Texas Instruments TMS320C6000 User Manual

TMS320C6000 DSK
Board Support Library
API User’s Guide
Literature Number: SPRU432A
October 2001
Printed on Recycled Paper

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About This Manual

Preface

Read This First

The TMS320C6000t DSK Board Support Library (BSL) is a set of application programming interfaces (APIs) used to configure and control all on-board de­vices. It is intended to make it easier for developers by eliminating much of the tedious grunt-work usually needed to get algorithms up and running in a real system.
Some of the advantages offered by the BSL include: device ease of use, a level of compatibility between devices, shortened development time, portability, some standardization, and hardware abstraction. A version of the BSL is avail­able for the TMS320C6711t Developers Starter Kit (DSK).
This document is organized as follows:
- Introduction – a high level overview of the BSL
- Six BSL API module chapters
- Glossary

How to Use This Manual

The information in this document describes the contents of the TMS320C6000t board support library (BSL) as follows:
- Chapter 1 provides an overview of the BSL, includes a table showing BSL
- Each additional chapter discusses an individual BSL API module and pro-
API module support for various C6000 devices, and lists the API modules.
vides:
J A description of the API module J A table showing the APIs within the module and a page reference for
more specific information
J A module API Reference section in alphabetical order listing the BSL
API functions, enumerations, type definitions, structures, constants, and global variables. Examples are given to show how these elements are used.
Read This First
iii
How to Use This Manual
Notational Conventions / Related Documentation From Texas Instruments

Notational Conventions

This document uses the following conventions:
- Program listings, program examples, and interactive displays are shown
in a special typeface.
- In syntax descriptions, the function or macro appears in a bold typeface
and the parameters appear in plainface within parentheses. Portions of a syntax that are in bold should be entered as shown; portions of a syntax that are within parentheses describe the type of information that should be entered.
- Macro names are written in uppercase text; function names are written in
lowercase.
- TMS320C6000 devices are referred to throughout this reference guide as
C6201, C6202, etc.

Related Documentation From Texas Instruments

The following books describe the TMS320C6x devices and related support tools. To obtain a copy of any of these TI documents, call the Texas Instru­ments Literature Response Center at (800) 477–8924. When ordering, please identify the book by its title and literature number. Many of these documents can be found on the Internet at http://www.ti.com.
TMS320C62x/C67x Technical Brief (literature number SPRU197) gives an
introduction to the C62x/C67x digital signal processors, development tools, and third-party support.
TMS320C6000 Chip Support Library API User’s Guide (literature number
SPRU401) describes the chip support library (CSL), a library dedicated for initialization and control of the on-chip peripherals.
TMS320C6000 CPU and Instruction Set Reference Guide (literature
number SPRU189) describes the ’C6000 CPU architecture, instruction set, pipeline, and interrupts for these digital signal processors.
TMS320C6000 Peripherals Reference Guide (literature number SPRU190)
describes common peripherals available on the TMS320C6000 digital signal processors. This book includes information on the internal data and program memories, the external memory interface (EMIF), the host port interface (HPI), multichannel buffered serial ports (McBSPs), direct memory access (DMA), enhanced DMA (EDMA), expansion bus, clock­ing and phase-locked loop (PLL), and the power-down modes.
iv
How to Use This Manual
TMS320C6000 Programmer’s Guide (literature number SPRU198)
describes ways to optimize C and assembly code for the TMS320C6000 DSPs and includes application program examples.
TMS320C6000 Assembly Language Tools User’s Guide (literature number
SPRU186) describes the assembly language tools (assembler, linker, and other tools used to develop assembly language code), assembler directives, macros, common object file format, and symbolic debugging directives for the ’C6000 generation of devices.
TMS320C6000 Optimizing C Compiler User’s Guide (literature number
SPRU187) describes the ’C6000 C compiler and the assembly optimizer. This C compiler accepts ANSI standard C source code and produces as­sembly language source code for the ’C6000 generation of devices. The assembly optimizer helps you optimize your assembly code.
TMS320C62x DSP Library (literature number SPRU402) describes the 32
high-level, C-callable, optimized DSP functions for general signal proc­essing, math, and vector operations.
TMS320C62x Image/Video Processing Library (literature number
SPRU400) describes the optimized image/video processing functions including many C-callable, assembly-optimized, general-purpose image/video processing routines.
Read This First
v

Contents

Contents
1 BSL Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provides an overview of the board support library (BSL), describes its beneficial features, and lists each of its API modules.
1.1 BSL Introduction 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 BSL API Modules 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1 BSL API Module Support 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.2 Using BSL Handles 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 BSL Project Settings 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.1 User’s Program Setting 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.2 Compiler Options 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.3 Linker Options 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 AD535 API Module 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provides a description of the AD535 API module, lists the individual APIs within the module, and includes a reference section with the API functions, structures, and constants that are ap­plicable to this module.
2.1 AD535 API Module Description 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 AD535 API Reference 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 BOARD API Module 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provides a description of the BOARD API module, lists the individual APIs within the module, and includes a reference section showing the API functions and constants that are applicable to this module.
3.1 BOARD API Module Description 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 BOARD API Reference 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 BSL API Module 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provides a description of the BSL API module and includes a reference section showing the single API function within this module.
4.1 BSL API Module Description 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 BSL API Reference 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vii
Contents
5 DIP API Module 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provides a description of the DIP API module, lists the individual APIs within the module, and includes a reference section showing the single API function and constant within this module.
5.1 DIP API Module Description 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 DIP API Reference 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 FLASH API Module 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provides a description of the FLASH API module, lists the individual APIs within the module, and includes a reference section showing the API functions and constants that are applicable to this module.
6.1 FLASH API Module Description 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 FLASH API Reference 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 LED API Module 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provides a description of the LED API module, lists the individual APIs within the module, and includes a reference section showing the API functions and constants that are applicable to this module.
7.1 LED API Module Description 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 LED API Reference 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A Glossary A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
viii
Tables

Tables

1–1. BSL Modules and Include Files 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2. BSL Support Library Name and Symbol Conventions 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–3. BSL API Module Support for 6711 DSK 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–1. AD535 API Summary 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–1. BOARD API Summary 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–1. BSL API Function 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5–1. DIP API Summary 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6–1. FLASH API Summary 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7–1. LED API Summary 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents
ix
Chapter 1

BSL Overview

This chapter provides an overview of the board support library (BSL), de­scribes its beneficial features, and lists each of its API modules.
Topic Page
1.1 BSL Introduction 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 BSL API Modules 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 BSL Project Settings 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1

BSL Introduction

1.1 BSL Introduction
The BSL provides a C-language interface for configuring and controlling all on­board devices. The library consists of discrete modules that are built and ar­chived into a library file. Each module represents an individual API and is re­ferred to simply as an API module. The module granularity is architected such that each device is covered by a single API module except the I/O Port Module, which is divided into two API modules: LED and DIP.

