Hi Ben & Dave,
I have serial communicatin problem with Handspring visor. I was
advanced with the following steps:
1) I have take ROM images of Handspring Visor & M125.
2) And also I have one third part application namely as "PortMon"-
Portmon is a GUI/device driver combination that monitors and displays all
serial and parallel port activity on a system. It has advanced filtering and
search capabilities that make it a powerful tool for exploring the way NT
works, seeing how applications use ports, or tracking down problems in
system or application configurations.
3) I have devloped software simulator application (Which uses Null
modem serial communication). Which is continuously probe serial
communication port for incoming data. Once it received 6-byte frame data
like 1, 2, 3, 4, 5 & 6. It immediately re transmits 7, 8, 9, 10, 11 & 12
values to the serial port.
4) I have developed a small application using CW 7 (Windows) to test
my simulator application.
5) I have used M125 ROM Image in my Palm OS Emulator. And invoked
PortMon to monitor the port settings and for across data communication. And
I have placed my small application in Emulator, which was connected to COM1
with a baudrate of 19,200. And started my simulator application,which was
connected to COM2 and continuously probing to see the incoming data to COM2.
Here COM1 & COM2 are connected by using NULL modem technic. I have
transmitted frame (1, 2, 3, 4, 5 & 6) from my application (i.e., to COM1
port) to the Simulator (which continuously probing at COM2 port) once it
received the above frame then it retransmits back another frame (7, 8, 9,
10, 11 & 12) to the application. Once application received the second frame.
It immediately displays as an alert in the application. All the above
process, I have observed very clearly like port settings, data transmission
etc.., in PortMon application.
6) I have repeated 5th step with Handspring Visor ROM Image. Here I
did not observe the port settings as well as data transfer, even I have
added the following piece of code before srmOpen of the port.
if (!FtrGet ('hsEx', 0, &ftrHSVersion))
HsExtKeyboardEnable (false);
Please help me on this issue. Thanks in advance and anticipating a
good solution to my problem.
Thanks & Regards,
Rangababu TNV.
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