Please help with EDE702 - Serial to LCD interface

[Tomexx]

mackrackit,
I didn't draw a schematic, just used/modified the one from the EDE702 datasheet. I'm attaching both the datasheet and a simplified schematic.
Note the schematic shows line coming from the PS's serial port but in my case the line is coming from the PIC.
Joe,
I read the whole topic and while the code works, it is too complex for me. Plus I'd have to have MPASM and compile using that... Not sure how to go about that.
Post #25 looks promissing and I can actually understand it!
I'll try that one first and if it's loosing characters then I'll try to use yours.

Thanks,
Tom

[skimask]

In your original program, change BAUD CON 2 to BAUD CON 6 and see what happens...
Key phrase here is:

Note the schematic shows line coming from the PS's serial port but in my case the line is coming from the PIC.

The PBP manual will tell you why this matters...

[mackrackit]

If you are using the schematic posted... you did ground the OSC? The schematic is missing that.

MPASM is simple. Just install MPLAB from microchip (it is on your PBP CD) and tell MCS to use MPASAM.

The only thing you may need to do is change your configs for MPASM. Not a big deal.
http://www.picbasic.co.uk/forum/showthread.php?t=543

[aratti]

Your problem is the internal oscillator. As already suggested in post#4, use a 4 MHz xtal or a resonator also for the pic, and you will see that the serial communication will work.

Al.

[skimask]

Your problem is the internal oscillator. As already suggested in post#4, use a 4 MHz xtal or a resonator also for the pic, and you will see that the serial communication will work.
Al.

Might not be the internal osc though...
As has been pointed out somewhere (don't remember where) before, those internal oscillators aren't as loose as they used to be...unless of course it's an older chip in the first place.

[Darrel Taylor]

The schematic for the EDE702 uses a ceramic resonator, but your code comment suggests you are using a crystal.

Did you add two 22-27pF capacitors on the crystal?
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[Tomexx]

Hi,
1. Tried BAUD CON 6 (instead of 2)..... no go
2. The crystal on the EDE702 has two 22pF caps going to ground
3. Haven't tried a crystal for the Pic (sender) but it's a '628A

Will make the correct schematic and post it (right now I don't have access to a drawing program that will do schematics). Maybe I'll get access to Orcad tomorrow.

I start to get a feeling that the EDE702 is just dead

Till then thanks for your suggestions,
Tom

[skimask]

3. Haven't tried a crystal for the Pic (sender) but it's a '628A

That's what I said to try in post 4.