR	
  =	
  0x0068;	
  //	
  Turns	
  off	
  the	
  Watchdog	
  timer.	
  
              }	
  
               
              As you can see, the code to remove the Watchdog timer has been reduced to a single line now, as opposed to 
              Assembly code which required writing to 0x7029 with 0x0068 over 3 lines of code instead. The EALLOW 
              function works the same as it did in Assembly. 
               
                                                  'C/C++'	
  Project/Code	
  Tutorial	
  for	
  Code	
  Composter	
  Studio	
  (CCS)	
  
                                                                        University	
  of	
  Florida,	
  Electrical	
  &	
  Computer	
  Eng.	
  
                           March,	
  2014	
                                                                       	
                             Authors:	
  Dr.	
  K.	
  Gugel	
  &	
  R.	
  Jacobi	
  
                     Since you will be using this processor for DSP application, having it run at a high clock speed will be very useful 
                     as  the  faster  clock  speeds  will  allow  the  processor  to  run  more  calculations  per  second  and  increase  the 
                     functionality of the device. In order to increase the clock speed use the following lines of code: 
                      
                                  SysCtrlRegs.PLLSTS.bit.DIVSEL	
  =	
  0;	
  
                     	
           SysCtrlRegs.PLLCR.bit.DIV	
  =	
  0xA;	
  
                     	
           SysCtrlRegs.PLLSTS.bit.DIVSEL	
  =	
  2;	
  
                      
                     With this code, the CPU's clock speed, SYSCLKOUT, will be bumped up to 75 MHz. In order to understand how 
                     this code works, look at Pages 58-61 of the DSP's manual (tms320f28335.pdf). Note that some functions may use 
                     the Low-Speed Clock (LSPCLK) instead. If that is the case, it will be up to you to determine how to adjust the 
                     LSPCLK.  
                      
                      
                     Auto-Complete Feature: 
                      
                     One of the best features of Code Composer Studio is that runs of the Eclipse architecture. As a result of this, there 
                     is very handy auto-complete feature which will simply writing C/C++ code especially at the beginning when you 
                     are still learning syntax. This allows you to modify many of the key registers including the GPIO Control and 
                     Data Registers, and the set-up and initialization registers for functions such as the SPI and the ADC. 
                      
                     In order to use this feature, you need to know the name of the register you are trying to modify. For this example, 
                     GpioCtrlRegs will be used. In order to trigger the auto-complete, type in "GpioCtrlRegs" and then type a single 
                     "." afterwards. If the set-up covered above was done correctly, you will see a menu similar to the one shown 
                     below. 
                      
                     Note: If the menu does not appear, it is likely that you either did not properly add all the include files, or that you 
                     did not correctly link the header files. 
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                     With this, it is possible to easily set individual bits as needed. It is also possible to set entire strings of bits in one 
                     line as well, by using .all instead of .bit. When setting more than a single bit you will need to use the datasheets to 
                     determine how wide the register so you know how many bits to place. The format of the string of bits is up to you, 
                     but using hexadecimal is recommended. 
                      
                      
                      
                      
                      
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...C project code tutorial for composter studio ccs university of florida electrical computer eng march authors dr k gugel r jacobi introduction the purpose this document is to explain how create a or program in composer version software students should be proficient writing assembly tmsf dsp and now can use coding labs projects first you will need get file sprc zip from class website texas instruments procedure download ti com our reference web page extract run setup dspx v exe choosing default installation options recommended new directory your copy linker command kg ram link cmd into start type name make sure output executable b change desired location if wish under device that family set variant generic cxx d advanced settings has been properly selected where it says does not browse find correctly e templates examples select an empty only was used before f finish creation browser window right click add files option following created by tidcs headers nonbios source globalvariabledefs c...

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