no loopback
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Posts: 46,084
Hello all,
As for the next chapter in my request for help, I'd like to know
what it means for loopback to return false. I have tried myriad ways
to get this loopback to return true, but nothing I tried with the
stamp would do this. Finally, I removed the stamp from the equation
and just hooked up all inputs to outputs in hopes of getting a
positive loopback signal. That is: 1,6,4 connected, 2,3 connected,
7,8 connected, leaving 5 and 9 hanging. This still didn't get me a
loopback, so I am wondering what it means to have a loopback, and if
the problem is with my wiring. Thanks again.
Stefan
As for the next chapter in my request for help, I'd like to know
what it means for loopback to return false. I have tried myriad ways
to get this loopback to return true, but nothing I tried with the
stamp would do this. Finally, I removed the stamp from the equation
and just hooked up all inputs to outputs in hopes of getting a
positive loopback signal. That is: 1,6,4 connected, 2,3 connected,
7,8 connected, leaving 5 and 9 hanging. This still didn't get me a
loopback, so I am wondering what it means to have a loopback, and if
the problem is with my wiring. Thanks again.
Stefan
Comments
loopback detected. From old Parallax document cables.txt:
"BASIC Stamp II (PC serial port DB9 connector):
Serial Stamp Pin Stamp Name Notes
2 1 TX Serial out from Stamp II
3 2 RX Serial in to Stamp II
4 3 ATN Serial attention line
5 4 GND Serial ground
Stamp II note: for the Stamp II software to find the Stamp II on any serial
port, you must connect DSR (DB9 pin 6) to RTS (DB9 pin 7) on your PC's serial
port..."
Other things to consider-
Does any serial device work off the serial port your cable is
connected to? If not, you may have a system problem (BIOS error,
port power not enabled, etc.).
Is your desired com port enabled in the Stamp editor (Edit /
Preferences / Editor Operation / Stamp Mode and Ports)?
Will your cable work on some other PC?
Regards,
Steve