ad9954.c

一个基于AD9954的430单片机编程

#include  "includes.h"

/*-------------------------------------------------------------------------------------------------------------
功能：初始化9954以及控制它的端口
入口：无
出口：无
-------------------------------------------------------------------------------------------------------------*/
void AD9954Init(void)
{
  P6OUT=AD9954_CS;
  P5DIR|=AD9954_IOUPDATE | AD9954_PS0 | AD9954_PS1 ;
  P5OUT&=~( AD9954_IOUPDATE | AD9954_PS0 | AD9954_PS1 );
}

/*-------------------------------------------------------------------------------------------------------------
功能：向9954发送指令
入口：add,寄存器地址
      cmdn，传送数据的字节数
      cmd，指向传送数据的指针
出口：无
-------------------------------------------------------------------------------------------------------------*/
void AD9954PutCmd(char add,char cmdn,char *cmd)
{
  char n;
  
  while(0<(SPI0Sendn-SPI0Datn)&&(SPI0Sendn-SPI0Datn)<cmdn*2+3);
  SPI0SendDat[SPI0Datn++]=AD9954_CS;
  SPI0SendDat[SPI0Datn++]=add;
  for(n=0;n<cmdn;n++)
  {
    SPI0SendDat[SPI0Datn++]=AD9954_CS;
    SPI0SendDat[SPI0Datn++]=cmd[n];
  }
  IE1=UTXIE0;                               //启动传送
  while(!(U0TCTL&TXEPT));
  P5OUT|=AD9954_IOUPDATE;
  for(n=0;n<100;n++);
  P5OUT&=~AD9954_IOUPDATE;
}

/*-------------------------------------------------------------------------------------------------------------
功能：向9954写Ram
入口：ramn，传送数据的字节数
      ram，指向传送数据的指针
出口：无
-------------------------------------------------------------------------------------------------------------*/
void AD9954PutRam(char *ram)
{
  char n;
  
//  while((0<(SPI0Sendn-SPI0Datn))&&((SPI0Sendn-SPI0Datn)<9));      //该语句有问题
  do n=SPI0Sendn-SPI0Datn;
  while(0<n&&n<9);
//  SPI0SendDat[SPI0Datn++]=AD9954_CS;
//  SPI0SendDat[SPI0Datn++]=RAM;
  for(n=0;n<4;n++)
  {
    SPI0SendDat[SPI0Datn++]=AD9954_CS;
    SPI0SendDat[SPI0Datn++]=ram[n];
  }
  IE1=UTXIE0;                               //启动传送
}