Hardware
5.2.4
S—Start Streaming
When
S
is issued, the ADS1x31REF begins printing raw output codes from the installed ADS device in
hexadecimal format, separated by new lines. The device iterates continuously until a character is received
from the serial port.
S
is used primarily by the EVM software for data collection.
5.2.5
D—Collect One Sample
Issuing the
D
command causes the ADS1x31REF to report the latest collected sample from the installed
ADS device. The sample is displayed in raw hexadecimal.
5.2.6
C—Set Channel
This command has no effect on the installed ADS device because there is only one channel.
•
C0—set to channel 0
•
C—(with no arguments) prints the current channel, always CHAN=0
5.2.7
Q—Query Parameters
Q
causes the ADS1x31REF to issue a coded string summarizing the current settings. The format of the
string is:
P0R[F,S]OIC0
followed by a carriage-return and linefeed.
6
Hardware
A block diagram of the ADS1x31REF is shown in
The schematic and layout drawings are given
in
LCD
SWITCHES
INPUT
FILTERING
GPIO
CH1
ADS1x31
SPI
MSP430F449
UART
+5V
LOAD CELL
CONNECTORS
POWER
SUPPL
Y
+3.3V
USB-SERIAL
INTERFACE
USB CONNECTOR
Figure 8. ADS1x31REF Hardware Block Diagram
20
ADS1131REF and ADS1231REF
Copyright
©
2010–2011, Texas Instruments Incorporated
SBAU175A
–
July 2010
–
Revised August 2011
TI [ TEXAS INSTRUMENTS ]
