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FAA20 Embedded NEXCOM Vocoder

Board Manual

This manual has been prepared for the Federal Aviation Administration.

FA100-00107 (March 2004) – Rev 1.0.0 Page 78

8.3.13 DM

The DM command is used to access processor data memory. A single

memory location can be read/written or a block of memory can be printed.

Table 24: DM Command Syntax

ATTRIBUTE DESCRIPTION

SYNTAX DM addr [hexdata]

DM startaddr [ .. endaddr | + length ]

addr Data Memory Address (hexadecimal). Data memory

addresses are 16-bit.

startaddr Starting Address for a block print (hexadecimal).

endaddr Ending Address for a block print (hexadecimal).

length Length of block to print (hexadecimal).

PARAMETERS

hexdata Hexadecimal data value (16-bit).

FLASH NO

Read from location 0x0000.

COM1: dm 0

> DM 0000 = 041B

Write to location 0x0000 (example disables codec, PCM and nibble

interrupts).

COM1: dm 0 8

> DM 0000 = 0008

Print memory block from address 0x1406 to 0x140E

COM1: dm 1406 .. 140e

> DM 1406 = BEEF BEEF BEEF BEEF BEEF BEEF BEEF BEEF

> DM 140E = BEEF

EXAMPLES

Print memory block starting at address 0x0A00 with a length of 0x10

COM1: dm a00 + 10

> DM 0A00 = 0010 0004 5DA7 0A18 0000 0000 0A14 054F

> DM 0A08 = 0002 83C5 0001 06CD 0000 054F 0000 0000

Note: Do not enter any leading ‘0x’ characters.

Note: Insure you add spaces to separate ‘+’ and ‘..’ character strings.

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Digital Voice Systems VC-20-ATC-10B Especificaciones Pagina 84