Do i have to use max232??

[SuB-ZeRo]

When i am trying to send data pic to another pic do i have to use MAX232?
coz i am trying these codes and not working....

'''''''''''''''''''MASTER
include "modedefs.bas"
define CHAR_PACING 100
DEFINE LCD_DREG PORTD
DEFINE LCD_DBIT 4
DEFINE LCD_RSREG PORTD
DEFINE LCD_RSBIT 0
DEFINE LCD_EREG PORTD
DEFINE LCD_EBIT 1
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2
DEFINE LCD_COMMANDUS 2000
DEFINE LCD_DATAUS 50
adcon1=7
t1 var word
t1=0
basla:
t1=0
lcdout $fe,1
lcdout "counter"
loop:
if portb.0=0 then goto birinci
goto loop
birinci:
serout porte.0,5,[1,13]
serin porte.1,5,30,gel1,#t1
gel1:
lcdout $fe,1
lcdout "counter",
lcdout $fe,$c0
lcdout "count:",#t1
pause 2000
goto basla
end


''''''''''''''''SLAVE
include "modedefs.bas"
define CHAR_PACING 100
CMCON = 7
TRISA =%11111111
b0 var byte
b0=0
COUNTER var word
COUNTER = 0
b1 var byte
b1 =0
DEFINE LCD_DREG PORTB
DEFINE LCD_DBIT 4
DEFINE LCD_RSREG PORTB
DEFINE LCD_RSBIT 0
DEFINE LCD_EREG PORTB
DEFINE LCD_EBIT 3
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2
DEFINE LCD_COMMANDUS 2000
DEFINE LCD_DATAUS 50
sil:
COUNTER=0
lcdout $FE, 1
lcdout "COUNTER"
lcdout $fe,$c0
lcdout "COUNT:"#COUNTER
loop:
serin portb.1,5,10,kontrol,B0
if b0=1 then goto ok
goto kontrol
goto loop
kontrol:
button porta.4 ,0,255,255,b1,1,goster
goto loop
goster:
COUNTER = COUNTER + 1
lcdout $FE, 1
lcdout "COUNTER"
lcdout $fe,$c0
lcdout "COUNT:"#COUNTER
goto loop
ok:
pause 20
serout portb.2,5,[#COUNTER,13]
lcdout $FE, 1
lcdout "COUNTER"
lcdout $fe,$c0
lcdout "COUNT SEND"
pause 1000
GOTO sil
END


SLAVE = 16F628 have a button on porta.4
MASTER=16F877 have a button on portb.0

[Dwayne]

Hello Sub Zero,

SZ>>When i am trying to send data pic to another pic do i have to use MAX232?<<

No, you do not... your signal does not need to be inverted or anything like that.

Take a look at the following:

http://www.picbasic.co.uk/forum/showthread.php?t=579


Remember, take one step at a time... Can you verify your output with a scope? Can you verify data is being sent? Nothing like attempting to send data on a port that is not capable... like Porta.3 which is a input for some chips. <g>

Dwayne

[SuB-ZeRo]

I did all of them but not working.
1. Make sure your Pins that you are using are I/O pins.
2. Make sure your chip is running (MCLR not on Reset)
3. Make sure there is no noise between the two pins. You may need a Resistor to Ground for this.
4. Make sure you are using the simplest of the SerOut commands. No "Additives" yet!... Got to get the basics going first.
5. Use the same Baud Rates, and use a SLOW Baud rate.
6. Its best to use the same Clock speed at first, until communications has been established.

2.do u mean i will not connect a resistor to mclr?(on both pics?)
3.do u mean i must connect TX and RX to ground with a resistor like 1 K?

[NavMicroSystems]

Have a look at PBP Manual Sections 5.68 & 5.70

serin porte.1,5,30,gel1,#t1
gel1:

Doesn't make much sense

[SuB-ZeRo]

i change the commands like u re suggestion
like this
serout porte.0,5,[1,13]
serin porte.1,5,t1
but this time nothing works

[NavMicroSystems]

I'm sorry Sub,

I did not suggest to change it to what you have changed it to,

I suggested to have a look at the Manual !