Do I need a pause?

[Dave]

Tazntex , Can I please see a listing of the modified code?

Dave Purola,
N8NTA

[tazntex]

Here is the revision Dave,
INCLUDE "MODEDEFS.BAS"
@ DEVICE PIC16F628a,XT_OSC
@ DEVICE pic16F628a, WDT_OFF
@ DEVICE pic16F628a, PWRT_ON
@ DEVICE pic16F628a, MCLR_OFF
@ DEVICE pic16F628a, BOD_ON
@ DEVICE pic16F628a, LVP_OFF
@ DEVICE pic16F628a, CPD_OFF
@ DEVICE pic16F628a, PROTECT_OFF
DEFINE OSC 4
mydata1 VAR byte
mydata2 var byte
address1 var byte
address2 var byte
checksum var byte
chk_sum var byte
master var portb.0
vacuum var portb.1
datagood VAR porta.2
serpin VAR porta.1 'serial input pin
PORTA = 0
PORTB = 0
trisa = %00000010
trisb = %10000000
CMCON=%00000111
PAUSE 50

loop:
mydata1=%00000000
gosub loop1
CheckSum = (address1 + address2)
CheckSum = CheckSum + (mydata1 + mydata2)
IF checksum != chk_sum THEN loop
IF mydata1 != mydata2 THEN loop
IF address1 != address2 THEN loop

IF (mydata1>0) && (checksum = chk_sum) THEN
datagood = 1 'mydata1 > 0 so I know whether or not mydata1 has returned to %00000000 if 1 then my led will come on
else
datagood = 0 'If mydata1 is %00000000 then var mydata1 is 0, my led is off
endif
if mydata1=%01010110 then loop2
if mydata1=%10101111 then loop2
if portb.0=1 then loop3
goto loop

loop2:
if mydata1=%10101111 then master=1 'master relay turn on
pause 50

if mydata1=%01010110 then master=0 'master relay turn off
pause 50
goto loop

loop3:
if mydata1=%01011001 then
vacuum=1 'portb.1 is on
else
vacuum=0 'portb.1 is off
endif
GOTO loop


loop1:
SERIN2 serpin,16780,[wait(254),address1,address2,mydata1,mydata2,chk_su m]
Return

[tazntex]

Not much has changed since my last posting, I haven't taken the hammer out of the toolbox just yet. The rf modules are capable of 5000bps so I did move up from 2400. I've been over under and through this forum, and saw a post where bruce had use a 100k to pull down the data, if I read this correctly, line coming in to reduce noise on the input. I have monitored my data on the serial input of the 628a, looks pretty clean. I haven't had any luck getting rid of the little gremlin who pops up every now then and holds the output pin high. Anyhow I am open to criticism, constructive preferred

[Archangel]

Hi Taz.
I see you have 2 ports as inputs, what is connected to them? PortB.7, I see no reference to in code, possibly my bad eyesight, but if open as input might allow "gremlins" to leak in.

[mackrackit]

address con %00000001
This equals 1

chk_sum = (address + address)
chk_sum = 2

if A = 0 && B = 0 then keydata = %10101111
keydata = 175

chk_sum = chk_sum + (keydata + keydata)
chk_sum = 2 + 175 + 175

chk_sum = 352

chk_sum var byte
byte = 0 to 255

Maybe try WORD sized variables.

Or maybe I am missing something

[tazntex]

Hello again Dave, you have a good point however I am using Bruce's idea for validating the in coming data. It is my understanding that the checksum will overflow which should not be a problem. I've been using it and that part doesn't seem to be the problem however I will experiment with it to see. I hope your right. Thanks Dave and 73

[mackrackit]

OVERFLOW...Yep I was missing something.
I will keep looking at it.

Do not get the hammer yet.