PGM char msg_btn_mode[]         = "btn0";
PGM char msg_btn_up[]           = "btn1";
PGM char msg_btn_dn[]           = "btn2";
PGM char msg_btn_cancel[]       = "btn3";
PGM char msg_syg_extstart_on[]  = "ES 1";
PGM char msg_syg_extstart_off[] = "ES 0";
PGM char msg_syg_flame_on[]     = "FLA1";
PGM char msg_syg_flame_off[]    = "FLA0";
PGM char msg_err_t[]            = "tErr";
PGM char msg_dspl_test[]        = "????";
PGM char msg_temper_test[]      = "????";

char PGM* msg_p = msg_dspl_test;

    switch( (u16)msg_p )
    {
    case msg_dspl_test:
        break;
    }

ругается "case msg_dspl_test:" Error[Pe028]: expression must have a constant value

как бы извернутся ?