TMS320C5x DSP STARTER KIT USER'S GUIDE

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Directives That Initialize Memory5.5 Directives That Initialize MemoryEach of these directives, with the exception of the .byte and .string directives,aligns the object to a 16-bit word boundary. The .byte directive places one or more 8-bit values into consecutive wordsof the current section. The .word directive places one or more 16-bit values into consecutivewords in the current section. The .string directive places 8-bit characters from one or more characterstrings into the current section. The .long directive places one or more 32-bit values into consecutive32-bit fields in the current section. The .int directive places one or more 16-bit values into consecutive wordsin the current section. The .qxx directive places one or more 16-bit, signed 2s-complement valuesinto consecutive words in the current section. Note that the decimal pointis displaced xx places from the LSB. The .lqxx directive places one or more 32-bit, signed 2s-complement valuesinto consecutive 32-bit fields in the current section. Note that the decimalpoint is displaced xx places from the LSB. The .float directive calculates 32-bit IEEE floating-point representationsof single precision floating-point value and stores it in two consecutivewords in the current section. The .bfloat directive calculates a 16-bit, signed 2s-complement exponentand a 32-bit, signed 2s-complement mantissa. The .efloat directive calculates a 16-bit, signed 2s-complement exponentand a 16-bit, signed 2s-complement mantissa. The .tfloat directive calculates a 32-bit, signed 2s-complement exponentand a 64-bit, signed 2s-complement mantissa. The .double directive calculates a 64-bit IEEE floating-point representationof a double precision floating-point value and stores it in four consecutivewords in the current section.5-8
Directives That Initialize MemoryFigure 5–1. The .space Directive The .space directive reserves a specified number of bits in the currentsection. The assembler advances the SPC and skips the reserved words.When you use a label with .space, it points to the first word of the reservedblock.Figure 5–1 shows an example of the .space directives. Assume the followingcode has been assembled for this example:.ps 0a00h.word 100h, 200hRES_1: .space 30h ;Reserve 48 bits or 3 words.word 15Res_1 points to the first byte in the space reserved by .space.3 wordsreservedRes_1 = 0a02hAssembler Directives5-9
Page 1 and 2:
TMS320C5xDSP Starter KitUser’s Gu
Page 3 and 4:
PrefaceRead This FirstAbout This Ma
Page 5 and 6:
Notational Conventions / Informatio
Page 7 and 8: If You Need AssistanceIf You Need A
Page 9 and 10: ContentsContentsPart I: Hands-On In
Page 11: ContentsPart III: Debugger Descript
Page 14 and 15: Running Title—Attribute Reference
Page 16 and 17: Key Features1.1 Key FeaturesThis se
Page 18 and 19: Memory1.3 MemoryThe ’C5x DSK is o
Page 20 and 21: MemoryFigure 1-3. DSK to RS-232 Con
Page 22 and 23: What You’ll Need2.1 What You’ll
Page 24 and 25: What You’ll NeedDSK module connec
Page 26 and 27: Step 2: Installing the DSK Software
Page 28 and 29: Step 4: Modifying the PATH Statemen
Page 30 and 31: Step 5: Verifying the InstallationI
Page 32 and 33: Description of the DSK Assembler3.1
Page 34 and 35: Developing Code for the DSK3.3 Deve
Page 36 and 37: Getting Started2) Enter the followi
Page 38 and 39: Getting Started5) Now you are ready
Page 40 and 41: Creating DSK Assembler Source Files
Page 46 and 47: Symbols4.3 SymbolsSymbols are used
Page 48 and 49: Assembling Your Program4.5 Assembli
Page 50 and 51: 4-12
Page 52 and 53: Using the DSK Assembler Directives5
Page 54 and 55: Directives That Define Sections5.2
Page 56 and 57: Directives That Reference Other Fil
Page 60 and 61: Miscellaneous Directives5.6 Miscell
Page 62 and 63: .byte/.stringDirectives ReferenceSy
Page 64 and 65: .copy/.includeDirectives ReferenceL
Page 66 and 67: .endDirectives ReferenceSyntax.endD
Page 68 and 69: .float/.bfloat/.double/.efloat/.tfl
Page 70 and 71: .if/.else/.endifDirectives Referenc
Page 72 and 73: .liston/.listoffDirectives Referenc
Page 74 and 75: .lqxx/.qxxDirectives ReferenceSynta
Page 76 and 77: .mmregsDirectives ReferenceTable 5-
Page 78 and 79: .setDirectives ReferenceSyntax symb
Page 80 and 81: .spaceDirectives ReferenceListing f
Page 82 and 83: .text / .psDirectives ReferenceExam
Page 84 and 85: 5-34
Page 86 and 87: Invoking the Debugger6.1 Invoking t
Page 88 and 89: Invoking the DebuggerSetting the co
Page 90 and 91: Using Pulldown Menus in the Debugge
Page 98 and 99: Using Dialog BoxesYou can omit entr
Page 100 and 101: Using Software Breakpoints6.4 Using
Page 102 and 103: Quick-Reference Guide6.5 Quick-Refe
Page 104 and 105: Quick-Reference GuideTable 6-14.Deb
Page 106 and 107: Circuit Board DimensionsFigure A-1.
Page 108 and 109:
Schematic DiagramP1594837261CONNECT
Page 110 and 111:
Schematic DiagramEODR\OUT-AUXIN-TCL
Page 112 and 113:
GlossaryCWindows that show code, te
Page 114 and 115:
GlossaryIIC:Integrated circuit. A t
Page 116 and 117:
Glossarysingle step: A form of prog
Page 118 and 119:
Indexconditional assembly, directiv
Page 120 and 121:
IndexinitializingCPU registers 6-10
Page 122 and 123:
IndexTtag, definition B-6temporary
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TMS320C5x DSP STARTER KIT USER'S GUIDE

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