Analog Devices ee-72 Application Notes

Engineer-to-Engineer’s Note EE-72

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Technical Notes on using Analog Devices’ DSP components and development tools

GENERATING BOOT EPROMS FOR THE SHARC EZ-KIT LITE'S

ADSP-21061 WITH A MULTIPROCESSOR ID=001

Contributed by: Joe Tykowski , Peninsula Solutions

Edited by: JT, DSP Applications Group

OVERVIEW

The SHARC EZ-Kit-Lite is useful as a design, development, and demonstration platform for Digital
Signal Processing applications. As a demonstration tool, it is often preferable to generate a PROM for
the EZ-Kit rather than download an application over the serial port. This app note describes how to
generate a bootable PROM from a “C” source file. This app note uses the Talk-Through “C” example
program that comes with the EZ-Kit. The information presented here can be applied to any “C”
program. Programmers developing code for the SHARC EZ-LITE Lite should be aware that the ADSP­21061 has it's multiprocessor ID pins, ID

, set to 001. This is important when setting up the command

0-2

line switches for the boot loader, LDR21k.

Last Modified: 9/08/99

ARCHITECTURE FILE

The EZ-Kit Lite package requires the use of the EZKIT.ACH file for specifying how the internal
memory of the EZ-Kit is organized. The Lite compiler must use the file:

C:\EZ-KIT\21K\LIB\EZKIT.ACH

Note: the full “C” compiler version allows the user to specify which .ach file is used on the compiler
command line.

The EZKIT.ACH file that is included for demonstration purposes should be saved for future reference.
In order to make a bootable PROM, modify the file from this:

Table 1 - Original EZKIT.ACH file

!--------------------------------------------------------------------­.SYSTEM SHARC_EZKIT_Lite;
!
! This architecture file is required for used with the SHARC EZ-KIT
! Lite development software. It is structured for use with the C
! compiler but also can be used with assembly code.
!

a

! This architecture file allocates:
! Internal 133 words of 48-bit run-time header in memory block 0
! 16 words of 48-bit initialization code in memory block 0
! 619 words of 48-bit kernel code in memory block 0
! 7424 words of 48-bit C code space in memory block 0
! 4K words of 32-bit PM C data space in memory block 0
!
! 8K words of 32-bit C DM data space in memory block 1
! 4K words of 32-bit C heap space in memory block 1
! 3712 words of 32-bit C stack space in memory block 1
! 384 words of 32-bit kernel data in memory block 1

.PROCESSOR = ADSP21061;

! ------------------------------------------------------------­! Internal memory Block 0
! ------------------------------------------------------------­.SEGMENT/RAM/BEGIN=0x00020000 /END=0x00020084 /PM/WIDTH=48 seg_rth;
.SEGMENT/RAM/BEGIN=0x00020085 /END=0x00020094 /PM/WIDTH=48 seg_init;
.SEGMENT/RAM/BEGIN=0x00020095 /END=0x000202ff /PM/WIDTH=48 seg_knlc;
.SEGMENT/RAM/BEGIN=0x00020300 /END=0x00021fff /PM/WIDTH=48 seg_pmco;
.SEGMENT/RAM/BEGIN=0x00023000 /END=0x00023fff /PM/WIDTH=32 seg_pmda;

! ------------------------------------------------------------­! Internal memory Block 1
! ------------------------------------------------------------­.SEGMENT/RAM/BEGIN=0x00024000 /END=0x00025fff /DM/WIDTH=32 seg_dmda;
.SEGMENT/RAM/BEGIN=0x00026000 /END=0x00026fff /DM/WIDTH=32 /cheap seg_heap;
.SEGMENT/RAM/BEGIN=0x00027000 /END=0x00027e7f /DM/WIDTH=32 seg_stak;
.SEGMENT/RAM/BEGIN=0x00027e80 /END=0x00027fff /DM/WIDTH=32 seg_knld;

! ------------------------------------------------------------­! External Memory Select 1 is reserved for the UART.
! -------------------------------------------------------------

.ENDSYS;

To this:

Table 2 - "Promable" EZKIT.ACH file

!--------------------------------------------------------------------­.SYSTEM SHARC_EZKIT_Lite;
!
! This architecture file is required for used with the SHARC EZ-KIT
! Lite development software. It is structured for use with the C
! compiler but also can be used with assembly code.
!
! When compiling with g21k the "-nomem" switch should be used to
! disable unnecessary runtime initialization.
!
! This architecture file allocates:
! Internal 133 words of 48-bit run-time header in memory block 0
! 16 words of 48-bit initialization code in memory block 0
! 8043 words of 48-bit C code space in memory block 0
! 4K words of 32-bit PM C data space in memory block 0
!
! 8K words of 32-bit C DM data space in memory block 1
! 4K words of 32-bit C heap space in memory block 1
! 4K words of 32-bit C stack space in memory block 1

.PROCESSOR = ADSP21061;

EN-72 Page 2

Technical Notes on using Analog Devices’ DSP components and development tools

Phone: (800) ANALOG-D, FAX: [phone], FTP: ftp.analog.com, EMAIL: [e-mail]