Texas Instruments TLV320DAC3203 Evaluation Module TLV320DAC3203EVM-K TLV320DAC3203EVM-K Data Sheet
Product codes
TLV320DAC3203EVM-K
Appendix G Writing Scripts
G.1
Writing Scripts
A script is a text file containing data sent 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.
for the > command. A line is terminated by a carriage return.
The first character of a line is the command. Commands are:
I
Set the interface bus
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 for the commands to follow. This command must be followed by
one of the following parameters:
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 used, the script begins with:
I i2cfast
A double-quoted string of characters following the b command provides information 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 double quotes.
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 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 up to
200 times. This feature is useful when switching buffers in parts that support the adaptive filtering mode.
The command f syntax follows:
command matches the data being read. If the data does not match, the command handler retries 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.
Anything following a comment command # is ignored by the parser, provided that it is on the same line.
The delay command, d, allows specification of a time in milliseconds, that the script pauses before
proceeding. The delay time is entered in decimal format.
proceeding. 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.
hexadecimal, and each byte must be separated by a space. Commands are interpreted and sent to the
TAS1020B by the program.
The first byte following an r (read) or w (write) command is the I
2
C slave address of the device (if I
2
C is
used) or the first data byte written (if SPI is used, note that SPI interfaces are not standardized on
protocols, so the meaning of this byte varies with the device being addressed on the SPI bus). The
second byte is the starting register address where data is written (again, with I
protocols, so the meaning of this byte varies with the device being addressed on the SPI bus). The
second byte is the starting register address where data is written (again, with I
2
C; SPI varies). Following
these two bytes are data, if writing; if reading, the third byte value is the number of bytes read, (expressed
in hexadecimal).
in hexadecimal).
34
Writing Scripts
SLAU441 – April 2012
Copyright © 2012, Texas Instruments Incorporated