Code for Send/Receive TTL/Comport Sample?

[richard]

Are you using the mecanique serialtool ? At least its a known quantity

try changing the pc end baudrate ie try 4800 and 19200
and the baudcon 4,5 bits as 0 and 1

maybe flash a led at 1 second intervals to check if osc is 20 mhz

[wdmagic]

yes im using MCS Serial tool,

4,5 = 0,1 and running @ 4800 results = ãã7üããã7üããã7üããã
same running at 19200 results = w~wüwüwüwüwüwüwüwüwüwüwü

not sure whats going on

[wdmagic]

ive been hooking it directly to PIC as I dont have a MAX232 chip or anything else available right now, I was told by the seller that I should be able to hook this cable directly to PIC but they had no help files, schematics, code etc.. available.

I have modified code for transmit to PC only, after I see something come in then I can work on the receive side. Here is my complete code right now, and I am using the microcode studio serial tool for connections.

'*  Notes   :                                                   *
'*          :                                                   *
'****************************************************************
Define OSC 20  
define HSER_BAUD 9600
DEFINE HSER_BITS 8
DEFINE HSER_CLROERR 1
RCSTA = $90
TXSTA = $24
TRISC = %11000000
TRISD = 0
BAUDCON.4 = 0
BAUDCON.5 = 1
RCSTA.7 = 1

start:  
Hserout ["Hello World", 13, 10] ' Send text followed by carriage return and linefeed 
pause 1000
goto start
End

[richard]

Maybe sspcon1.5=0 just incase

[richard]

I meant trying baudcon 4 and 5 =0 and then 4 and 5 as 1

[richard]

I assume serial tool is set to 8 bits no parity and 1 stop bit

[wdmagic]

ive tried both as 0 and both as 1

[richard]

What are your config settings i think the osc is not what yoyu think

you need a config fosc=hs in there


with the internal osc
for 4mhz you need a oscon=$60
or $70 for 8 mhz

[wdmagic]

Im useing a external OSC 20mhz using EC PIO mode so RA6 is IO, this is a TTL OSC

[Charlie]

I think you have a few errors in your configuration too.
Try:
define HSER_RCSTA 90h
define HSER_TXSTA 20h
define HSER_BAUD 9600
define HSER_CLROERR 1

Do not put this after the defines:
RCSTA = $90
TXSTA = $24
By doing so, you are effectively messing up what the defines did, and in one case ($24) you are introducing an error (should be $20)

[richard]

Ok well flash a led to prove osc is what you think

[wdmagic]

led is on 99% of the time, flashing ~2 times a sec, my baud rate is at 9600 right now

[richard]

Are you using pbp3 ?
What about config cpudiv = osc1_pll2