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UM017105-0511 Configuring Memory for Your Program
Zilog Developer Studio II – ZNEO™
User Manual
301
Chapter 7. Configuring Memory for Your
Program
The ZNEO CPU architecture provides a single unified address space for both internal and
external memory and I/O. Several address ranges within this space can be configured for
various purposes, providing a great deal of flexibility for creating a program configuration
tailored to your target design and application needs. The cost of this flexibility is that you
must understand how to set up the project settings and initialization to support your pre-
ferred configuration. This chapter provides the information required to configure your
project to support the programming model that best fits your needs.
This chapter covers the following topics:
•
ZNEO Memory Layout – see page 301
•
Programmer’s Model of ZNEO Memory – see page 303
•
Program Configurations – see page 308
The first two sections describe the relationship between the ZNEO CPU’s physical mem-
ory layout and the functional address ranges available to the programmer. Understanding
this relationship is the key to correctly configuring your project. The last section presents
several examples of program configuration, covering the configurations that are expected
to be most commonly used.
ZNEO Memory Layout
The ZNEO CPU has a unique memory architecture with a unified 24-bit physical address
space. (ZNEO CPU effective addresses are 32 bits wide, but current devices ignore bits
[31:24].) The physical address space can address four types of memory and I/O, as fol-
lows:
•
Internal nonvolatile memory
•
Internal RAM
•
Internal I/O memory and special-function registers (SFRs)
•
External memory and memory mapped peripherals
The internal memory and I/O are always present in ZNEO devices, and are located at spe-
cific address ranges in the unified address space. External memory or I/O is optional, and
its location in the address space is determined by the target hardware design.
To promote code efficiency, the ZNEO CPU supports shorter 16-bit data addressing for
the address ranges
00_0000H-00_7FFFH and FF_8000H-FF_FFFFH. 32-bit addressing
- User Manual 1
- UM017105-0511 2
- Revision History 3
- ZDS II System Requirements 5
- Zilog Technical Support 7
- Table of Contents 9
- List of Figures 21
- List of Tables 27
- Chapter 1. Getting Started 29
- Add a File to the Project 34
- Set Up the Project 36
- 5. Click the 38
- Figure 10 39
- 7. Click the 39
- 9. Click the 40
- Development Environment 43
- Toolbars 44
- File Toolbar 45
- Build Toolbar 46
- Find Toolbar 47
- Command Processor Toolbar 47
- Debug Toolbar 48
- Debug Windows Toolbar 50
- Project Workspace Window 51
- Edit Window 52
- Using the Context Menus 53
- Using Bookmarks 54
- Output Windows 57
- Menu Bar 59
- File Menu 60
- Edit Menu 68
- Manage Breakpoints 71
- View Menu 72
- Project Menu 73
- Add Files 74
- Remove Selected File(s) 74
- Settings 74
- Menu Bar UM017105-0511 80
- UM017105-0511 Menu Bar 103
- Build Menu 111
- Manage Configurations 112
- Debug Menu 114
- Tools Menu 115
- Start Address 118
- Firmware Upgrade 119
- Show CRC 119
- Calculate File Checksum 120
- Customize 121
- Options—General Tab 124
- Options—Editor Tab 125
- Display Line Number Margin 129
- Show Auto Completion List 129
- Show Call Tips Window 129
- Support UNICODE 129
- Options—Debugger Tab 130
- Window Menu 132
- Shortcut Keys 133
- Edit Menu Shortcuts 134
- Project Menu Shortcuts 134
- Build Menu Shortcuts 135
- Debug Menu Shortcuts 135
- Shortcut Keys UM017105-0511 136
- Chapter 3. Using the Editor 137
- Identify and Correct Mistakes 138
- Auto Completion 139
- Include file list box 141
- Call Tips 143
- Auto Indentation 145
- , ifma, macro 146
- Multiple Clipboards 147
- Line and Block Comments 149
- Abbreviations and Expansions 149
- Adding an Abbreviation 152
- Modifying an Abbreviation 153
- Removing an Abbreviation 153
- Expanding an Abbreviation 154
- Long Line Indicator 157
- UNICODE Support 159
- Auto Syntax Styler 160
- Code Folding Margin 163
- Line Number Margin 165
- Type Info Tips 167
- Figure 111. Type Info Tips 168
- Wrap Long Lines 170
- Indentation Guides 171
- Zoom In/Out 173
- Bookmarks 173
- Opening an Include File 176
