main.c(94): error C141: syntax error near 'if'

求助keil5中报 main.c(94): error C141: syntax error near 'if'

#include <REGX52.H>

typedef unsigned char u8;
typedef unsigned int u16;

#define KEY_MATRIX_PORT        P1

#define SMG_A_DP_PORT        P0

u8 gsmg_code[17]={0x3F,0x06,0x5B,0x4F,
                  0x66,0x6D,0x7D,0x07,
                  0x7F,0x6F,0x77,0x7C,
                  0x39,0x5E,0x79,0x71};
                //共阴0-F

void delay_10us(u16 ten_us)//当传入Ten_us=1时，大约延时10us
{
    while(ten_us--);
}

u8 key_matrix_flip_scan(void)//线翻转方式扫描
{
    static u8 key_value=0;
    
    KEY_MATRIX_PORT=0X0F;
    if(KEY_MATRIX_PORT!=0x0f)
    {
        delay_10us(1000)
        //测试列
        if(KEY_MATRIX_PORT!=0x0f)
        {
            KEY_MATRIX_PORT=0X0f;
            switch(KEY_MATRIX_PORT)
            {
                case 0x07:key_value=1;break;
                case 0x0b:key_value=2;break;
                case 0x0d:key_value=3;break;
                case 0x0e:key_value=4;break;
            }
            KEY_MATRIX_PORT=0xf0;//测试行
            switch(KEY_MATRIX_PORT)
            {
                case 0x70:key_value=key_value;break;
                case 0xb0:key_value=key_value+4;break;
                case 0xd0:key_value=key_value+8;break;
                case 0xe0:key_value=key_value=12;break;
            }
            while(KEY_MATRIX_PORT!=0xf0);
        }
    }
    else key_value=0;
    return key_value;
}


void main()
{
    u8 key=0;
    SMG_A_DP_PORT=0x00;
    while(1)
    {
        key=key_matrix_flip_scan ();
        //key=key_matrix_ranks_scan();
        if(key!=0)
        {
            SMG_A_DP_PORT=gsmg_code[key-1];
        }
    }
}