msp430/examples/spi.txt


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

unsigned char RXData = 0;
unsigned char TXData;

: spi-init
  bit2 bit5 or bit6 or p3sel0 byte set
  ucb1ctlw0
  ucswrst over reg set
  ucmst ucsync or ucckpl or ucmsb or over reg set
  ucssel__aclk over reg set
  2 ucb1brw reg!
  ucswrst swap reg clear ;

: spi-emit
  begin ucb1ifg reg@ uctxifg and until
  ucb1txbuf reg! ;