How The BSL Benefits You

The BSL’ s beneficial features include device ease of use, shortened develop­ment time, portability, hardware abstraction, and a level of standardization and compatibility among devices. In general, the BSL makes it easier for you to get your algorithms up and running in the shortest length of time.
1-2
1.2 BSL API Modules
For each on-board device, one header file and one source file will be gener­ated with the following names: bsl_device.h and bsl_device.c.
Also, a library will be built for a given board: i.e: bsl6711dsk.lib Note : The soource files.c are archived into a single source file bsl.src. Table 1–1 provides a current list of BSL API Modules.
Table 1–1. BSL Modules and Include Files

BSL API Modules

Board Module
BSL Top-level module: Initialization of the BSL bsl_bsl.h BSL_init BOARD Board-specific module – can call CSL at run-
AD535 Audio codec module (C6711 DSK) bsl_ad535.h AD535_SUPPORT DIP Dip switches module bsl_dip.h DIP_SUPPORT FLASH Flash ROM module bsl_flash.h FLASH_SUPPORT LED
Description Include File
bsl_board.h BOARD_SUPPORT
time
LED module bsl_led.h LED_SUPPORT
Module Support Symbol

Interdependencies

Although each API module is unique, there exists some interdependency be­tween the CSL (Chip Support Library) and BSL modules. For example, the AD535 module depends on the MCBSP module because MCBSP0 is dedi­cated to serial communication.

1.2.1 BSL API Module Support

Not all API modules are supported on all boards. For example, the AIC10 mod­ule is not supported on the C6711 DSK because the board does not have an AIC10 codec. When an API module is not supported, all of its header file infor­mation is conditionally compiled out, meaning the declarations will not exist. Because of this, calling an AIC10 API function on a board that does not support AIC10 results in a compiler and/or linker error.
Note: AIC10 codec is implemented on C5510evm.
BSL Overview
1-3
BSL API Modules

6711 DSK Module Support

Table 1–3 shows which board each API module is supported on. Currently , all modules described in the following chapters are supported by the C6711 DSK. In the future, more APIs supported by other platforms will be added to the BSL.
Table 1–2. BSL Support Library Name and Symbol Conventions
Board BSL library BSL Symbol CSL library CSL symbol
6711DSK bsl6711.lib BOARD_6711DSK csl6711.lib CHIP_6711
Table 1–3. BSL API Module Support for 6711 DSK
Module 6711 DSK
AD535 X BOARD X DIP X FLASH X LED X

1.2.2 Using BSL Handles

Handles are required for devices present more than once. For example, only one AD535 codec is implemented on-board and associated with mcbsp0; however, you can use a second AD535 implemented on a daughter board and make data transfers through mcbsp1.
1-4
1.3 BSL Project Settings

1.3.1 User’s Program Setting

Due to the interdependancies between CSL and BSL, the CSL is initialized by calling the CSL_init() function followed by the BSL initialization function, BSL_init().
Also, the two header files <csl.h> and <bsl.h> have to be included in your pro­gram in order for you to have access to the BSL APIs.

1.3.2 Compiler Options

In the Compiler Option window, the Chip and Board symbols have to be de­fined using the –d switch. For example,
–dCHIP_6711 –dBOARD_6711DSK
Also, the paths of the “Include” folder containing the BSL and CSL header files have to be set with the –i switch.

BSL Project Settings

1.3.3 Linker Options

The paths of the CSL and BSL libraries have to be defined. The two libraries are named, respectively, csl6711.lib and bsl6711dsk.lib.
Note: Device Identification Symbol
When using the BSL, it is up to the user to define a project-wide symbol from a predetermined set to identify which device is being used. This board identi­fication symbol is then used in the BSL header files to conditionally define the support symbols. (See Section 3.2, API Reference, for more information.
BSL Overview
1-5
Chapter 2

AD535 API Module

This chapter provides a description of the AD535 API module, lists the individ­ual APIs within the module, and includes a reference section showing the API functions, structures, and constants that are applicable to this module.
Topic Page
2.1 AD535 API Module Description 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 AD535 API Reference 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1

AD535 API Module Description

2.1 AD535 API Module Description
The AD535 module (audio codec supported by the C6711 DSK) serves as a level of abstraction such that it works the same for all AD535s supported on TI EVM/DSKs.
To use an AD535 device, you must first open it and obtain a device handle us­ing AD535_open(). Once opened, use the device handle to call the other API functions. The codec may be configured by passing an AD535_Config struc­ture to AD535_config().
Table 2–1. AD535 API Summary
Syntax Type Description Page
AD535_close F Closes the AD535 module 2-5 AD535_Config S The AD535 configuration structure used to set up an
AD535 codec
AD535_config F Sets up the AD535 codec using the register value
passed in AD535_freeMcbsp F Sets the FREE bit of an McBSP serial port to 1. 2-6 AD535_getMcbspHandle F Returns the Handle of the McBSP associated with the
codec previously opened AD535_Id S The AD535 Identity Structure used to allocate the
Codec device and the associated McBSP AD535_inGain F Sets the AD535’s input gain 2-10 AD535_micGain F Sets the microphone preamplifier gain 2-10 AD535_modifyReg F Modifies the AD535 control registers 2-11 AD535_open F Opens an AD535 codec for use 2-12 AD535_outGain F Sets the AD535’s output gain 2-13 AD535_powerDown F Puts the AD535 in power-down mode 2-13 AD535_read F Reads received data (voice channel) 2-14 AD535_readHwi F Reads received data (voice channel) 2-14
2-5
2-6
2-8
2-8
AD535_readReg F Reads the contents of AD535 control registers 2-14 AD535_reset F Resets the AD535 2-16 AD535_SUPPORT
2-2
C A compile time constant whose value is 1 if the board
supports the AD535 module
2-16
AD535 API Module Description
PageDescriptionTypeSyntax
AD535_write F Writes data to be sent 2-16 AD535_writeHwi F Writes data to be sent 2-17 AD535_writeReg
Note: F = Function; C = Constant; S = Structure; T = Typedef
F Writes to the AD535 control registers 2-17
AD535 API Module
2-3

2.2 AD535 API Reference

AD535_Config

AD535_close

Closes codec channel
Function Void AD535_close(
AD535_Handle hAD535 );
Arguments hAD535 Handle to codec channel, see AD535_open() Return Value none Description This function closes a codec channel previously opened via
AD535_open(). The registers for the codec are set to their power-on defaults.
Example AD535_close(hAD535);
AD535_Config
Configuration structure used to set up codec channel
Structure AD535_Config Members AD535_Loopback lb_mode Loopback mode:
- AD535_LOOPBACK_DISABLE
- AD535_LOOPBACK_ANALOG
- AD535_LOOPBACK_DIGITAL
AD535_MicGain mic_gain Microphone preamp gain:
- AD535_MICGAIN_OFF
- AD535_MICGAIN_ON
Float in_gain ADC input gain:
- AD535_GAIN_MUTE
- AD535_GAIN_0DB
- –36 dB <= gain <= 12 dB
(in 1.5 dB steps)
Float out_gain DAC output gain:
- AD535_GAIN_MUTE
- AD535_GAIN_0DB
- –36 dB <= gain <= 12 dB
(in 1.5 dB steps)
AD535 API Module
2-5

