Texas Instruments TLV320AIC3268EVM-U, User Manual

Page: 22 / 27

Writing Scripts
www.ti.com
9 Writing Scripts
A script is simply a text file that contains data to send to the serial control buses.
Each line in a script file is one command. No provision is made for extending lines beyond one line, except
for the > command. A line is terminated by a carriage return.
The first character of a line is the command. Commands are:
I— Set interface bus to use
r— Read from the serial control bus
w— Write to the serial control bus
>— Extend repeated write commands to lines below a w
#— Comment
b— Break
d— Delay
f— Wait for Flag
The first command, I , sets the interface to use for the commands to follow. This command must be
followed by one of the following parameters:
i2cstd— Standard mode I
2
C bus
i2cfast— Fast mode I
2
C bus
spi8— SPI bus with 8-bit register addressing
spi16— SPI bus with 16-bit register addressing
For example, if a fast mode I
2
C bus is to be used, the script begins with:
I i2cfast— A double-quoted string of characters following the b command can be added to provide
information to the user about each breakpoint. When the script is executed, the software's
command handler halts as soon as a breakpoint is detected and displays the string of characters
within the double quotes.
The Wait for Flag command, f , reads a specified register and verifies if the bitmap provided with the
command matches the data being read. If the data does not match, the command handler retries for up to
200 times. This feature is useful when switching buffers in parts that support the adaptive filtering mode.
The command f syntax follows:
f [i2c address] [register] [D7][D6][D5][D4][D3][D2][D1][D0]
where 'i2c address' and 'register' are in hexadecimal format
and 'D7' through 'D0' are in binary format with values of 0,
1 or X for don't care.8
Anything following a comment command # is ignored by the parser, provided that it is on the same line.
The delay command d allows the user to specify a time, in milliseconds, that the script pauses before
proceeding. Note: The delay time is entered in decimal format.
A series of byte values follows either a read or write command. Each byte value is expressed in
hexadecimal, and each byte must be separated by a space. Commands are interpreted and sent to the
TAS1020B by the program.
22 TLV320AIC3268EVM-U Evaluation Module SLAU564A – February 2014 – Revised February 2014
Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated