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Avocet Systems, Inc. : The Complete Solution for Embedded Systems
Development Tools
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BMD
Frequently Asked Questions (FAQs)
What
processors do you support with your BMDs?
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Motorola PowerPC: 801, 821, 823, 850, 860, 505, 509
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IBM PowerPC: 401GF, 403GA, 403GB, 403GC, 403GCX
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CPU32: 68330, 68331, 68332, 68333, 68336, 68340, 68376
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CPU32+: 68349, 68360
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COLDFIRE: 5202, 5204, 5206, 5206E, 5307
What do I need to program Flash devices?
Flash support was added after version 3.0.0 of SourceGate
was released. Therefore, flash programming will not work
with version 3.0.0 or earlier. Click here
to download the latest beta SourceGate which supports Flash
programming.
I
can't get my Flash programming to work.
Go to the Flash FAQ page for
specific information on Flash programming.
My BMD will not work. I can't get it to sign on or do anything.
Several
things could cause this. We will start with the most common
problems.
- BMDs
are not standalone boxes like an emulator. You MUST
be plugged into a target AND sufficient power applied.
- Regarding sufficient power. The original version of
the BMD was designed to only work with a 5V power source.
We modified the design of the BMD to add a Maxim charge
pump device that allows proper operation at either 3.3V
or5V. The 3.3V voltage is "pumped up" to 5V internal
to the BMD, so everything should work fine.
Some
things to keep in mind here. The BMD requires about
1A- 1.2A of current when powered on (for a very short
time) while the inductor circuit on this charge pump
stores up its energy. The current will then settle down
to around 250mA during normal operation. Some Motorola
evaluation boards (and other target boards) use an in-line
resistor on the Vcc line to prevent over current conditions.
Since the BMD draws its power from the debug port on
the target board, the drop across this resistor will
not allow the needed current to be supplied to the BMD.
There are two solutions to this problem.
- Use the 10-pin adapter to connect a 5V external
power source to the BMD. Keep in mind that a power
supply capable of supplying at least 1.2A is required
in both cases.
On
new units that are coming out in the future this problem
will be eliminated all together with an external Wall
Wart.
- Check the pin out on your debug port and verify connections
back to the processor. Also, see the FAQ on the specific
processor you are having problems.
- Typically,
a BMD is not a "Plug and play" box. To function on a
target board there are several steps that must be taken
to get the unit up and running. Aside from the connection
and power problems already mentioned, you must set up
the chip on your target board to function with a background
mode debugger. Specific registers must be set up to
allow access to memory and assure the unit is in proper
operating modes. Watch dog timers typically need to
be disabled and chip select registers need to be set.
Click below do display example setup command files (.cmd)
for specific BMDs
To
view these files simply click on the link. To download
the file click on the link then select "File"
from the top menu bar and "Save as".
Also see next question "What does 'Fatal Error from CFSC.
BMD not responding' mean?"
What does "Fatal Error from CFSC. BMD not responding"
mean?
The BMD is not responding to SourceGate. The following is
a list of what might cause this.
-
The BMD is simply a communications device which takes
advantage of debug capability designed into the target
system's processor. In order for the BMD to work,
it MUST be connected to a target system which has
a working processor installed.
-
The BMD draws its power from the target system. The
BMD draws approximately 250mA during normal operation,
but may temporarily draw as much as 1A when power
is first applied. Many target systems designers place
a current-limiting resistor in the Vdd path, which
can prevent the BMD from being able to draw enough
current to operate properly. In many cases, the easiest
solution is to bypass this resistor; however, if you
do not wish to do this, HMI includes an adapter with
the BMD which allows you to provide an external power
source.
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Check the connections between the host computer, the
RS-232 cable, and the BMD.
-
Make sure that you specify the correct COM port in
SourceGate's startup command. This is a common problem
as many computers do not have their COM ports labeled.
See "How do I change the SourceGate's communications
parameters?" for more information.
-
Try running at a different baud rate. It is rare,
but we have seen a few cases where the a computer
would not be able to communicate with the emulator
at a specific baud rate. The allowable rates are 9600,19200,38400,
57600, and 115200.
-
If you still can not establish communications with
the BMD, contact HMI Technical Support.
Can
I change the DER register with my BMD?
The DER register is specifically excluded from those registers
presented to the user. Changing it MAY interfere with SourceGate's
use of the register. In general, ALL debug type registers
are hidden form the user as some are at times used by HMI's
DLLs. This doesn't mean that all debug registers cannot
be changed but shouldn't be unless totally necessary.
