PNI Sensor Corporation
DOC#1018122 r02
PNI CommBoard User Manual
Page 12
~
– DRDY Hold
This command causes an indefinite delay of processing subsequent characters
received from the host until a „Q‟ character is received or the conditions of DRDY
port pin are met. The syntax is:
~#
such that # is either “1” or “0”, where “1” indicates DRDY must be HIGH to release
the hold and “0” indicates DRDY must be LOW.
Characters received from the host will continue to be stored in a 100-character buffer.
The exceptions are the „Q‟ and „F‟ commands, as they are processed as soon as they
are received. Once the hold condition on the DRDY line is met the system will begin
processing characters in the receive buffer in the order received.
Example
:
Wn1~1Rsi<CR>
Writes 01, then waits for DRDY to go HIGH. When DRDY goes HIGH the
CommBoard then fetches (reads) a signed 16-bit value from the SPI port.
Y
or
y
– Hold Always
This command causes the indefinite delay of processing subsequent characters
received from the host until a „Q‟ character is received. Characters received from the
UART, other than „Q‟ or „F‟, will be stored in a 100 character buffer. Once a „Q‟ is
received the system will begin processing characters in the receive buffer in the order
received.
Example
:
YwN1,2RMQ
As soon as the “Y” character is received, the CommBoard will stop processing.
Once the “Q” character is received the CommBoard will write two bytes, 01 and
02, and then receive an unsigned 3-byte word.
Q
– Quit Hold
Note that only capital „Q‟ is recognized. Receipt of this character immediately
releases any hold command presently set. This includes the DRDY Hold or the Hold
Always commands. Characters in the receive buffer will begin processing. If the
desire is to not process the buffer, then the Flush Buffer command should be sent
immediately prior to sending, as “FQ”.
F
– Flush Buffer
This command flushes the receive buffer. If there is a Hold command presently set
and the buffer contains characters, this command purges the characters in the buffer.
Summary of Contents for CommBoard
Page 1: ...User Manual PNI CommBoard...
