GRMON3-UM
June 2019, Version 3.1.0
11
www.cobham.com/gaisler
3.2.2. Debug driver options
The debug drivers provide an interface to view and access AMBA devices during debugging and they offer device
specific ways to configure the hardware when connecting and before running the executable. Drivers usually au-
to-probe their devices for optimal configuration values, however sometimes it is useful to override the auto-probed
values. Some options affects multiple drivers. The debug driver options are described in Chapter 6, Debug drivers.
3.2.3. General options
The general options are mostly target independent options configuring the behavior of GRMON. Some of them
affects how the target system is accessed both during connection and during the whole debugging session. All
general options are described below.
grmon [options]
Options:
-abaud
baudrate
Set baud-rate for all UARTs in the system, (except the debug-link UART). By default, 38400 baud is used.
-ambamb
[maxbuses]
Enable auto-detection of AHBCTRL_MB system and (optionally) specifies the maximum number of buses
in the system if an argument is given. The optional argument to -ambamb is decoded as below:
0, 1: No Multi-bus (MB) (max one bus)
2..3: Limit MB support to 2 or 3 AMBA PnP buses
4 or no argument: Selects Full MB support
-c
filename
Run the commands in the batch file at start-up.
-cfg
filename
Load fixed PnP configuration from a xml-file.
-echo
Echo all the commands in the batch file at start-up. Has no effect unless
-c
is also set.
-edac
Enable EDAC operation in memory controllers that support it.
-freq
sysclk
Overrides the detected system frequency. The frequency is specified in MHz.
-gdb
[port]
Listen for GDB connection directly at start-up. Optionally specify the port number for GDB communica-
tions. Default port number is 2222.
-gui
Start the GRMON graphical user interface. This option must be combined with an option which specifies
the debug-link to use. See Chapter 4, Graphical user interface for more information.
-ioarea
address
Specify the location of the I/O area. (Default is 0xfff00000).
-log
filename
Log session to the specified file. If the file already exists the new session is appended. This should be used
when requesting support.
-ni
Read plug n' play and detect all system device, but don't do any target initialization. See Section 3.4.11,
“Attaching to a target system without initialization” for more information.
-nopnp
Disable the plug n' play scanning. GRMON won't detect any hardware and any hardware dependent func-
tionality won't work.
-u
[device]
Put UART 1 in FIFO debug mode if hardware supports it, else put it in loop-back mode. Debug mode will
enable both reading and writing to the UART from the monitor console. Loop-back mode will only enable
reading. See Section 3.9, “Forwarding application console I/O”. The optional device parameter is used to
select a specific UART to be put in debug mode. The device parameter is an index starting with 0 for the
first UART and then increasing with one in the order they are found in the bus scan. If the device parameter
is not used the first UART is selected.
