大家用过max5483吗？郁闷的问题！

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ccjchen|

楼主 | 2007-9-10 22:10 | 只看该作者回帖奖励

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Direct, TE, IDMA, DMA, FOR

max5483单独控制正确，和max5481合在一起控制也正确，但是当我把这些程序移到我的主程序中后只有max5481正确，而max5481 、max5483他们的控制程序是一样的，为什么max5481正确，max5483就不正确呢？
#include <reg52.h>
#include <intrins.h>
#include <absacc.h>
#define uchar unsigned char
#define uint  unsigned int
sbit  MAX5481_CS18 = P1^5;
sbit  MAX5481_CS5  = P1^4;
sbit  MAX5481_SCLK = P1^6;
sbit  MAX5481_DIN  = P1^7;

//max5481
void max5481write(uchar direct,uchar data1,uchar data2);
void max5483write(uchar direct,uchar data1,uchar data2);
void max5481copy(uchar direct);

void main()
{

   while(1)
    {
         max5481write(0x00,0x56,0x00);
        max5483write(0x00,0x65,0xc0);
    }
}

//max5483
void max5483write(uchar direct,uchar data1,uchar data2)
{
    uchar i;
    MAX5481_SCLK = 0;
    MAX5481_CS18=0;
    for (i=0;i<8;i++)    //上升沿写入命令
    {
         MAX5481_SCLK =0;
       MAX5481_DIN = (bit)(direct&0x80);
       direct = direct<<1;
       MAX5481_SCLK =1;
       _nop_(); _nop_();


     }
    // _nop_(); _nop_();
    for (i=0;i<8;i++)    //上升沿写入数据
    {
      MAX5481_SCLK =0;
       MAX5481_DIN = (bit)(data1&0x80);
       data1 = data1<<1;
       MAX5481_SCLK =1;
       _nop_(); _nop_();

        //
    }
    //_nop_(); _nop_();
    for (i=0;i<8;i++)    //上升沿写入数据
    {
       MAX5481_SCLK =0;
       MAX5481_DIN = (bit)(data2&0x80);
       data2 = data2<<1;
       MAX5481_SCLK =1;
       _nop_(); _nop_();


       //
    }
    MAX5481_CS18=1;
}
//max5481
void max5481write(uchar direct,uchar data1,uchar data2)
{
    uchar i;
    MAX5481_SCLK = 0;
    MAX5481_CS5=0;
    for (i=0;i<8;i++)    //上升沿写入命令
    {
       MAX5481_SCLK =0;
       MAX5481_DIN = (bit)(direct&0x80);
       direct = direct<<1;

       MAX5481_SCLK =1;
       _nop_();
     }
     _nop_();
    for (i=0;i<8;i++)    //上升沿写入数据
    {
       MAX5481_SCLK =0;
       MAX5481_DIN = (bit)(data1&0x80);
       data1 = data1<<1;

       MAX5481_SCLK =1;
        _nop_();
    }
    _nop_();
    for (i=0;i<8;i++)    //上升沿写入数据
    {
       MAX5481_SCLK =0;
       MAX5481_DIN = (bit)(data2&0x80);
       data2 = data2<<1;
       MAX5481_SCLK =1;
        _nop_();
    }
    MAX5481_CS5=1;
}

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大家用过max5483吗？郁闷的问题！

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