12f675_fuse_about_to_blow!

[LEDave]

Hi mackrackit,

The serial data transfer is working a treat

Before we move on a couple of quick questions I'm a little confused on.

1/ 16780. This is the MODE for inverted 2400 baud right?

2/ The 'inverted' baud. Is that just keeping the transmit voltage level from pc - PIC at TTL levels 0 and +5v, instead of + or - 12v as used it RS232?

Right then what's next (I've got a spare brown wire here just itching to send something out of my PIC)

[LEDave]

Would this work to send '4' out on PORTC.3 when '3' comes in from the pc.

ANSEL   = %00000000    'Disable analog select so ports work as digital i/o.
CMCON0  = %00000111    'Disable analog comparators.
TRISA   = %00000000    'Set PORTA as OUTPUT.
PORTA   = %00000000    'Set PORTA pins all low.
TRISC   = %00000000    'Set PORTC as OUTPUT.
PORTC   = %00000000    'Set PORTC pins all low.

MYVAR  VAR BYTE 

DATA_OUT CON 4 
 
MAIN:
PAUSE 250
SERIN2 PORTC.5, 16780, [DEC MYVAR] '2400 INVERTED
IF MYVAR = 3 THEN HIGH PORTA.5
PAUSE 5000
LOW PORTA.5
PAUSE 250
SEROUT2 PORTC.3, 16780, [DEC DATA_OUT]
PAUSE 5000
GOTO MAIN

[mackrackit]

1/ 16780. This is the MODE for inverted 2400 baud right?

Correct

2/ The 'inverted' baud. Is that just keeping the transmit voltage level from pc - PIC at TTL levels 0 and +5v, instead of + or - 12v as used it RS232?

Nope, inverted means 1 is 0 and 0 is 1.
It is still 0 to +5.

What I can see of your code on my phone it looks like it should work.

[LEDave]

What I can see of your code on my phone it looks like it should work.

And you were right mackrackit

'3' came in from the pc and '4' arrived on the pc, brilliant!

Where to next? send some text?

Dave

[mackrackit]

You can send some text.

And.....

Now would be a good time to play with the SERIN2/SEROUT2 modifiers.
Data can be formatted several ways, HEX, BIN, DEC, ASC||, STRings...

Might be something sorta fun... Send a number to the PIC® say in DECimal format and have the PIC® return the number in other formats. Play with every combination you can think of. This should give you an understanding how different number systems work with this system.

Could even send a couple of numbers and have an operation done on them and the results sent back to the PC.

[LEDave]

I'm on it.

Could take a day or two (or three) though. One or two 'holes' to plug in LEDave's knowledge base, bear with me.

As an aside here, is it just me or is there something 'magical' 'mystical' even about all this? You've a little black 'spider' with 14 legs and three wires attached and numbers appearing on a monitor at the press of a button, I love it.

Must dash, work, work, work and a lot of reading to do.

Dave

[mackrackit]

As an aside here, is it just me or is there something 'magical' 'mystical' even about all this? You've a little black 'spider' with 14 legs and three wires attached and numbers appearing on a monitor at the press of a button, I love it.

Kind of like science fiction.