The
BMD stops on lines of code where no breakpoints were set.
This problem was reported from a customer using the "Radio
Parts Co. RPXLite board. The problem was the "debug monitor"
already programmed into the FLASH of the board was enabling
the "Register lock" mechanism of the MPC860 (See page 11-11,
section 11.4.5 in the new MPC860 User's Manual).
You
must add code to your application to write 0x55CCAA33 to
the following registers:
TBSCRK, TBREFAK, TBREFBK, TBK, RTCSCK, RTCK, RTSECK, RTCALK,
PISCRK, PITCK, SCCRK, PLPRCRK, and RSRK.
This change corrected several instances where the BMD would
stop on lines of code where no breakpoints were set.
The
BMD won't hit breakpoints that are set in Source or assembly
code.
One possibility is where you are starting code execution
from. If you have a breakpoint set in your source or assembly
file, you MUST start program execution from a source or
assembly window. You cannot start from the command window
(using the "g" command) or from the emulator status window.
Why
do you call it a BMD when everyone else calls it a BDM?
The units are "Background Mode Debuggers", hence BMD. It
just isn't right to call them "Background Debug Mode" debuggers
?? (BDM or should be BDMD??), a bit redundant isn't it?
Where
can I find specific information about what your BMDs can actually
do?
Specific information about our BMD's capabilities can be
found on our BMD
Datasheets.
10
pin (Berg) connector diagram and information for CPU32 and
32+ BMD.
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The RED wire on the connecting cable is pin 1.
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All pins are 0.10" spaced
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If the target board has an 8 pin BMD connection,
then those pins connect to pins 3-10 on HMI's 10 pin
Berg connector.
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If 8 pin connection is used we cannot terminate bus
cycle.
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We recommend placing a pullup (4.7k works well) on on
your target for DSCLK, DS, RESET and BERR.
10
pin (Berg) connector diagram and information for PPC 5xx and
8xx.
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The RED wire on the connecting cable is pin 1
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All pins are 0.10" spaced
16
pin connector diagram and information for PPC 4xx.
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The RED wire on the connecting cable is pin 1
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All pins are 0.10" spaced
26
pin connector diagram and information for COLDFIRE BMD.
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The RED wire on the connecting cable is pin 1
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All pins are 0.10" spaced
6
pin connector diagram and information for 68HC12 BMD.
- The
RED wire on the connecting cable is pin 1
- All
pins are 0.10" spaced
External Clips:
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The Black clip connects to Ground for reduced noise
effects.
- The
Violet clip connects to the E-Clock(ECLK/PE4 pin of
the target's CPU) Note: You cannot turn off ECLOCK while
using the BMD. The ECLK/PE4 pin must be used as the
ECLK, and requires the NECLK bit(bit 4 of the PEAR register)
be set to '0', and that either the IVIS bit(bit 3 of
the MODE register) be set to '1', or the ESTR bit(bit
4 of the MODE register) be set to '0'. The HMI 68HC12
BMD will set the target CPU to the correct values at
reset. If it is not possible to run in this configuration,
the user can supply a separate clock of the same frequency.
- The
Orange clip should be attached to the target system's
MODA signal.
- The
Red clip should be attached to the target system's MODB
signal.
When
I try to start SG2 it gives me insufficient memory under WindowsNT...
- Download
the latest Beta Version of SG2. We have not been able
to duplicate this problem. However, in one case upgrading
to our latest beta corrected the problem. This could
mean one of two things; the disk or files were bad and
simply downloading new files fixed the problem, or something
got corrected by default on the beta software. Whichever,
it corrected the problem. These files can be downloaded
from our Software
Downloads page.
-
SG2 is a Win31 application as seen by WinNT. Be sure
NT is supplying sufficient memory allocation for Win31
applications.
Will
your BMDs work with 5v and 3.3v systems?
- The
original version of the BMD was designed to only work
with a 5V power source. We modified the design of the
BMD to add a Maxim charge pump device that allows proper
operation at either 3.3V or5V. The 3.3V voltage is "pumped
up" to 5V internal to the BMD, so everything should
work fine with either voltage.
-
Some things to keep in mind here. The BMD draws its
power from the target system if not external source
is introduced. The BMD requires about 1A- 1.2A of current
when powered on (for a very short time) while the inductor
circuit on this charge pump stores up its energy. The
current will then settle down to around 250mA during
normal operation. Some Motorola evaluation boards (and
other target boards) use an in-line resistor on the
Vcc line to prevent over current conditions. Since the
BMD draws its power from the debug port on the target
board, the drop across this resistor will not allow
the needed current to be supplied to the BMD. There
are two solutions to this problem.
