ad421.c

msp430x44x系列单片机对A/D421的操作

#include "msp430x44x.h"

#include "../utility/delay.h"
#include "../utility/user_stdio.h"

#include "ad421.h"

void AD421Init(void)
{
  ILOOP_SEL &=~(ILOOP_LATCH + ILOOP_CLOCK + ILOOP_DATA);
  ILOOP_DIR |= ILOOP_LATCH + ILOOP_CLOCK + ILOOP_DATA;
  
  CLR_CLOCK;
  CLR_DATA;
  SET_LATCH;
}

void WriteAD421(unsigned int data)
{
     unsigned char i;
     AD421Init();
     delay_ms(2);
     CLR_LATCH;
     delay_ms(2);
  
     for(i = 0; i<16; i++)
     {
        delay_ms(2);
        CLR_CLOCK;
        delay_ms(2);
        if(data & 0x8000)
        {
          SET_DATA;
        }
        else
        {
          CLR_DATA;
        }
        data <<=1;
        delay_ms(2);
        SET_CLOCK;
     }
     delay_ms(2);
     CLR_CLOCK;
     CLR_DATA;
     delay_ms(2);
     SET_LATCH;

}