AD535_config

Description This is the AD535 configuration structure used to set up a codec channel.
You create and initialize this structure and then pass its address to the AD535_config() function.
Example AD535_Config myConfig = {
AD535_LOOPBACK_DISABLE, AD535_MICGAIN_OFF, AD535_GAIN_0DB, AD535_GAIN_0DB }; AD535_config(hAD535,&myConfig);
AD535_config
Function Void AD535_config(
Arguments hAD535 Handle to codec channel, see AD535_open()
Return Value none Description Sets up the AD535 using the configuration structure. The values of the
Example AD535_Config myConfig = {
Sets up AD535 using configuration structure
AD535_Handle hAD535, AD535_Config *config );
Config Pointer to an initialized configuration structure, see
AD535_Config
structure are written to the AD535 control registers.
AD535_LOOPBACK_DISABLE, AD535_MICGAIN_OFF, AD535_GAIN_0DB, AD535_GAIN_0DB }; AD535_config(hAD535,&myConfig);

AD553_freeMcbsp

Function Void AD535_freeMcbsp(
Arguments port McBSP port: MCBSP_DEV0, MCBSP_DEV1 Return Value none
2-6
Sets the FREE bit of an McBSP serial port to 1
int port )
AD553_freeMcbsp
Description Sets 1 to the FREE field of the SPCR register of the given McBSP port.
When FREE is set to 1, the serial clocks continue to run during an emulation halt.
Example /* Set the FREE bit of Mcbsp serial port 0 */
AD535_freeMcbsp (MCBSP_DEV0);
AD535 API Module
2-7

AD535_getMcbspHandle

AD535_getMcbsp Handle
Function Mcbsp_Handle AD535_getMcbspHandle(
Arguments hAD535 Handle to codec channel, see AD535_open() Return Value Mcbsp_handle Handle to the opened McBSP associated to the
Description Returns the McBSP Handle associated with the McBSP used for AD535
Example Mcbsp_Handle hMcbsp;

AD535_Id

Structure AD535_Id
Returns McBSP Handle
AD535_Handle hAD535, );
number of McBSP.
communication. Note: The Mcbsp_Handle type is defined in the Chip Suppport Library
(CSL) and created by the internal call of the MCBSP_open() function.
hMcbsp = AD535_getHandleMcbsp(hAD535);
Allocates codec channel
Members Typedef Struct {
Struct { int mcbsp_no;
} Id; Struct { Boolean allocated; MCBSP_Handle
hMcbsp; } Obj; } AD535_Id
2-8
The typedef structure AD535_Id includes 2 substructures such as Id and Obj structures
The internal structure Id contains the field mcbsp_no. The member mcbsp_no contains the number of the serial port you wish to use.
The internal structure Obj contains the boolean field to allocate the codec and the McBSP handle associated with the number of the McBSP which will be open “mcbsp_no”.
AD535_Id
Description This AD535_Id structure is used to allocate a codec channel. You create
and initialize this structure, then pass its address to the AD535_open() function. Also, this structure allows you to access to the McBSP handle through the AD535_getMcbspHandle() function after calling AD535_open().
If you wish to use the AD535 codec implemented on C6711DSK you can pass the predefined pointer AD535_ON_6711DSK
The predefined pointer AD535_locald associates the codec to the mcbsp0 directly. It’s not necessary to define AD535_Id pointer.
mcbsp_no variable is set to 0 (mcbsp0) See source file bsl_ad535.c
Example /* the codec of C6711DSK use the predfined pointer
AD535_ON_6711DSK*/ AD535_Handle hAD535; Mcbsp_Handle hMcbsp;
hAD535 = AD535_open(AD535_ON_6711DSK); hMcbsp = AD535_getHandleMcbsp(hAD535);
To set up your own AD535_Id, for example:
/* set up a codec using McBSP 1 */ AD535_Handle hAD535; AD535_Id myId; myId.Id.mcbsp_no = 1; Mcbsp_Handle hMcbsp1;
.
hAD535 = AD535_open(*myId); hMcbsp1 = AD535_getHandleMcbsp(hAD535);
Note: You can also use the Mcbsp1 if you haven;t opened an AD535 handle with the predefined AD535_ON_6711DSK object.
AD535 API Module
2-9

AD535_inGain

AD535_inGain
Sets AD535’s input gain
Function void AD535_inGain(
AD535_Handle hAD535, float inGain );
Arguments hAD535 Handle to codec channel, see AD535_open()
inGain ADC input gain.
Return Value none Description Sets the AD535’s input gain.
6711 DSK
- AD535_GAIN_MUTE
- AD535_GAIN_0DB
- –36 dB <= inGain <= 12 dB (in 1.5 dB steps)
Example AD535_inGain (hAD535,6.0);

AD535_micGain

Sets microphone preamplifier gain
Function void AD535_micGain(
AD535_Handle hAD535, AD535_MicGain micGain );
Arguments hAD535 Handle to codec channel, see AD535_open()
micGain Microphone preamplifier gain enumeration.
Return Value none Description Sets the microphone preamplifier gain.
6711 DSK
- AD535_MICGAIN_OFF = off, 0 dB
- AD535_MICGAIN_ON = on, 20 dB
Example AD535_micGain(hAD535,AD535_MICGAIN_OFF);
2-10

AD535_modifyReg

AD535_modifyReg
Modifies specified control register
Function void AD535_modifyReg(
AD535_Handle hAD535, AD535_Reg ad535Register, Uint32 val, Uint32 mask );
Arguments hAD535 Handle to codec channel, see AD535_open()
ad535Register Control register enumeration:
- AD535_REG_CTRL0
- AD535_REG_CTRL1
- AD535_REG_CTRL2
- AD535_REG_CTRL3
- AD535_REG_CTRL4
- AD535_REG_CTRL5
val Value to be masked into register mask Bit-value mask. A value of 1 sets the bit to the
corresponding value in Val; a 0 keeps the current value of the bit.
Return Value none Description Modifies the specified control register according to the bit mask (Mask)
and value (Val). 6711 DSK Note: Only the Voice channel is available on this board. This means the
changes to control registers 0, 1, and 2 will have no effect on the operation of the codec.
Example To modify the ADC voice input gain in control register 4:
AD535_modifyReg(hAD535,AD535_REG_CTRL4,0x001F,0x003F);
AD535 API Module
2-11

