象这样的错误该如何改呢?请大侠给个示范

void spi_Init(eBandrate br)
{
S3C2410_GPECON &=~(0x3f<<22);
S3C2410_GPECON |=(0x2a<<22); // init GPEIO is SPI Mode
SPPRE0 &=0; //Cleae SPPRE0
................(还有些enable/disable的函数)
can.c:157: error: invalid lvalue in assignment
can.c:158: error: invalid lvalue in assignment
can.c:159: error: invalid lvalue in assignment
can.c:163: error: invalid lvalue in assignment
先谢过~!