The Student's Guide to VHDLThe Student's Guide to VHDL is a condensed edition of The Designer's Guide to VHDL, the most widely used textbook on VHDL for digital system modeling. The Student's Guide is targeted as a supplemental reference book for computer organization and digital design courses. Since publication of the first edition of The Student's Guide, the IEEE VHDL and related standards have been revised. The Designer's Guide has been revised to reflect the changes, so it is appropriate that The Student's Guide also be revised. In The Student's Guide to VHDL, 2nd Edition, we have included a design case study illustrating an FPGA-based design flow. The aim is to show how VHDL modeling fits into a design flow, starting from high-level design and proceeding through detailed design and verification, synthesis, FPGA place and route, and final timing verification. Inclusion of the case study helps to better serve the educational market. Currently, most college courses do not formally address the details of design flow. Students may be given informal guidance on how to proceed with lab projects. In many cases, it is left to students to work it out for themselves. The case study in The Student's Guide provides a reference design flow that can be adapted to a variety of lab projects. |
No grāmatas satura
1.5. rezultāts no 33.
68. lappuse
The syntax rules are as follows: case_statement ⇐ [ case_label : ] case expression is (when choices =>{ sequential_statement} ) {... } end case [ case_label ] ; choices ⇐ ( simple_expression I discrete_range I others) {| .
The syntax rules are as follows: case_statement ⇐ [ case_label : ] case expression is (when choices =>{ sequential_statement} ) {... } end case [ case_label ] ; choices ⇐ ( simple_expression I discrete_range I others) {| .
69. lappuse
Each alternative starts with the keyword when and is followed by one or more choices and a sequence of statements. The choices are values that are compared with the value of the selector expression. There must be exactly one choice for ...
Each alternative starts with the keyword when and is followed by one or more choices and a sequence of statements. The choices are values that are compared with the value of the selector expression. There must be exactly one choice for ...
70. lappuse
Another rule to remember is that the type of each choice must be the same as the type resulting from the selector expression ... We can include more than one choice in each alternative by writing the choices separated by the | symbol.
Another rule to remember is that the type of each choice must be the same as the type resulting from the selector expression ... We can include more than one choice in each alternative by writing the choices separated by the | symbol.
71. lappuse
In this example, if the value of opcode is anything other than the choices listed in the first and second alternatives, the last alternative is selected. There may only be one alternative that uses the others choice, ...
In this example, if the value of opcode is anything other than the choices listed in the first and second alternatives, the last alternative is selected. There may only be one alternative that uses the others choice, ...
72. lappuse
... the values of the choices depend on the value of the variable N. Since this might change during the course of execution, these choices are not locally static. Hence the case statement as written is illegal. On the other hand, ...
... the values of the choices depend on the value of the variable N. Since this might change during the course of execution, these choices are not locally static. Hence the case statement as written is illegal. On the other hand, ...
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Saturs
| 1 | |
| 31 | |
| 65 | |
Chapter 4 Composite Data Types and Operations | 95 |
Chapter 5 Basic Modeling Constructs | 135 |
Chapter 6 Subprograms | 201 |
Chapter 7 Packages and Use Clauses | 239 |
Chapter 8 Resolved Signals | 261 |
Chapter 12 Components and Configurations | 335 |
Chapter 13 Generate Statements | 359 |
Chapter 14 Design for Synthesis | 375 |
System Design Using the Gumnut Core 413 | 413 |
Appendix A Standard Packages | 437 |
Appendix B VHDL Syntax | 461 |
Appendix C Answers to Exercises | 479 |
References | 497 |
Chapter 9 Predefined and Standard Packages | 287 |
Chapter 10 Aliases | 315 |
Chapter 11 Generic Constants | 325 |
Index | 499 |
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actual alias allows alternative applied architecture body array assertion association attribute begin behavioral bit_vector boolean called changes Chapter character choices clause clock complex component condition configuration connected constant constrained contains conversion corresponding count defined delay described determine digit downto driver elements end process entity entity declaration example executed expression false function function function identifier implementation index range indication initial inout input instance instantiation instruction integer label literal logic loop memory natural Note object operand operations output package parameter port map predefined procedure range record refer represent reset resolved result selected shown signal assignment signed simulation specify standard statement std_ulogic string structural subtype syntax rule synthesis tool true unit unsigned variable vector versions VHDL wait width write
Bibliogrāfiskā informācija
| Nosaukums | The Student's Guide to VHDL |
| Autors | Peter J. Ashenden |
| Izdevums: | 2, pārstrādāts |
| Izdevējs | Elsevier, 2008 |
| ISBN | 0080948553, 9780080948553 |
| Apjoms | 528 lappuses |
| Eksportēt avotu | BiBTeX EndNote RefMan |