AD535_open

AD535_open
Function AD535_Handle AD535_open (
Arguments myId Pointer to an object of type AD535_Id. This object
Return Value AD535_Handle Handle to newly opened codec channel
Description Before a codec channel can be used, it must first be opened by this
Example To use the local codec:
Opens codec channel
AD535_Id *myId );
contains the McBSP channel number and a McBSP handle.
C6711 DSK
If you want to use the local codec, you may pass the predefined pointer AD535_ON_6711DSK. If you
want
to use another codec you must create your own AD535_Id.
Note: If the board does not support this function, it will return the invalid handle INV.
function. Once opened, it cannot be opened again until closed. See
AD535_close().
AD535_Handle hAD535; hAD535 = AD535_open(AD535_ON_6711DSK);
2-12
To set up your own AD535_Id, for example:
/* set up a codec using McBSP 1 */ AD535_Handle hAD535; AD535_Id myId; myId.Id.mcbsp_no = 1; hAD535 = AD535_open(*myId);

AD535_powerDown

AD535_outGain

Sets AD535’s output gain
Function void AD535_outGain(
AD535_Handle hAD535, float outGain );
Arguments hAD535 Handle to codec channel, see AD535_open()
outGain DAC output gain.
Return Value none Description Sets the AD535’s output gain.
6711 DSK
- AD535_GAIN_MUTE
- AD535_GAIN_0DB
- –36 dB <= outGain <= 12 dB (in 1.5 dB steps)
Example AD535_outGain(hAD535,AD535_GAIN_0DB);
AD535_powerDown
Enables AD535’s power-down mode
Function void AD535_powerDown(
AD535_Handle hAD535 );
Arguments hAD535 Handle to codec channel, see AD535_open() Return Value none Description Enables the AD535’s power down mode. This performs a software power
down, so the control registers retain their previous values.
Example AD535_powerDown(hAD535);
AD535 API Module
2-13

AD535_read

AD535_read
Function int AD535_read(
Arguments hAD535 Handle to codec channel, see AD535_open() Return Value int Value returned from output of ADC. Description Returns the value of the ouput from the ADC. Example int val;

AD535_readHwi

Function int AD535_readHwi(
Arguments hAD535 Handle to codec channel, see AD535_open() Return Value int Value returned from output of ADC. Description Allows the user to read the output value of ADC. Unlike the AD535_read
Returns value of ouput from ADC
AD535_Handle hAD535 );
val = AD535_read(hAD535);
Display Code at Selected Address
AD535_Handle hAD535 );
API, it does not use polling to establish that the McBSP is ready for another sample. Rather, it requires the McBSP to always be ready. In other words, the AD535_readHwi routine is for use with an Interrupt Service Routine. The fact that you arrived at an McBSP receive ISR signifies that the McBSP is ready with another sample.
Example /* The function is included in the ISR associated to
McBSP receive event REVT */ void AD535_readIsr(){
Uint16 val; val = AD535_readHwi(hAD535); }

AD535_readReg

Function Uint32 AD535_readReg(
Arguments hAD535 Handle to codec channel, see AD535_open()
2-14
Returns value of specified control register
AD535_Handle hAD535, AD535_Reg ad535Register );
ad535Register Control register enumeration:
- AD535_REG_CTRL0
- AD535_REG_CTRL1
- AD535_REG_CTRL2
- AD535_REG_CTRL3
- AD535_REG_CTRL4
- AD535_REG_CTRL5
Return Value Uint32 Value of specified control register. Description Returns the value of the specified control register. Example Uint32 controlRegVal;
controlRegVal = AD535_readReg(hAD535, AD535_REG_CTRL3);
AD535_readReg
AD535 API Module
2-15

AD535_reset

AD535_reset
Function void AD535_reset(
Arguments hAD535 Handle to codec channel, see AD535_open() Return Value none Description Asserts a software reset and sets all the registers to their power-on default
Example AD535_reset(hAD535);

AD535_SUPPORT

Constant AD535_SUPPORT Description Compile time constant that has a value of 1 if the board supports the
Asserts software reset
AD535_Handle hAD535 );
values.
Compile time constant
AD535 module and 0 otherwise. You are not required to use this constant. Currently, all devices support this module.
Example #if (AD535_SUPPORT)
/* do AD535 operations */ #endif

AD535_write

Function void AD535_write(
Arguments hAD535 Handle to codec channel, see AD535_open()
Return Value none Description Writes value to the input of the DAC. Example To read from the codec and write back the same value, use:
2-16
Writes value to input of DAC
AD535_Handle hAD535, int val );
val Value to be written to DAC.
AD535_write(hAD535,AD535_read(hAD535));

AD535_writeReg

AD535_writeHwi

Writes value to input of DAC
Function void AD535_writeHwi(
AD535_Handle hAD535, int val );
Arguments hAD535 Handle to codec channel, see AD535_open()
val Value to be written to DAC.
Return Value none Description Writes value to the input of the DAC. Unlike the AD535_write API, it
does not use polling to establish that the McBSP is ready to write another sample. Rather, it requires the McBSP to already be ready. In other words, the AD535_writeHwi is for use within an Interrupt Service Routine. The face that you arrived at an McBSP transmit ISR signifies that the McBSP is ready with another sample.
Example /* The function is included in the ISR associated to
McBSP receive event XEVT */ void AD535_writeIsr(){
Uint val = 0x0066; AD535_writeHwi(hAD535,val); }
AD535_writeReg
Writes value to specified control register
Function void AD535_writeReg(
AD535_Handle hAD535, AD535_Reg ad535Register, Uint32 val );
Arguments hAD535 Handle to codec channel, see AD535_open()
ad535Register Control register enumeration:
- AD535_REG_CTRL0
- AD535_REG_CTRL1
- AD535_REG_CTRL2
- AD535_REG_CTRL3
- AD535_REG_CTRL4
- AD535_REG_CTRL5
val Value to be written to specified register
Return Value none
AD535 API Module
2-17
AD535_writeReg
Description Writes value to the specified control register.
6711 DSK Note: Only the Voice channel is available on this board. This means the
changes to control registers 0, 1, and 2 will have no effect on the operation of the codec.
Example /* Set up 10.5db ADC input gain and 0dB microphone
preamp gain in control register 4 */ AD535_writeReg(hAD535, AD535_REG_CTRL4, 0x0040);
2-18
Chapter 3

BOARD API Module

This chapter provides a description of the BOARD API module, lists the individ­ual APIs within the module, and includes a reference section showing the API functions and constants that are applicable to this module.
Topic Page
3.1 BOARD API Module Description 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 BOARD API Reference 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1

BOARD API Module Description

3.1 BOARD API Module Description
The BOARD module is where we put board-specific content. This module has the potential to grow in the future as more boards are placed on the market. Currently, the module has some API functions for register access such as BOARD_readReg(), and BOARD_writeReg().
A predefined symbol is associated with each EVM/DSK, for example,
BOARD_6711DSK ( –d switch for compiler options setting)
Table 3–1. BOARD API Summary
Syntax Type Description Page
BOARD_readReg F Reads a specified.BOARD memory–mapped register 3-3 BOARD_SUPPORT C A compile time constant whose value is 1 if the board
supports the BOARD module
BOARD_writeReg
Note: F = Function; C = Constant; S = Structure; T = Typedef
F Writes into a specified Board memory–mapped
register
3-3
3-4
3-2

