Serin Serout Help

[MangoKid]

Should I be using pull up resistors (22k, 4.7K, 2.2k)?

[mackrackit]

You will need to turn the analog off.
The two links below should help. For now, after you read the one from Melanie, use the one from Darrel.
http://www.picbasic.co.uk/forum/showthread.php?t=561
http://www.picbasic.co.uk/forum/cont...54-All-Digital

And if you could post all of your code and how the configs are set might also be helpful.

[MangoKid]

Thanks again i will check the links and do what I can. as far as the code goes all of the code i have is written above.

[mackrackit]

Lets back up a bit. We normally start with a blinky program. If you have already done this then great, if not....

The configs will need set for the hardware. This can be done int the *.inc file found in the PBP directory or in code space. This link tell about it.
http://www.picbasic.co.uk/forum/showthread.php?t=543
Being that you are starting, start using MPASM for the assembler. It will save you trouble later.

Start with the 16F877A.
By default the OSC in the *.inc is set for XT. This is fine if you have a crystal attached, if you have a resonator change it to HS.
Now for the code,

'16F877A
DEFINE OSC 4 ' This tells PBP how fast the chip is running.

'This line is the configs MPASAM style
'Comment it out if the configs are set in the *.inc
@ __config _HS_OSC & _WDT_OFF & _LVP_OFF & _CP_OFF &_BODEN_OFF

ADCON1=%00000111 ' Turns off the ADC
CMCON=%00000111  'Turns off the Comparators
TRISA = %00000000  ' Makes all pins on PORTA outputs

'Set up some variables.
LED  VAR PORTA.1  'Attach a LED to PORTA pin 1

RUN:  Make the LED blink at 1 sec on and 1 sec off
HIGH LED
PAUSE 1000
LOW LED
PAUSE 1000
GOTO RUN
END

The above will help you determine if the chip is running correctly.

Do the same for the 12F683.
The PBP default is internal OSC and the chip defaults to 4 MHz. So you should be good as long as PBP is told about it.
DEFINE OSC 4
In you code like we did for the 877A.

Get everything blinking as it should and then tackle the serial part.

[Darrel Taylor]

Your flowpin is on GPIO.3.

SERIN2 GPIO.1\GPIO.3, 3313, [DEC X]

Put the serial data on GPIO.3, and the flowpin on GPIO.1.
flowpin needs to be able to output.

And set GPIO.0 to OUTPUT for the LED.

OUTPUT GPIO.0

Don't forget to disable MCLR in the configuration.

[MangoKid]

I have been working on the code for a couple of days. I have made a small progression if i manually send a "1" to the SERIN it will assume a flash rate of 1. this is done by placing the datapin wire to ground. Hear is the current code i am working with. Any help would be great, Thanks!

Recive:
Clear 
define ocs 4
INCLUDE "modedefs.bas"
@_config_HS_osc &_WDT_OFF &_LVP_OFF &_CP_OFF &_BODEN_OFF
ADCON1 = %00000111
CMCON = %00000111
TRISA = %11111111
TRISD = %00000000
X VAR BYTE
SERIN2 PORTA.5\PORTA.1, 3313, [DEC X]
LOOP1:     
   HIGH PORTD.2
   PAUSE X
   LOW PORTD.2
   PAUSE X
GOTO LOOP1
END  

Send:
Clear 
define ocs 4
INCLUDE "modedefs.bas"
@_config_HS_osc &_WDT_OFF &_LVP_OFF &_CP_OFF &_BODEN_OFF
ADCON1 = %00000111
CMCON = %00000111
TRISA = %00000000
TRISD = %00000000
PORTA = %00000000
LED VAR PORTA.1
X VAR BYTE
X = 100
LOOP1: 
   SEROUT2 PORTA.5/PORTA.1, 3313, [100]
   PAUSE 5000
GOTO LOOP1
END

Thanks again!

[Archangel]

Hi MangoKid,
I am away from MY Computer and my books, but if I understand this last statement correctly,
" this is done by placing the datapin wire to ground."
I believe you are referring to the ports "Idle State" if so here is the little secret: If you are sending TRUE the port wants a pull up resistor and if you are sending INVERTED the port wants a pull Down resistor.