QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
No response from serial touchscreen |
| Ref. No. |
QNX.000009324 |
| Category(ies) |
Video, Utilities, Input Devices |
| Issue |
We've installed an Elographics AccuTouch serial touchscreen, but when we try testing it with the 'Touch test' command, we get no response. What should we do?
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| Solution |
The serial controller that provides the interface between the touchscreen and the computer has gotten into a "bad" state. Following these simple steps will fix the problem. (These steps also apply if a similiar problem is experienced with an AccuTouch tablet.)
1)x09If running QNX2, enter:
x09stty baud=9600 bits=7 par=none stop=1 >$mdm
x09qtalk m=$mdm c=2
If running QNX4, enter:
x09stty baud=9600 bits=7 par=none stopb=1 </dev/ser1
x09qtalk -m /dev/ser1 -c 2
2)x09Press <Ctrl>-<A>, then press <Shift>-<R>. This step applies for both QNX2 and QNX4
The touchscreen should respond with a 0 followed by a happy face ( ) indicating that the screen is working.
3)x09To exit qtalk, press <Ctrl>-<B>, then press <Q>.
If a happy face does not appear when performing step 2, there may be a problem with the port settings, or there may be a problem with cables, connectors or power source. Once the problem has been identified and corrected, repeate the above procedure starting from the qtalk command in step 1.
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