PDA PIC control

wakaka · Joined: 11 Sep 2006 Posts: 27

Hi there, I'm just wandering that can a PDA (Palm) control a PIC to do simple things like....blinking LED or sensor or hypertermnal???

Is there any available example, training kit or link??

Like I send some commands from a PDA to a PIC, then the PIC will start to blink an LED or do other task.
Wat software should i use for the PDA or wat should be the circuitry?
Of course the code should be written is CCS.

plz help....thanx......

asmallri · Joined: 12 Aug 2004 Posts: 1634 Location: Perth, Australia

Palm PDAs have an IR port. You could add an IR interface to the PIC and use this as you communications channel.
_________________
Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!

wakaka · Joined: 11 Sep 2006 Posts: 27

THanx for the info, is there any example for that??

Any one else has other suggestions? I prefer hard-wired between the PDA(Palm) and the PIC.
thanx

asmallri · Joined: 12 Aug 2004 Posts: 1634 Location: Perth, Australia

If you search the web you will find stacks of examples for using the Palm asa remote control. You will also find plenty of examples for getting a PIC to respond to RC5 (IR Remote control) sequences. You're now half way there..
_________________
Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!

wakaka · Joined: 11 Sep 2006 Posts: 27

I just found one chip, MCP2140 from Microchip. Looks like it can be used for IR communication between PIC and PDA.
But for PDA side, how can i send data? using wat software from PDA?Or the PALM OS has something like the windows hyperterminal?( I haven owned a PDA b4)
Is there any example using MCP2140 with PIC, like blinking an LED or something?

If i wanna use hard wired serial port from PDA, wat software can i use to write data??Hyperterminal for PDA?
For PDA wired serial, the configuration and schematic is it the same as in PC? meaning interface it with a MAX232?

thanx

Douglas Kennedy · Joined: 07 Sep 2003 Posts: 755 Location: Florida

Yes palm PDA's have level shifters ( MAX232 equivalents). To learn it's better to start looking into things yourself. You could have discovered the presence of the level shifter. The PDA is probably using 2.5v to 3.3v so if you see more than that on its serial pins there is a level shifter being used. Your questions are more to do with PDA's than PIC so you will do better searching PDA boards. Palm is a good PDA to use. Palm is public documentation adverse. That means a used Palm is very cheap since most will junk them rather than
try to reverse engineer them. Stay away from Palm's Hotlink it's an exercise in paranoia