- Mismatched Brace Highlighting 179
- Auto Conversion of “.” to “→” 181
- Language Extensions 184
- Default Storage Specifiers 188
- Memory Models 189
- Interrupt Support 190
- Interrupt Vector Setup 191
- Placement Directives 192
- String Placement 193
- Inline Assembly 194
- Char and Short Enumerations 195
- Type Sizes 197
- Predefined Macros 198
- Examples 199
- Calling Conventions 200
- Run Time Stack 201
- Special Cases 202
- Function Naming Convention 202
- Argument Locations 203
- Return Values 203
- Preserving Registers 204
- Assembly File 204
- Command Line Options 205
- Run-Time Library 205
- Zilog Header Files 206
- Zilog Functions 208
- SET_VECTOR 212
- Stack Pointer Overflow 214
- Startup Files 215
- Segment Naming 216
- Linker Referenced Files 218
- Linker Symbols 219
- Sample Linker Command File 220
- ANSI Standard Compliance 222
- Deviations from ANSI C 223
- Double Treated as Float 224
- Warning and Error Messages 225
- Address Spaces and Segments 240
- Segments 241
- Output Files 242
- Source Listing (.lst) Format 243
- Source Language Structure 244
- Comment Line 245
- Label Field 245
- Instruction 245
- Directive 245
- Assembler Rules 246
- Expressions 248
- Relational Operators 249
- Boolean Operators 249
- LOW and LOW16 Operators 249
- Decimal Numbers 250
- Hexadecimal Numbers 250
- Binary Numbers 250
- Octal Numbers 250
- Character Constants 251
- Operator Precedence 251
- Instruction Alignment 253
- Directives 254
- .COMMENT 255
- Data Directives 256
- BLKW Declaration Type 257
- DB Declaration Type 257
- DL Declaration Type 257
- DW Declaration Type 258
- DW24 Declaration Type 258
- ALIGN Clause 259
- ORG Clause 259
- SPACE Clause 260
- .SHORT_STACK_FRAME 264
- .TAG Directive 269
- .UNION Directive 270
- .WITH and .ENDWITH Directives 271
- Conditional Assembly 272
- Macro Definition 275
- Concatenation 276
- Macro Invocation 277
- Local Macro Labels 277
- Optional Macro Arguments 277
- Exiting a Macro 278
- Anonymous Labels 279
- Local Labels 279
- Label Spaces 279
- Source Language Syntax 280
- Linker Functions 287
- Invoking the Linker 288
- Linker Commands 288
- MAXHEXLEN 295
- MAXLENGTH 296
- SEARCHPATH 298
- SEQUENCE 298
- SPLITTABLE 299
- UNRESOLVED IS FATAL 300
- WARNING IS FATAL 300
- Linker Expressions 301
- & (And) 302
- BASE OF Versus LOWADDR OF 303
- COPY BASE 304
- COPY TOP 304
- / (Divide) 304
- HIGHADDR 305
- * (Multiply) 306
- Decimal Numeric Values 306
- Hexadecimal Numeric Values 306
- << (Shift Left) 307
- >> (Shift Right) 307
- - (Subtract) 307
- Sample Linker Map File 308
- Troubleshooting the Linker 323
- ZNEO Memory Layout 329
- Unconventional Memory Layouts 335
- Program Configurations 336
- C Program Setup 338
- Assembly Program Setup 338
- Chapter 8. Using the Debugger 355
- Status Bar 356
- Code Line Indicators 356
- Debug Windows 357
- Clock Window 359
- Memory Window 359
- Change Values 360
- View or Search for an Address 361
- Fill Memory 362
- Save Memory to a File 363
- Load a File into Memory 363
- Watch Window 365
- Add New Variables 366
- Remove an Expression 366
- View a Hexadecimal Value 366
- Locals Window 367
- Call Stack Window 368
- Symbols Window 368
- Disassembly Window 369
- Simulated UART Output Window 370
- Using Breakpoints 371
- Inserting Breakpoints 372
- Viewing Breakpoints 372
- Moving to a Breakpoint 373
- Enabling Breakpoints 373
- Disabling Breakpoints 374
- Removing Breakpoints 374
- from the context menu 375
- Command Line 377
- Compiler Command Line Options 382
- Linker Command Line Options 385
- Processor 387
- Sample Command Script File 391
- Assembler Options 404
- Compiler Options 405
- Debugger Options 406
- General Options 406
- Librarian Options 406
- Linker Options 407
- Executing Flash Commands 416
- Standard Header Files 420
- Errors <errno.h> 421
- Diagnostics <assert.h> 422
- Limits <limits.h> 423
- Mathematics <math.h> 426
- Hyperbolic 427
- Exponential 427
- Functions 429
- Input/Output <stdio.h> 430
- Standard Functions 435
- Synopsis 438
- Glossary 487
- Glossary UM017105-0511 494
- UM017105-0511 Index 495
- Numerics 496
- Index UM017105-0511 498
- File toolbar 17 503
- OMF695 format 215, 216 511
- Index UM017105-0511 518
- Customer Support 519
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