ARM写程序~~关于二进制数高低位赋值问题

[usr_src]

如果有一个两个变量data1和data2,有一个16位的二进制数，要将高八位赋给data1,低八位赋给data2，怎么实现？

[Cricketol]

U16 val = 0x1234;
U8 data1, data2;
data1 = val>>8;      //mov low 8 bits in val to data1
data2 = (U8)val;     //mov high 8 bits in val to data2

[iamqk]

移位操作

[cychen1984]

[Quote=引用 2 楼 cricketol 的回复:]
C/C++ code

U16 val=0x1234;
U8 data1, data2;
data1= val>>8;//mov low 8 bits in val to data1data2= (U8)val;//mov high 8 bits in val to data2
[/Quote]
有问题啊,data1= val>>8;//为0x12, 明明是高位,另外大数端,小数端不分?

[cychen1984]

int i = 0x1234,low,high;
low = i & 0xff;
high = i >> 8;