keil如何处理48位数据啊
unsigned long int freq1 = 0,freq2=0;
freq1= (unsigned long int)((unsigned long int)(938249.9*Freqency)&0xffffffff);
freq2= (unsigned long int)(((unsigned long int)(938249.9*Freqency)>>32)&0xffffffff);
其中Freqency达到30 000 000HZ 所有(938249.9*Freqency)这个数已经是48位数据了 keil下怎么处理啊