1.1 Step 1: generate assembler code for pulse width controller

Write an assembler source code (shown in detail step 3, below) and save it as Lab9.psm . Assemble the source code using perl command listed in detailed step 5. Open lab9.mdl model from c:/xup/workshops/dsp_flow/labs/lab9 and assign fill_lab9_program_store to the ROM table.

• Open the MATLAB command window by double-clicking the MATLAB icon on your desktop, or go to Start Menu ->Programs ->MATLAB 6.5 ->MATLAB 6.5
• Change directory to c:/xup/workshops/dsp_flow/labs/lab9/ : Type cd c:/xup/workshops/dsp_flow/labs/lab9/ in the command window.
• Download the the code for Lab9.psm here.
• Save the file as Lab9.psm in c:/xup/workshops/dsp_flow/labs/lab9
• Type the following command in MATLAB command window: perl('xlpbsmble.pl','-p','Lab9.psm')
  This command will assemble several files and create sub-directories.

  What directories and files are produced as the result of running the perl command?

  • fill_lab9_program_store – an M-file
  • lab9_psm_results – folder which contains several files
  • assembler – results file
  • CONSTANT -
  • LAB9 – coe file
  • LAB9 – text file
  • LAB9.vhd – vhdl model file
  • LAB9.DEC – DEC file
  • LAB9.FMT – FMT file
  • LAB9.HEX – HEX file
  • lab9.psm – source file
  • LABELS – text file
  • Several PASS files
  • ROM_form – coe file
  • ROM_form – vhdl model file
  • Wrapkcpsm2.bat – batch file

• Open Lab9.mdl file. It will look as shown below in Figure 19-1.

  Figure 19-1: picoblaze based design

• Double-click the ROM block and change the Initial Value Vector as to use the fill_lab9_program_store