CAEN
Electronic Instrumentation
UM6508
–
DT5495 User Manual rev. 0
23
7.4
Power-on Configuration Sequence
When the board is powered on, the on-board programmable devices are configured with the firmware images stored
in their dedicated flash memories. If all programmable devices (MFPGA, UFPGA and GDG) are correctly configured, the
CFG LED is lit on. In case an anomaly occurs, the CFG LED status can be:
1)
BLINKING: the FPGAs are configured, but the Main FPGA remained in Factory mode.
The MFPGA can be configured by two kind of firmware images which are stored on the dedicated flash memory: the
Factory firmware and the Application firmware. The Factory firmware is a basic firmware specifically intended for boot
and recovery functions. The Application firmware is the standard operating firmware and can be upgraded by the user
through the Ethernet or the USB interface.
At power-on, the MFPGA configures itself with the Factory firmware image and subsequently attempts to load the
Application firmware. If the application firmware is missing or corrupted, the MFPGA will remain in the factory mode.
The Factory firmware guarantees the communication with the board and allows the MFPGA Application firmware
upgrade.
2)
OFF: one or more FPGAs may not have been configured.
In case of a MFPGA configuration issue, an attempt to force the MFPGA in Factory mode can be performed by the
Restore button (see next paragraph). If the CFG LED starts blinking, an application firmware upgrade can be attempted.
Restore Function
The Restore button on the DT5495 rear panel (see
Fig. 4.1
) allows to:
•
Reset the board to the default IP address: 192.168.0.90. The IP can anytime be changed by the Web Interface
(see Sect.
Web Interface
)
•
Force the board in the Factory firmware of the Main FPGA.
Use the button in two alternative modes:
1.
Hold the button down (with a pen tip, for example).
2a. Power cycle the DT5495, then wait for less than 5 seconds; this mode only forces the boot from the
factory Main FPGA firmware, while the ethernet IP address of the board is not affected.
2b. Power cycle the DT5495, then wait for at least 15 seconds; this way, both the IP address is restored to the
default value and the board is forced to boot from the factory Main FPGA firmware.
3.
Release the button.
4.
Power cycle the DT5495 again.
In factory mode, the CFG LED starts blinking (see the CFG description in Chap.
4
). Use the Web Interface with ethernet
connection to 192.168.0.90 for check in case of IP address change (Sect.
Web Interface
).
