User manual

Troubleshooting
© 2006 Microchip Technology Inc. DS51464C-page 111
2. Make sure that a COM port is properly set up exclusively for use by the program-
mer. Check the resources to ensure they are operating properly and that there
are no conflicts with other devices. This commonly happens when you have
another device that is improperly configured. Consult your Windows manual or
other reference literature. You can try removing, reconfiguring or disabling the
conflicting device, but do so only if you are familiar with those procedures.
3. Some system errors are caused by driver and hardware incompatibility.
4. Try connecting the programmer to a different serial port. If your PC has a 25-pin
serial port, you will need a 25-to-9 serial port adapter.
5. Check that the device is plugged into the demo board/target application correctly;
e.g., all pins are plugged into the socket and the device is correctly oriented.
For more information, see Section B.5.2 “Advanced Serial Communications Help”.
B.5.1.3 USB COMMUNICATIONS
1. Make sure you used the MPLAB IDE supplied USB driver for MPLAB ICD 2.
2. Make sure USB is selected on the Programmer>Settings
Communications tab.
B.5.2 Advanced Serial Communications Help
Here are some areas that can cause problems:
• Modem Interaction
• Problems with a Serial Mouse
• Interrupt Conflicts
• Third Party Communications Drivers
• Manually Setting Up The Port
B.5.2.1 MODEM INTERACTION
The programmers cannot be on the same communications port or the same interrupt
as a modem. You can try disabling the modem in software, moving one or the other to
a different communications port or removing the modem.
B.5.2.2 PROBLEMS WITH A SERIAL MOUSE
If you have a serial mouse, make sure you are not accidentally specifying that
communications port as your programmer port.
B.5.2.3 INTERRUPT CONFLICTS
Make sure that your system has no interrupt conflicts. That is, make sure that only one
device is using each interrupt.
On Windows 98/ME, select Settings>Control Panel
from the Start menu. Select
System and click on the Device Manager tab. Expand the Ports selection and make
sure there are no conflict indicators.
On Windows NT/2000/XP, select Settings>Control Panel
from the Start menu. Select
System and double click on Ports. Click on a COM port from the list and then click
Settings. In the Settings dialog, click Advanced. Make sure there are no IRQ conflicts.
CAUTION
If the Windows OS picked a USB driver, MPLAB ICD 2 will not work and you will not
be able to install the proper driver.