140 Register-Based Programming Appendix B

Programming Examples

The following C language example programs were developed on an
embedded computer using Agilent VISA I/O calls.You can also use a
PC connected via GPIB to an E1406A slot 0 Command Module. The
command module provides direct access to the VXI backplane.
NOTE If you use the E1406A with SCPI commands, use the E1563A/E1564A
SCPI driver which you installed in the E1406A firmware and register
programming is not necessary. Chapter 3 describes the SCPI commands
for the digitizers driver.
This program shows one way to register program a digitizer and includes:
•Read the ID and Device Type Registers
•Read the Status Register
•Make digitizer measurements
•Retrieve the last readings from each channel’s CVT register
•Retrieve all the readings from the two cache registers
•Reset the module
A typical printout from the program is:
ID register = 0xCFFF
Device Type register = 0x7267
Status register = 0x40CE
last readings printout
all readings from all channels printout
E1563A/E1564A is reset