User`s manual

RabbitFLEX User’s Manual www.rabbit.com 13
2.4.4 Verify the Ethernet Connection
Run the sample program ping.c to verify that everything is connected properly. The sample program
ping.c is in the \Samples\tcpip folder where you installed Dynamic C.
Press function key F9 to compile and run the program. Dynamic C will display a status message during
compilation and download. If Dynamic C reports no errors and the Stdio window then opens and reports
that ping responses were received from the remote host, as shown in the screenshot in Figure 2.5, you have
verified that the network connection is functioning.
Figure 2.5 Output from ping.c
2.5 Troubleshooting Tips
This section discusses troubleshooting tips to try when the above instructions did not result in the error-
free running of the pong and/or ping program. There are various conditions to double-check.
If you see the message “No Rabbit Processor Detected”
• Be sure the programming cable is attached securely and that it is not misaligned or backwards.
• If your PC is busy running concurrent tasks, try lowering both the Debug and Download baud rates. Or
exit the concurrent tasks.
• If you have something like Palm Desktop running, it may monopolize a serial port. Disable this pro-
gram, or others like it (that is, any program that uses the serial port and stays open in the background).
• Use the power supply that came in the Tool Kit. Make sure it is attached securely.
• If you need to use a USB to serial converter, use the one sold at:
www.rabbit.com/products/rs232_usb_cable/index.shtml
since it has been tested for compatibility. Others may work as well, but some may not.
• Do some basic debugging. For example, see if there is power at the core module and check the 3.45
regulator. Figure 2.6 shows the points to probe with a multimeter. They are located in the lower right-
hand side of the module and are labeled “A” through “F.” Table 2-6 describes the labeled test points
and the voltages you should expect to see.