Dave: You stated that "hardware migration should be as easy as rewiring the keyboard to use the new connector and adding the proper Peripheral ID resistor". Since you've "converted several hardware products", can you please verify that my connections are correct?
I was not able to access the links provided in a previous e-mail. But I'm guessing that they were links to 1) "Electrical Interface (16-pin) Connections for Palm Handhelds" which shows the connections between the Palm, Serial Cradle and PC DB9; and 2) "Electrical Interface Signals for Palm Handhelds" which was a table with headings: Pin #, Signal Name, and Function. http://www.palmos.com/dev/tech/hardware/palmhardware/electrical_interface(16 -pin)signals.pdf & http://www.palmos.com/dev/tech/hardware/palmhardware/electrical_interface(16 -pin)connections.pdf. I used this information to rewire as shown here. Obviously the 10 pin docking connector must change to a 16 pin version. > > I've remapped the signals from the 10 pin to the 16 pin as follows: > > PALM 10 PALM 16 > 1. DTR 15. DTR > 2. 3.3Vdc 9. Vout > 3. RD 10. RxD > 4. RTS 14. RTS > 5. TD 11. TxD > 6. CTS 13. CTS > 7. GP11 5. HS IRO > 8. GP12 No 16 pin connection > 9. Unused No 16 pin connection > 10. SG 7. SG > > I've also made the following hardwired connections on the 16 pin connector. > 100K Ohm, 1% resistor (for a RS-232 Peripheral) from pin 8 (ID) to SG. > Pin 12 (detect) to SG. > > The Palm asserts the correct handshaking signals to enable my device to > transmit data, but the data transmitted from my peripheral is still not > recognized by the Palm 500. Did I rewire correctly? My functional 10-pin interface keypad emulates Palm's Stowaway fold-up keyboard. Best Regards, Wayne -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Dave Lippincott Sent: Tuesday, July 22, 2003 1:31 PM To: Palm Developer Forum Subject: Re: Hardware 10 pin to 16 pin serial interface migration > I think you misunderstand Wayne's question. Read and understood the question as written, I just didn't have the background info you do. 'Keyboard' wasn't mentioned in the original post. Just 'hardware' and RS232. I've converted several hardware products to work with the new connector port without problems. Again, the ports, while physically different, contain the same key components. Hardware migration should be as easy as rewiring the keyboard to use the new connector and adding the proper Peripheral ID resistor. If the 'drivers' are written with hardware specific code, then maybe a simple terminal app to debug the hardware should be used first to test the connection. Then new drivers written to take advantage of the hardware. I'd do everything I could to make sure any new software is written to stay within the APIs to ease migration to OS5 and beyond. ----- Original Message ----- From: "Dave Mottorn" <[EMAIL PROTECTED]> To: "Palm Developer Forum" <[EMAIL PROTECTED]> Sent: Tuesday, July 22, 2003 1:22 PM Subject: RE: Hardware 10 pin to 16 pin serial interface migration > I think you misunderstand Wayne's question. Wayne is developing a custom > keypad and he has one for the 10-pin serial interface that works. He's > trying to develop a similar keypad for the 16-pin serial interface. The > serial manager really doesn't have anything to do with it. Wayne is > watching the signals on an oscilloscope and when he asserts request to send > on his end he can see the PDA assert clear to send. However when Wayne > sends data it seems to go into never-never-land. Wayne is watching for the > data in memo pad and it doesn't appear. What Wayne needs at this point is > someone who is very familiar with the 16-pin serial interface to tell him > what else he needs to do signal-wise. > > We're stumped at this point and need some help from Palm's logic designers. > > regards, > > Dave Mottorn > > -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
