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5.4 Troubleshooting WaveVision
5.4.1 Problems
Problem 1: The “ADC121C021 Eval Board”
Control Panel appears briefly, but disappears after
powering on the WaveVision board. Try Solutions
A, B, and C. After trying these solutions, the
WaveVision system must be hard reset to
recover. Press SW1 on the WV4 board to reset
the system.
Problem 2: The following error occurs when I try
to acquire data samples. Try Solution D.
Problem 3: The following error occurs when I try
to read or write registers through the Control
Panel. Try Solution D.
Problem 4: One of the following errors occurs
when I try to read or write registers through the
Control Panel. “java.lang.Exception: A USB
…CMD_REG_RW … while sending bulk read.”
“An exception occurred. Control Panel…”
Try Solutions A, B, and C. After trying these
solutions, the WaveVision system must be hard
reset to recover. Press SW1 on the WV4 board to
reset the system.
Problem 5: The Eval Board is not recognized
correctly in the System Settings Window (
Figure
9
). Try Solutions D and E.
5.4.2 Solutions
Solution A
: Ensure power is supplied to the V
A
supply on the board. A
single
jumper must be
placed across either pins 1&2, pins 3&4, pins 7&8,
or pins 9&10 of JP5 to select the board’s power
source. If using the Shunt Reference, pins 1&2 of
JP7 must be shorted. The V
A
supply is measured
by probing VIA10.
Solution B
: Ensure the pull-up resistors are
powered (R8 and R9). In Computer mode, JP2
must be shorted by a jumper for the WaveVision
software to work properly.
Solution C
: Ensure the board is firmly connected
to the WV4 board via the WV4S connector (J1).
See
Figure 6
.
Solution D
: Ensure the I
2
C Slave address is set
correctly in WaveVision. If evaluating the
ADC121C021, the address must be set to 0x54.
If evaluating the ADC121C027, the address will
be 0x50 if no user modifications have been made
to the board and ADDR is floating. If ADDR is tied
to GND, the address must be set to 0x51. If
ADDR is tied to V
A
, the address must be set to
0x52.
Solution E
: Ensure the 3P3V supply is connected
to the 3.3V regulated supply from the WV4 board.
The 3P3V supply is measured by probing pin 1 of
JP5. Test this with a volt-meter. The EEPROM
(U4) must be powered with 3.3V for WaveVision
to work properly.