Newbe Question
Dave Stampf
Posts: 2
Hi,
I just unpacked my new Javelin Demo Board. I installed the Javelin, connected it to my computer using the suppied serial cable and a usb/serial converter from dynex. I installed the IDE that was on the disk, fired it up, entered the Hello World program and... Phhht.
I see intermittent errors.
Project/Indentify picks up 2 serial ports, 3 and 4. Sometimes 4 shows up with no device type and version $0F and sometimes it shows up with Javelin $50. The Device manager shows the serial line at 9600 baud, no parity, 1 stop, no flow control. It seems I have about a 1 in 10 chance of getting a javelin response.
Any thoughts?
Thanks in advance.
Dave
I just unpacked my new Javelin Demo Board. I installed the Javelin, connected it to my computer using the suppied serial cable and a usb/serial converter from dynex. I installed the IDE that was on the disk, fired it up, entered the Hello World program and... Phhht.
I see intermittent errors.
Project/Indentify picks up 2 serial ports, 3 and 4. Sometimes 4 shows up with no device type and version $0F and sometimes it shows up with Javelin $50. The Device manager shows the serial line at 9600 baud, no parity, 1 stop, no flow control. It seems I have about a 1 in 10 chance of getting a javelin response.
Any thoughts?
Thanks in advance.
Dave
Comments
In your device manager check the settings for your usb com port.
Set any latency timer setting to minimal.
If that does not resolve the error, try disabling the fifo buffer.
It could be your usb2ser cable does not fully support the signals
required by·the javelin. The javelin uses tx, rx and dtr.
The identify command must also specify echo and loopback.
regards peter
I suspect that it might be the usb/serial cable, though it does work in other applications. I used an older pc with a built in serial port and the Javelin worked fine.
On the original, I pushed all of the settings down to their lowest and turned off the fifo without any change in the problem. To answer one of your questions, the echo/loopback columns on the Indentify dialog box both are "Yes" when the Javelin is detected. Loopback always seems to return a "Yes", but when the Javelin is not detected it displays "No".
Final question on this - the documents said that the www.javelin.com has a list of approved adapters, but I was unable to locate the information. Is there such a list? Or does anyone have any suggestions?
Thanks again.
Dave
regards peter