( ( SSPCON2 & 0x1F ) || ( SSPSTAT & 0x04 ) );

void I2CWait()
{
while ( ( SSPCON2 & 0x1F ) || ( SSPSTAT & 0x04 ) ); /* wait for any pending transfer */
}


Dear All
Kindly please explain everything about below code

( ( SSPCON2 & 0x1F ) || ( SSPSTAT & 0x04 ) );

This is related to PIC16f877a I2C Peripheral


Thanks in advance

This function has a null while loop.
The loop repeats while any of the five low bits of SSPCON2 is 1 or bit 2 of SSPSTAT is 1.
In other words: It waits until all the five low bits of SSPCON2 register are 0 and bit 2 of SSPSTAT is 0.
Regards

Z

refer datasheet about I2C tranfer .
" SSPCON and SSPSTAT are the control and status
registers in SPI mode operation.The SSPCON register
is readable and writable. The lower six bits of the
SSPSTAT are read-only. The upper two bits of the
SSPSTAT are read/write.
SSPSR is the shift register used for shifting data in or
out. SSPBUF is the buffer register to which data bytes
are written to or read from.
In receive operations, SSPSR and SSPBUF together
create a double-buffered receiver. When SSPSR
receives a complete byte, it is transferred to SSPBUF
and the SSPIF interrupt is set.
During transmission, the SSPBUF is not doublebuffered.
A write to SSPBUF will write to both SSPBUF
and SSPSR."

the operator "||" is byte wise or.
and
0x1F = 0001 1111
starting from 1st ";0" => its in slave mode
well for the ext things.. refer datasheet! there's plenty of info..
so its checking for

Dear Magvitron,
Thank you so much for reply
You explained it the way any body can understand,
Really thanks

Dear All
Can any one please explain the everything related the attached image
This is related to the PIC16f877a i2c operation
Thanks in advance