ORTEC DSPEC Pro, Руководство пользователя по оборудованию

Страница: 65 / 108

794380D / 0914 4. FIRMWARE COMMANDS AND RESPONSES
55
unsigned checksum of all characters on the record up to but not including the checksum charac-
ters, and <CR> represents the ASCII carriage return character.
$Axxxccc<CR> xxx is a single 8-bit unsigned number.
$Cxxxxxccc<CR> xxxxx is a single 16-bit unsigned number.
$Dxxxxxyyyyyccc<CR> xxxxx and yyyyy are 16-bit unsigned numbers.
$Exxxxxccc<CR> xxxxx is a single 16-bit alarm mask.
$Fssss...<CR> ssss... is a variable length ASCII character sequence (no
checksum is sent with this record).
$Gxxxxxxxxxxccc<CR> xxxxxxxxxx is a single 32-bit unsigned number.
$IT<CR> True response to a SHOW command (no checksum).
$IF<CR> False response to a SHOW command (no checksum).
$Jxxxxxyyyyy...ccc<CR> Response to SHOW_CONFIGURATION command.
$Mxxxxxxxxxx...ccc<CR> Response to SHOW_STATUS command.
$Nxxxyyyzzzccc<CR> xxx, yyy, and zzz are 8-bit unsigned numbers.
4.2.2. MCB Commands
This section lists each command with a description of its operation. The descriptions include a
list of any error codes that may result. As described in the two preceding sections, the usual
response is a macro error code of 0 and a micro error code of 0 (no errors). Though syntax and
communication error responses may result from any command, in practice, these error responses
rarely occur on systems with reliable communication hardware running debugged software.
The commands are listed in alphabetical order, each starting with a command prototype line.
Uppercase letters, numeric digits, blank space, and special symbols such as the underscore “_”
and comma 13 “,” in the prototype line are literal text to be sent to the MCB exactly as they
appear. Lowercase letters in the prototype line represent numeric values as described in the
accompanying text; they should not be sent literally to the MCB but should be replaced by an
appropriate numeric value. In this section the term <CR> represents the ASCII carriage return
character, decimal value 13; and the character “_” represents the ASCII underscore character,
decimal value 95.
CLEAR
The channels of spectral data in the window of interest (see SET_WINDOW command) are
set to zero. The live time and true time counters are also set to zero. This command is equi-
valent to the combination of CLEAR_COUNTER and CLEAR_DATA commands.