test44x_spi0_016x.c

来自「AQ430 C Code,支持LSD-TEST430F44X」· C语言 代码 · 共 29 行

#include  "msp430x44x.h"

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;             // Stop WDT
//  FLL_CTL0 |= XCAP14PF;                 // Configure load caps
  ME1 |= USPIE0;                        // Enable USART0 SPI mode
  UTCTL0 = CKPH+SSEL1+SSEL0+STC;        // SMCLK, 3-pin mode
  UCTL0 = CHAR+SYNC+MM;                 // 8-bit SPI Master **SWRST**
  UBR00 = 0x02;                         // UCLK/2 
  UBR10 = 0x00;                         // 0
  UMCTL0 = 0x00;                        // no modulation
  P3SEL |= 0x0E;                        // P3.1-3 SPI option select
  P3DIR |= 0x01;                        // P3.0 output direction
  _EINT();                              // Enable interrupts
  
  while (1)                             
  {
    unsigned i;
    for (i = 0xFFFF; i > 0; i--);         // Delay        
    while ((IFG1 & UTXIFG0) == 0);        // USART0 TX buffer ready?
    P3OUT &= ~0x01;                       // Latch data into 'HC165
    P3OUT |= 0x01;
    TXBUF0 = RXBUF0;                      // RXBUF0 to TXBUF0
  }
}