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I2C QUESTION2

 
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WHUNG.JOHN
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I2C QUESTION2
PostPosted: Sat Sep 09, 2006 12:14 pm     Reply with quote

HI!I am a student!
i am writted my homework about i2c use!
but i test my written code,always find a question,
please everbody can teach my ,question exp:
*************************************************************
slave here:

#include <16F77.h>
#use delay(clock=4000000)
#fuses XT,WDT
#include "lcd.c"
#use i2c(SLAVE,address=0XA0,sda=PIN_C4,scl=PIN_C3,slow)

INT8 GG;

void main()
{
int i;


WHILE(!I2C_POLL())
{
GG=i2c_read();
BREAK;

}
LCD_INIT();
DELAY_MS(200);
LCD_GOTOXY(1,1); PRINTF(LCD_PUTC,"\fGG=%d",GG);
}
***********************************************************
master here!
#include <16F77.h>
#use delay(clock=4000000)
#fuses XT,noWDT
#use i2c(Master,sda=PIN_C4,scl=PIN_C3,slow)


int8 dk;


void main()
{

while(1)
{
i2c_start();
i2c_write(0xA0);
i2c_write('a');

i2c_stop();
i2c_start();
i2c_write(0xA1);
dk=i2c_read();
i2c_stop();
output_high (PIN_B7);
DELAY_MS(1000);
output_LOW (PIN_B7);
//IF (DK==9)
// {BREAK;}
}
}
***************************************************
i find lcd panel display a number (-96)
and i master want to send a english word .exp "A"
i must how written it . thks
i dont find question or variant code error area,
please everone can teach me ,thks
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Sep 09, 2006 12:29 pm     Reply with quote

There is no need to start a new thread every time you have another
question on i2c. I answered your question in the original thread just
two minutes ago.
cjusto



Joined: 26 Apr 2006
Posts: 38
Location: Portugal

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PostPosted: Sat Sep 09, 2006 12:31 pm     Reply with quote

Hi! the -96 you got, is the adress.


u should read the next byte received from the i2c bus.
whung.john
Guest







how to rewritten thread code
PostPosted: Sun Sep 10, 2006 12:21 am     Reply with quote

cjusto wrote:
Hi! the -96 you got, is the adress.
u should read the next byte received from the i2c bus.


****************************************************
i understand for sir say method,but i
not method can rewritten the slave area,
so sir can help me ,how to clearly change the error get information ,
can u help me ?thks very much !
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