3.2 BOARD API Reference

BOARD_SUPPORT

BOARD_readReg

Function Uint32 BOARD_readReg(
Arguments boardRegister Register enumeration
Return Value Uint32 Returns specified register value Description Returns the value of the specified memory-mapped register. Example Uint32 boardRegVal;
BOARD_SUPPORT
Constant BOARD_SUPPORT Description Compile time constant that has a value of 1 if the board supports the
Returns value of specified memory-mapped register
BOARD_Reg boardRegister );
C6711 DSK
- BOARD_REG_IOPORT
boardRegVal = BOARD_readReg(BOARD_REG_IOPORT);
Compile time constant
different modules via MODULE_SUPPORT constants and 0 otherwise. You are not required to use this constant.
Currently, all devices support this module.
Example #if (BOARD_SUPPORT)
/* do DIP operations */ #endif
BOARD API Module
3-3

BOARD_writeReg

BOARD_writeReg
Function void BOARD_writeReg(
Arguments boardRegister Register enumeration
Return Value none Description Writes the value to the specified memory-mapped register. Example BOARD_writeReg(BOARD_REG_IOPORT, 0x00000000);
Writes value to specified memory-mapped register
BOARD_Reg boardRegister, Uint32 val );
C6711 DSK
- BOARD_REG_IOPORT
val Value to be written to specified register.
3-4
Chapter 4

BSL API Module

This chapter provides a description of the BSL API module and includes a ref­erence section showing the single API function within this module.
Topic Page
4.1 BSL API Module Description 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 BSL API Reference 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1

BSL API Module Description

4.1 BSL API Module Description
The BSL module serves to initialize the API modules supported by the board.The following unique function has to be called before using the API func­tions:
BSL_init ()
Table 4–1. BSL API Function
Syntax Type Description Page
BSL_init F Initializes the BSL library 4-3
Note: F = Function; C = Constant; S = Structure; T = Typedef
4-2

4.2 BSL API Reference

BSL_init

BSL_init
Initializes all programmable modules on board
Function void BSL_init(); Arguments none Return Value none Description This function initializes all of the programmable modules on the board.
C6711 DSK
- AD535 Codec
- BOARD module
- DIP switch
- FLASH ROM
- User LEDs
Example BSL_init();
BSL API Module
4-3
Chapter 5

DIP API Module

This chapter provides a description of the DIP API module, lists the individual APIs within the module, and includes a reference section showing the single API function and constant within this module.
Topic Page
5.1 DIP API Module Description 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 DIP API Reference 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1

DIP API Module Description

5.1 DIP API Module Description
This module has the following single API for reading DIP switch positions:
DIP_get(dip#) returns a boolean value {0,1}.
Table 5–1. DIP API Summary
Syntax Type Description Page
DIP_get F Reads the status of the DIP switches 5-3 DIP_SUPPORT C A compile time constant whose value is 1 if the board
supports the DIP module
Note: F = Function; C = Constant; S = Structure; T = Typedef
5-3
5-2

5.2 DIP API Reference

DIP_SUPPORT

DIP_get

Returns current value of specified DIP switch
Function Uint32 DIP_get(
Uint32 dipNum );
Arguments dipNum Specifies which DIP switch to be read, can be one of
the following:
- DIP_1
- DIP_2
- DIP_3
-
Return Value Uint32 Current value of the specified DIP switch.
- 0 = DIP switch position is off.
- 1 = DIP switch position is on.
Description Returns the current value of the specified DIP switch.
C6711 DSK
- DIP_1 = USER_SW1
- DIP_2 = USER_SW2
- DIP_3 = USER_SW3
Example Uint32 val;
val = DIP_get(DIP_1);
DIP_SUPPORT
Compile time constant
Constant DIP_SUPPORT Description Compile time constant that has a value of 1 if the board supports the DIP
module and 0 otherwise. You are not required to use this constant. Currently, all devices support this module.
Example #if (DIP_SUPPORT)
/* do DIP operations */ #endif
DIP API Module
5-3
Chapter 6

FLASH API Module

This chapter provides a description of the FLASH API module, lists the individ­ual APIs within the module, and includes a reference section showing the API functions and constants that are applicable to this module.
Topic Page
6.1 FLASH API Module Description 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 FLASH API Reference 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1

FLASH API Module Description

6.1 FLASH API Module Description
The FLASH module allows access to on-board flash and executes data memory manipulation by using the following three functions:
FLASH_read(), FLASH_write() and FLASH_erase()
For the 6711 DSK, the 128KB FLASH is split into 128 bytes per page.
Table 6–1. FLASH API Summary
Syntax Type Description Page
FLASH_checksum F Returns the check sum 6-3 FLASH_erase F Erases the specific segment of the flash and/or erases
the full flash
FLASH_read F Reads the Flash data and copies it to a specified
destination buffer
FLASH_SUPPORT C A compile time constant whose value is 1 if the board
supports the FLASH module
FLASH_write
Note: F = Function; C = Constant; S = Structure; T = Typedef
F Writes to Flash data from a specified source buffer 6-6
6-4
6-5
6-6
6-2

6.2 FLASH API Reference

FLASH_checksum

FLASH_checksum
Returns checksum of specified Flash data
Function Uint32 FLASH_checksum(
Uint32 locator, Uint32 length );
Arguments locator Addressing and page information for location in Flash
memory. C6711 DSK
- FLASH_START_ADDR
- FLASH_PAGE_ADDR(x) :(x)– page number
- 32-bit FLASH address
length Length in bytes of data to be read. This is limited by the
size of the Flash memory.
Return Value Uint32 Returns the value of the specified checksum Description Returns the checksum of the specified Flash data. Checksum calculated
by byte by byte addition. Note: This function does not affect unspecified segments of Flash. For
example, altering the lower half of a page of Flash memory does not change the value of the upper half page.
C6711 DSK
- locator contains 32-bit address of Flash location
-FLASH_START_ADDR is 0x9000000
- Flash address range: 0x90000000 to 0x90020000
- FLASH_PAGE_SIZE = 0x80: 128 bytes
- Page number range x: 0 to 1023
-FLASH_PAGE_ADDR(x) = FLASH_START_ADDR +
x*FLASH_PAGE_SIZE ) Note: On 5x boards, 16-bit addressing is used and page information is
included in the upper half-word of the address argument.
Example To get the checksum of page 0 and 1, use:
Uint32 startAddr = FLASH_PAGE_ADDR(0); Uint32 length = FLASH_PAGE_SIZE * 2; Uint32 checksum; checksum = FLASH_checksum(startAddr,length);
FLASH API Module
6-3

