keil c 的错误error C141: syntax error near '='

#include <reg51.h>

#define LED P1^1
#define KEY_ON  P1^6
#define KEY_OFF P1^7

void main(void)
{
    KEY_ON  = 1;    //开关亮输出高电平，接通就变为低电平
    KEY_OFF = 1;    //开关灭输出高电平，接通就变为低电平
    while(1)
    {
        if(KEY_ON==0)   LED = 1;
        if(KEY_OFF==0)  LED = 0;
    }
}

//就是这一小段程序编译提示：
compiling LED_ONOFF.c…
LED_ONOFF.C(9): error C141: syntax error near ‘=’
LED_ONOFF.C(10): error C141: syntax error near ‘=’
LED_ONOFF.C(13): error C141: syntax error near ‘=’
LED_ONOFF.C(14): error C141: syntax error near ‘=’
Target not created

#define是宏定义语句
想做的是位操作，应该改将#define LED P1^1
#define KEY_ON  P1^6
#define KEY_OFF P1^7

改为
sbit LED = P1^1;
sbit KEY_ON = P1^6;
sbit KEY_OFF = P1^7;
这样文中的“=”就不违法了

keil c 的错误error C141: syntax error near '='

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