Marquis wrote:
Dear All,
I am doing my frist project on using the MSP430 to read data
from a parallel ADC. I know C and C++ , however, I found that there is
a little bit different with the MSPGCC and GCC. Can you tell me where
can I find books / document taking about the MSPGCC?
I need the explanation of some strange operators such as,
P1OUT |= 0x00
or P1OUT = (1<<i) | (0x80>>(o&7));
What do you find strange about these? They are perfectly normal C. The
only thing a little unusual, if you have only programmed C on a PC or
server, is what P1OUT represents. It is a location in the memoery space
which is actual a register in parallel port 1 - the output data register
to be precise. This means it has to be treated as a volatile data item
by the compiler, and its address is fixed.
P1OUT |= 0x00; isn't going to do a whole lot :-\
P1OUT = (1<<i) | (0x80>>(o&7)); seems a typical C statement.
Regards,
Steve