-
Short out the resistor.
-
Use the 10-pin adapter to connect a 5V external
power source to the BMD. Keep in mind that a power
supply capable of supplying at least 1.2A is required
in both cases.
On new units that are coming out in the future this
problem will be eliminated all together with an external
Wall Wart.
Example
command files for processor set up.
Typically
a BMD is not a "Plug and play" box. To function on a target
board there are several steps that must be taken to get
the unit up and running. Aside from the connection and power
problems already mentioned, you must set up the chip on
your target board to function with a background mode debugger.
Specific registers must be set up to allow access to memory
and assure the unit is in proper operating modes. Watch
dog timers typically need to be disabled and chip select
registers need to be set. Click below do display example
setup command files (.cmd) for specific BMDs.
To
view these files simply click on the link. To download the
file click on the link then select "File" from the top menu
bar and "Save as".
How
do I install a USB-BMD on Windows XP/2000?
- Put SourceGate II CD into CD Drive. The installer should
start automatically. If not, go to your CD drive in Windows
Explorer and double-click on Setup to start installer.
- Go through installer, selection the 32-bit install, and
clicking on appropriate check marks for the processor you
are using. When SourceGate completes it's install it will
prompt you to restart. Click on Yes.
- After Windows XP has restarted, FIRST power up the BMD,
AND THEN connect the USB connector to an open USB port on
your PC.
- Windows will detect new hardware and start the "Found
New Hardware Wizard". Select "Install the Software automatically"
(the "Recommended" choice). Ignore the popup warning about
Windows Logo testing by clicking on "Continue Anyway". Finish
Hardware Wizard.
- Reboot, leaving BMD powered and connected to PC.
- Windows may again detect new hardware. If that is the
case, Repeat Step 4, then Step 5.
Some customers have reported issues during installation on XP/2000
which we have not been able to duplicate after extensive testing.
If you are having trouble running the USB-BMD after installation
please consider the following:
- Try uninstalling SourceGate and reinstalling according
to the steps above, but this time try installing into the
default directory given during installation (C:\hmi\sg40132).
- If SourceGate seems to stop during initialization of the
BMD, or if you receive a "there is no USB device connected..."
error, please make sure both the BMD and target are powered
up, and that the USB cable is connected to your PC as well
as to the BMD.
- With the USB-BMD connected to the PC, with the BMD and
target powered up do the following: a) Go
to the Hardware Device Manager in Windows by right clicking
on My Computer on your Desktop and selecting "Properties".
b) Then click the "Hardware" tab and click the
"Device Manager" button. c) In the main menu at
the top of the window, select View->Devices by Type.
d) Click on the plus sign next to "Universal Serial
Bus Controllers to display all the USB devices on your machine.
The HMI USB BMD should appear there, and there should NOT
be a yellow exclamation mark next to it. If it does not
appear there, double check that the BMD and target are powered
up and the BMD is properly connect to the PC. If there is
a yellow exclamation mark next to the HMI USB BMD, right
click on the HMI USB device and select "Update Driver"
and choose "Install
the Software automatically" (the "Recommended" choice).
Ignore the popup warning about Windows Logo testing by clicking
on "Continue Anyway". Reboot after completing
the installation.
- Try disconnecting any other USB devices (such as scanners,
PDA cradles, etc) from your machine and rebooting.
- Try connecting the USB cable to a different USB port on
your machine if one is available, preferrably into a known
good port. Please note that the USB-BMD drivers are installed
an a particular USB port, so anytime the USB-BMD is plugged
into a USB port to which you have not installed the drivers,
you will be prompted to do so.
- Confirm that USB support is enabled on your machine by
entering your computer's BIOS and (this varies according
to the BIOS vendor) setting the "USB Interface" field under
"Peripheral Configuration" or "Advanced Setup" or "PCI Control"
to enabled. Note that your BIOS may not offer any selection
even though USB is supported on your machine. This is true
of some current Dell machines for example.
- A customer reported being able to use the USB-BMD after
changing his USB setting in his BIOS from USB 2 to USB 1.
This step is a last resort as it may affect other USB devices
on your machine.
If SourceGate still does not start up correctly, please
submit a support ticket to http://support.avocetsystems.com
with the following information (in addition to the information
requested on that page such as serial number, model number,
etc):
- Attach a copy of the "Setupx.txt" file from
the SourceGate installation directory ("x" being the number
of attempted installations).
- Describe precisely what occured during each of the above
steps, what error messages were encountered, etc
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