FLASH_erase

FLASH_erase
Erases specified segment of Flash memory
Function void FLASH_erase(
Uint32 locator, Uint32 length );
Arguments locator Addressing and page information for location in Flash
memory. C6711 DSK
- FLASH_START_ADDR
- FLASH_PAGE_ADDR(x) :(x)– page number
- 32-bit Flash address
length Length in bytes of data to be erased. This is limited by
the size of the Flash memory. C6711 DSK
- length in bytes
- FLASH_ERASE_ALL – erase entire FLASH
Return Value none Description Erases the specified segment of Flash memory.
Note: This function does not affect unspecified segments of Flash. For example, altering the lower half of a page of Flash memory does not change the value of the upper half page.
C6711 DSK
- locator contains 32-bit address of Flash location
-FLASH_START_ADDR is 0x9000000
- Flash address range: 0x90000000 to 0x90020000
- FLASH_PAGE_SIZE = 0x80: 128 bytes
- Page number range: 0 to 1023
-FLASH_PAGE_ADDR(x) = FLASH_START_ADDR +
x*FLASH_PAGE_SIZE ) Note: On 5x boards, 16-bit addressing is used and page information is
included in the upper half-word of the address argument.
Example To erase page # 0 and # 1 in the Flash:
FLASH_erase(FLASH_PAGE_ADDR(0), FLASH_PAGE_SIZE*2);
To erase the entire FLASH:
FLASH_erase(0, FLASH_ERASE_ALL);
Note: When erasing the entire Flash memory, the locator argument becomes a dummy parameter.
6-4

FLASH_read

FLASH_read
Reads data from FLASH address
Function void FLASH_read(
Uint32 locator, Uint32 dst, Uint32 length );
Arguments locator Addressing and page information for location in Flash
memory. C6711 DSK
- FLASH_START_ADDR
- FLASH_PAGE_ADDR(x) :(x)– page number
- 32-bit FLASH address
dst Destination address length Length in bytes of data to be read. This is limited by the
size of the Flash memory.
Return Value none Description Reads data from the FLASH address (locator) and copies it to a
destination address (dst). This function is limited only by the length of the FLASH memory.
Note: This function does not affect unspecified segments of Flash. For example, altering the lower half of a page of Flash memory does not change the value of the upper half page.
C6711 DSK
- locator contains 32-bit address of Flash location
-FLASH_START_ADDR is 0x9000000
- Flash address range: 0x90000000 to 0x90020000
- FLASH_PAGE_SIZE = 0x80: 128 bytes
- Page number range: 0 to 1023
-FLASH_PAGE_ADDR(x) = FLASH_START_ADDR +
x*FLASH_PAGE_SIZE )
Example To read from pages 0 and 1 to readBuffer:
char readBuffer[FLASH_PAGE_SIZE*2]; FLASH_read(FLASH_PAGE_ADDR(0), (Uint32)readBuffer, FLASH_PAGE_SIZE * 2);
FLASH API Module
6-5

FLASH_SUPPORT

FLASH_SUPPORT
Constant FLASH_SUPPORT Description Compile time constant that has a value of 1 if the board supports the
Example #if (FLASH_SUPPORT)

FLASH_write

Function int FLASH_write(
Arguments src Source address
Compile time constant
FLASH module and 0 otherwise. You are not required to use this constant. Currently, all devices support this module.
/* do FLASH operations */ #endif
Writes data to Flash address
Uint32 src, Uint32 locator, Uint32 length );
locator Addressing and page information for location in Flash
memory. C6711 DSK
- FLASH_START_ADDR
- FLASH_PAGE_ADDR(x) :(x)– page number
- 32-bit FLASH address
length Length in bytes of data to be written. This is limited by
Return Value none
6-6
the size of the Flash memory.
FLASH_write
Description Writes data to the Flash address (locator) from a source address (src).
This function is limited by the page length of the Flash memory. Note: This function does not affect unspecified segments of Flash. For
example, altering the lower half of a page of Flash memory does not change the value of the upper half page.
C6711 DSK
- Locator contains 32-bit address of Flash location
-FLASH_START_ADDR is 0x9000000
- Flash address range: 0x90000000 to 0x90020000
- FLASH_PAGE_SIZE = 0x80: 128 bytes
- Page number range: 0 to 1023
-FLASH_PAGE_ADDR(x) = FLASH_START_ADDR +
x*FLASH_PAGE_SIZE )
- If the source address begins in the middle of a page, the write will
invalidate all other data on the page.
Example To write from writeBuffer to pages 1 and 2:
char writeBuffer[FLASH_PAGE_SIZE*2]; FLASH_write((Uint32)writeBuffer, FLASH_PAGE_ADDR(1), FLASH_PAGE_SIZE * 2);
FLASH API Module
6-7
Chapter 7

LED API Module

This chapter provides a description of the LED API module, lists the individual APIs within the module, and includes a reference section showing the API functions and constants that are applicable to this module.
Topic Page
7.1 LED API Module Description 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 LED API Reference 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-1

LED API Module Description

7.1 LED API Module Description
This module has a simple API for configuring on-board LED outputs. Three states can be set by the following functions:
- LED_on(led#)
- LED_off(led#)
- LED_toggle(led#)
Table 7–1. LED API Summary
Syntax Type Description Page
LED_off F Turns off the specified LED 7-3 LED_on F Turns on the specified LED 7-3 LED_SUPPORT C A compile time constant whose value is 1 if the board
supports the LED module
LED_toggle F Toggles the specified LED 7-4
Note: F = Function; C = Constant; S = Structure; T = Typedef
7-4
7-2

7.2 LED API Reference

LED_on

LED_off

Turns off specified LED
Function void LED_off(
Uint32 LedNum );
Arguments LedNum Specifies which LED to be turned off. Can be one of
the following:
- LED_1
- LED_2
- LED_3
-
Return Value none Description Turns off the specified LED.
C6711 DSK
- LED_1 = USER_LED1
- LED_2 = USER_LED2
- LED_3 = USER_LED3
- LED_ALL = all user LEDs
Example If you want to turn off LED # 1 use:
LED_off(LED_1);
LED_on
Turns on specified LED
Function void LED_on(
Uint32 LedNum );
Arguments LedNum Specifies which LED to be turned on. Can be one of
the following:
- LED_1
- LED_2
- LED_3
-
Return Value none
LED API Module
7-3

LED_SUPPORT

Description Turns on the specified LED.
C6711 DSK
- LED_1 = USER_LED1
- LED_2 = USER_LED2
- LED_3 = USER_LED3
- LED_ALL = all user LEDs
Example If you want to turn on LED # 1 use:
LED_on(LED_1);
LED_SUPPORT
Compile time constant
Constant LED_SUPPORT Description Compile time constant that has a value of 1 if the board supports the LED
module and 0 otherwise. You are not required to use this constant. Currently, all devices support this module.
Example #if (LED_SUPPORT)
/* do LED operations */ #endif

LED_toggle

Toggles specified LED
Function void LED_toggle(
Uint32 LedNum );
Arguments LedNum Specifies which LED to be toggled, can be one of the
following:
- LED_1
- LED_2
- LED_3
-
Return Value none Description Toggles the specified LED.
C6711 DSK
- LED_1 = USER_LED1
- LED_2 = USER_LED2
- LED_3 = USER_LED3
- LED_ALL = all user LEDs
Example If you want to toggle LED # 1 use:
LED_toggle(LED_1);
7-4
A
Appendix A
Appendix A

