Microchip Technology MPLAB ICE, Руководство пользователя

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2001 Microchip Technology Inc. DS51159B-page 137
Troubleshooting
Click the Ports tab of the Development Mode dialog. The various parallel port
characteristics that MPLAB understands are listed in the dialog and, in the
start-up state, the LPT settings will be blank. Click Query Port Info.
You will see a dialog that instructs you to disconnect any security dongles or
other shared parallel port devices from the system before continuing the test.
Take whatever appropriate precautions are necessary and click OK.
Any parallel ports known to the operating system will appear along with their
base address and type, as identified by MPLAB. There should be a
correlation between what MPLAB understands the port to be and what the
system BIOS understands the port to be, although the exact terminology may
be slightly different. For example, the BIOS may report that a port is bi-
directional, while MPLAB may further refine this to describe the port as PS/2.
If you believe that there are not enough ports reported by MPLAB ICE (this
might happen after you add a parallel interface card), it may be necessary to
add the hardware device to the system configuration. In Windows 95, this is
done from the system dialog. Select Settings, Control Panel from the Start
menu. Double-click the System icon. Click the Device Manager tab and
expand the port settings by clicking the plus sign next to the ports, if
necessary. If there aren’t as many ports here as are listed under the BIOS,
you may need to add ports to the system. Double-click the Add New
Hardware icon of the Control Panel (refer to your operating system’s
documentation).
In MPLAB, select Options>Development Mode. On the Tools tab, make sure
the MPLAB ICE is selected as the tool, along with a valid processor module.
Click the Ports tab. Click Query Port Info to cause the software to look through
the known parallel ports for an MPLAB ICE system. If it finds one and can
communicate adequately, the MPLAB Status bar will be updated to indicate
the tool (MPLAB ICE) and the installed processor module.
8.4.4 No MPLAB ICE Found
If the software reports that there is no MPLAB ICE present after you have
attempted to configure the MPLAB ICE and clicked Query Port Info on the
Ports tab of the Development Mode dialog, you should do the following.
1. Select Options>Development Mode and click the Ports tab. Select the
Force Compatibility Mode check-box. Click Query Port Info.
2. If MPLAB ICE is now identified, then you are now in compatible, or nib-
ble, mode. The MPLAB ICE should function adequately in this mode, but
system response to PC inquiries will be slowed by the communication
interface.
3. If the MPLAB ICE is still not found, there may be a discrepancy between
Note: We recommend that you use LPT1 as your parallel port for MPLAB
ICE. Under certain conditions (especially Windows NT and Win-
dows 2000) MPLAB might not recognize additional LPT ports such
as LPT2.