void c_hdsk(void)
{
    REG_ANALOG_GP_TIE->bf.h_en = 0xff;  //Tell vector c ready
    REG_ANALOG_GP_TIE->bf.h_en = 0x0;     //clear
}

void v_hdsk(void)
{
    int reg_rdata = 0;

    do
    {
        reg_rdata = REG_ANALOG_GP_TIE->bf.h_en;

        printf("reg_rdata is %x\n", reg_rdata); //for debug;
        delay_50us(1);

    }
    while(reg_rdata != 0xf);   //Get vector ready

}