Glossary

AD535: The audio codec API module. Currently supported by the
6711 DSK.
address: The location of program code or data stored; an individually
accessible memory location.
A-law companding: See compress and expand (compand). API: See application programming interface. API module: A set of API functions designed for a specific purpose. application programming interface (API): Used for proprietary applica-
tion programs to interact with communications software or to conform to protocols from another vendor’s product.
B
assembler: A software program that creates a machine language program
from a source file that contains assembly language instructions, direc­tives, and macros. The assembler substitutes absolute operation codes for symbolic operation codes and absolute or relocatable addresses for symbolic addresses.
assert: To make a digital logic device pin active. If the pin is active low, then
a low voltage on the pin asserts it. If the pin is active high, then a high voltage asserts it.
bit: A binary digit, either a 0 or 1. big endian: An addressing protocol in which bytes are numbered from left
to right within a word. More significant bytes in a word have lower num­bered addresses. Endian ordering is specific to hardware and is deter­mined at reset. See also little endian.
A-1
Glossary
C
block: The three least significant bits of the program address. These corre-
spond to the address within a fetch packet of the first instruction being addressed.
BOARD: The BOARD-specific API Module. board support library (BSL): The BSL is a set of application programming
interfaces (APIs) consisting of target side DSP code used to configure and control board level peripherals.
boot: The process of loading a program into program memory. boot mode: The method of loading a program into program memory. The
C6x DSP supports booting from external ROM or the host port interface (HPI).
BSL: See board support library. byte: A sequence of eight adjacent bits operated upon as a unit.
cache: A fast storage buffer in the central processing unit of a computer. cache module: CACHE is an API module containing a set of functions for
managing data and program cache.
cache controller: System component that coordinates program accesses
between CPU program fetch mechanism, cache, and external memory.
CCS: Code Composer Studio. central processing unit (CPU): The portion of the processor involved in
arithmetic, shifting, and Boolean logic operations, as well as the genera­tion of data- and program-memory addresses. The CPU includes the central arithmetic logic unit (CALU), the multiplier , and the auxiliary regis­ter arithmetic unit (ARAU).
CHIP: See CHIP module. CHIP module: The CHIP module is an API module where chip-specific and
device-related code resides. CHIP has some API functions for obtaining device endianess, memory map mode if applicable, CPU and REV IDs, and clock speed.
chip support library (CSL): The CSL is a set of application programming
interfaces (APIs) consisting of target side DSP code used to configure and control all on-chip peripherals.
A-2
Glossary
clock cycle: A periodic or sequence of events based on the input from the
external clock.
clock modes: Options used by the clock generator to change the internal
CPU clock frequency to a fraction or multiple of the frequency of the input clock signal.
code: A set of instructions written to perform a task; a computer program or
part of a program.
codec: Coder-decoder, or compression/decompression. A device that
codes in one direction of transmission and decodes in another direction of transmission.
coder-decoder or compression/decompression (codec): A device that
codes in one direction of transmission and decodes in another direction of transmission.
compiler: A computer program that translates programs in a high-level lan-
guage into their assembly-language equivalents.
compress and expand (compand): A quantization scheme for audio sig-
nals in which the input signal is compressed and then, after processing, is reconstructed at the output by expansion. There are two distinct com­panding schemes: A-law (used in Europe) and µ-law (used in the United States).
D
constant: A fixed or invariable value or data item that can be used as an op-
erand.
control register: A register that contains bit fields that define the way a de-
vice operates.
control register file: A set of control registers. CSL: See chip support library. CSL module: The CSL module is the top-level CSL API module.It interfaces
to all other modules and its main purpose is to initialize the CSL library.
DAT: Data; see DAT module. DAT module: The DAT is an API module that is used to move data around
by means of DMA/EDMA hardware. This module serves as a level of ab­straction that works the same for devices that have the DMA or EDMA peripheral.
Glossary
A-3
Glossary
device ID: Configuration register that identifies each peripheral component
interconnect (PCI).
digital signal processor (DSP): A semiconductor that turns analog sig-
nals—such as sound or light—into digital signals, which are discrete or discontinuous electrical impulses, so that they can be manipulated.
DIP: The DIP Switches API Module. direct memory access (DMA): A mechanism whereby a device other than
the host processor contends for and receives mastery of the memory bus so that data transfers can take place independent of the host.
DMA : See direct memory access. DMA module: DMA is an API module that currently has two architectures
used on C6x devices: DMA and EDMA (enhanced DMA). Devices such as the 6201 have the DMA peripheral, whereas the 6211 has the EDMA peripheral.
DMA source: The module where the DMA data originates. DMA data is read
from the DMA source.
E
DMA transfer: The process of transferring data from one part of memory to
another. Each DMA transfer consists of a read bus cycle (source to DMA holding register) and a write bus cycle (DMA holding register to destina­tion).
DSK: Digital signal processor (DSP) starter kit. Tools and documentation
provided to new DSP users to enable rapid use of the product.
EDMA: Enhanced direct memory access; see EDMA module. EDMA module: EDMA is an API module that currently has two architectures
used on C6x devices: DMA and EDMA (enhanced DMA). Devices such as the 6201 have the DMA peripheral, whereas the 6211 has the EDMA peripheral.
EMIF: See external memory interface; see also EMIF module. EMIF module: EMIF is an API module that is used for configuring the EMIF
registers.
evaluation module (EVM): Board and software tools that allow the user to
evaluate a specific device.
A-4
F
Glossary
external interrupt: A hardware interrupt triggered by a specific value on a
pin.
external memory interface (EMIF): Microprocessor hardware that is used
to read to and write from off-chip memory.
fetch packet: A contiguous 8-word series of instructions fetched by the CPU
and aligned on an 8-word boundary.
flag: A binary status indicator whose state indicates whether a particular
condition has occurred or is in effect.
FLASH: The FLASH ROM API Module. frame: An 8-word space in the cache RAMs. Each fetch packet in the cache
resides in only one frame. A cache update loads a frame with the re­quested fetch packet. The cache contains 512 frames.
G
H
I
global interrupt enable bit (GIE): A bit in the control status register (CSR)
that is used to enable or disable maskable interrupts.
host: A device to which other devices (peripherals) are connected and that
generally controls those devices.
host port interface (HPI): A parallel interface t hat t he CP U u ses t o c ommu-
nicate with a host processor.
HPI: See host port interface; see also HPI module. HPI module: HPI is an API module used for configuring the HPI registers.
Functions are provided for reading HPI status bits and setting interrupt events.
index: A relative offset in the program address that specifies which of the
512 frames in the cache into which the current access is mapped.
Glossary
A-5
Glossary
indirect addressing: An addressing mode in which an address points to
another pointer rather than to the actual data; this mode is prohibited in RISC architecture.
instruction fetch packet: A group of up to eight instructions held in memory
for execution by the CPU.
internal interrupt: A hardware interrupt caused by an on-chip peripheral. internal peripherals: Devices connected to and controlled by a host device.
The C6x internal peripherals include the direct memory access (DMA) controller, multichannel buffered serial ports (McBSPs), host port inter­face (HPI), external memory-interface (EMIF), and runtime support tim­ers.
interrupt: A signal sent by hardware or software to a processor requesting
attention. An interrupt tells the processor to suspend its current opera­tion, save the current task status, and perform a particular set of instruc­tions. Interrupts communicate with the operating system and prioritize tasks to be performed.
interrupt service fetch packet (ISFP): A fetch packet used to service inter-
rupts. If eight instructions are insufficient, the user must branch out of this block for additional interrupt service. If the delay slots of the branch do not reside within the ISFP, execution continues from execute packets in the next fetch packet (the next ISFP).
A-6
interrupt service routine (ISR): A module of code that is executed in re-
sponse to a hardware or software interrupt.
interrupt service table (IST) A table containing a corresponding entry for
each of the 16 physical interrupts. Each entry is a single-fetch packet and has a label associated with it.
IRQ: Interrupt request; see IRQ module. IRQ module: IRQ is an API module that manages CPU interrupts. IST: See interrupt service table.
L
least significant bit (LSB): The lowest-order bit in a word. LED: The LED API Module. linker: A software tool that combines object files to form an object module,
which can be loaded into memory and executed.
M
Glossary
little endian: An addressing protocol in which bytes are numbered from right
to left within a word. More significant bytes in a word have higher-num­bered addresses. Endian ordering is specific to hardware and is deter­mined at reset. See also big endian.
µ-law companding: See compress and expand (compand). maskable interrupt: A hardware interrupt that can be enabled or disabled
through software.
MCBSP: See multichannel buffered serial port; see also MCBSP module. MCBSP module: MCBSP is an API module that contains a set of functions
for configuring the McBSP registers.
memory map: A graphical representation of a computer system’s memory,
showing the locations of program space, data space, reserved space, and other memory-resident elements.
memory-mapped register: An on-chip register mapped to an address in
memory. Some memory-mapped registers are mapped to data memory, and some are mapped to input/output memory.
N
O
most significant bit (MSB): The highest order bit in a word. multichannel buffered serial port (McBSP): An on-chip full-duplex circuit
that provides direct serial communication through several channels to external serial devices.
multiplexer: A device for selecting one of several available signals.
nonmaskable interrupt (NMI): An interrupt that can be neither masked nor
disabled.
object file: A file that has been assembled or linked and contains machine
language object code.
off chip: A state of being external to a device. on chip: A state of being internal to a device.
Glossary
A-7
Glossary
P
R
peripheral: A device connected to and usually controlled by a host device. program cache: A fast memory cache for storing program instructions al-
lowing for quick execution.
program memory: Memory accessed through the C6x’s program fetch in-
terface.
PWR: Power; see PWR module. PWR module: PWR is an API module that is used to configure the power-
down control registers, if applicable, and to invoke various power-down modes.
random-access memory (RAM): A type of memory device in which the
individual locations can be accessed in any order.
register: A small area of high speed memory located within a processor or
electronic device that is used for temporarily storing data or instructions. Each register is given a name, contains a few bytes of information, and is referenced by programs.
A-8
reduced-instruction-set computer (RISC): A computer whose instruction
set and r elated d ecode m echanism a re m uch s impler t han t hose o f m icro­programmed complex instruction set computers. The result is a higher instruction throughput and a faster real-time interrupt service response from a smaller, cost-effective chip.
reset: A means of bringing the CPU to a known state by setting the registers
and control bits to predetermined values and signaling execution to start at a specified address.
RTOS Real-time operating system.
S
structure: A collection of one or more variables grouped together under a
single name.
synchronous-burst static random-access memory (SBSRAM): RAM
whose contents does not have to be refreshed periodically. Transfer of data is at a fixed rate relative to the clock speed of the device, but the speed is increased.
T
Glossary
synchronous dynamic random-access memory (SDRAM): RAM whose
contents is refreshed periodically so the data is not lost. Transfer of data is at a fixed rate relative to the clock speed of the device.
syntax: The grammatical and structural rules of a language. All higher-level
programming languages possess a formal syntax.
system software: The blanketing term used to denote collectively the chip
support libraries and board support libraries.
tag: The 18 most significant bits of the program address. This value corre-
sponds to the physical address of the fetch packet that is in that frame.
timer: A programmable peripheral used to generate pulses or to time
events.
TIMER module: TIMER is an API module used for configuring the timer reg-
isters.
W
word: A multiple of eight bits that is operated upon as a unit. For the ‘C6x,
a word is 32 bits in length.
Glossary
A-9

