I am having difficulty getting P2.6 and P2.7 to be used as general IO pins instead of XTAL pins, on a MSP430G2553.
My setting from CCS 6.1:
BCSCTL1 = CALBC1_1MHZ;
DCOCTL = CALDCO_1MHZ;
_BIS_SR(OSCOFF);
P2DIR = 0xFF; //set all P2 to output
P2OUT = 0x00; //set all P2 to high
Is there more I have to do?
Hi Steve!
As you can see from the User's Guide for the MSP430G2553, the P2SEL register's initial state is 0xC0 (P2SEL2 is 0x00):
This is binary 1100 0000 for P2SEL, so P2.6 and P2.7 have the P2SEL bit set. A look into the datasheet tells you the following:
(Same for P2.7)
That means, the initial function for P2.6 and P2.7 is XIN and XOUT - to use them as GPIOs, simply clear the P2SEL bits for these pins by writing
P2SEL &= ~0xC0;
Dennis
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