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The 8051 Architecture by kenith.j.Ayala
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mhai_nguyen
Fri Nov 03 2006, 08:21PM
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Hi Rickey. Can You help me?
I have about code:
When it make a statement is:
bit I2C_Start(void)
bit I2C_Send_Byte(unsigned char)// function return a value is bit
unsigned char I2C_Get_Byte(bit)
bit I2C_Stop(void)
But in program main() is:

I2C_Start();
I2C_Send_Byte(device_address | I2C_WRITE); //no return? value return
where??? Why?
while (there is data to send)
I2C_Send_Byte(next_byte_of_data);
I2C_Stop();
I am waitting from Rickey or noone can answer my question.


-------------------------------------------------------

06/05/1982
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Ajay
Fri Nov 03 2006, 11:38PM
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there is a simple answer to that.
the function I2C_Send_Byte(...)
is returning a value.. a bit value but we are not storing it anywhere... the bit returned is the status will be '1' "yes" or '0' "no" which tells the byte has sent successfuly or not..here in your case..
wrote ...

I2C_Start();
I2C_Send_Byte(device_address | I2C_WRITE); //no return? value return
where??? Why?
while (there is data to send)
I2C_Send_Byte(next_byte_of_data);
I2C_Stop();


you can make use of this return value as....

I2C_Start();
if(I2C_Send_Byte(device_address | I2C_WRITE)
{
   while (there is data to send)
   if(!(I2C_Send_Byte(next_byte_of_data));  //I am using NOT logic coz.. i am taking
    //'1' - success '0' - not success
      break;  //stop if the I2C is not sent successfully)
}
   I2C_Stop();
  //exit the program or function

hope you understood.
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sridharnarla
Sat Mar 10 2007, 03:53AM
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hi rickey i need the 8051 buk..the link is not workin...cud u pls send tht to my id... sridharnarla@rediffmail.com
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mandar
Tue Jul 17 2007, 07:34AM
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Thankzs
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