Index

Index
A
AD535 API module, 2-1
API constant, 2-5
AD535_SUPPORT, 2-16
API functions
AD535_close, 2-5 AD535_config, 2-6 AD535_getMcbspHandle, 2-8 AD535_inGain, 2-10 AD535_micGain, 2-10 AD535_modifyReg, 2-11 AD535_open, 2-12 AD535_outGain, 2-13 AD535_powerDown, 2-13 AD535_read, 2-14 AD535_readReg, 2-14 AD535_reset, 2-16 AD535_write, 2-16 AD535_writeReg, 2-17
API structures
AD535_Config, 2-5 AD535_Id, 2-8
API summary table, 2-2 description, 2-2
API module support, 1-3 API module support for 6711 DSK, table, 1-4 API modules, 1-3 device identification symbol, note regarding, 1-5 how the BSL benefits you, 1-2 interdependencies, 1-3 introduction, 1-2 modules and include files, table, 1-3 overview, 1-1 project settings, 1-5
BSL API module, 4-1
API function, 4-3
BSL_init, 4-3
description, 4-2 function table, 4-2
D
device identification symbol, note regarding, 1-5 DIP API module, 5-1
API constant, 5-3
DIP_SUPPORT, 5-3
API function, DIP_get, 5-3 API summary table, 5-2 description, 5-2
B
BOARD API module, 3-1
API constant, 3-3
BOARD_SUPPORT, 3-3
API functions
BOARD_readReg, 3-3 BOARD_writeReg, 3-4
API summary table, 3-2 description, 3-2
board support library (BSL)
6711 DSK module support, 1-4
F
FLASH API module, 6-1
API constant, 6-3
FLASH_SUPPORT, 6-6
API functions
FLASH_checksum, 6-3 FLASH_erase, 6-4 FLASH_read, 6-5 FLASH_write, 6-6
description, 6-2
API summary table, 6-2
Index-1
Index
L
LED API module, 7-1
API constant, 7-3
LED_SUPPORT, 7-4
API functions
LED_off, 7-3 LED_on, 7-3 LED_toggle, 7-4
API summary table, 7-2 description, 7-2
Index-2
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