nec 16位 的乘法器
下面是aaa=2000/3,为什么除法不能得结果?乘法都能通过,除为什么不能通过,不知道哪里出错?我用的上NEC78F1211
DIVMODE = 1;
MDAH = 0;
MDAL = 2000;
MDBH = 0;
MDBL = 3;
DIVST = 1;
while(DIVST);
aaa = MDAL; union d_long
{
unsigned long twoword;
struct
{
unsigned int low;
unsigned int high;
}int16;
}mda,mdb;
unsigned long div32( void )
{
DIVMODE = 1;
MDAH = mda.int16.high;
MDAL = mda.int16.low;
MDBH = mdb.int16.high;
MDBL = mdb.int16.low;
DIVST = 1;
while( DIVST );
mda.int16.high = MDAH;
mda.int16.low= MDAL;
return mda.twoword;
}
我写的和你一样 应该可以的。我用的是1213 怎么调用?
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