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typedef struct Settings_t{
    uint8_t type;
    uint8_t *value;
    const struct Settings_t *structure;
}Settings;

const Settings x;

volatile const Settings *p;

p = &x;

volatile Settings * const p;

const char* ptr;

*ptr=5;//Kullanılamaz
ptr=(char*)0x08000040;//Kullanılabilir

"char* const ptr"

ptr=(char*)0x08000040; // Kullanılamaz
*ptr=5;//Kullanılabilir

volatile uint16_t *value;
uint16_t *volatile value;

typedef struct{
    const char * x;
    const char y;
    const char * const t[2]
    volatile char * const k[3]
    const char z[3] 
}strct_temp;

volatile char vc[3];

const char str1[] = {"abcdef"};
const char str2[] = {"ghijkl"};
const char str3[] = {"zxcz"};

const strct_temp strct = { &str1, 0, { &str2, &str3 }, { &vc[0], &vc[1], &vc[2] }, { 1, 1, 1 } };

const strct_temp *volatile r;
const char *volatile h;

void func(const char *volatile text){
    r = &strct;
    *text = r->t[1];
}

void main(void){
    func( &h);
}

*text = r->t[1];

illegal conversion between pointer types
pointer to volatile pointer to const unsigned char -> volatile pointer to pointer to const unsigned char

void func(char * volatile * text){
    r = &strct;
    *text = r->t[1];
}